2024/02/02
修改密码：
<%-- Created by IntelliJ IDEA. User: 龚涵彬 Date: 2024/2/3 Time: 16:41 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>新密码</title> </head> <body> <div style="text-align: center"> <form action="updatepwd_servlet" method="post" id="change_pwd"> 账号：<input type="text" value="${code}" name="nameid" readonly><br> <label for="pwd1">请输入新密码：</label><input type="password" name="pwd" id="pwd1"><br> <label for="pwd1">再次确认密码：</label><input type="password" name="p" id="pwd2"><br> <span id="msg" style="font-size: 12px;color:red">${msg}</span><br><br> <button type="button" id="btm">确认</button> </form> <script> document.getElementById("btm").addEventListener("click",function () { var pwd1=document.getElementById("pwd1").value; var pwd2=document.getElementById("pwd2").value; if(!is(pwd1)) { document.getElementById('msg').innerHTML="您的新密码不能为空"; return; } if(!is(pwd2)) { document.getElementById('msg').innerHTML="您再次确认密码不能为空"; return; } if(pwd1.length>20) { document.getElementById('msg').innerHTML="您的新密码长度超过限制"; return; } if(pwd1!==pwd2) { document.getElementById('msg').innerHTML="您的两次密码输入不一致"; return; } document.getElementById("change_pwd").submit(); }) function is(s) { if (s.length===0||s.trim()==="") return false; else return true; } </script> </div> </body> </html>
package com.example.demo; import bean.Base_InformationBean; import bean.InfoDAO; import jakarta.servlet.ServletException; import jakarta.servlet.annotation.WebServlet; import jakarta.servlet.http.HttpServlet; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet(value = "/updatepwd_servlet") public class UpdatePwdServlet extends HttpServlet { private String code; private String password; private Base_InformationBean hhh; public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { code=request.getParameter("nameid"); password=request.getParameter("pwd"); hhh=new Base_InformationBean(); hhh.setCode(code); hhh.setPassword(password); boolean flag= new InfoDAO().updateCode(hhh); request.setAttribute("msg","密码修改完成"); try { request.getRequestDispatcher("index.jsp").forward(request,response); } catch (ServletException e) { throw new RuntimeException(e); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { response.setContentType("text/html"); doGet(request,response); } }
登录后界面
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<div style="text-align: center">
<h1 style="text-align: center;color: red">您已经登录成功</h1>
<jsp:useBean id="Info" class="bean.Base_InformationBean">
<jsp:setProperty name="Info" property="code" value="${sessionScope.User.code}"></jsp:setProperty>
<jsp:setProperty name="Info" property="password" value="密码不能告诉你哟"></jsp:setProperty>
</jsp:useBean>
<p>
<jsp:getProperty name="Info" property="code"/>
</p>
<p>
<jsp:getProperty name="Info" property="password"/>
</p>
<a href="confirm.jsp">修改密码</a>
</div>
</body>
</html>
修改密码的确认密码：
<%-- Created by IntelliJ IDEA. User: 龚涵彬 Date: 2024/2/4 Time: 16:47 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>身份验证</h1> <div style="text-align: center"> <label>您的账号</label><input name="id" readonly value="${sessionScope.User.code}" > <form id="change_pwd" action="confirm-servlet"> <label for="pwd">请输入旧密码</label><input name="pwd" id="pwd" type="text"><br> <span id="msg" style="font-size: 12px;color:red">${msg}</span><br><br> <button type="button" id="btm">确认</button> </form> <script> document.getElementById("btm").addEventListener("click",function () { var pwd=document.getElementById("pwd").value; if(pwd.trim()===""||pwd.length===0) { document.getElementById("msg").innerText="密码不能为空"; return; } document.getElementById("change_pwd").submit(); }) </script> </div> </body> </html>
package com.example.demo; import bean.Base_InformationBean; import bean.InfoDAO; import jakarta.servlet.ServletException; import jakarta.servlet.annotation.WebServlet; import jakarta.servlet.http.HttpServlet; import jakarta.servlet.http.HttpServletRequest; import jakarta.servlet.http.HttpServletResponse; import jakarta.servlet.http.HttpSession; import java.io.IOException; import java.io.PrintWriter; @WebServlet(value="/confirm-servlet") public class ConfirmServlet extends HttpServlet { private String code; private String password; private Base_InformationBean hhh; public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { HttpSession session= request.getSession(); code=((Base_InformationBean)session.getAttribute("User")).getCode(); System.out.println(code); password=request.getParameter("pwd"); hhh=new Base_InformationBean(); hhh.setCode(code); hhh.setPassword(password); boolean flag= new InfoDAO().Login(hhh); if(flag) { request.setAttribute("code",code); try { request.getRequestDispatcher("change_pwd.jsp").forward(request,response); } catch (ServletException e) { throw new RuntimeException(e); } session.removeAttribute("User"); //手动注销 session.invalidate(); } else { request.setAttribute("msg","密码错误"); try { request.getRequestDispatcher("confirm.jsp").forward(request,response); } catch (ServletException e) { throw new RuntimeException(e); } } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { response.setContentType("text/html"); doGet(request,response); } }
Javabean
package bean; public class Base_InformationBean { private String code; private String password; public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
数据库操作：
package bean; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class DBUtil //用于连接数据库 { String name="root"; String password="123456"; public Connection getConnection() { try { Class.forName("com.mysql.cj.jdbc.Driver"); return DriverManager.getConnection("jdbc:mysql://localhost:3306/test",name,password); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } public void closeConnection(Connection conn) { if(conn!=null) try { conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
package bean; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class InfoDAO { public boolean Login(Base_InformationBean baseInformationBean) //登录 { DBUtil db=new DBUtil(); Connection conn=db.getConnection(); String sql="select * from hhh where code=? and password=?"; try { PreparedStatement pstm=conn.prepareStatement(sql); pstm.setString(1,baseInformationBean.getCode()); pstm.setString(2,baseInformationBean.getPassword()); ResultSet rs=pstm.executeQuery(); if(rs.next()) { return true; } } catch (SQLException e) { throw new RuntimeException(e); } return false; } public boolean updateCode(Base_InformationBean baseInformationBean) //修改密码 { DBUtil db=new DBUtil(); Connection conn=db.getConnection(); String sql="update hhh set password=? where code=?"; try { PreparedStatement pstm=conn.prepareStatement(sql); pstm.setString(1,baseInformationBean.getPassword()); pstm.setString(2,baseInformationBean.getCode()); pstm.executeUpdate(); } catch (SQLException e) { throw new RuntimeException(e); } return false; } public boolean findCode(Base_InformationBean baseInformationBean) //查找账号 { DBUtil db=new DBUtil(); Connection conn=db.getConnection(); String sql="select * from hhh where code=?"; try { PreparedStatement pstm=conn.prepareStatement(sql); pstm.setString(1,baseInformationBean.getCode()); ResultSet rs=pstm.executeQuery(); if(rs.next()) { return true; } } catch (SQLException e) { throw new RuntimeException(e); } return false; } public void register(Base_InformationBean baseInformationBean)//注册 { DBUtil db=new DBUtil(); Connection conn=db.getConnection(); String sql="insert into hhh(code,password) values(?,?)"; try { PreparedStatement pstm=conn.prepareStatement(sql); pstm.setString(1,baseInformationBean.getCode()); pstm.setString(2,baseInformationBean.getPassword()); pstm.executeUpdate(); } catch (SQLException e) { throw new RuntimeException(e); } } }
