jsp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" value="aa"><br> 密码: <input type="password" name="upwd" value="aa"> <input type="button" value="登录" onClick="validate()"> <a href="zhuce.jsp">点击注册</a> </form> </body> </html>
<%@page import="com.nn.Dao.StuDao"%> <%@ 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，即将跳回登陆页....."); response.setHeader("refresh", "5;url=login.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> <script type="text/javascript"> function validate(){ if(loginForm.stuid.value==""){ alert("id不能为空!"); return; } if(loginForm.uname.value==""){ alert("账号不能为空!"); 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"> stuid:<input type="number" name="stuid" ><br> 用户名:<input type="text" name="uname" value="aa"><br> 密码: <input type="password" name="upwd" value="aa"><br> 确认密码: <input type="password" name="upwd1" value="aa"><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 import="com.nn.Dao.StuDao"%> <%@ 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，即将跳回登录页....."); response.setHeader("refresh", "5;url=login.jsp"); } else{ out.print("两次密码不一致，即将跳回注册页....."); response.setHeader("refresh", "5;url=zhuce.jsp"); } %> </body> </html>
<%@page import="com.nn.Dao.Product"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> </head> <body> 欢迎你${uname} <a href="logout.jsp">退出登陆</a><br> 您购物车是：<Br> <% //在session中拿到集合，遍历 List<Product> list=(ArrayList<Product>)session.getAttribute("list"); if(list!=null){ for(int i=0;i<list.size();i++){ out.print(list.get(i).getName()+","+list.get(i).getPrice()); out.print("<a href='del.jsp?name="+list.get(i).getName()+"'>删除</a><br>"); } } %> <a href="stulist.jsp">所有学生列表</a> </html>
package com.nn.Dao;
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", "501002");
} 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.nn.Dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
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(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);
}
}
}
