JSON
JavaScript Object Notation，⼀种轻量级数据交互格式，完成 js 与 Java 等后端开发语⾔对象数据之间的转换。
客户端和服务器之间传递对象数据，需要用JSON格式。
package com.southwind.entity;
public class User {
private Integer id;
private String name;
private Double score;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getScore() {
return score;
}
public void setScore(Double score) {
this.score = score;
}
public User(Integer id, String name, Double score) {
this.id = id;
this.name = name;
this.score = score;
}
}
User user = new User(1,"张三",96.5);
var user = {
id:1,
name:"张三",
score:96.5
}
package com.southwind.servlet;
import com.southwind.entity.User;
import net.sf.json.JSONObject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/test")
public class TestServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
User user = new User(1,"张三",96.5);
//将 Java 对象转为 JSON 格式
resp.setCharacterEncoding("UTF-8");
JSONObject jsonObject = JSONObject.fromObject(user);
resp.getWriter().write(jsonObject.toString());
}
}
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
$(function(){
var btn = $("#btn");
btn.click(function(){
$.ajax({
url:'/test',
type:'post',
dataType:'json',
success:function(data){
$("#id").val(data.id);
$("#name").val(data.name);
$("#score").val(data.score);
}
});
});
})
</script>
</head>
<body>
编号：<input id="id" type="text"/><br/>
姓名：<input id="name" type="text"/><br/>
成绩：<input id="score" type="text"/><br/>
<input id="btn" type="button" value="提交"/>
</body>
</html>
在开发微信小程序的时候，基本上使用的都是JSON语言
所以看了看JSON的格式以及基本用法