用jsp做网上投票系统 代码
- 提问者网友：愿为果
- 2021-04-15 12:39
- 五星知识达人网友：鸠书
- 2021-04-15 13:18
- 1楼网友：西岸风
- 2021-04-15 14:55
我之前做过类似的投票小项目，在这里把源码发给你。你自己好好的参考一下。
--------------------------
package com.tv.bean;
public class TVBean { private String tvName; private int tvCount; public String getTvName() { return tvName; } public void setTvName(String tvName) { this.tvName = tvName; } public int getTvCount() { return tvCount; } public void setTvCount(int tvCount) { this.tvCount = tvCount; } }
------------------------------
package com.tv.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList;
import com.tv.bean.TVBean;
public class DBUtil { private Connection con; private PreparedStatement ps = null; private ResultSet rs; public void getCon(){ try { Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=TV","sa",""); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } } public void closeCon(){ try { if(rs !=null) rs.close(); if(ps != null) ps.close(); if(con != null) con.close(); } catch (SQLException e) { e.printStackTrace(); } } public ArrayList getAll(){ ArrayList al = new ArrayList(); this.getCon(); String sql = "select * from TVInfo order by tvCount desc"; try { ps = con.prepareStatement(sql); rs = ps.executeQuery(); while(rs.next()){ TVBean tb = new TVBean(); tb.setTvName(rs.getString(1)); tb.setTvCount(rs.getInt(2)); al.add(tb); } } catch (SQLException e) { e.printStackTrace(); } finally { this.closeCon(); } return al; } public boolean updateByName(String name){ this.getCon(); String sql = "update TVInfo set tvCount=tvCount+1 where tvName='"+name+"'"; try { ps = con.prepareStatement(sql); int i = ps.executeUpdate(); if(i > 0) return true; else return false; } catch (SQLException e) { e.printStackTrace(); return false; } finally { this.closeCon(); } } } ---------------------------------------
package com.tv.servlet;
import java.io.IOException; import java.util.ArrayList;
import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession;
import com.tv.dao.DBUtil;
public class VoteServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); DBUtil dao = new DBUtil(); String [] name = request.getParameterValues("tvs"); int num = name.length; for(int i =0; i < num; i++){ if(dao.updateByName(name[i])){ request.setAttribute("to", "投票成功！"); ArrayList al = dao.getAll(); HttpSession session = request.getSession(); session.setAttribute("al", al); request.getRequestDispatcher("success.jsp").forward(request, response); }else{ request.setAttribute("to", "投票失败！请重新再试！"); } } }
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } } -----------------------------------
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib prefix="c" uri=" http://java.sun.com/jsp/jstl/core"%>
<html> <head> <title>电视投票</title> </head>
<body> <center> <form action="vote" method="post"> <table border="1" align="center"> <tr align="center"> <td> <h2> 选择您最喜欢的电视剧并投上一票 </h2> </td> </tr> <tr> <td> <input type="checkbox" name="tvs" value="咏春" /> 咏春 </td> </tr> <tr> <td> <input type="checkbox" name="tvs" value="金婚" /> 金婚 </td> </tr> <tr> <td> <input type="checkbox" name="tvs" value="士兵突击" /> 士兵突击 </td> </tr> <tr> <td> <input type="checkbox" name="tvs" value="少年张三丰" /> 少年张三丰 </td> </tr> <tr> <td align="center"> <input type="submit" value=" 提交 " /> <input type="reset" value=" 重置 " /> </td> </tr> </table> </form> </center> </body> </html>
-------------------------------------
第一段代码为JavaBean；第二段代码为数据库连接类；第三段代码为Servlet控制类；第四段代码为JSP显示页面。希望能够解决你的问题！