示例实现

1. 请求REST接口返回类转换的JSON或XML数据

2. POST JSON数据到REST接口自动转为类数据

服务端

Bean

package com.qunar.bean;import javax.xml.bind.annotation.XmlAccessType;import javax.xml.bind.annotation.XmlAccessorType;import javax.xml.bind.annotation.XmlRootElement;/** * Created with IntelliJ IDEA. * User: zhenwei.liu * Date: 13-7-26 * Time: 下午6:53 * To change this template use File | Settings | File Templates. */@XmlRootElement // 标注类名为XML根节点@XmlAccessorType(XmlAccessType.FIELD)   // 表示将所有域作为XML节点public class User {    private long id;    private String username;    private String password;    public long getId() {        return id;    }    public void setId(long id) {        this.id = id;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }}

 

Controller

package com.qunar.controller;import com.qunar.bean.User;import org.springframework.http.HttpStatus;import org.springframework.stereotype.Controller;import org.springframework.stereotype.Repository;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.*;/** * Created with IntelliJ IDEA. * User: zhenwei.liu * Date: 13-7-26 * Time: 下午6:54 * To change this template use File | Settings | File Templates. */@Controller@RequestMapping("/users")public class UserController {    // headers属性标明该方法只接受该Accept头的请求    @RequestMapping(value = "/{id}",            method = RequestMethod.GET)//            headers = {"Accept=text/xml, application/json, application/xml"})    // @ResponseBody 表示返回的对象将转换为客户端Accept头要求的表达形式    // 假如客户端请求头没包含任何形式,则假设客户端可接受任何形式的返回    // 返回的类型匹配方法默认值是先查看URL扩展名,没有扩展名则匹配Accept头,否则匹配defaultContentType    // @PathVariable 表示参数值来自URL,如果参数名与URL括号内形参相同    // 可以省略PathVariable内的参数名    public    @ResponseBody    User getUser(@PathVariable("id") long id) {        User user = new User();        user.setUsername("root");        user.setPassword("root123");        user.setId(id);        return user;    }    // 设置RequestMapping的headers参数标明请求体的内容是json数据    @RequestMapping(value = "/add", method = RequestMethod.POST,            headers = "Content-Type=application/json")    // @ResponseStatus表示响应状态 NO_CONTENT表示无响应内容    @ResponseStatus(HttpStatus.NO_CONTENT)    // 没有配置ViewResolver的情况下@ResponseBody不能省略,否则404    // @RequestBody表示将请求体的数据转为user类    public @ResponseBody void addUser(@RequestBody User user) {        System.out.println(user.getId() + "|" + user.getUsername());    }}

 

dispatcher-servlet.xml

     
         
          
              
           
          
          
          
          
          
          
              
                   
                        
                         
                         
                         
                         
                         
                     
                
           
          
          
          
              
               
           
          
              
               
                   
                        
         
          com.qunar.bean.User
                     
                
           
      
     

 

applicationContext.xml

 

 

web.xml

     
         
          
              
       
        webAppRootKey
               
       
        restServer.root
           
          
              
       
                    org.springframework.web.util.WebAppRootListener        
           
          
          
              
       
        contextConfigLocation
               
       
                    classpath*:spring/context/applicationContext.xml        
           
          
              
       
        org.springframework.web.context.ContextLoaderListener
           
          
          
              
       
        org.springframework.web.context.ContextCleanupListener
           
          
              
       
        dispatcher
               
       
        org.springframework.web.servlet.DispatcherServlet
               
                   
        
         contextConfigLocation
                    
        
         classpath*:spring/context/dispatcher-servlet.xml
                
               
       
        1
           
          
              
       
        dispatcher
               
       
        /
           
      
     

 

 

另外很重要的是把依赖包配好,否则各种ClassNotDefined

             
                 
      
       org.codehaus.jackson
                  
      
       jackson-mapper-asl
                  
      
       1.9.12
              
             
             
                 
      
       org.springframework
                  
      
       spring-oxm
                  
      
       3.1.4.RELEASE
              
     

 

客户端

import org.springframework.http.HttpEntity;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpMethod;import org.springframework.http.MediaType;import org.springframework.util.LinkedMultiValueMap;import org.springframework.util.MultiValueMap;import org.springframework.web.client.RestTemplate;/** * Created with IntelliJ IDEA. * User: zhenwei.liu * Date: 13-7-26 * Time: 下午10:41 * To change this template use File | Settings | File Templates. */public class Test {    public static String urlGet = "http://localhost:8080/users/{id}";    public static String urlPost = "http://localhost:8080/users/add";    public static RestTemplate rt = new RestTemplate();    // 从Rest接口获取数据    public static void getUser(long userId) {        HttpHeaders headers = new HttpHeaders();        // 设置Accept表示浏览器支持的MIME类型,此处意思是要返回的类型        headers.setAccept(MediaType.parseMediaTypes(MediaType.APPLICATION_XML_VALUE));        HttpEntity

输出数据

<200 OK,<?xml version="1.0" encoding="UTF-8" standalone="yes"?><user><id>1</id><username>root</username><password>root123</password></user>,{Server=[Apache-Coyote/1.1], Content-Type=[application/xml], Transfer-Encoding=[chunked], Date=[Sat, 27 Jul 2013 16:02:04 GMT]}>

{"id":1,"username":"root","password":"root123"}