AJAX实现数据的增删改查操作

coldplay.xixi

发布时间：2020-08-27 16:26:50

4497人浏览过

来源于jb51

转载

AJAX实现数据的增删改查操作

【相关文章推荐：ajax视频教程】

本文实例讲述了AJAX实现数据的增删改查操作。分享给大家供大家参考，具体如下：

主页：index.html

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 <script src="http://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
 </head>
 <body>
 编号：<input type="text" value="" id="pno"/><br>
 姓名：<input type="text" value="" id="name"/><br>
 性别：男：<input type="radio" name="sex" value="男">女：<input type="radio" name="sex" value="女"><br>
 年龄：<select id="age">
  <option value="15">15</option>
  <option value="16">16</option>
  <option value="17">17</option>
  <option value="18">18</option>
  <option value="19">19</option>
  <option value="20">20</option>
  <option value="21">21</option>
  <option value="22">22</option>
  <option value="23">23</option>
  <option value="24">24</option>
  <option value="25">25</option>
 </select><br>
 身高：<input type="text" value="" id="height"/><br>
 体重：<input type="text" value="" id="weight"/><br>
 <input type="button" value="插入" id="btn_1" onclick="submit()"/>
 <br>
 <br>
 <br>
 
 编号：<input type="text" value="" id="pno_query"/>
 <input type="button" value="查询" id="btn_2" onclick="query()"/>
 <table id="queryResult">
  <tr>
  <td>编号</td>
  <td>姓名</td>
  <td>性别</td>
  <td>年龄</td>
  <td>身高</td>
  <td>体重</td>
  </tr>
  <tr>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  <td></td>
  </tr>
 </table>
 
 
 <br>
 <br>
 <br>
 编号：<input type="text" value="" id="pno_del"/>
 <input type="button" value="删除" id="btn_3" onclick="del()"/>
 
 <br>
 <br>
 <br>
 编号：<input type="text" value="" id="pno_up"/><br>
 姓名：<input type="text" value="" id="name_up"/><br>
 性别：男：<input type="radio" name="sex_up" value="男">女：<input type="radio" name="sex_up" value="女"><br>
 年龄：<select id="age_up">
  <option value="15">15</option>
  <option value="16">16</option>
  <option value="17">17</option>
  <option value="18">18</option>
  <option value="19">19</option>
  <option value="20">20</option>
  <option value="21">21</option>
  <option value="22">22</option>
  <option value="23">23</option>
  <option value="24">24</option>
  <option value="25">25</option>
 </select><br>
 身高：<input type="text" value="" id="height_up"/><br>
 体重：<input type="text" value="" id="weight_up"/><br>
 <input type="button" value="更新" id="btn_4" onclick="update()"/>
 
 </body>
 
 <script type="text/javascript">
 /*
 var x = $("#queryResult").html();
 
 for(var i=0; i < 20 ; i++) {
  x += '<tr><td></td><td></td><td></td><td></td><td></td><td></td></tr>';
 }
 $("#queryResult").html(x);*/
 function submit() {
 var pno = $("#pno").val();
 var name = $("#name").val();
 var sex = $('input[name="sex"]:checked').val();
 var age = $("#age").val();
 var height = $("#height").val();
 var weight = $("#weight").val();
 
 var data={
  
  "pno":pno,
  "name":name,
  "sex":sex,
  "age":age,
  "height":height,
  "weight" : weight
 }
 
 
 $.ajax({
  type : "post",
  url : "Hello",
  data : data,
  cache : true,
  async : true,
  success: function (data ,textStatus, jqXHR){
     if(data.code == 200){
      alert("插入成功了");
     }else{
      alert(data.message);
     }
   },
     error:function (XMLHttpRequest, textStatus, errorThrown) {   
      
       alert(typeof(errorThrown));
     }
  
 });
 }
 
 
 function query() {
 
 var pno = $("#pno_query").val(); 
 var str = ["编号","姓名","性别","年龄","身高","体重"];
 $.ajax({
  type : "post",
  url : "HelloQuery",
  data : {
  "pno": pno
  },
  cache : true,
  async : true,
  success: function (data ,textStatus, jqXHR){
  //data = $.parseJSON(data);
  var j = 0;
  var x = 1;
  //for(var i=1; i <20; i++) {
   for(var p in data){//遍历json对象的每个key/value对,p为key
   console.log(data[p]);
   if(j == 6) {
    j = 0;
    x++;
   }
    $("#queryResult tr:eq("+x+") td:eq("+j+")").html(data[p]);
    console.log(data[p]);
    j++;
   }
  //}
  
  
  
     
   },
     error:function (XMLHttpRequest, textStatus, errorThrown) {   
      
       alert(typeof(errorThrown));
     }
  
 });
 }
 
 function del() {
 var pno = $("#pno_del").val(); 
 
 $.ajax({
  type : "post",
  url : "HelloDelete",
  data : {
  "pno": pno
  },
  cache : true,
  async : true,
  success: function (data ,textStatus, jqXHR){
  if(data.code == 200){
      alert("删除成功了");
     }else{
      alert(data.message);
     }
   },
     error:function (XMLHttpRequest, textStatus, errorThrown) {   
      
       alert(typeof(errorThrown));
     }
  
 });
 }
 
 function update() {
 var pno = $("#pno_up").val();
 var name = $("#name_up").val();
 var sex = $('input[name="sex_up"]:checked').val();
 var age = $("#age_up").val();
 var height = $("#height_up").val();
 var weight = $("#weight_up").val();
 
 var data={
  
  "pno":pno,
  "name":name,
  "sex":sex,
  "age":age,
  "height":height,
  "weight" : weight
 }
 
 
 $.ajax({
  type : "post",
  url : "HelloUpdate",
  data : data,
  cache : true,
  async : true,
  success: function (data ,textStatus, jqXHR){
     if(data.code == 200){
      alert("更新成功了");
     }else{
      alert(data.message);
     }
   },
     error:function (XMLHttpRequest, textStatus, errorThrown) {   
      
       alert(typeof(errorThrown));
     }
  
 });
 }
 
 
 
 </script>
</html>

增加的Serlvet：Hello.java

package com.web;
 
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 com.mysql.MysqlUtil;
 
/**
 * Servlet implementation class Hello
 */
@WebServlet("/Hello")
public class Hello extends HttpServlet {
 private static final long serialVersionUID = 1L;
    
  /**
   * @see HttpServlet#HttpServlet()
   */
  public Hello() {
    super();
    // TODO Auto-generated constructor stub
  }
 
 /**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 // TODO Auto-generated method stub
 response.getWriter().append("Served at: ").append(request.getContextPath());
 }
 
 /**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
 response.setCharacterEncoding("utf-8");
 response.setContentType("application/json; charset=utf-8");
 
 String pno = request.getParameter("pno");
 String name = request.getParameter("name");
 String sex = request.getParameter("sex");
 String age = request.getParameter("age");
 String height = request.getParameter("height");
 String weight = request.getParameter("weight");
 
 String sqlInsert = "INSERT INTO Person (Pno,Pname,Psex,Page,Pheight,Pweight) VALUES('";
 sqlInsert += pno +"','";
 sqlInsert += name +"','";
 sqlInsert += sex +"',";
 sqlInsert += age +",";
 sqlInsert += height +",";
 sqlInsert += weight +")";
 
 int message = MysqlUtil.add(sqlInsert);
 String rep = "";
 if(message == 1) {
  rep = "{\"code\":200,\"message\":\"成功插入数据库\"}";
 }else {
  rep = "{\"code\":\"999\",\"message\":\"插入失败了\"}";
 }
 response.getWriter().write(rep);
 
 
 }
 
}

删除的Servlet：HelloDelete.java

package com.web;
 
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 com.mysql.MysqlUtil;
 
/**
 * Servlet implementation class HelloDelete
 */
@WebServlet("/HelloDelete")
public class HelloDelete extends HttpServlet {
 private static final long serialVersionUID = 1L;
    
  /**
   * @see HttpServlet#HttpServlet()
   */
  public HelloDelete() {
    super();
    // TODO Auto-generated constructor stub
  }
 
 /**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 // TODO Auto-generated method stub
 response.getWriter().append("Served at: ").append(request.getContextPath());
 }
 
 /**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 response.setCharacterEncoding("utf-8");
 response.setContentType("application/json; charset=utf-8");
 
 String pno = request.getParameter("pno");
 
 
 String sqlDel = "delete from Person where pno="+pno;
 
 
 int message = MysqlUtil.del(sqlDel);
 String rep = "";
 if(message == 1) {
  rep = "{\"code\":\"200\",\"message\":\"成功删除\"}";
 }else {
  rep = "{\"code\":\"999\",\"message\":\"删除失败\"}";
 }
 response.getWriter().write(rep);
 }
 
}

更新的Servlet：HelloUpdate.java

jQuery实现表格数据增、删、改、查

下载

package com.web;
 
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 com.mysql.MysqlUtil;
 
/**
 * Servlet implementation class HelloUpdate
 */
@WebServlet("/HelloUpdate")
public class HelloUpdate extends HttpServlet {
 private static final long serialVersionUID = 1L;
    
  /**
   * @see HttpServlet#HttpServlet()
   */
  public HelloUpdate() {
    super();
    // TODO Auto-generated constructor stub
  }
 
 /**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 // TODO Auto-generated method stub
 response.getWriter().append("Served at: ").append(request.getContextPath());
 }
 
 /**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 response.setCharacterEncoding("utf-8");
 response.setContentType("application/json; charset=utf-8");
 
 String pno = request.getParameter("pno");
 String name = request.getParameter("name");
 String sex = request.getParameter("sex");
 String age = request.getParameter("age");
 String height = request.getParameter("height");
 String weight = request.getParameter("weight");
 
 String sqlupdate = "update Person set ";
// sqlupdate += "Pno='"+ pno +"',";
 sqlupdate += "Pname='"+ name +"',";
 sqlupdate += "Psex='"+ sex +"',";
 sqlupdate += "Page="+ age +",";
 sqlupdate += "Pheight="+ height +",";
 sqlupdate += "Pweight="+ weight;
 sqlupdate += " where Pno='"+pno+"'";
 System.out.println(sqlupdate);
 int message = MysqlUtil.update(sqlupdate);
 String rep = "";
 if(message == 1) {
  rep = "{\"code\":\"200\",\"message\":\"成功插入数据库\"}";
 }else {
  rep = "{\"code\":\"999\",\"message\":\"插入失败了\"}";
 }
 response.getWriter().write(rep);
 
 }
 
}

查询的Servlet：HelloQuery.java

package com.web;
 
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
 
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 com.mysql.MysqlUtil;
 
/**
 * Servlet implementation class HelloQuery
 */
@WebServlet("/HelloQuery")
public class HelloQuery extends HttpServlet {
 private static final long serialVersionUID = 1L;
    
  /**
   * @see HttpServlet#HttpServlet()
   */
  public HelloQuery() {
    super();
    // TODO Auto-generated constructor stub
  }
 
 /**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 // TODO Auto-generated method stub
 response.getWriter().append("Served at: ").append(request.getContextPath());
 }
 
 /**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 response.setCharacterEncoding("utf-8");
 response.setContentType("application/json; charset=utf-8");
 String pno = request.getParameter("pno");
 String[] params = {"Pno","Pname","Psex","Page","Pheight","Pweight"};
 String sql = "select * from Person where Pno="+pno;
 String data = "{";
 
 String[] str = {"编号","姓名","性别","年龄","身高","体重"};
 List<Map<String,String>> listmap = new ArrayList<>();
 listmap = MysqlUtil.show(sql, params);
 for(int i =0 ; i<listmap.size();i++) {  
  for(int j=0 ; j<listmap.get(i).size();j++) {
  data += "\""+str[j]+"\":"+"\""+listmap.get(i).get(params[j])+"\",";  
  }
 }
 data = data.substring(0, data.length()-1);
 data += "}";
 
 
 System.out.println(data);
 response.getWriter().write(data);
 }
 
 
 
}

页面如下：

对应的数据库：

相关学习推荐：编程视频

JavaScript 中实现动态下拉框价格聚合计算的完整教程

如何在 iCN3D 中正确引入 jQuery 以支持 AJAX 功能

数据库提交失败常见原因及解决方案：FormData 与 AJAX 的正确配合

数据库提交失败常见原因与解决方案：FormData 与 AJAX 的正确配合

数据库提交失败的常见原因与正确处理 FormData 的完整指南

相关专题

Go高并发任务调度与Goroutine池化实践

本专题围绕 Go 语言在高并发任务处理场景中的实践展开，系统讲解 Goroutine 调度模型、Channel 通信机制以及并发控制策略。内容包括任务队列设计、Goroutine 池化管理、资源限制控制以及并发任务的性能优化方法。通过实际案例演示，帮助开发者构建稳定高效的 Go 并发任务处理系统，提高系统在高负载环境下的处理能力与稳定性。

2026.03.10

Kotlin Android模块化架构与组件化开发实践

本专题围绕 Kotlin 在 Android 应用开发中的架构实践展开，重点讲解模块化设计与组件化开发的实现思路。内容包括项目模块拆分策略、公共组件封装、依赖管理优化、路由通信机制以及大型项目的工程化管理方法。通过真实项目案例分析，帮助开发者构建结构清晰、易扩展且维护成本低的 Android 应用架构体系，提升团队协作效率与项目迭代速度。

2026.03.09

JavaScript浏览器渲染机制与前端性能优化实践

本专题围绕 JavaScript 在浏览器中的执行与渲染机制展开，系统讲解 DOM 构建、CSSOM 解析、重排与重绘原理，以及关键渲染路径优化方法。内容涵盖事件循环机制、异步任务调度、资源加载优化、代码拆分与懒加载等性能优化策略。通过真实前端项目案例，帮助开发者理解浏览器底层工作原理，并掌握提升网页加载速度与交互体验的实用技巧。

2026.03.06

Rust内存安全机制与所有权模型深度实践

本专题围绕 Rust 语言核心特性展开，深入讲解所有权机制、借用规则、生命周期管理以及智能指针等关键概念。通过系统级开发案例，分析内存安全保障原理与零成本抽象优势，并结合并发场景讲解 Send 与 Sync 特性实现机制。帮助开发者真正理解 Rust 的设计哲学，掌握在高性能与安全性并重场景中的工程实践能力。

187

2026.03.05

PHP高性能API设计与Laravel服务架构实践

本专题围绕 PHP 在现代 Web 后端开发中的高性能实践展开，重点讲解基于 Laravel 框架构建可扩展 API 服务的核心方法。内容涵盖路由与中间件机制、服务容器与依赖注入、接口版本管理、缓存策略设计以及队列异步处理方案。同时结合高并发场景，深入分析性能瓶颈定位与优化思路，帮助开发者构建稳定、高效、易维护的 PHP 后端服务体系。

339

2026.03.04

AI安装教程大全

2026最全AI工具安装教程专题：包含各版本AI绘图、AI视频、智能办公软件的本地化部署手册。全篇零基础友好，附带最新模型下载地址、一键安装脚本及常见报错修复方案。每日更新，收藏这一篇就够了，让AI安装不再报错！

116

2026.03.04

Swift iOS架构设计与MVVM模式实战

本专题聚焦 Swift 在 iOS 应用架构设计中的实践，系统讲解 MVVM 模式的核心思想、数据绑定机制、模块拆分策略以及组件化开发方法。内容涵盖网络层封装、状态管理、依赖注入与性能优化技巧。通过完整项目案例，帮助开发者构建结构清晰、可维护性强的 iOS 应用架构体系。

180

2026.03.03

C++高性能网络编程与Reactor模型实践

本专题围绕 C++ 在高性能网络服务开发中的应用展开，深入讲解 Socket 编程、多路复用机制、Reactor 模型设计原理以及线程池协作策略。内容涵盖 epoll 实现机制、内存管理优化、连接管理策略与高并发场景下的性能调优方法。通过构建高并发网络服务器实战案例，帮助开发者掌握 C++ 在底层系统与网络通信领域的核心技术。

2026.03.03

Golang 测试体系与代码质量保障：工程级可靠性建设

Go语言测试体系与代码质量保障聚焦于构建工程级可靠性系统。本专题深入解析Go的测试工具链（如go test）、单元测试、集成测试及端到端测试实践，结合代码覆盖率分析、静态代码扫描（如go vet）和动态分析工具，建立全链路质量监控机制。通过自动化测试框架、持续集成（CI）流水线配置及代码审查规范，实现测试用例管理、缺陷追踪与质量门禁控制，确保代码健壮性与可维护性，为高可靠性工程系统提供质量保障。

2026.02.28

热门下载

网站特效

网站源码

网站素材

前端模板