【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
姓名：
性别：男：女：
年龄：
身高：
体重：
编号：
| 编号 | 姓名 | 性别 | 年龄 | 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
登录后复制
页面如下：
对应的数据库：
相关学习推荐：编程视频
以上是AJAX实现数据的增删改查操作的详细内容。更多信息请关注PHP中文网其他相关文章！
