check.java

完整的java源程序

package mypack;


import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Check extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Check() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * 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 {
		

	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @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 doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String username = (String)request.getParameter("username");
		String password = (String)request.getParameter("password");
		if(!SQLQuery.validate(username, password)){
			request.setAttribute("error.message","非法登陆!");
			RequestDispatcher requestDispatcher = request.getRequestDispatcher("login.jsp");
			requestDispatcher.forward(request,response);	
		}else{
			request.getSession().setAttribute("username", username);
			RequestDispatcher requestDispatcher = request.getRequestDispatcher("success.jsp");
			requestDispatcher.forward(request,response);
		}
	}

}