jQuery+json makes Ajax calling function (with code)

This time I will bring you jQuery json to make Ajax calling function (with code). What are the precautions for jQuery json to make Ajax calling function. The following is a practical case, let’s take a look.

Userservlet.java code:

package com.iss.servlet;
import org.json.JSONException;
import org.json.JSONObject;
import com.iss.pojo.User;
import com.iss.util.JSONUtil;
public class UserServlet extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  doPost(request, response);
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  response.setContentType("text/html;charset=utf-8");
  //list 添加对象
  List userList = new ArrayList();
  User user1 = new User("张三", "男", "18");
  User user2 = new User("李四", "男", "19");
  User user3 = new User("王五", "男", "20");
  userList.add(user1);
  userList.add(user2);
  userList.add(user3);
  PrintWriter out = response.getWriter();
  String str = null;
  try {
   //帐号密码如果匹配则把list 返回给界面
   if (request.getParameter("userName").equals("jquery")
     && request.getParameter("password").equals("ajax")) {
    str = JSONObject.quote(JSONUtil.toJSONString(userList));
   }
   out.print(str);
  } catch (JSONException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  System.out.println("str "+str);
  out.flush();
  out.close();
 }
}

Html code:

 帐号 jquery 密码 ajax
 

  

   

    帐号
    
   
   

    密码
    
   
   

    
   
  
 
 查询到的数据
 

 
 

UserServlet Remember to import the tool class JSONStringObject JSONUtil

jsp To import jquery.js and json .js

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of python reading and writing json files (with code)

Case using JSONP induction

The above is the detailed content of jQuery+json makes Ajax calling function (with code). For more information, please follow other related articles on the PHP Chinese website!