inservlet.java

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package com.wl.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.wl.db.dao.*;
import com.wl.db.vo.*;

public class Inservlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Inservlet() {
		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 {
		doPost(request, response);
	}

	/**
	 * 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 {
		System.out.println("-----------------");
		System.out.println("haha");
		String error;
		response.setContentType("text/html;charset=gb2312");
		String username = request.getParameter("username");
		System.out.println("aa");
		String pwd = request.getParameter("pwd");
		
		InUserDAO db = new InUserDAO();
		// ?

		NewUser user;
		try {
			user = db.getuser(username,pwd);
			System.out.println("hehe");
			if (user!=null) {
				System.out.println("bb");
				request.getSession(true).setAttribute("username", username);
				try {
					request.getRequestDispatcher("s.jsp").forward(request,
							response);
				} catch (Exception ex) {
					ex.printStackTrace();
				}
			} /*else {
				System.out.println("cc");
				request.setAttribute("error", "登录失败");
				try {
					request.getRequestDispatcher("In.jsp").forward(request,
							response);
				} catch (Exception ex) {
					ex.printStackTrace();
				}
			}*/

		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}