J2EE软件开发-实验报告

1、J2EE软件开发课程实验报告姓名 王 烁 学号 201308003104 专业 软件工程 班级 1301 指导教师及职称 程文志(助教) 开课学期 2015 至 2016 学年 下 学期上课时间 2016 年 4 月 28 日 湖南科技学院教务处编印实验题目Servlet表单验证码的设计1 实验目的：1) 熟悉Servlet的处理流程；2) 能够在页面中熟练的使用Servlet生成验证码；3) 熟悉Web开发的流程；4) 掌握页面设计的各种技巧。2 软硬件环境：软件环境：MyEclipse、JDK环境硬件环境：电脑一台3 实验内容简述：a) 完成一个表单验证码的设计：在验证生成之前，有一个选择

2、界面，该界面有两个选项；(form.jsp)(1) 4位或6位的选择，对应生成验证码为4位或6位；(2) 验证码内容的选择：内容分为三种(数字、字母、数字+字母)b) 验证码的生成要求采用Servlet来生成，其它界面可以用jsp来响应；c) 登陆页面：(login.jsp) (提示：JavaScript的代码)(1) 用户名、密码存储在web.xml文件(context-parm存储)；(2) 验证码点击后会生成新的验证；d) 验证页面：(1) 用户名、密码错误，就返回登陆页面，并提示登陆错误的相关信息(用户名和密码错误)；(2) 验证码错误，就提示验证码错误；(3) 用户输入的验证码不分大

3、小写。e) 验证成功：(1) 提示：登录成功；(2) 登陆成功后，就显示个人信息，要求采用两列表格姓名张三-$name学号2013000b) 以列表的方式显示所有的用户信息，包含(用户名、密码、姓名、学号、专业、班级、学院);5) 数据处理(web.xml)将用户名和密码存储在web.xml文件中。4实现过程#choosestyles.jsp dynamicVerificationCode.html 选择验证码规格 验证码长度 1 100 验证码类型 !- - 字母 数字 #login.jsp base href= login.jsp function reload() document.ge

4、tElementById(identityImage).src=generateImg.action?ts= + new Date().getTime(); 请登录 用户名： 密码： #validating.jsp base href= 登录中. USERINPUT SYS INFO #home.jsp base href= HOME 欢迎回来，$userName. 注销 姓名： $studentName 学号： $studentNumber #GetIdentityStylesServletpackage com.shawn.controller;import java.io.IOExcep

5、tion;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class GetIdentityStylesServlet extends HttpServlet public GetIdentityStylesServlet() super();p

6、ublic void destroy() super.destroy(); / Just puts destroy string in log/ Put your code herepublic void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException int length = Integer.valueOf(request.getParameter(length).intValue();String types = request.getP

7、arameterValues(type);request.getSession().setAttribute(length, length);request.getSession().setAttribute(types, types);response.sendRedirect(login.jsp);public void init() throws ServletException #DynamicVerificationCodeServletpackage com.shawn.controller;import com.shawn.model.VerificationCodeFactor

8、y;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.IOException;import java.util.Random;import javax.servlet.ServletException;import javax

9、.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class DynamicVerificationCodeServlet extends HttpServlet private static final long serialVersionUID = 1L;/* * Constructor of the object

10、. */public DynamicVerificationCodeServlet() super();public void destroy() super.destroy(); / Just puts destroy string in log/ Put your code herepublic void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException response.setContentType(image/jpeg);Integer

11、length = (Integer) request.getSession().getAttribute(length);String types = (String) request.getSession().getAttribute(types);System.out.println(length);System.out.println();for(String x : types)System.out.println(x);int type = 0;if(types.length = 3 | types0.equals(hidden)type = 0;elseif(types0.equa

12、ls(number)type = 1;elsetype = 2;String randomString = VerificationCodeFactory.getVerificationCode(length, type);request.getSession().setAttribute(randomString, randomString);int width = (int) (12.5 * length);int height = 30;Color color = VerificationCodeFactory.getRandomColor();Color reverse = Verif

13、icationCodeFactory.getReverseColor(color);System.out.println();BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics2D g = bi.createGraphics();g.setFont(new Font(Font.SANS_SERIF, Font.BOLD, 16);g.setColor(color);g.fillRect(0, 0, width, height);g.setColor(reverse);g

14、.drawString(randomString, 5, 20);Random random = new Random();for (int i = 0, n = random.nextInt(100); i n; i+) g.drawRect(random.nextInt(width), random.nextInt(height), 1, 1);ServletOutputStream out = response.getOutputStream();JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);encoder.enc

15、ode(bi);out.flush();/* * Initialization of the servlet. * * throws ServletException if an error occurs */public void init() throws ServletException / Put your code here#package com.shawn.controller;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.RequestDispatcher;import ja

16、vax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class LogoutServlet extends HttpServlet /* * Constructor of the object. */public LogoutServlet() super();/* * Destruction of the servle

17、t. */public void destroy() super.destroy(); / Just puts destroy string in log/ Put your code here/* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException request.getSession().invalidate();response.sen