loginservlet.java

聊天室 JSP截面与SERVLET结合的实力 以及用了STRUCTS

package test.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import test.user.User;

/**
 * Servlet implementation class for Servlet: LoginServlet
 *
 */
 public class LoginServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
    /* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#HttpServlet()
	 */
	public LoginServlet() {
		super();
	}   	 	
	
	/* (non-Java-doc)
	 * @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//get message from jsp
		String name=request.getParameter("user");
		String password=request.getParameter("password");
		String type=request.getParameter("type");
		if(type!=null){
			type=new String(type.getBytes("ISO-8859-1"));
		}
		//validate &//redirect 
		User user=new User(name,password,type);
		System.out.println(user);
		if(valid(user)){
			response.sendRedirect("welcome.jsp");
		}
		else{
			response.sendRedirect("login.jsp");
		}
		
	}   	
	public boolean valid(User user){
		String names[]={"li","wang","liu"};
		String passwords[]={"001","002","003"};
		for(int i=0;i<names.length;i++){
			if(names[i].equals(user.getUser())){
				return passwords[i].equals(user.getPassword());
			}
		}
		return false;
	}
}