jsp作业7

用户表：  uid (主键，自动增长)   uname  upwd

使用分层实现注册。（必做）

使用分层实现登录。（选做）

index。jsp（登录界面）

<%@ 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>
   <style type="text/css">
   body{
  background-image:url(lvsecaodifengjingkuanpingbizhi_381861_m.jpg);
   background-size:cover;
   }
   </style>
  </head>
  
  <body>
  
  
<form action="MyJsp.jsp" method="post">

输入用户名：<input type="text" name="uname"/><br>

输入密码：<input type="password" name="upwd"/><br>
验证码：<img src="number.jsp"/>
          <input type="text" name="code"/><br>
         
        <input type="submit" name="login" value="注册"><br>
</form>
  </body>
</html>

 MyJsp.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@page import="dao.stuDao" %>
<%@page import="jk.stu" %>
<%
			    stu s = new stu();
			   // int id = Integer.parseInt(request.getParameter("sid"));
			  //  s.setSid(id);
			    String uname = request.getParameter("uname");
			    s.setUname(uname);
			    String upwd = request.getParameter("upwd");
			    s.setUpwd(upwd);
			    
			    stuDao sd=new stuDao();
			    if(sd.addStu(s)>0){
			        	request.getSession().setAttribute("uname",uname);
                 		request.getRequestDispatcher("yes.jsp").forward(request,response);
                 }else{
			         response.sendRedirect("no.jsp");
			    }
 %>

 注册成功yes.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
   <style type="text/css">
   body{
  background-image:url(lvsecaodifengjingkuanpingbizhi_381861_m.jpg);
   background-size:cover;
   }
   </style>
</head>
<body>

<%
    String name = (String) request.getSession().getAttribute("uname");
%>
欢迎<%=name%>！<br>
注册成功啦！<br>


</body>
</html>

 注册失败no.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>



<html>
  <head>
   <style type="text/css">
   body{
  background-image:url(lvsecaodifengjingkuanpingbizhi_381861_m.jpg);
   background-size:cover;
   }
   </style>

  </head>
  
  <body>
  <h1>注册失败</h1><hr>
    <h2>点击重新<a href="index.jsp">注册</a></h2>
  </body>
</html>

 

验证码number.jsp

<%@ page contentType="image/jpeg" language="java" import="java.util.*,java.awt.*,java.awt.image.*,javax.imageio.*" pageEncoding="utf-8"%>
 
<%!
    Color getRandColor(int fc,int bc){
        Random random = new Random();
        if(fc > 255){
            fc = 255;
        }
        if(bc < 255){
            bc = 255;
        }
        int r = fc +random.nextInt(bc-fc);
        int g = fc +random.nextInt(bc-fc);
        int b = fc +random.nextInt(bc-fc);
 
 
        return new Color(r,g,b);
    }
%>
 
<%
    //设置页面不缓存
    response.setHeader("Pragma","no-cache");
    response.setHeader("Cache-Control","no-catch");
    response.setDateHeader("Expires",0);
 
    //在内存中创建图象
    int width = 60;
    int height = 20;
    BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
 
    //创建图象
    Graphics g = image.getGraphics();
    //生成随机对象
    Random random = new Random();
    //设置背景色
    g.setColor(getRandColor(200,250));
    g.fillRect(0,0,width,height);
    //设置字体
    g.setFont(new Font("Tines Nev Roman",Font.PLAIN,18));
    //随机产生干扰线
    g.setColor(getRandColor(160,200));
    for(int i = 0; i < 255; i++){
        int x = random.nextInt(width);
        int y = random.nextInt(height);
        int xl = random.nextInt(12);
        int yl = random.nextInt(12);
    }
    //随机产生认证码,4位数字
    String sRand = "";
    for(int i = 0; i < 4; i++){
        String rand = String.valueOf(random.nextInt(10));
        sRand  += rand;
        //将认证码显示到图象中
        g.setColor(new Color(20 + random.nextInt(110),20 + random.nextInt(110),20 + random.nextInt(110)));
        g.drawString(rand,13*i+6,16);
    }
    session.setAttribute("rCode",sRand);
    //图像生效
    g.dispose();
    //输出图像到页面
    ImageIO.write(image,"JPEG",response.getOutputStream());
    out.clear();
    out = pageContext.pushBody();
%>

 数据库

 

 

 

 

 

 

 

posted @ 2021-04-17 16:30  bluebless  阅读(58)  评论(0)    收藏  举报