JSP第十次作业
数据库test 中建个表 stu(stuid 主键 自动增长 ，用户名，密码，年龄)
1.设计一个注册页面，实现用户注册功能
2.设计一个登陆页面，实现用户名密码登陆
3.两个页面可以互相超链接
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'register.jsp' starting page</title> </head> <body> <form action="doreg.jsp" method="post"> 用户名:<input type="text" name="uname"><br> 密 码: <input type="password" name="password"> <br> 确认密码: <input type="password" name="password"> <br> 年 龄:<input type="text" name="age"><br> <input type="submit" value="注册"> <a href="login.jsp">登录</a> </form> </body> </html>
package com.gb.zqj;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
public Connection getConnection() {
Connection con = null;
try {
Class.forName("com.mysql.zqj.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");
} catch (Exception e) {
e.printStackTrace();
}
return con;
}
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.gb.zqj;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class StuDao extends BaseDao {
public int Register(String uname, String password, int age) {
int i = -1;
Connection con = getConnection();
String sql = "insert into stu(uname,password,age)values(?,?,?)";
PreparedStatement pred = null;
try {
pred = con.prepareStatement(sql);
pred.setString(1, uname);
pred.setString(2, password);
pred.setInt(3, age);
i = pred.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} finally {
closeAll(con, pred, null);
}
return i;
}
public boolean Login(String uname, String password) {
boolean f=false;
Connection con = getConnection();
String sql = "select * from stu where uname=? and password=?";
PreparedStatement pred = null;
ResultSet resultSet = null;
try {
pred = con.prepareStatement(sql);
pred.setString(1, uname);
pred.setString(2, password);
resultSet = pred.executeQuery();
while (resultSet.next()) {
f=true;
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
closeAll(con, pred, resultSet);
}
return f;
}
}
<%@page import="com.gb.zqj.StuDao"%> <%@page import="javax.xml.bind.ParseConversionEvent"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname = request.getParameter("uname"); String password = request.getParameter("password"); String age = request.getParameter("age"); int age1 = age == null ? -1 : Integer.parseInt(age); StuDao sd=new StuDao(); int i=sd.Register(uname, password, age1); if(i>0){ request.getRequestDispatcher("login.jsp").forward(request, response); }else{ out.print("注册失败"); } %> </body> </html>
<%@page import="com.gb.zqj.StuDao"%> <%@page import="javax.xml.bind.ParseConversionEvent"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname = request.getParameter("uname"); String password = request.getParameter("password"); StuDao sd=new StuDao(); if(sd.Login(uname, password)){ request.getRequestDispatcher("index1.jsp").forward(request, response); }else{ out.print("登陆失败，即将跳回登陆页....."); response.setHeader("refresh", "2;url=login.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8");%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <h1>登录成功</h1> </body> </html>
