jar包(Maven仓库):
Spring4 jar包(Maven仓库):
在测试过程中我查看了网上的一些教程,但是那些教程都是在Spring3环境下的,Spring3和Spring4解析json需要的jar文件不同.
在这里贴出Sring3解析json需要的jar
Sring3解析json需要的jar
1,页面获取后端数据
jQuery.ajax( {
type : "GET",
contentType : "application/json",
url : "<%=request.getContextPath()%>/easyui/list.do",
dataType : "json",
success : function(data) {
if (data && data.success == "true") {
$("#info").html("共" + data.total + "条数据。<br/>");
$.each(data.data, function(i, item) {
$("#info").append(
"编号：" + item.id + "，姓名：" + item.username
+ "，年龄：" + item.age);
});
}
},
error : function() {
alert("error")
}
});
jqunery ajax get 向controller请求数据contentType : "application/json", json格式,url为请求的地址,请求成功之后json数据添加到页面
@RequestMapping(value = "/list", method = RequestMethod.GET,consumes="application/json")
@ResponseBody
public Map<String, Object> getUserList() {
List<UserModel> list = new ArrayList<UserModel>();
UserModel um = new UserModel();
um.setId("1");
um.setUsername("sss");
um.setAge(222);
list.add(um);
Map<String, Object> modelMap = new HashMap<String, Object>(3);
modelMap.put("total", "1");
modelMap.put("data", list);
modelMap.put("success", "true"); return modelMap;
}
@ResponseBody 表示自动将页面json数据封装进对象只在contentType : "application/json",情况下允许.
2.向后端发送页面数据
//将一个表单的数据返回成JSON字符串
$.fn.serializeObject = function() {
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name]) {
if (!o[this.name].push) {
o[this.name] = [ o[this.name] ];
}
o[this.name].push(this.value || '');
} else {
o[this.name] = this.value || '';
}
});
return o;
};
$("#submit").click(function() {
var jsonuserinfo = $.toJSON($("#form").serializeObject()); //$.toJSON($("#form")是 jqunery.json.js中的方法
alert(jsonuserinfo); jQuery.ajax( { type : "POST", //contentType: "application/json; charset=utf-8", contentType : 'application/json', url : "<%=request.getContextPath()%>/easyui/add.do", data : jsonuserinfo, dataType : "json", success : function(data) { alert("新增成功！"); }, error : function(data) { alert("error") } }); });
serializeObject()方法将表单内容转换成json字符串,jqunery的json对象和json字符串之间的转换也许需要jqunery插件包
jquery.json-2.2.min.js jquery提供的json包
json2.js json官网提供的json包
var obj = JSON.parse(jsonuserinfo); //字符串转json对象,json2.js中的方法
var c = JSON.stringify(obj); //json对象转字json符串,json2.js中的方法
json对象和字符串的转换有很多种方式,具体的可以看其他的教程.
@RequestMapping(value = "/add", method = RequestMethod.POST,consumes="application/json")
@ResponseBody
public Map<String, String> addUser(@RequestBody UserModel model) {
//System.out.println(123);
int s = model.getAge();
String ss = model.getId();
String sss = model.getUsername();
TestUtil.test(s+ss+sss); Map<String, String> map = new HashMap<String, String>(1);
map.put("success", "true");
return map;
}
@ResponseBody会自动将页面发送的json字符串解析成java对象,其实json对象底层就是map集合对象,java提供了工具可以将map集合转换成json对象,当然json对象和json数组的概念还是需要大家花费一些时间理解的 以下是全部代码:
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.util.*,java.sql.*" errorPage="" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<base href="<%=basePath%>"> <title>Spring MVC</title>
<script src="${pageContext.request.contextPath}/static/editormd/examples/js/jquery.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/static/js/jquery.json-2.2.min.js"></script>
<script type="text/javascript">
//将一个表单的数据返回成JSON对象
$.fn.serializeObject = function() {
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name]) {
if (!o[this.name].push) {
o[this.name] = [ o[this.name] ];
}
o[this.name].push(this.value || '');
} else {
o[this.name] = this.value || '';
}
});
return o;
}; $(document).ready(function() {
jQuery.ajax( {
type : "GET",
contentType : "application/json",
url : "<%=request.getContextPath()%>/easyui/list.do",
dataType : "json",
success : function(data) {
if (data && data.success == "true") {
$("#info").html("共" + data.total + "条数据。<br/>");
$.each(data.data, function(i, item) {
$("#info").append(
"编号：" + item.id + "，姓名：" + item.username
+ "，年龄：" + item.age);
});
}
},
error : function() {
alert("error")
}
});
$("#submit").click(function() {
var jsonuserinfo = $.toJSON($("#form").serializeObject());
alert(typeof jsonuserinfo);
jQuery.ajax( {
type : "POST",
//contentType: "application/json; charset=utf-8",
contentType : 'application/json', url : "<%=request.getContextPath()%>/easyui/add.do",
data : jsonuserinfo,
dataType : "json",
success : function(data) {
alert("新增成功！");
},
error : function(data) {
alert("error")
}
});
});
});
</script>
</head>
<body>
<div id="info"></div>
<form action="<%=request.getContextPath()%>/easyui/add.do" method="post" id="form">
编号：<input type="text" name="id" value="12"/>
姓名：<input type="text" name="username" value="走走走"/>
年龄：<input type="text" name="age" value="44"/> <input type="button" value="提交" id="submit"/>
</form>
</body>
</html>
HTML代码
/**
*
* Spring4 json test start -------------------------------
* @return
*/
@RequestMapping(value = "/list", method = RequestMethod.GET,consumes="application/json")
@ResponseBody
public Map<String, Object> getUserList() {
TestUtil.test("123"); List<UserModel> list = new ArrayList<UserModel>();
UserModel um = new UserModel();
um.setId("1");
um.setUsername("sss");
um.setAge(222);
list.add(um);
Map<String, Object> modelMap = new HashMap<String, Object>(3);
modelMap.put("total", "1");
modelMap.put("data", list);
modelMap.put("success", "true"); return modelMap;
} /**
* Spring4 json test
* @return
*/
@RequestMapping(value = "/add", method = RequestMethod.POST,consumes="application/json")
@ResponseBody
public Map<String, String> addUser(@RequestBody UserModel model) {
//System.out.println(123);
int s = model.getAge();
String ss = model.getId();
String sss = model.getUsername();
TestUtil.test(s+ss+sss); Map<String, String> map = new HashMap<String, String>(1);
map.put("success", "true");
return map;
}
Java代码
package com.zlay.pojo;
public class UserModel{
/**
*
* Spring4 json test class
* @return
*/
private String id;
private String username;
private int age ;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
UserModel类