spring-mvc.xml:

<beans 
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    >
<mvc:annotation-driven/>

js代碼：

$.post("${pageContext.request.contextPath}/getJson",{},function(data){                 
    alert(JSON.stringify(data));
});

java代碼：

@RequestMapping("/getJson")
@ResponseBody
 
public List<User> getJson(){
    List<User> list = new ArrayList<User>();
    User user1 = new User(10, "劉德華", 45);
    User user2 = new User(12, "張學友", 46);
    list.add(user1);
    list.add(user2);
    return list;
}

導入jackson的Jar包

@ResponseBody將集合數據轉換為json格式並返回給客戶端