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Move and Update Rest and Http Message Converter Article: 

moved code (mostly commented out)
changed readme file
added spring boot exampel simply adding bean, for xml too
This commit is contained in:
Ger Roza 2019-02-19 16:23:44 -03:00
parent 6c237aaf3a
commit 578d35d25d
10 changed files with 101 additions and 43 deletions
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1
spring-boot-rest/README.md
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@ -6,3 +6,4 @@ Module for the articles that are part of the Spring REST E-book:
4. [Build a REST API with Spring and Java Config](http://www.baeldung.com/building-a-restful-web-service-with-spring-and-java-based-configuration)
5. [HATEOAS for a Spring REST Service](http://www.baeldung.com/rest-api-discoverability-with-spring)
6. [REST API Discoverability and HATEOAS](http://www.baeldung.com/restful-web-service-discoverability)
7. [Http Message Converters with the Spring Framework](http://www.baeldung.com/spring-httpmessageconverter-rest)

19
spring-boot-rest/pom.xml
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@ -25,16 +25,26 @@
<groupId>com.fasterxml.jackson.dataformat</groupId>
<artifactId>jackson-dataformat-xml</artifactId>
</dependency>
<!-- We'll need to comment out the jackson-dataformat-xml dependency if we want to use XStream: -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>${xstream.version}</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependency>
<!-- util -->
<dependency>
@ -67,5 +77,6 @@
<properties>
<start-class>com.baeldung.SpringBootRestApplication</start-class>
<guava.version>27.0.1-jre</guava.version>
<xstream.version>1.4.11.1</xstream.version>
</properties>
</project>

3
spring-boot-rest/src/main/java/com/baeldung/persistence/model/Foo.java
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@ -8,6 +8,9 @@ import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import com.thoughtworks.xstream.annotations.XStreamAlias;
@XStreamAlias("Foo")
@Entity
public class Foo implements Serializable {

41
spring-boot-rest/src/main/java/com/baeldung/spring/WebConfig.java
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@ -1,10 +1,49 @@
package com.baeldung.spring;
import java.util.List;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.http.converter.xml.MarshallingHttpMessageConverter;
import org.springframework.oxm.xstream.XStreamMarshaller;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
// If we want to enable xml configurations for message-converter:
// @ImportResource("classpath:WEB-INF/api-servlet.xml")
public class WebConfig implements WebMvcConfigurer {
// @Override
// public void configureMessageConverters(final List<HttpMessageConverter<?>> messageConverters) {
// messageConverters.add(new MappingJackson2HttpMessageConverter());
// messageConverters.add(createXmlHttpMessageConverter());
// }
//
// private HttpMessageConverter<Object> createXmlHttpMessageConverter() {
// final MarshallingHttpMessageConverter xmlConverter = new MarshallingHttpMessageConverter();
//
// final XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
// xstreamMarshaller.setAutodetectAnnotations(true);
// xmlConverter.setMarshaller(xstreamMarshaller);
// xmlConverter.setUnmarshaller(xstreamMarshaller);
//
// return xmlConverter;
// }
// Another possibility is to create a bean which will be automatically added to the Spring Boot Autoconfigurations
// @Bean
// public HttpMessageConverter<Object> createXmlHttpMessageConverter() {
// final MarshallingHttpMessageConverter xmlConverter = new MarshallingHttpMessageConverter();
//
// final XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
// xstreamMarshaller.setAutodetectAnnotations(true);
// xmlConverter.setMarshaller(xstreamMarshaller);
// xmlConverter.setUnmarshaller(xstreamMarshaller);
//
// return xmlConverter;
// }
}

41
spring-boot-rest/src/main/resources/WEB-INF/api-servlet.xml Normal file
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@ -0,0 +1,41 @@
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- We have to exclude Spring Boot's WebMvcAutoConfiguration if we want the xml-configured message-converters to work properly -->
<!-- <mvc:annotation-driven> -->
<!-- <mvc:message-converters -->
<!-- register-defaults="true"> -->
<!-- <bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter"> -->
<!-- <property name="marshaller" ref="xstreamMarshaller" /> -->
<!-- <property name="unmarshaller" ref="xstreamMarshaller" /> -->
<!-- </bean> -->
<!-- <bean -->
<!-- class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /> -->
<!-- </mvc:message-converters> -->
<!-- </mvc:annotation-driven> -->
<!-- <bean id="xstreamMarshaller" -->
<!-- class="org.springframework.oxm.xstream.XStreamMarshaller"> -->
<!-- <property name="autodetectAnnotations" value="true" /> -->
<!-- </bean> -->
<!-- -->
<!-- Also, we can JUST add a HttpMessageConverter Bean to the existing Spring Boot Autoconfiguration: -->
<!-- <bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter"> -->
<!-- <property name="marshaller" ref="xstreamMarshaller" /> -->
<!-- <property name="unmarshaller" ref="xstreamMarshaller" /> -->
<!-- </bean> -->
<!-- <bean id="xstreamMarshaller" -->
<!-- class="org.springframework.oxm.xstream.XStreamMarshaller"> -->
<!-- <property name="autodetectAnnotations" value="true" /> -->
<!-- </bean> -->
</beans>

1
spring-rest/README.md
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@ -5,7 +5,6 @@ The "REST With Spring" Classes: http://bit.ly/restwithspring
### Relevant Articles:
- [Spring @RequestMapping](http://www.baeldung.com/spring-requestmapping)
- [Http Message Converters with the Spring Framework](http://www.baeldung.com/spring-httpmessageconverter-rest)
- [Returning Custom Status Codes from Spring Controllers](http://www.baeldung.com/spring-mvc-controller-custom-http-status-code)
- [A Guide to OkHttp](http://www.baeldung.com/guide-to-okhttp)
- [Binary Data Formats in a Spring REST API](http://www.baeldung.com/spring-rest-api-with-binary-data-formats)

11
spring-rest/pom.xml
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@ -52,10 +52,6 @@
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
@ -86,12 +82,6 @@
<artifactId>jackson-dataformat-xml</artifactId>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>${xstream.version}</version>
</dependency>
<!-- util -->
<dependency>
<groupId>com.google.guava</groupId>
@ -281,7 +271,6 @@
<protobuf-java-format.version>1.4</protobuf-java-format.version>
<protobuf-java.version>3.1.0</protobuf-java.version>
<commons-lang3.version>3.5</commons-lang3.version>
<xstream.version>1.4.9</xstream.version>
<!-- util -->
<guava.version>20.0</guava.version>

14
spring-rest/src/main/java/com/baeldung/sampleapp/config/WebConfig.java
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@ -8,8 +8,6 @@ import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.http.converter.xml.MarshallingHttpMessageConverter;
import org.springframework.oxm.xstream.XStreamMarshaller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@ -33,22 +31,12 @@ public class WebConfig implements WebMvcConfigurer {
.dateFormat(new SimpleDateFormat("dd-MM-yyyy hh:mm"));
messageConverters.add(new MappingJackson2HttpMessageConverter(builder.build()));
// messageConverters.add(new MappingJackson2XmlHttpMessageConverter(builder.createXmlMapper(true).build()));
// messageConverters.add(createXmlHttpMessageConverter());
// messageConverters.add(new MappingJackson2HttpMessageConverter());
// messageConverters.add(new ProtobufHttpMessageConverter());
}
private HttpMessageConverter<Object> createXmlHttpMessageConverter() {
final MarshallingHttpMessageConverter xmlConverter = new MarshallingHttpMessageConverter();
final XStreamMarshaller xstreamMarshaller = new XStreamMarshaller();
xmlConverter.setMarshaller(xstreamMarshaller);
xmlConverter.setUnmarshaller(xstreamMarshaller);
return xmlConverter;
}
*/
}

3
spring-rest/src/main/java/com/baeldung/sampleapp/web/dto/Foo.java
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@ -1,8 +1,5 @@
package com.baeldung.sampleapp.web.dto;
import com.thoughtworks.xstream.annotations.XStreamAlias;
@XStreamAlias("Foo")
public class Foo {
private long id;
private String name;

10
spring-rest/src/main/webapp/WEB-INF/api-servlet.xml
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@ -10,21 +10,11 @@
<mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" >
<mvc:message-converters register-defaults="true">
<!--
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
<bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
<property name="marshaller" ref="xstreamMarshaller" />
<property name="unmarshaller" ref="xstreamMarshaller" />
</bean>
-->
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>
<!-- <bean class="org.springframework.http.converter.protobuf.ProtobufHttpMessageConverter"/> -->
</mvc:message-converters>
</mvc:annotation-driven>
<bean id="xstreamMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller" />
<!-- -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" />
<bean class="org.springframework.web.servlet.view.XmlViewResolver">