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"%>
<%
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>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<form action="zc.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="jump.jsp">登录</a>
</form>
</body>
</html>
<%@page import="ymz.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 PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'jump.jsp' starting page</title>
</head>
<body>
<%
String uname = request.getParameter("uname");
String password = request.getParameter("password");
StuDao sd=new StuDao();
if(sd.Login(uname, password)){
request.getRequestDispatcher("main.jsp").forward(request, response);
}else{
out.print("登陆失败，即将跳回登陆页.....");
response.setHeader("refresh", "2;url=index.jsp");
}
%>
</body>
</html>
<%@ 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>
<base href="<%=basePath%>">
<title>My JSP 'main.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<h1>登录成功</h1>
</body>
</html>
<%@page import="ymz.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 PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'zc.jsp' starting page</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("index.jsp").forward(request, response);
}else{
out.print("注册失败");
}
%>
</body>
</html>
package ymz;
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","admin");
} 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 ymz;
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;
}
}
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