jsp第四周作业
web
<%@ 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>
<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>
<from action="klkjk.jsp" method=post>
<input type="text" name="a" value= size=6/>
<input type="text" name="b" value= size=6/>
<input type="text" name="c" value= size=6/>
<input type="text" name="d" value= size=6/>
<input type="submit" name="s" value="fk"/>
</from>
<div class="center">
<!-- Pre Loader -->
<div class="loading">
<div class="spinner">
<div class="double-bounce1"></div>
<div class="double-bounce2"></div>
</div>
</div>
<!--/Pre Loader -->
<!-- Color Changer -->
<div class="theme-settings" id="switcher">
<span class="theme-click">
<span class="ti-settings"></span>
</span>
<span class="theme-color theme-default theme-active" data-color="green"></span>
<span class="theme-color theme-blue" data-color="blue"></span>
<span class="theme-color theme-red" data-color="red"></span>
<span class="theme-color theme-violet" data-color="violet"></span>
<span class="theme-color theme-yellow" data-color="yellow"></span>
</div>
<!-- /Color Changer -->
<div class="wrapper">
<!-- Page Content -->
<div id="content">
<div class="container">
<div class="row">
<div class="col-sm-6 auth-box">
<div class="lochana-box-shadow">
<h3 class="widget-title">登录</h3>
<form class="widget-form" action="${pageContext.request.contextPath}/LoginServlet" method="post">
<!-- form-group -->
<div class="form-group row">
<c:if test="${error_msg!=null}">
<div class="col-sm-12">
<div class="alert alert-danger error" role="alert">
${error_msg}
</div>
</div>
</c:if>
<div class="col-sm-12">
<input name="username" placeholder="请输入用户名" class="form-control" required="" data-validation="length alphanumeric" data-validation-length="3-12"
data-validation-error-msg="User name has to be an alphanumeric value (3-12 chars)" data-validation-has-keyup-event="true">
</div>
</div>
<!-- /.form-group -->
<!-- form-group -->
<div class="form-group row">
<div class="col-sm-12">
<input type="password" placeholder="请输入密码" name="password" class="form-control" data-validation="strength" data-validation-strength="2"
data-validation-has-keyup-event="true">
</div>
</div>
<div class="form-group row">
<div class="col-sm-8">
<input placeholder="请输入验证码" name="checkCode" class="form-control" data-validation="strength" data-validation-strength="2"
data-validation-has-keyup-event="true">
</div>
<div class="col-sm-4 checkCodes">
<a href="javascript:refreshCode()"><img src="${pageContext.request.contextPath}/checkCode" title="看不清点击刷新" height="80%" width="80%" id="checkCode"></a>
</div>
</div>
<!-- /.form-group -->
<!-- Check Box -->
<div class="form-check row">
<div class="col-sm-12 text-left">
<div class="custom-control custom-checkbox">
<input class="custom-control-input" type="checkbox" id="ex-check-2">
<label class="custom-control-label" for="ex-check-2">记住我</label>
</div>
</div>
</div>
<!-- /Check Box -->
<!-- Login Button -->
<div class="button-btn-block">
<button type="submit" class="btn btn-primary btn-lg btn-block">登录</button>
</div>
<!-- /Login Button -->
<!-- Links -->
<div class="auth-footer-text">
<small>新用户？,
<a href="sign-up.html">注册</a> 点这里</small>
</div>
<!-- /Links -->
</form>
</div>
</div>
</div>
</div>
</div>
<!-- /Page Content -->
</div>
</div>
</body>
</html>
package web.Servlet;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
/**
* 验证码
*/
@WebServlet("/checkCode")
public class CheckCodeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setHeader("expires","0");
int width = 80;
int height = 30;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.GRAY);
g.fillRect(0,0, width,height);
String checkCode = getCheckCode();
request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);
g.setColor(Color.YELLOW);
g.setFont(new Font("黑体",Font.BOLD,24));
g.drawString(checkCode,15,25);
ImageIO.write(image,"PNG",response.getOutputStream());
}
private String getCheckCode() {
String base = "0123456789ABCDEFGabcdefg";
int size = base.length();
Random r = new Random();
StringBuffer sb = new StringBuffer();
for(int i=1;i<=4;i++){
int index = r.nextInt(size);
char c = base.charAt(index);
sb.append(c);
}
return sb.toString();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
}
登录：
package web.Servlet;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
/**
* 验证码
*/
@WebServlet("/checkCode")
public class CheckCodeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setHeader("expires","0");
int width = 80;
int height = 30;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.GRAY);
g.fillRect(0,0, width,height);
String checkCode = getCheckCode();
request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);
g.setColor(Color.YELLOW);
g.setFont(new Font("黑体",Font.BOLD,24));
g.drawString(checkCode,15,25);
ImageIO.write(image,"PNG",response.getOutputStream());
}
private String getCheckCode() {
String base = "0123456789ABCDEFGabcdefg";
int size = base.length();
Random r = new Random();
StringBuffer sb = new StringBuffer();
for(int i=1;i<=4;i++){
int index = r.nextInt(size);
char c = base.charAt(index);
sb.append(c);
}
return sb.toString();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
}
package web.Servlet;
import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
/**
* 验证码
*/
@WebServlet("/checkCode")
public class CheckCodeServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
response.setHeader("pragma","no-cache");
response.setHeader("cache-control","no-cache");
response.setHeader("expires","0");
int width = 80;
int height = 30;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.GRAY);
g.fillRect(0,0, width,height);
String checkCode = getCheckCode();
request.getSession().setAttribute("CHECKCODE_SERVER",checkCode);
g.setColor(Color.YELLOW);
g.setFont(new Font("黑体",Font.BOLD,24));
g.drawString(checkCode,15,25);
ImageIO.write(image,"PNG",response.getOutputStream());
}
private String getCheckCode() {
String base = "0123456789ABCDEFGabcdefg";
int size = base.length();
Random r = new Random();
StringBuffer sb = new StringBuffer();
for(int i=1;i<=4;i++){
int index = r.nextInt(size);
char c = base.charAt(index);
sb.append(c);
}
return sb.toString();
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
}
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