第十周作业
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"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<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"><br>
<input type="button"value="登录" onClick="validate()">
<a href="zhuce.jsp">注册</a>
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<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，跳回登陆页.....");
response.setHeader("refresh", "3;url=login.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String id =request.getParameter("stuid");
Integer stuid =Integer.parseInt(id);
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
String upwd1 = request.getParameter("upwd1");
String age =request.getParameter("uage");
Integer uage =Integer.parseInt(age);
if((upwd.equals(upwd1))){
StuDao sd=new StuDao();
sd.reg(stuid, uname, upwd, uage);
out.print("注册成功，跳回登录页.....");
response.setHeader("refresh", "3;url=login.jsp");
}
else{
out.print("两次密码不一致，跳回注册页.....");
response.setHeader("refresh", "3;url=zhuce.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<script type="text/javascript">
function validate(){
if(loginForm.stuid.value==""){
alert("id不能为空!");
return;
}
if(loginForm.uname.value==""){
alert("用户名不能为空!");
return;
}
if(loginForm.upwd.value==""){
alert("密码不能为空!");
return;
}
if(loginForm.upwd1.value==""){
alert("确认密码不能为空!");
return;
}
if(loginForm.uage.value==""){
alert("年龄不能为空!");
return;
}
loginForm.submit();
}
</script>
<form name="loginForm" action="dozhuce.jsp" method="post">
学生id:<input type="number" name="stuid" ><br>
用户名:<input type="text" name="uname" ><br>
密码: <input type="password" name="upwd" ><br>
确认密码: <input type="password" name="upwd1" ><br>
年龄:<input type="number" name="uage" ><br>
<a href="login.jsp">返回登录</a>
<input type="button" value="注册" onClick="validate()">
</form>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> 登录成功 </body> </html>
package com.sjw;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
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", "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.sjw;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
public class StuDao extends BaseDao {
//登录
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;
}
//注册
public void reg(Integer stuid,String uname, String upwd,Integer uage) {
Connection conn = getConnection();
PreparedStatement ps = null;
try {
String sql = "insert into stu(stuid,uname,upwd,uage) values(?,?,?,?)"; // 2个占位符
// 4.执行SQL语句
ps = conn.prepareStatement(sql);
ps.setInt(1, stuid);
ps.setString(2, uname);
ps.setString(3, upwd);
ps.setInt(4, uage);
ps.executeUpdate();// 增删改都用这个
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
closeAll(conn, ps, null);
}
}
}
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