JSP第八次作业
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'register.jsp' starting page</title>
</head>
<body>
<form action="2.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="3.jsp">登录</a>
</form>
</body>
</html>
<%@page import="mld.StuDao"%>
<%@page import="javax.xml.bind.ParseConversionEvent"%>
<%@page language="java" import="java.util.*" pageEncoding="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("1.jsp").forward(request, response);
}else{
out.print("注册失败");
}
%>
</body>
</html>
<%@page import="mld.StuDao"%>
<%@page import="javax.xml.bind.ParseConversionEvent"%>
<%@page language="java" import="java.util.*" pageEncoding="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("4.jsp").forward(request, response);
}else{
out.print("登陆失败，即将跳回登陆页.....");
response.setHeader("refresh", "2;url=1.jsp");
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title></title>
</head>
<body>
<h1>登录成功</h1>
</body>
</html>
package mld;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class StuDao {
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;
}
private Connection getConnection() {
// TODO Auto-generated method stub
return null;
}
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;
}
private void closeAll(Connection con, PreparedStatement pred,
ResultSet resultSet) {
// TODO Auto-generated method stub
}
}
package mld;
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();
}
}
}
