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BAEL-5193-Deserialize Snake Case With Jackson (#11341) 

* BAEL-5193-deserialize-snake-case

* refactor

* refactor

Co-authored-by: tienvn4 <tienvn4@ghtk.co>
This commit is contained in:
vunamtien 2021-11-03 16:22:59 +07:00 committed by GitHub
parent 453ca3ea3b
commit 1adb96e384
4 changed files with 118 additions and 0 deletions
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22
jackson-modules/jackson-conversions-2/src/main/java/com/baeldung/jackson/snakecase/User.java Normal file
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package com.baeldung.jackson.snakecase;
public class User {
private String firstName;
private String 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;
}
}

26
jackson-modules/jackson-conversions-2/src/main/java/com/baeldung/jackson/snakecase/UserWithPropertyNames.java Normal file
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package com.baeldung.jackson.snakecase;
import com.fasterxml.jackson.annotation.JsonProperty;
public class UserWithPropertyNames {
@JsonProperty("first_name")
private String firstName;
@JsonProperty("last_name")
private String 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;
}
}

26
jackson-modules/jackson-conversions-2/src/main/java/com/baeldung/jackson/snakecase/UserWithSnakeStrategy.java Normal file
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package com.baeldung.jackson.snakecase;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
public class UserWithSnakeStrategy {
private String firstName;
private String 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;
}
}

44
jackson-modules/jackson-conversions-2/src/test/java/com/baeldung/jackson/snakecase/SnakeCaseUnitTest.java Normal file
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package com.baeldung.jackson.snakecase;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class SnakeCaseUnitTest {
private static final String JSON = "{\"first_name\": \"Jackie\", \"last_name\": \"Chan\"}";
@Test(expected = UnrecognizedPropertyException.class)
public void whenExceptionThrown_thenExpectationSatisfied() throws Exception {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.readValue(JSON, User.class);
}
@Test
public void givenSnakeCaseJson_whenParseWithJsonPropertyAnnotation_thenGetExpectedObject() throws Exception {
ObjectMapper objectMapper = new ObjectMapper();
UserWithPropertyNames user = objectMapper.readValue(JSON, UserWithPropertyNames.class);
assertEquals("Jackie", user.getFirstName());
assertEquals("Chan", user.getLastName());
}
@Test
public void givenSnakeCaseJson_whenParseWithJsonNamingAnnotation_thenGetExpectedObject() throws Exception {
ObjectMapper objectMapper = new ObjectMapper();
UserWithSnakeStrategy user = objectMapper.readValue(JSON, UserWithSnakeStrategy.class);
assertEquals("Jackie", user.getFirstName());
assertEquals("Chan", user.getLastName());
}
@Test
public void givenSnakeCaseJson_whenParseWithCustomMapper_thenGetExpectedObject() throws Exception {
ObjectMapper objectMapper = new ObjectMapper().setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
User user = objectMapper.readValue(JSON, User.class);
assertEquals("Jackie", user.getFirstName());
assertEquals("Chan", user.getLastName());
}
}