Java解析Json数据

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一、Java解析Json数据

1、JsonObject

使用JsonObject解析只有一条数据的json是非常方便的例如："{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}"

public static void main(String[] args) {
String jsonString ="{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}";
JSONObject json = JSONObject.fromObject(jsonString);
User user = new User();
user.setName(json.getString("name"));
user.setPassword(json.getString("password"));
user.setEmail(json.getString("email"));
System.out.println(user.toString());
}

2、JsonArray

使用JsonArray解析数组数据的json是非常方便的例如："[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"},{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"1435123@qq.com\"}]"

[java] view plain copy
String json = <span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">"[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"},</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"1435123@qq.com\"}</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">]"</span>;  
         JSONArray jsonArray = JSONArray.fromObject(json);  
         ArrayList<User> users = new ArrayList<User>();  
         for (int i = 0; i < jsonArray.size(); i++) {  
             User userM = new User();  
             user.setName(jsonArray.getJSONObject(i).getString("name"));  
             user.setpassword(jsonArray.getJSONObject(i).getString("password"));  
             user.setEmail(jsonArray.getJSONObject(i).getString("email"));  
             users.add(user);  
        }  
         for (User user : users) {  
            System.out.println(user.toString());  
        }  

二、Jsp解析json数据

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>JqueryDemo1</title>
<script src="jquery.js"></script>
<script>

function showData() {
var str='{ "name": "John" }';//json标准格式
var obj = eval('(' + str + ')');
alert( obj.name);

var str2="{ 'name': 'John' }";
var obj2 = eval('(' + str2 + ')');
alert( obj2.name);

var str3='{"GetUserPostByIdResult":{"Age":"33","ID":"2server","Name":"mady"}}';
var obj3 = eval('(' + str3 + ')');
alert( obj3.GetUserPostByIdResult.ID);

var data=" { root: [ {'name':'6200','value':'0'}, {'name':'6101','value':'xa'}, {'name':'6102','value':'beijing'}, {'name':'6103','value':'haerbin'}]}";
var date1=eval('('+data+')');
alert(date1.root[2].name);

　 var last=JSON.stringify(obj);//将JSON对象转化为JSON字符
alert(last);
}

</script>
</head>
<body>
<input id="Button1" type="button" value="Hit Me" onclick="showData()" />

</body>
</html>

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