package com.huixinpn.dionysus.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.huixinpn.dionysus.domain.User;
import com.huixinpn.dionysus.service.UserService;

@Controller
public class LoginController {

	private UserService userService;

	@Autowired
	public LoginController(UserService service) {
		this.userService = service;
	}

	@RequestMapping(value = "/login", method = RequestMethod.POST)
	public void login(@RequestBody User user) {
		userService.sign(user.getUsername(),
				user.getPassword());
	}

	@RequestMapping(value = "/login/failure", method = RequestMethod.GET)
 	public String loginFailure() {
		String message = "Login Failure!";
		return "redirect:/login?message="+message;
	}

	@RequestMapping(value = "/logout", method = RequestMethod.GET)
	public String logout() {
		String message = "Logout Success!";
		return "redirect:/login?message="+message;
	}

	@RequestMapping(value = "/validate/users", method = RequestMethod.POST)
	public boolean validate(@RequestBody User user) {
		return userService.userValidation(
				user.getUsername(),
				user.getPassword());
	}
}

package com.huixinpn.dionysus.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.huixinpn.dionysus.domain.User;
import com.huixinpn.dionysus.service.UserService;

@Controller
public class LoginController {

	private UserService userService;

	@Autowired
	public LoginController(UserService service) {
		this.userService = service;
	}

	@RequestMapping(value = "/login", method = RequestMethod.POST)
	public void login(@RequestBody User user) {
		userService.sign(user.getUsername(),
				user.getPassword());
	}

	@RequestMapping(value = "/login/failure", method = RequestMethod.GET)
 	public String loginFailure() {
		String message = "Login Failure!";
		return "redirect:/login?message="+message;
	}

	@RequestMapping(value = "/logout", method = RequestMethod.GET)
	public String logout() {
		String message = "Logout Success!";
		return "redirect:/login?message="+message;
	}

	@RequestMapping(value = "/validate/users", method = RequestMethod.POST)
	public boolean validate(@RequestBody User user) {
		return userService.userValidation(
				user.getUsername(),
				user.getPassword());
	}
	
	@RequestMapping(value = "/register", method = RequestMethod.POST)
	public User register(@RequestBody User user) {
		return userService.register(user);
	}
}

Update login controller for register