ty == "user"和ty == "administrator"都判断错误
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package 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 javax.swing.JOptionPane;import Bean.login;import Dao.loginDao;public class loginServlet extends HttpServlet { private static final long serialVersionUID = 1L; public loginServlet() { super(); } public void destroy() { super.destroy(); } public void init() throws ServletException { } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { return; } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String user = request.getParameter("user"); String password = request.getParameter("password"); String type = request.getParameter("type"); System.out.println("ls2"); System.out.println(type); System.out.println(user); response.setContentType("text/html; charset=gb2312"); PrintWriter out = response.getWriter(); try{ //login lg = new Bean.login(); System.out.println("ls2"); login lg = new loginDao().login(user,type); if(lg != null|"".equals(lg)){ System.out.println("ls3"); if(lg.getPassword().equals(password)){ out.print(user); out.print(password); out.print(type); String ty = type; if(ty == "user"){ response.sendRedirect("/Bus/index.jsp"); }else if(ty == "administrator"){ response.sendRedirect("/Bus/administrator.jsp"); } }else{ JOptionPane.showMessageDialog(null, "密码错误，请重新输入密码！"); response.sendRedirect("/Bus/login.jsp"); } }else{ JOptionPane.showMessageDialog(null, "用户名不存在！"); request.getRequestDispatcher("/login.jsp").forward(request, response); } }catch(SQLException e){ e.printStackTrace(); } } |
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