[BAEL-19673] - Move articles out of jackson part 1

jackson-annotations/README.md

@@ -0,0 +1,11 @@
+## Jackson Annotations
+
+This module contains articles about Jackson annotations.
+
+### Relevant Articles: 
+- [Guide to @JsonFormat in Jackson](https://www.baeldung.com/jackson-jsonformat)
+- [More Jackson Annotations](https://www.baeldung.com/jackson-advanced-annotations)
+- [Jackson Annotation Examples](https://www.baeldung.com/jackson-annotations)
+- [Jackson – Bidirectional Relationships](https://www.baeldung.com/jackson-bidirectional-relationships-and-infinite-recursion)
+- [Jackson – Change Name of Field](https://www.baeldung.com/jackson-name-of-property)
+- [Jackson Ignore Properties on Marshalling](https://www.baeldung.com/jackson-ignore-properties-on-serialization)

jackson-annotations/pom.xml

@@ -0,0 +1,60 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>jackson-annotations</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>jackson-annotations</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-xml</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.module</groupId>
+            <artifactId>jackson-module-jsonSchema</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>json-path</artifactId>
+            <version>${rest-assured.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>jackson-annotations</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+        <assertj.version>3.11.0</assertj.version>
+        <rest-assured.version>3.1.1</rest-assured.version>
+    </properties>
+
+</project>

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithIdentity.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.ObjectIdGenerators;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithIgnore.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 public class ItemWithIgnore {
     public int id;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/ItemWithRef.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 import com.fasterxml.jackson.annotation.JsonManagedReference;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithIdentity.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 import java.util.ArrayList;
 import java.util.List;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithIgnore.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 import java.util.ArrayList;
 import java.util.List;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/bidirection/UserWithRef.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.bidirection;
+package com.baeldung.jackson.annotation.bidirection;
 
 import java.util.ArrayList;
 import java.util.List;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/CustomDateDeserializer.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.date;
+package com.baeldung.jackson.annotation.date;
 
 import java.io.IOException;
 import java.text.ParseException;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/CustomDateSerializer.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.date;
+package com.baeldung.jackson.annotation.date;
 
 import java.io.IOException;
 import java.text.SimpleDateFormat;

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/EventWithFormat.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.date;
+package com.baeldung.jackson.annotation.date;
 
 import java.util.Date;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/date/EventWithSerializer.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.date;
+package com.baeldung.jackson.annotation.date;
 
 import java.util.Date;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/deserialization/ItemDeserializerOnClass.java

@@ -0,0 +1,41 @@
+package com.baeldung.jackson.annotation.deserialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.ItemWithSerializer;
+import com.baeldung.jackson.annotation.dtos.User;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
+import com.fasterxml.jackson.databind.node.IntNode;
+
+public class ItemDeserializerOnClass extends StdDeserializer<ItemWithSerializer> {
+
+    private static final long serialVersionUID = 5579141241817332594L;
+
+    public ItemDeserializerOnClass() {
+        this(null);
+    }
+
+    public ItemDeserializerOnClass(final Class<?> vc) {
+        super(vc);
+    }
+
+    /**
+     * {"id":1,"itemNr":"theItem","owner":2}
+     */
+    @Override
+    public ItemWithSerializer deserialize(final JsonParser jp, final DeserializationContext ctxt) throws IOException, JsonProcessingException {
+        final JsonNode node = jp.getCodec()
+            .readTree(jp);
+        final int id = (Integer) ((IntNode) node.get("id")).numberValue();
+        final String itemName = node.get("itemName")
+            .asText();
+        final int userId = (Integer) ((IntNode) node.get("owner")).numberValue();
+
+        return new ItemWithSerializer(id, itemName, new User(userId, null));
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/Item.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.dtos;
+
+public class Item {
+    public int id;
+    public String itemName;
+    public User owner;
+
+    public Item() {
+        super();
+    }
+
+    public Item(final int id, final String itemName, final User owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public User getOwner() {
+        return owner;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/ItemWithSerializer.java

@@ -0,0 +1,36 @@
+package com.baeldung.jackson.annotation.dtos;
+
+import com.baeldung.jackson.annotation.deserialization.ItemDeserializerOnClass;
+import com.baeldung.jackson.annotation.serialization.ItemSerializerOnClass;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+
+@JsonSerialize(using = ItemSerializerOnClass.class)
+@JsonDeserialize(using = ItemDeserializerOnClass.class)
+public class ItemWithSerializer {
+    public final int id;
+    public final String itemName;
+    public final User owner;
+
+    public ItemWithSerializer(final int id, final String itemName, final User owner) {
+        this.id = id;
+        this.itemName = itemName;
+        this.owner = owner;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getItemName() {
+        return itemName;
+    }
+
+    public User getOwner() {
+        return owner;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/User.java

@@ -0,0 +1,26 @@
+package com.baeldung.jackson.annotation.dtos;
+
+public class User {
+    public int id;
+    public String name;
+
+    public User() {
+        super();
+    }
+
+    public User(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/dtos/withEnum/DistanceEnumWithValue.java

@@ -0,0 +1,29 @@
+package com.baeldung.jackson.annotation.dtos.withEnum;
+
+import com.fasterxml.jackson.annotation.JsonValue;
+
+public enum DistanceEnumWithValue {
+    KILOMETER("km", 1000), MILE("miles", 1609.34), METER("meters", 1), INCH("inches", 0.0254), CENTIMETER("cm", 0.01), MILLIMETER("mm", 0.001);
+
+    private String unit;
+    private final double meters;
+
+    private DistanceEnumWithValue(String unit, double meters) {
+        this.unit = unit;
+        this.meters = meters;
+    }
+
+    @JsonValue
+    public double getMeters() {
+        return meters;
+    }
+
+    public String getUnit() {
+        return unit;
+    }
+
+    public void setUnit(String unit) {
+        this.unit = unit;
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/exception/UserWithRoot.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.jackson.annotation.exception;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/exception/UserWithRootNamespace.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.jackson.annotation.exception;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/jsonview/Item.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.jsonview;
+package com.baeldung.jackson.annotation.jsonview;
 
 import com.fasterxml.jackson.annotation.JsonView;
 

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/jsonview/Views.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.jsonview;
+package com.baeldung.jackson.annotation.jsonview;
 
 public class Views {
     public static class Public {

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/serialization/ItemSerializer.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.serialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.Item;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class ItemSerializer extends StdSerializer<Item> {
+
+    private static final long serialVersionUID = 6739170890621978901L;
+
+    public ItemSerializer() {
+        this(null);
+    }
+
+    public ItemSerializer(final Class<Item> t) {
+        super(t);
+    }
+
+    @Override
+    public final void serialize(final Item value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeStartObject();
+        jgen.writeNumberField("id", value.id);
+        jgen.writeStringField("itemName", value.itemName);
+        jgen.writeNumberField("owner", value.owner.id);
+        jgen.writeEndObject();
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/annotation/serialization/ItemSerializerOnClass.java

@@ -0,0 +1,32 @@
+package com.baeldung.jackson.annotation.serialization;
+
+import java.io.IOException;
+
+import com.baeldung.jackson.annotation.dtos.ItemWithSerializer;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class ItemSerializerOnClass extends StdSerializer<ItemWithSerializer> {
+
+    private static final long serialVersionUID = -1760959597313610409L;
+
+    public ItemSerializerOnClass() {
+        this(null);
+    }
+
+    public ItemSerializerOnClass(final Class<ItemWithSerializer> t) {
+        super(t);
+    }
+
+    @Override
+    public final void serialize(final ItemWithSerializer value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeStartObject();
+        jgen.writeNumberField("id", value.id);
+        jgen.writeStringField("itemName", value.itemName);
+        jgen.writeNumberField("owner", value.owner.id);
+        jgen.writeEndObject();
+    }
+
+}

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/ItemWithView.java

@@ -1,6 +1,6 @@
 package com.baeldung.jackson.bidirection;
 
-import com.baeldung.jackson.jsonview.Views;
+import com.baeldung.jackson.bidirection.jsonview.Views;
 
 import com.fasterxml.jackson.annotation.JsonView;
 

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/UserWithView.java

@@ -3,7 +3,7 @@ package com.baeldung.jackson.bidirection;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.baeldung.jackson.jsonview.Views;
+import com.baeldung.jackson.bidirection.jsonview.Views;
 
 import com.fasterxml.jackson.annotation.JsonView;
 

jackson-annotations/src/main/java/com/baeldung/jackson/bidirection/jsonview/Views.java

@@ -0,0 +1,9 @@
+package com.baeldung.jackson.bidirection.jsonview;
+
+public class Views {
+    public static class Public {
+    }
+
+    public static class Internal extends Public {
+    }
+}

jackson-annotations/src/main/java/com/baeldung/jackson/domain/Person.java

@@ -0,0 +1,30 @@
+package com.baeldung.jackson.domain;
+
+public class Person {
+
+    private String firstName;
+    private String lastName;
+    
+    public Person(String firstName, String lastName) {
+        super();
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+}
+

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/AdvancedAnnotationsUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import static org.hamcrest.CoreMatchers.containsString;
 import static org.hamcrest.CoreMatchers.instanceOf;
@@ -12,10 +12,10 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.baeldung.jackson.annotation.extra.AppendBeans.BeanWithAppend;
-import com.baeldung.jackson.annotation.extra.AppendBeans.BeanWithoutAppend;
-import com.baeldung.jackson.annotation.extra.IdentityReferenceBeans.BeanWithIdentityReference;
-import com.baeldung.jackson.annotation.extra.IdentityReferenceBeans.BeanWithoutIdentityReference;
+import com.baeldung.jackson.advancedannotations.AppendBeans.BeanWithAppend;
+import com.baeldung.jackson.advancedannotations.AppendBeans.BeanWithoutAppend;
+import com.baeldung.jackson.advancedannotations.IdentityReferenceBeans.BeanWithIdentityReference;
+import com.baeldung.jackson.advancedannotations.IdentityReferenceBeans.BeanWithoutIdentityReference;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectMapper.DefaultTyping;
@@ -23,7 +23,7 @@ import com.fasterxml.jackson.databind.ObjectWriter;
 import com.fasterxml.jackson.module.jsonSchema.JsonSchema;
 import com.fasterxml.jackson.module.jsonSchema.factories.SchemaFactoryWrapper;
 
-public class ExtraAnnotationUnitTest {
+public class AdvancedAnnotationsUnitTest {
     @Test
     public void whenNotUsingJsonIdentityReferenceAnnotation_thenCorrect() throws JsonProcessingException {
         ObjectMapper mapper = new ObjectMapper();

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/AppendBeans.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.databind.annotation.JsonAppend;
 

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/IdentityReferenceBeans.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.annotation.JsonIdentityInfo;
 import com.fasterxml.jackson.annotation.JsonIdentityReference;

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/NamingBean.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.databind.PropertyNamingStrategy;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/POJOBuilderBean.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/PropertyDescriptionBean.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.annotation.JsonPropertyDescription;
 

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/TypeIdBean.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import com.fasterxml.jackson.annotation.JsonTypeId;
 

jackson-annotations/src/test/java/com/baeldung/jackson/advancedannotations/TypeIdResolverStructure.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.annotation.extra;
+package com.baeldung.jackson.advancedannotations;
 
 import java.util.List;
 

jackson-annotations/src/test/java/com/baeldung/jackson/annotation/JacksonAnnotationUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.test;
+package com.baeldung.jackson.annotation;
 
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.is;
@@ -14,32 +14,18 @@ import java.util.TimeZone;
 
 import org.junit.Test;
 
-import com.baeldung.jackson.annotation.AliasBean;
-import com.baeldung.jackson.annotation.BeanWithCreator;
-import com.baeldung.jackson.annotation.BeanWithCustomAnnotation;
-import com.baeldung.jackson.annotation.BeanWithFilter;
-import com.baeldung.jackson.annotation.BeanWithGetter;
-import com.baeldung.jackson.annotation.BeanWithIgnore;
-import com.baeldung.jackson.annotation.BeanWithInject;
-import com.baeldung.jackson.annotation.ExtendableBean;
-import com.baeldung.jackson.annotation.MyBean;
-import com.baeldung.jackson.annotation.PrivateBean;
-import com.baeldung.jackson.annotation.RawBean;
-import com.baeldung.jackson.annotation.UnwrappedUser;
-import com.baeldung.jackson.annotation.UserWithIgnoreType;
-import com.baeldung.jackson.annotation.Zoo;
-import com.baeldung.jackson.bidirection.ItemWithIdentity;
-import com.baeldung.jackson.bidirection.ItemWithRef;
-import com.baeldung.jackson.bidirection.UserWithIdentity;
-import com.baeldung.jackson.bidirection.UserWithRef;
-import com.baeldung.jackson.date.EventWithFormat;
-import com.baeldung.jackson.date.EventWithSerializer;
-import com.baeldung.jackson.dtos.MyMixInForIgnoreType;
-import com.baeldung.jackson.dtos.withEnum.DistanceEnumWithValue;
-import com.baeldung.jackson.exception.UserWithRoot;
-import com.baeldung.jackson.exception.UserWithRootNamespace;
-import com.baeldung.jackson.jsonview.Item;
-import com.baeldung.jackson.jsonview.Views;
+import com.baeldung.jackson.annotation.bidirection.ItemWithIdentity;
+import com.baeldung.jackson.annotation.bidirection.ItemWithRef;
+import com.baeldung.jackson.annotation.bidirection.UserWithIdentity;
+import com.baeldung.jackson.annotation.bidirection.UserWithRef;
+import com.baeldung.jackson.annotation.date.EventWithFormat;
+import com.baeldung.jackson.annotation.date.EventWithSerializer;
+import com.baeldung.jackson.ignore.dtos.MyMixInForIgnoreType;
+import com.baeldung.jackson.annotation.dtos.withEnum.DistanceEnumWithValue;
+import com.baeldung.jackson.annotation.exception.UserWithRoot;
+import com.baeldung.jackson.annotation.exception.UserWithRootNamespace;
+import com.baeldung.jackson.annotation.jsonview.Item;
+import com.baeldung.jackson.annotation.jsonview.Views;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.InjectableValues;
 import com.fasterxml.jackson.databind.MapperFeature;
@@ -352,13 +338,13 @@ public class JacksonAnnotationUnitTest {
     // @Ignore("Jackson 2.7.1-1 seems to have changed the API regarding mixins")
     @Test
     public void whenSerializingUsingMixInAnnotation_thenCorrect() throws JsonProcessingException {
-        final com.baeldung.jackson.dtos.Item item = new com.baeldung.jackson.dtos.Item(1, "book", null);
+        final com.baeldung.jackson.annotation.dtos.Item item = new com.baeldung.jackson.annotation.dtos.Item(1, "book", null);
 
         String result = new ObjectMapper().writeValueAsString(item);
         assertThat(result, containsString("owner"));
 
         final ObjectMapper mapper = new ObjectMapper();
-        mapper.addMixIn(com.baeldung.jackson.dtos.User.class, MyMixInForIgnoreType.class);
+        mapper.addMixIn(com.baeldung.jackson.annotation.dtos.User.class, MyMixInForIgnoreType.class);
 
         result = mapper.writeValueAsString(item);
         assertThat(result, not(containsString("owner")));

jackson-annotations/src/test/java/com/baeldung/jackson/bidirection/JacksonBidirectionRelationUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.test;
+package com.baeldung.jackson.bidirection;
 
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.not;
@@ -9,19 +9,7 @@ import java.io.IOException;
 
 import org.junit.Test;
 
-import com.baeldung.jackson.bidirection.Item;
-import com.baeldung.jackson.bidirection.ItemWithIdentity;
-import com.baeldung.jackson.bidirection.ItemWithIgnore;
-import com.baeldung.jackson.bidirection.ItemWithRef;
-import com.baeldung.jackson.bidirection.ItemWithSerializer;
-import com.baeldung.jackson.bidirection.ItemWithView;
-import com.baeldung.jackson.bidirection.User;
-import com.baeldung.jackson.bidirection.UserWithIdentity;
-import com.baeldung.jackson.bidirection.UserWithIgnore;
-import com.baeldung.jackson.bidirection.UserWithRef;
-import com.baeldung.jackson.bidirection.UserWithSerializer;
-import com.baeldung.jackson.bidirection.UserWithView;
-import com.baeldung.jackson.jsonview.Views;
+import com.baeldung.jackson.bidirection.jsonview.Views;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/JacksonSerializationIgnoreUnitTest.java

@@ -10,15 +10,15 @@ import java.util.Map;
 
 import org.junit.Test;
 
-import com.baeldung.jackson.dtos.MyDto;
-import com.baeldung.jackson.dtos.MyDtoIncludeNonDefault;
-import com.baeldung.jackson.dtos.MyDtoWithFilter;
-import com.baeldung.jackson.dtos.MyDtoWithSpecialField;
-import com.baeldung.jackson.dtos.MyMixInForIgnoreType;
+import com.baeldung.jackson.ignore.dtos.MyDto;
+import com.baeldung.jackson.ignore.dtos.MyDtoIncludeNonDefault;
+import com.baeldung.jackson.ignore.dtos.MyDtoWithFilter;
+import com.baeldung.jackson.ignore.dtos.MyDtoWithSpecialField;
+import com.baeldung.jackson.ignore.dtos.MyMixInForIgnoreType;
 import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreField;
 import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreFieldByName;
 import com.baeldung.jackson.ignore.dtos.MyDtoIgnoreNull;
-import com.baeldung.jackson.serialization.MyDtoNullKeySerializer;
+import com.baeldung.jackson.ignore.dtos.MyDtoNullKeySerializer;
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.core.JsonParseException;

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDto.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.ignore.dtos;
+
+public class MyDto {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDto() {
+        super();
+    }
+
+    public MyDto(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoIncludeNonDefault.java

@@ -0,0 +1,43 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
+
+@JsonInclude(Include.NON_DEFAULT)
+public class MyDtoIncludeNonDefault {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoIncludeNonDefault() {
+        super();
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoNullKeySerializer.java

@@ -1,27 +1,27 @@
-package com.baeldung.jackson.serialization;
-
-import java.io.IOException;
-
-import com.fasterxml.jackson.core.JsonGenerator;
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.SerializerProvider;
-import com.fasterxml.jackson.databind.ser.std.StdSerializer;
-
-public class MyDtoNullKeySerializer extends StdSerializer<Object> {
-
-    private static final long serialVersionUID = -4478531309177369056L;
-
-    public MyDtoNullKeySerializer() {
-        this(null);
-    }
-
-    public MyDtoNullKeySerializer(final Class<Object> t) {
-        super(t);
-    }
-
-    @Override
-    public void serialize(final Object value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
-        jgen.writeFieldName("");
-    }
-
-}
+package com.baeldung.jackson.ignore.dtos;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+public class MyDtoNullKeySerializer extends StdSerializer<Object> {
+
+    private static final long serialVersionUID = -4478531309177369056L;
+
+    public MyDtoNullKeySerializer() {
+        this(null);
+    }
+
+    public MyDtoNullKeySerializer(final Class<Object> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(final Object value, final JsonGenerator jgen, final SerializerProvider provider) throws IOException, JsonProcessingException {
+        jgen.writeFieldName("");
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoWithFilter.java

@@ -0,0 +1,50 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonFilter;
+
+@JsonFilter("myFilter")
+public class MyDtoWithFilter {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoWithFilter() {
+        super();
+    }
+
+    public MyDtoWithFilter(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyDtoWithSpecialField.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.ignore.dtos;
+
+public class MyDtoWithSpecialField {
+
+    private String[] stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDtoWithSpecialField() {
+        super();
+    }
+
+    public MyDtoWithSpecialField(final String[] stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String[] getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String[] stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/ignore/dtos/MyMixInForIgnoreType.java

@@ -0,0 +1,8 @@
+package com.baeldung.jackson.ignore.dtos;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreType;
+
+@JsonIgnoreType
+public class MyMixInForIgnoreType {
+    //
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/JsonPropertyUnitTest.java

@@ -0,0 +1,44 @@
+package com.baeldung.jackson.jsonproperty;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerationException;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+
+public class JsonPropertyUnitTest {
+
+    @Test
+    public final void whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtoAsString = mapper.writeValueAsString(new MyDto());
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+    }
+
+    @Test
+    public final void givenNameOfFieldIsChangedViaAnnotationOnGetter_whenSerializing_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final MyDtoFieldNameChanged dtoObject = new MyDtoFieldNameChanged();
+        dtoObject.setStringValue("a");
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("stringValue")));
+        assertThat(dtoAsString, containsString("strVal"));
+        System.out.println(dtoAsString);
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/MyDto.java

@@ -0,0 +1,54 @@
+package com.baeldung.jackson.jsonproperty;
+
+public class MyDto {
+
+    private String stringValue;
+    private int intValue;
+    private boolean booleanValue;
+
+    public MyDto() {
+        super();
+    }
+
+    public MyDto(final String stringValue, final int intValue, final boolean booleanValue) {
+        super();
+
+        this.stringValue = stringValue;
+        this.intValue = intValue;
+        this.booleanValue = booleanValue;
+    }
+
+    // API
+
+    public String getStringValue() {
+        return stringValue;
+    }
+
+    public void setStringValue(final String stringValue) {
+        this.stringValue = stringValue;
+    }
+
+    public int getIntValue() {
+        return intValue;
+    }
+
+    public void setIntValue(final int intValue) {
+        this.intValue = intValue;
+    }
+
+    public boolean isBooleanValue() {
+        return booleanValue;
+    }
+
+    public void setBooleanValue(final boolean booleanValue) {
+        this.booleanValue = booleanValue;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        return "MyDto [stringValue=" + stringValue + ", intValue=" + intValue + ", booleanValue=" + booleanValue + "]";
+    }
+
+}

jackson-annotations/src/test/java/com/baeldung/jackson/jsonproperty/MyDtoFieldNameChanged.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.dtos;
+package com.baeldung.jackson.jsonproperty;
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 

jackson-exceptions/README.md

@@ -0,0 +1,7 @@
+## Jackson Exceptions
+
+This module contains articles about Jackson exceptions.
+
+### Relevant Articles: 
+- [Jackson Exceptions – Problems and Solutions](https://www.baeldung.com/jackson-exception)
+- [Jackson – JsonMappingException (No serializer found for class)](https://www.baeldung.com/jackson-jsonmappingexception)

jackson-exceptions/pom.xml

@@ -0,0 +1,33 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>jackson-exceptions</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>jackson-exceptions</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>jackson-exceptions</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+</project>

jackson-exceptions/src/main/java/com/baeldung/exceptions/User.java

@@ -0,0 +1,26 @@
+package com.baeldung.exceptions;
+
+public class User {
+    public int id;
+    public String name;
+
+    public User() {
+        super();
+    }
+
+    public User(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    // API
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}

jackson-exceptions/src/main/java/com/baeldung/exceptions/UserWithConflict.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.exceptions;
 
 public class UserWithConflict {
     public int id;

jackson-exceptions/src/main/java/com/baeldung/exceptions/UserWithNoDefaultConstructor.java

@@ -0,0 +1,21 @@
+package com.baeldung.exceptions;
+
+public class UserWithNoDefaultConstructor {
+
+    private int id;
+    private String name;
+
+    public UserWithNoDefaultConstructor(final int id, final String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+}

jackson-exceptions/src/main/java/com/baeldung/exceptions/UserWithPrivateFields.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.exceptions;
 
 public class UserWithPrivateFields {
     int id;

jackson-exceptions/src/main/java/com/baeldung/exceptions/UserWithRoot.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.exceptions;
 
 import com.fasterxml.jackson.annotation.JsonRootName;
 

jackson-exceptions/src/main/java/com/baeldung/exceptions/Zoo.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.exceptions;
 
 public class Zoo {
     public Animal animal;

jackson-exceptions/src/main/java/com/baeldung/exceptions/ZooConfigured.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception;
+package com.baeldung.exceptions;
 
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 

jackson-exceptions/src/main/java/com/baeldung/mappingexception/MyDtoNoAccessors.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.dtos;
+package com.baeldung.mappingexception;
 
 public class MyDtoNoAccessors {
 

jackson-exceptions/src/main/java/com/baeldung/mappingexception/MyDtoNoAccessorsAndFieldVisibility.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.dtos;
+package com.baeldung.mappingexception;
 
 import com.fasterxml.jackson.annotation.JsonAutoDetect;
 import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;

jackson-exceptions/src/test/java/com/baeldung/exceptions/JacksonExceptionsUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.exception.test;
+package com.baeldung.exceptions;
 
 import static org.hamcrest.Matchers.containsString;
 import static org.junit.Assert.assertEquals;
@@ -9,11 +9,11 @@ import java.util.List;
 
 import org.junit.Test;
 
-import com.baeldung.jackson.exception.User;
-import com.baeldung.jackson.exception.UserWithPrivateFields;
-import com.baeldung.jackson.exception.UserWithRoot;
-import com.baeldung.jackson.exception.Zoo;
-import com.baeldung.jackson.exception.ZooConfigured;
+import com.baeldung.exceptions.User;
+import com.baeldung.exceptions.UserWithPrivateFields;
+import com.baeldung.exceptions.UserWithRoot;
+import com.baeldung.exceptions.Zoo;
+import com.baeldung.exceptions.ZooConfigured;
 import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
 import com.fasterxml.jackson.annotation.PropertyAccessor;
 import com.fasterxml.jackson.core.JsonFactory;
@@ -78,7 +78,7 @@ public class JacksonExceptionsUnitTest {
         final ObjectMapper mapper = new ObjectMapper();
 
         mapper.reader()
-            .forType(User.class)
+            .forType(UserWithNoDefaultConstructor.class)
             .readValue(json);
     }
 
@@ -87,8 +87,8 @@ public class JacksonExceptionsUnitTest {
         final String json = "{\"id\":1,\"name\":\"John\"}";
         final ObjectMapper mapper = new ObjectMapper();
 
-        final com.baeldung.jackson.dtos.User user = mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+        final User user = mapper.reader()
+            .forType(User.class)
             .readValue(json);
         assertEquals("John", user.name);
     }
@@ -102,7 +102,7 @@ public class JacksonExceptionsUnitTest {
         mapper.enable(DeserializationFeature.UNWRAP_ROOT_VALUE);
 
         mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+            .forType(User.class)
             .readValue(json);
     }
 
@@ -126,7 +126,7 @@ public class JacksonExceptionsUnitTest {
         final ObjectMapper mapper = new ObjectMapper();
 
         mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+            .forType(User.class)
             .readValue(json);
     }
 
@@ -135,8 +135,8 @@ public class JacksonExceptionsUnitTest {
         final String json = "[{\"id\":1,\"name\":\"John\"},{\"id\":2,\"name\":\"Adam\"}]";
         final ObjectMapper mapper = new ObjectMapper();
 
-        final List<com.baeldung.jackson.dtos.User> users = mapper.reader()
-            .forType(new TypeReference<List<com.baeldung.jackson.dtos.User>>() {
+        final List<User> users = mapper.reader()
+            .forType(new TypeReference<List<User>>() {
             })
             .readValue(json);
 
@@ -150,7 +150,7 @@ public class JacksonExceptionsUnitTest {
 
         final ObjectMapper mapper = new ObjectMapper();
         mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+            .forType(User.class)
             .readValue(json);
     }
 
@@ -161,8 +161,8 @@ public class JacksonExceptionsUnitTest {
         final ObjectMapper mapper = new ObjectMapper();
         mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
 
-        final com.baeldung.jackson.dtos.User user = mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+        final User user = mapper.reader()
+            .forType(User.class)
             .readValue(json);
         assertEquals("John", user.name);
     }
@@ -174,7 +174,7 @@ public class JacksonExceptionsUnitTest {
         final ObjectMapper mapper = new ObjectMapper();
 
         mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+            .forType(User.class)
             .readValue(json);
     }
 
@@ -186,8 +186,8 @@ public class JacksonExceptionsUnitTest {
         factory.enable(JsonParser.Feature.ALLOW_SINGLE_QUOTES);
         final ObjectMapper mapper = new ObjectMapper(factory);
 
-        final com.baeldung.jackson.dtos.User user = mapper.reader()
-            .forType(com.baeldung.jackson.dtos.User.class)
+        final User user = mapper.reader()
+            .forType(User.class)
             .readValue(json);
         assertEquals("John", user.name);
     }

jackson-exceptions/src/test/java/com/baeldung/mappingexception/JacksonMappingExceptionUnitTest.java

@@ -0,0 +1,51 @@
+package com.baeldung.mappingexception;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerationException;
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.JsonMappingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.google.common.collect.Lists;
+
+public class JacksonMappingExceptionUnitTest {
+
+    @Test(expected = JsonMappingException.class)
+    public final void givenObjectHasNoAccessors_whenSerializing_thenException() throws JsonParseException, IOException {
+        final String dtoAsString = new ObjectMapper().writeValueAsString(new MyDtoNoAccessors());
+
+        assertThat(dtoAsString, notNullValue());
+    }
+
+    @Test
+    public final void givenObjectHasNoAccessors_whenSerializingWithPrivateFieldsVisibility_thenNoException() throws JsonParseException, IOException {
+        final ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
+        final String dtoAsString = objectMapper.writeValueAsString(new MyDtoNoAccessors());
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+    }
+
+    @Test
+    public final void givenObjectHasNoAccessorsButHasVisibleFields_whenSerializing_thenNoException() throws JsonParseException, IOException {
+        final ObjectMapper objectMapper = new ObjectMapper();
+        final String dtoAsString = objectMapper.writeValueAsString(new MyDtoNoAccessorsAndFieldVisibility());
+
+        assertThat(dtoAsString, containsString("intValue"));
+        assertThat(dtoAsString, containsString("stringValue"));
+        assertThat(dtoAsString, containsString("booleanValue"));
+    }
+
+}

jackson-simple/README.md

@@ -7,9 +7,6 @@ This module contains articles about Jackson that are also part of the Jackson Eb
 The "REST With Spring" Classes: http://bit.ly/restwithspring
 
 ### Relevant Articles: 
-- [Jackson Ignore Properties on Marshalling](https://www.baeldung.com/jackson-ignore-properties-on-serialization)
 - [Jackson Unmarshalling json with Unknown Properties](https://www.baeldung.com/jackson-deserialize-json-unknown-properties)
-- [Jackson Annotation Examples](https://www.baeldung.com/jackson-annotations)
 - [Intro to the Jackson ObjectMapper](https://www.baeldung.com/jackson-object-mapper-tutorial)
 - [Ignore Null Fields with Jackson](https://www.baeldung.com/jackson-ignore-null-fields)
-- [Jackson – Change Name of Field](https://www.baeldung.com/jackson-name-of-property)

jackson-simple/src/test/java/com/baeldung/jackson/dtos/withEnum/DistanceEnumWithValue.java

@@ -1,4 +1,4 @@
-package com.baeldung.jackson.dtos.withEnum;
+package com.baeldung.jackson.annotation.dtos.withEnum;
 
 import com.fasterxml.jackson.annotation.JsonValue;
 

jackson-simple/src/test/java/com/baeldung/jackson/test/JacksonSerializationUnitTest.java

@@ -8,13 +8,10 @@ import static org.junit.Assert.assertThat;
 import java.io.IOException;
 import java.util.List;
 
-import com.baeldung.jackson.dtos.MyDtoFieldNameChanged;
 import com.baeldung.jackson.dtos.User;
 import com.baeldung.jackson.dtos.Item;
 import com.baeldung.jackson.dtos.ItemWithSerializer;
 import com.baeldung.jackson.dtos.MyDto;
-import com.baeldung.jackson.dtos.MyDtoNoAccessors;
-import com.baeldung.jackson.dtos.MyDtoNoAccessorsAndFieldVisibility;
 import com.baeldung.jackson.serialization.ItemSerializer;
 import org.junit.Test;
 
@@ -29,61 +26,6 @@ import com.google.common.collect.Lists;
 
 public class JacksonSerializationUnitTest {
 
-    // tests - single entity to json
-
-    @Test
-    public final void whenSerializing_thenCorrect() throws JsonParseException, IOException {
-        final ObjectMapper mapper = new ObjectMapper();
-        final String dtoAsString = mapper.writeValueAsString(new MyDto());
-
-        assertThat(dtoAsString, containsString("intValue"));
-        assertThat(dtoAsString, containsString("stringValue"));
-        assertThat(dtoAsString, containsString("booleanValue"));
-    }
-
-    @Test
-    public final void givenNameOfFieldIsChangedViaAnnotationOnGetter_whenSerializing_thenCorrect() throws JsonParseException, IOException {
-        final ObjectMapper mapper = new ObjectMapper();
-        final MyDtoFieldNameChanged dtoObject = new MyDtoFieldNameChanged();
-        dtoObject.setStringValue("a");
-
-        final String dtoAsString = mapper.writeValueAsString(dtoObject);
-
-        assertThat(dtoAsString, not(containsString("stringValue")));
-        assertThat(dtoAsString, containsString("strVal"));
-        System.out.println(dtoAsString);
-    }
-
-    // tests - serialize via accessors/fields
-
-    @Test(expected = JsonMappingException.class)
-    public final void givenObjectHasNoAccessors_whenSerializing_thenException() throws JsonParseException, IOException {
-        final String dtoAsString = new ObjectMapper().writeValueAsString(new MyDtoNoAccessors());
-
-        assertThat(dtoAsString, notNullValue());
-    }
-
-    @Test
-    public final void givenObjectHasNoAccessors_whenSerializingWithPrivateFieldsVisibility_thenNoException() throws JsonParseException, IOException {
-        final ObjectMapper objectMapper = new ObjectMapper();
-        objectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
-        final String dtoAsString = objectMapper.writeValueAsString(new MyDtoNoAccessors());
-
-        assertThat(dtoAsString, containsString("intValue"));
-        assertThat(dtoAsString, containsString("stringValue"));
-        assertThat(dtoAsString, containsString("booleanValue"));
-    }
-
-    @Test
-    public final void givenObjectHasNoAccessorsButHasVisibleFields_whenSerializing_thenNoException() throws JsonParseException, IOException {
-        final ObjectMapper objectMapper = new ObjectMapper();
-        final String dtoAsString = objectMapper.writeValueAsString(new MyDtoNoAccessorsAndFieldVisibility());
-
-        assertThat(dtoAsString, containsString("intValue"));
-        assertThat(dtoAsString, containsString("stringValue"));
-        assertThat(dtoAsString, containsString("booleanValue"));
-    }
-
     // tests - multiple entities to json
 
     @Test

jackson/README.md

@@ -11,21 +11,16 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
 - [Jackson – Unmarshall to Collection/Array](https://www.baeldung.com/jackson-collection-array)
 - [Jackson – Custom Serializer](https://www.baeldung.com/jackson-custom-serialization)
 - [Getting Started with Custom Deserialization in Jackson](https://www.baeldung.com/jackson-deserialization)
-- [Jackson Exceptions – Problems and Solutions](https://www.baeldung.com/jackson-exception)
 - [Jackson Date](https://www.baeldung.com/jackson-serialize-dates)
-- [Jackson – Bidirectional Relationships](https://www.baeldung.com/jackson-bidirectional-relationships-and-infinite-recursion)
 - [Jackson JSON Tutorial](https://www.baeldung.com/jackson)
 - [Jackson – Working with Maps and nulls](https://www.baeldung.com/jackson-map-null-values-or-null-key)
 - [Jackson – Decide What Fields Get Serialized/Deserialized](https://www.baeldung.com/jackson-field-serializable-deserializable-or-not)
 - [Jackson vs Gson](https://www.baeldung.com/jackson-vs-gson)
 - [XML Serialization and Deserialization with Jackson](https://www.baeldung.com/jackson-xml-serialization-and-deserialization)
-- [More Jackson Annotations](https://www.baeldung.com/jackson-advanced-annotations)
 - [Inheritance with Jackson](https://www.baeldung.com/jackson-inheritance)
-- [Guide to @JsonFormat in Jackson](https://www.baeldung.com/jackson-jsonformat)
 - [Using Optional with Jackson](https://www.baeldung.com/jackson-optional)
 - [Map Serialization and Deserialization with Jackson](https://www.baeldung.com/jackson-map)
 - [Jackson Streaming API](https://www.baeldung.com/jackson-streaming-api)
-- [Jackson – JsonMappingException (No serializer found for class)](https://www.baeldung.com/jackson-jsonmappingexception)
 - [How To Serialize and Deserialize Enums with Jackson](https://www.baeldung.com/jackson-serialize-enums)
 - [Jackson – Marshall String to JsonNode](https://www.baeldung.com/jackson-json-to-jsonnode)
 - [Jackson – Unmarshall to Collection/Array](https://www.baeldung.com/jackson-collection-array)

jackson/src/test/java/com/baeldung/jackson/exception/User.java

@@ -1,11 +0,0 @@
-package com.baeldung.jackson.exception;
-
-public class User {
-    public int id;
-    public String name;
-
-    public User(final int id, final String name) {
-        this.id = id;
-        this.name = name;
-    }
-}

pom.xml

@@ -499,6 +499,8 @@
                 <module>jackson</module>
                 <module>jackson-2</module>
                 <module>jackson-simple</module>
+                <module>jackson-annotations</module>
+                <module>jackson-exceptions</module>
                 <module>java-collections-conversions</module>
                 <module>java-collections-conversions-2</module>
                 <module>java-collections-maps</module>
@@ -1266,6 +1268,8 @@
                 <module>jackson</module>
                 <module>jackson-2</module>
                 <module>jackson-simple</module>
+                <module>jackson-annotations</module>
+                <module>jackson-exceptions</module>
                 <module>java-collections-conversions</module>
                 <module>java-collections-conversions-2</module>
                 <module>java-collections-maps</module>