spring mvc返回json格式疑問@ResponseBody

The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().

 

經過排查原來是配置文件方式不同引起的：

首先引入

jackson-core-asl-1.6.4.jar

jackson-mapper-asl-1.6.4.jar

如果是：

<mvc:annotation-driven />

那麼則沒有問題

 

如果把配置換成

 

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

 

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

則會報異常。

那麼需要補充配置

 

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

   <property name="messageConverters">

   <list>

   <ref bean="jsonHttpMessageConverter"/>

   </list>

   </property>

</bean>

<bean id="jsonHttpMessageConverter" 

       class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>

------------------------------------------------------------

package com.controller;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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.pojo.Users;

@Controller
public class JSONController {
    @RequestMapping(value = "getUserListFromServer", method = RequestMethod.GET)
    @ResponseBody
    public Map<String, Object> getUserList() {

        Map<String, Object> modelMap = new HashMap<String, Object>(3);
        modelMap.put("total", "1");
        modelMap.put("data", getUsers());
        modelMap.put("success", "true");
        return modelMap;
    }

    public List<Users> getUsers() {

        List<Users> list = new ArrayList<Users>();
        for (int i = 0; i < 5; i++) {
            Users user = null;
            user = new Users();
            user.setName("Pandy " + i);
            user.setPassword("pandy " + i);
            user.setEmail("[email protected] " + i);
            user.setRemarks("Nothing " + i);
            user.setId(i);
            list.add(user);
        }
        return list;
    }

    @RequestMapping(value = "commitToServer", method = RequestMethod.POST)
    @ResponseBody
    public Map<String, String> addUser(@RequestBody Users user) {
        System.out.println(user.getName());
        Map<String, String> map = new HashMap<String, String>(1);
        map.put("success", "true");
        return map;
    }

}

getFromServer = function() {
    alert("getFromServer");
    $.ajax({
        type : "GET",
        url : "getUserListFromServer.do",
        data : "name=John&location=Boston",
        contentType : 'application/json', //這裏可以不加上,但是要是提交的是json對象字符串的話,必須加上.
        dataType : 'json',//這裏可以不加上,但是要是提交的是json對象字符串的話,必須加上.
        success : function(obj) {
            alert("Data Saved: " + JSON.stringify(obj));
        },
        error: function(obj, s1, s2){
            alert(JSON.stringify(obj));
        },
        complete : function(obj, s1){
            alert("complete:"+s1);
        }
    });
}
commitToServer = function() {
    alert("commitToServer");
    var obj = {};
    obj.name="Pandy";
    obj.email="[email protected]";
    var param = JSON.stringify(obj);
    alert(param);
    $.ajax({
        type : "POST",
        url : "commitToServer.do",
        data : param,
        contentType : 'application/json', //這裏必須要加上.
        dataType : 'json',
        success : function(obj) {
            alert(JSON.stringify(obj));
        },
        error: function(obj, s1, s2){
            alert(JSON.stringify(obj));
        },
        complete : function(obj, s1){
            alert("complete:"+s1);
        }
    });
}