1.新建一个Dynamic Web Project项目，里面新建两个java文件和一个sevlet文件，新建两个HTML文件，整体的框架图如下所示： 2.User.java里面的代码如下所示： package dto;public class User {private String
1.新建一个Dynamic Web Project项目，里面新建两个java文件和一个sevlet文件，新建两个HTML文件，整体的框架图如下所示：
2.User.java里面的代码如下所示：
package dto;
public class User {
private String name;
private String pwd;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
3.UserCheck里面的代码如下所示：
package service;
import dto.User;
public class UserCheck {
public boolean validate(User user) {
if (user != null && user.getName().equals("JSPMVC")) {
if (user.getPwd().equals("MVC")) {
return true;
}
return false;
}
return false;
}
}
4.LoginCheckServlet里面的代码如下所示：
package servlet;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
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 service.UserCheck;
import dto.User;
@WebServlet("/LoginCheckServlet")
public class LoginCheckServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("GBK");
String name = request.getParameter("name");
String pwd = request.getParameter("pwd");
User user = new User();
user.setName(name);
user.setPwd(pwd);
UserCheck uc = new UserCheck();
if (uc.validate(user)) {
request.setAttribute("user", user);
RequestDispatcher dis = request
.getRequestDispatcher("LoginSuccess.jsp");
dis.forward(request, response);
} else {
response.sendRedirect("LoginCheck.jsp");
}
}
}
5.LoginCheck.jsp里面的代码如下所示：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>LoginCheck.jsp</title> </head> <body> <form action="LoginCheckServlet" method="post"> <table> <tr> <td>用户名：</td> <td><input type="text" name="name" /></td> </tr> <tr> <td>密码：</td> <td><input type="password" name="pwd" /></td> </tr> <tr> <td><input type="submit" value="提交" /></td> <td><input type="reset" value="重置" /></td> </tr> </table> </form> </body> </html>
6.LoginSuccess.jsp里面的代码如下所示：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>LoginSuccess.jsp</title> </head> <body> <jsp:useBean id="user" type="dto.User" scope="request" /> 恭喜<jsp:getProperty property="name" name="user" />登录成功！ </body> </html>
7.在浏览器里面输入http://localhost:8080/Servlet/LoginCheck.jsp运行得到如下的结果：