src/com/cms/controller/LoginController.java

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package com.cms.controller;

import com.alibaba.fastjson.JSON;
import com.cms.entity.Auth;
import com.cms.entity.User;
import com.cms.service.*;
import com.cms.utils.StrUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.*;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.List;
import java.util.Random;

@Controller
@RequestMapping(value="/login")
public class LoginController {
	
	@Autowired
	AuthService authService;
	
	@Autowired
	AdminService adminServiceImpl;
	
	@Autowired
	TeacherService teacherServiceImpl;
	
	@Autowired
	StudentService studentServiceImpl;
	
	@RequestMapping(value="/loginPage")
	public ModelAndView toLoginPage() {
		return new ModelAndView("login");
	}
	
	@ResponseBody
	@RequestMapping(value="/doLogin")
	public String doLogin(@RequestParam(defaultValue="") String username,
			@RequestParam(defaultValue="") String password,
			@RequestParam(defaultValue="0") int userType,
			@RequestParam(defaultValue="") String verifyCode, HttpSession session) {
		
		//比较验证码
		String sessionVerifyCode = (String) session.getAttribute(StrUtil.VERIFY_CODE);
		if (sessionVerifyCode == null || !sessionVerifyCode.equals(verifyCode.toUpperCase()) ) {
			return StrUtil.CODE_ERROR;
		}