AJAX实现数据的增删改查操作

【相关文章推荐：ajax视频教程】

创新互联公司是一家集网站建设,临洮企业网站建设,临洮品牌网站建设,网站定制,临洮网站建设报价,网络营销,网络优化,临洮网站推广为一体的创新建站企业，帮助传统企业提升企业形象加强企业竞争力。可充分满足这一群体相比中小企业更为丰富、高端、多元的互联网需求。同时我们时刻保持专业、时尚、前沿，时刻以成就客户成长自我，坚持不断学习、思考、沉淀、净化自己，让我们为更多的企业打造出实用型网站。

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

 
 
 
 
 
 
 编号：

 姓名：

 性别：男：女：

 年龄：
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
 

 身高：

 体重：

 
 

 

 

 
 编号：
 
 

  

  
编号
  
姓名
  
性别
  
年龄
  
身高
  
体重
  
  

  

  

  

  

  

  

  
 
 
 
 

 

 

 编号：
 
 
 

 

 

 编号：

 姓名：

 性别：男：女：

 年龄：
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
 

 身高：

 体重：

 
 
 
 
 

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

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> listmap = new ArrayList<>();
 listmap = MysqlUtil.show(sql, params);
 for(int i =0 ; i
页面如下：
对应的数据库：
相关学习推荐：编程视频
            

            标题名称：AJAX实现数据的增删改查操作            

            URL地址：http://6mz.cn/article/cjehge.html