jsp第十周作业
package com.gd.entity; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class BaseDao { //获取连接 protected Connection getConnection(){ Connection conn=null; try { Class.forName("com.mysql.jdbc.Driver"); // 2.建立连接 conn = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test?serverTimezone=UTC&useSSL=false","root","123456"); } catch (Exception e) { e.printStackTrace(); } return conn; } //关闭连接 protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){ try { if(rs != null) rs.close(); if(ps != null) ps.close(); if(con != null) con.close(); } catch (SQLException e) { e.printStackTrace(); } } }
package com.gd.entity;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class StuDao extends BaseDao {
public boolean login(String name, String pwd) {
boolean f = false;
Connection conn = getConnection();
String sql = "select * from stu where uname=? and upwd=?";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = conn.prepareStatement(sql);
ps.setString(1, name);
ps.setString(2, pwd);
rs = ps.executeQuery();
if (rs.next())
f = true;
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, rs);
}
return f;
}
public void reg(String uname, String upwd) {
Connection conn = getConnection();
PreparedStatement ps = null;
try {
String sql = "insert into stu(uname,upwd) values(?,?)"; // 2个占位符
// 4.执行SQL语句
ps = conn.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
ps.executeUpdate();// 增删改都用这个
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, null);
}
}
}
<body> <script type="text/javascript"> function validate(){ if(loginForm.uname.value==""){ alert("账号不能为空!"); return; } if(loginForm.upwd1.value==""){ alert("密码不能为空!"); return; } if(loginForm.upwd1.value!=loginForm.upwd2.value){ alert("密码不一致,请重新输入!"); return; } loginForm.submit(); } </script> <form name="loginForm" action="dozhuce.jsp" method="post"> 用户名:<input type="text" name="uname" ><br> 密码: <input type="password" name="upwd1" ><br> 确认密码: <input type="password" name="upwd2" > <input type="button" value="注册" onClick="validate()"> </form> </body> <body> <% StuDao sd=new StuDao(); request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd1"); sd.reg(uname, upwd); session.setAttribute("uname", uname); out.print("注册失败,即将跳回登陆页....."); request.getRequestDispatcher("index.jsp").forward(request, response); %> </body>
<body> <script type="text/javascript"> function validate(){ if(loginForm.uname.value==""){ alert("账号不能为空!"); return; } if(loginForm.upwd.value==""){ alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form name="loginForm" action="dologin.jsp" method="post"> 用户名:<input type="text" name="uname" ><br> 密码: <input type="password" name="upwd" > <input type="button" value="登录" onClick="validate()"> </form> </body> <body> <% StuDao sd=new StuDao(); request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); if (sd.login(uname, upwd)){ session.setAttribute("uname", uname); request.getRequestDispatcher("main.jsp").forward(request, response); }else{ out.print("登陆失败,即将跳回登陆页....."); response.setHeader("refresh", "3;url=index.jsp"); } %> </body> <body> <% request.setCharacterEncoding("utf-8"); String uname=(String)session.getAttribute("uname"); %> 登录成功!欢迎你<%=uname %> </body>