使用xml/json格式传输数据 spring mvc（HttpMessageConverter<T>的使用）

1.导入jar包（除spring之外的几个jar包）

jackson-core-asl-1.4.2.jar

jackson-mapper-asl-1.4.2.jar

xstream-1.4.4.jar

xmlpull_1_0_5.jar

2 .配置文件

先看 spring-mvc的配置文件配置，在配置文件中添加以下内容：

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"   p:messageConverters-ref="messageConverters"/><util:list id="messageConverters"><bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter"/><bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/><bean class="org.springframework.http.converter.StringHttpMessageConverter"/><bean class="org.springframework.http.converter.xml.XmlAwareFormHttpMessageConverter"/><bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/><bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter" p:marshaller-ref="xmlMarshaller"p:unmarshaller-ref="xmlMarshaller" ></bean></util:list>    <bean id="xmlMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller"><property name="streamDriver"><bean class="com.thoughtworks.xstream.io.xml.StaxDriver"/></property><property name="annotatedClasses"><list><value>com.wondersgroup.hs.test.model.User</value></list></property></bean> 

注：如果测试无法成功，配置文件中如果有<mvc:annotation-driven/>,可以尝试删掉它，看能否成功。

3.Controller代码

package com.wondersgroup.hs.test.controller;import org.springframework.http.HttpEntity;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import com.wondersgroup.hs.test.model.User;@Controller@RequestMapping("/hmc")public class HttpMessageConverterController {//共两种方式绑定数据//1.使用ResponseEntity<T>/RequestEntity<T>//@RequestMapping(value="/method1")//public ResponseEntity<User> method1(HttpEntity<User> requestEntity){//User user = requestEntity.getBody();//user.setUserName("111");//return new ResponseEntity<User>(user,HttpStatus.OK);//}//2.使用@ResponseBody/@RequestBody@RequestMapping(value="/method1")@ResponseBodypublic User method1(@RequestBody User user){user.setUserName("111");return user;}}

4.测试

package test.com.wondersgroup.hs.test.controller;import java.io.IOException;import java.util.Collections;import org.junit.Test;import org.springframework.http.HttpEntity;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpMethod;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;import org.springframework.http.converter.xml.MarshallingHttpMessageConverter;import org.springframework.oxm.xstream.XStreamMarshaller;import org.springframework.web.client.RestTemplate;import com.thoughtworks.xstream.io.xml.StaxDriver;import com.wondersgroup.hs.test.model.User;public class HttpMessageConverterControllerTest {@Testpublic void testMethod1() throws IOException{try{RestTemplate restTemplate = buildRestTemplate();User user = new User();user.setUserName("tom");user.setPassword("1234");user.setRealName("汤姆");HttpHeaders entityHeaders = new HttpHeaders();//xml传输entityHeaders.setContentType(MediaType.valueOf("application/xml;UTF-8"));entityHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_XML));//json传输//entityHeaders.setContentType(MediaType.valueOf("application/json;UTF-8"));//entityHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));HttpEntity<User> requestEntity = new HttpEntity<User>(user,entityHeaders);ResponseEntity<User> responseEntity = restTemplate.exchange("http://localhost:8081/SpringmvcDemo/hmc/method1.html", HttpMethod.POST, requestEntity, User.class);User responseUser = responseEntity.getBody();System.out.println(responseUser);//Assert.assertNotNull(responseUser);//Assert.assertEquals("1000", responseUser.getUserName())}catch(Exception e){ e.printStackTrace();}}private RestTemplate buildRestTemplate(){RestTemplate restTemplate = new RestTemplate();XStreamMarshaller xmlMarshaller = new XStreamMarshaller();xmlMarshaller.setStreamDriver(new StaxDriver());xmlMarshaller.setAnnotatedClasses(new Class[]{User.class});MarshallingHttpMessageConverter xmlConverter = new MarshallingHttpMessageConverter();xmlConverter.setMarshaller(xmlMarshaller);xmlConverter.setUnmarshaller(xmlMarshaller);restTemplate.getMessageConverters().add(xmlConverter);MappingJacksonHttpMessageConverter jsonConverter = new MappingJacksonHttpMessageConverter();restTemplate.getMessageConverters().add(jsonConverter);return restTemplate;}}

注意测试代码中的，差异就在这几行代码当中。

//xml传输entityHeaders.setContentType(MediaType.valueOf("application/xml;UTF-8"));entityHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_XML));//json传输//entityHeaders.setContentType(MediaType.valueOf("application/json;UTF-8"));//entityHeaders.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));