<!-- json -->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-core-lgpl</artifactId>
      <version>1.8.1</version>
    </dependency>

    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-lgpl</artifactId>
      <version>1.8.1</version>
    </dependency>

  var cfg =   {
    type: 'POST', 
    data: JSON.stringify({userName:'winzip',password:'password',mobileNO:'13818881888'}), 
    dataType: 'json',
    contentType:'application/json;charset=UTF-8',    
    success: function(result) { 
      alert(result.success); 
    } 
  };

function doTestJson(actionName){
  cfg.url = actionName;
  $.ajax(cfg);
}

  @RequestMapping("/json1")
  @ResponseBody
  public JsonResult testJson1(@RequestBody User u){
    log.info("get json input from request body annotation");
    log.info(u.getUserName());
    return new JsonResult(true,"return ok");
}

  @RequestMapping("/json2")  
  public ResponseEntity<JsonResult> testJson2(HttpEntity<User> u){
    log.info("get json input from HttpEntity annotation");
    log.info(u.getBody().getUserName());
    ResponseEntity<JsonResult> responseResult = new ResponseEntity<JsonResult>( new JsonResult(true,"return ok"),HttpStatus.OK);
    return responseResult;
}

  <bean
    class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1" />
    <property name="mediaTypes">
      <map>
        <entry key="json" value="application/json" />
      </map>
    </property>
    <property name="defaultViews">
      <list>
        <bean
          class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
      </list>
    </property>
    <property name="ignoreAcceptHeader" value="true" />
  </bean>

  @RequestMapping("/json3.json")
  public JsonResult testJson3(@RequestBody User u){
    log.info("handle json output from ContentNegotiatingViewResolver");
    return new JsonResult(true,"return ok");
  }

  protected Object filterModel(Map<String, Object> model) { 
    Map<?, ?> result = (Map<?, ?>) super.filterModel(model); 
    if (result.size() == 1) { 
      return result.values().iterator().next(); 
    } else { 
      return result; 
    } 
  } 

<bean
    class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1" />
    <property name="mediaTypes">
      <map>
        <entry key="json" value="application/json" />
      </map>
    </property>
    <property name="defaultViews">
      <list>
        <bean
          class="net.zhepu.json.MappingJacksonJsonView" />
      </list>
    </property>
    <property name="ignoreAcceptHeader" value="true" />
  </bean>