小编sla*_*ook的帖子

我是java的新手.我创建了我的第一个Java Spring项目并添加了以下代码,但似乎有错误.

这是我试过的.

MyController.java

package org.jpanel.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jpanel.service.User;

//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import org.jpanel.service.*;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class MyController {

    public User user;

    @RequestMapping(value="/login",method=RequestMethod.GET)
    public ModelAndView login() {

        String message = "Username";
        return new ModelAndView("login", "message", message);
    }

    @RequestMapping(value="/login",method=RequestMethod.POST)
    public ModelAndView postLogin( HttpServletRequest request, HttpServletResponse response ) {
        String username =   request.getParameter("log");
        String password =   request.getParameter("pwd");

        boolean UserExists;

        if( username != "" || password != "" ) {
            UserExists …