jsp第七次作业
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@page import="Dao.StuDao" %> <%@page import="bean.jony" %> <% jony j = new jony(); // int id = Integer.parseInt(request.getParameter("sid")); // s.setSid(id); String uname = request.getParameter("uname"); j.setUname(uname); String upsw = request.getParameter("upsw"); j.setUpsw(upsw); StuDao sd=new StuDao(); if(sd.addStu(j)>0){ request.getSession().setAttribute("uname",uname); request.getRequestDispatcher("yes.jsp").forward(request,response); }else{ response.sendRedirect("no.jsp"); } %>
MyJsp.jsp
<%@ 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> <body> <form action="index.jsp"method="post"> 用户名：<input type="text" name="uname"> 密码：<input type="password" name="upsw"> 验证码：<img src="yanzhengma.jsp"/> <input type="text" name="code"/><br> <input type="submit" name="login" value="注册"> </form> </body> </html>
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"); %> welcome<%=name%>！<br> 您已成功注册啦！<br> </body> </html>
no.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
</head>
<body>
<h1>注册失败</h1><hr>
<h2>点击重新<a href="MyJsp.jsp">注册</a></h2>
</body>
</html>
yanzhengma.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(); %>
jony.java
package bean; public class jony { private int uid; private String uname; private String upsw; public int getUid() { return uid; } public void setUid(int uid) { this.uid = uid; } public String getUname() { return uname; } public void setUname(String uname) { this.uname = uname; } public String getUpsw() { return upsw; } public void setUpsw(String upsw) { this.upsw = upsw; } public jony() { super(); // TODO Auto-generated constructor stub } public jony(int uid, String uname, String upsw) { super(); this.uid = uid; this.uname = uname; this.upsw = upsw; } }
StuDao.java
package Dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import bean.jony; public class StuDao { // 学生数据访问类 // 添加学生 public int addStu(jony j) { int i = 0; try { // 加载驱动 Class.forName("com.mysql.jdbc.Driver"); // 建立连接 Connection con = DriverManager.getConnection( "jdbc:mysql://localhost:3306/mysql", "root", "root"); // 写SQL语句 String sql = "insert into Stu values(?,?,?)"; // 执行 PreparedStatement ps = con.prepareStatement(sql); ps.setInt(1, j.getUid()); ps.setString(2, j.getUname()); ps.setString(3, j.getUpsw()); i = ps.executeUpdate(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return i; } // 登录 }
