java ajax json 前后端数据传输-白红宇的个人博客

发布日期：2021-05-07 00:08:01 浏览次数：17 分类：技术文章

本文共 2861 字，大约阅读时间需要 9 分钟。

传输单个对象

example.java

package example;import servlet.*;import java.io.IOException;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 net.sf.json.JSON;import net.sf.json.JSONObject;/** * Servlet implementation class example */@WebServlet("/example")public class example extends HttpServlet {	private static final long serialVersionUID = 1L;    public example() {        super();    }	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		doPost(request, response);	}	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		people p=new people("张三", "123");				JSONObject obj=new JSONObject();		obj.put("message",p.getMessage());		obj.put("time", p.getTime());				JSONObject firstp=new JSONObject();		firstp.put("obj",obj);				response.getWriter().append(firstp.toString());	}}

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%>
   	    	    	    
   	    
   	    
   Insert title here

web.xml插入如下代码


       
    
     example
        
    
     example.example
      
     
       
    
     example
        
    
     /example/example

传输多个对象

example.java

package example;import servlet.*;import java.io.IOException;import java.util.ArrayList;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 net.sf.json.JSON;import net.sf.json.JSONArray;import net.sf.json.JSONObject;/** * Servlet implementation class example */@WebServlet("/example")public class example extends HttpServlet {	private static final long serialVersionUID = 1L;    public example() {        super();    }	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		doPost(request, response);	}	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {		people p1=new people("zhangsan", "123");		people p2=new people("lisi", "123324345");		people p3=new people("wangwu", "332123");		ArrayList
   
     list=new ArrayList
    
     ();		list.add(p1);		list.add(p2);		list.add(p3);				JSONArray arr=new JSONArray();		for(people p: list)		{			JSONObject obj=new JSONObject();			obj.put("message",p.getMessage());			obj.put("time",p.getTime());			arr.add(obj);		}		response.getWriter().append(arr.toString());	}}

index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%>
   	    	    	    
   	    
   	    
   Insert title here

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