简单jsp+servlet实例

开发环境myeclipse+tomcat5

先创建web project，项目名为test，

在webroot 目录下创建login.jsp文件

<body>
      <form action="login">
      username:<input type="text" name="username"><br>
      password:<input type="password" name="pwd"><br>
      <input type="submit">
      </form>
     </body>

在scr目录下的com.ht.servlet

编写AcountBean.java文件

package com.ht.servlet;

public class AcountBean {
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;
}

}

编写servlet类CheckAccount.java文件

package com.ht.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.*;

public class CheckAccount extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
     HttpSession session = request.getSession();
     AcountBean account = new AcountBean();
     String username = request.getParameter("username");
     String pwd = request.getParameter("pwd");
     account.setUsername(username);
     account.setPassword(pwd);
     if ((username != null) && (username.trim().equals("jsp"))) {
      if ((pwd != null) && (pwd.trim().equals("1"))) {
       System.out.println("session");
       session.setAttribute("account", account);
       String logon_suc = "session.jsp";
       response.sendRedirect(logon_suc);
       return;
      }
     }
     String logon_fail = "fail.jsp";
     response.sendRedirect(logon_fail);
     return;
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doGet(request, response);
}

}

在webroot目录下

编写session.jsp文件成功后跳转

     <body>
     <%
com.ht.servlet.AcountBean account=(com.ht.servlet.AcountBean)session.getAttribute("account");
      %>
        username: <%=account.getUsername() %>
       <br>
       password:<%=account.getPassword() %>
     </body>

编写fail.jsp文件失败后跳转

<body>
Logon Failed <br>
</body>

下面是web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.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>

通过myeclipse运行配置tomcat 这里省略。。。

http://127.0.0.1:8080/tset/ 验证察看结果

源码下载http://tel4.800disk.com/?mbsky0618 密码mbsky0618

来源：oschina

链接：https://my.oschina.net/u/945134/blog/228459