开发环境Eclipse+Tomcat7
1、先创建web project，项目名为Hello，
2、在WebRoot 目录下创建login.jsp文件，只需修改body中的内容，如下所示：
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<body> <form action="login"> username:<input type="text" name="username"><br> password:<input type="password" name="pwd"><br> <input type="submit"> </form> </body> |
3、在scr目录下的com.ht.servlet编写AcountBean.java文件，代码如下：
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package com.ht.servlet; public class AccountBean { private String username = ""; private String password = ""; public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } } |
4、在scr目录下的com.ht.servlet编写servlet类CheckAccount.java文件，代码如下：
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package com.ht.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class CheckAccount extends HttpServlet { @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req,resp); } @Override public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { HttpSession session = req.getSession(); AccountBean account = new AccountBean(); String username = req.getParameter("username"); String pwd = req.getParameter("pwd"); account.setPassword(pwd); account.setUsername(username); if((username != null)&&(username.trim().equals("jsp"))) { if((pwd != null)&&(pwd.trim().equals("1"))) { System.out.println("success"); session.setAttribute("account", account); String login_suc = "success.jsp"; resp.sendRedirect(login_suc); return; } } String login_fail = "fail.jsp"; resp.sendRedirect(login_fail); return; } } |
5、在WebRoot目录下编写success.jsp文件 成功后跳转
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<body> <% AccountBean account = (AccountBean)session.getAttribute("account"); %> username:<%= account.getUsername()%> <br> password:<%= account.getPassword() %> </body> |
6、在WebRoot目录下编写fail.jsp文件 失败后跳转
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<body> Login Failed! <br> </body> |
7、修改web.xml配置文件
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<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>CheckAccount</servlet-name> <servlet-class>com.ht.servlet.CheckAccount</servlet-class> </servlet> <servlet-mapping> <servlet-name>CheckAccount</servlet-name> <url-pattern>/login</url-pattern> </servlet-mapping> </web-app> |