login.java

C语言小型分析器实验报告1） 待分析的简化C语言的词法说明； 2） 单词符号的种别编码方案； 3） 所识别的各类单词符号的正规式或状态转换图； 4） 待分析的简化C语言的语法规则说明； 5）

package servlet;

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

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

import dao.UserDao;

import utils.StringUtil;

public class Login extends HttpServlet{

	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		System.out.println("------------Login----------------");
		response.setCharacterEncoding("utf-8");
		HttpSession  session = request.getSession();
		PrintWriter out  = response.getWriter();
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		if ((null != username && username.length() != 0)
				&& (null != password && password.length() != 0)) {
			username = StringUtil.toChinese(username);
			password = StringUtil.toChinese(password);
			UserDao usr = new UserDao(username, password);
			if (usr.login()) {
				session.setAttribute("usr",usr);
				out.print("<script>alert(\"鐧诲綍鎴愬姛锛乗");window.location.href='index.jsp'</script>");
				System.out.println("鐧诲綍鎴愬姛");
			}else{
				out.print("<script>alert(\"鐧诲綍澶辫触锛乗");window.location.href='index.jsp'</script>");
				System.out.println("鐧诲綍澶辫触");
			}
		}
	}

	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		doGet(req,resp);
	}

}