spring mvc

@Controller
@RequestMapping("user/")//为整个类增加一个路径/user
public class UserController_Form {
	@RequestMapping("test.do")
	@ResponseBody
	public String method(){
		return "hello spring mvc";
	}
	/**
	 * 
	 * @param userName 对应页面的表单中的名字<input name="userName"
	 * @param userPassword 对应页面的表单中的名字<input name="userPassword"
	 * @return ModelAndView对象,给InternalResourceViewResover解析
	 */
	@RequestMapping(value="login1.do",method=RequestMethod.POST)
	public ModelAndView login1(String userName,String userPassword){
		ModelAndView mav=new ModelAndView();
		//1.获取数据
		System.out.println(userName+" "+userPassword);
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//等同于转发
			//request.setAttribute("msg","登陆成功"
			//request.getRequestDispatcher("success.jsp").forward(request,response);
			mav.setViewName("success");
			mav.addObject("msg","登陆成功");
		}
		return mav;
	}
	/**
	 * 
	 * @param name @RequestParam("userName") <input name="userName"
	 * @param password @RequestParam("userName") <input name="userPassword"
	 * @return  ModelAndView对象,给InternalResourceViewResover解析
	 */
	@RequestMapping(value="login2.do",method=RequestMethod.POST)
	public ModelAndView login2(@RequestParam("userName") String name,@RequestParam("userPassword") String password){
		ModelAndView mav=new ModelAndView();
		//1.获取数据
		System.out.println(name+" "+password);
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//等同于转发
			//request.setAttribute("msg","登陆成功"
			//request.getRequestDispatcher("success.jsp").forward(request,response);
			mav.setViewName("success");
			mav.addObject("msg","登陆成功");
		}
		return mav;
	}
	/**
	 * 
	 * @param user <input name="userName" userName的第一个字母大写 前面加上set ->setUserName()
	 * 			去user对象中寻找是否有此方法,如果有就注入,没有就不注入
	 * 				<input name="userPassord" userPassword的第一个字母大写 前面加上set ->setUserPassword()
	 * 			去user对象中寻找是否有此方法,如果有就注入,没有就不注入
	 * @param model 就是ModelAndView中的Model,此对象维护的就是request对象
	 * 				等价于request.setAttribute("key","value")
	 * @return  字符串,就是ModelAndView中的view,交给InternalResourceResolver解析
	 */
	@RequestMapping(value="login3.do",method=RequestMethod.POST)
	public String login3(User user,Model model){
		String result="error";
		//1.获取数据
		System.out.println(user.getUserName()+" "+user.getUserPassword());
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//等同于转发
			//request.setAttribute("msg","登陆成功"
			//request.getRequestDispatcher("success.jsp").forward(request,response);
			
			model.addAttribute("msg","登陆成功");
			result="success";
		}
		return result;
	}
	/**
	 * 注意:用HttpServlet和HttpSession,此种做法耦合Http的API
	 * @param request
	 * @param response
	 * @param session
	 * @param modelMap
	 * @return
	 */
	@RequestMapping(value="login4.do",method=RequestMethod.POST)
	public String login4(HttpServletRequest request,HttpServletResponse response,HttpSession session,ModelMap modelMap){
		String result="error";
		//1.获取数据
		String uname=request.getParameter("userName");
		String upwd=request.getParameter("userPassword");
		System.out.println(uname+" "+upwd);
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//等同于转发
			//request.setAttribute("msg","登陆成功"
			//request.getRequestDispatcher("success.jsp").forward(request,response);
			
			modelMap.addAttribute("msg","登陆成功");
			result="success";
		}
		return result;
	}
	
	@RequestMapping(value="login5.do",method=RequestMethod.POST)
	public String login5(HttpServletRequest request,HttpServletResponse response,HttpSession session,Map map){
		String result="error";
		//1.获取数据
		String uname=request.getParameter("userName");
		String upwd=request.getParameter("userPassword");
		System.out.println(uname+" "+upwd);
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//等同于转发
			//request.setAttribute("msg","登陆成功"
			//request.getRequestDispatcher("success.jsp").forward(request,response);
			
			map.put("msg","登陆成功");
			result="success";
		}
		return result;
	}
	@RequestMapping(value="login6.do",method=RequestMethod.GET)
	public String login6(){
		String result="error";
		//1.获取数据
		
		//2.专注做业务调用,此处是模拟业务返回为true 成功
		boolean flag=true;
		//根据业务的结果做跳转
		if(flag){
			//重定向
			result="redirect:/test.jsp";
		}
		return result;
	}
}

@Controller
@RequestMapping("user_async/")
public class UserController_Async {
	@RequestMapping(value="login1.do",method=RequestMethod.GET)
	@ResponseBody//把result对象转换成json字符串,利用jackson
	public Result login1(User user){
		Result result=new Result();
		System.out.println(user.getUserName()+" "+user.getUserPassword());
		//模拟业务调用
		boolean flag=true;
		if(flag){
			result.setStatus(1);
			result.setMessage("登陆成功");
			result.setData(user);
		}else{
			result.setStatus(0);
			result.setMessage("登录失败");
		}
		return result;
	}

@RequestMapping(value="login2.do",method=RequestMethod.GET)
	public void login2(User user,HttpServletRequest request,HttpServletResponse response){
		Result result=new Result();
		System.out.println(user.getUserName()+" "+user.getUserPassword());
		//模拟业务调用
		boolean flag=true;
		if(flag){
			result.setStatus(1);
			result.setMessage("登陆成功");
			result.setData(user);
		}else{
			result.setStatus(0);
			result.setMessage("登录失败");
		}
		try {
			//转化result对象为json字符串
			String json=JSON.toJSONString(result);
			PrintWriter out=response.getWriter();
			out.println(json);
			out.flush();
			out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

@Controller
@RequestMapping("user_restful/")
public class UserController_restful {
	@RequestMapping(value="login/uname/{userName}/pwd/{userPassword}/toController",method=RequestMethod.GET)
	@ResponseBody//把result对象转换成json字符串,利用jackson
	public Result login1(@PathVariable("userName") String name,@PathVariable("userPassword") String pwd,HttpSession session){
		Result result=new Result();
		System.out.println(name+" "+pwd);
		User user=new User();
		user.setUserName(name);
		user.setUserPassword(pwd);
		//模拟业务调用
		boolean flag=true;
		if(flag){
			session.setAttribute("userName", name);
			result.setStatus(1);
			result.setMessage("登陆成功");
			result.setData(user);
		}else{
			result.setStatus(0);
			result.setMessage("登录失败");
		}
		return result;
	}

@RequestMapping(value="login2",method=RequestMethod.GET)
public void login2(User user,HttpServletRequest request,HttpServletResponse response){
		Result result=new Result();
		System.out.println(user.getUserName()+" "+user.getUserPassword());
		//模拟业务调用
		boolean flag=true;
		if(flag){
			result.setStatus(1);
			result.setMessage("登陆成功");
			result.setData(user);
		}else{
			result.setStatus(0);
			result.setMessage("登录失败");
		}
		try {
			//转化result对象为json字符串
			String json=JSON.toJSONString(result);
			PrintWriter out=response.getWriter();
			out.println(json);
			out.flush();
			out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

@Controller
@RequestMapping("upload_form/")
public class UploadController_Form {
	@RequestMapping(value="uploadfile",method=RequestMethod.POST)
	public String upload(String desc,MultipartFile addFile,HttpServletRequest request,HttpServletResponse response,Model model){
		String result="error";
		System.out.println(desc+" "+addFile);
		//获取服务器的上传文件件的路径
		String realPath=request.getServletContext().getRealPath("/uploadfile");
		File realFile=new File(realPath);
		if(realFile.exists()){
			realFile.mkdir();
		}
		if(addFile==null||addFile.isEmpty()){
			//说明没添加文件
			model.addAttribute("msg","请选择一个文件");
			result="uploadinfo";
		}else{
			//说明添加了文件,开始接收文件
			//获取上传的文件名
			String originalFileName=addFile.getOriginalFilename();
			//获取表单文件域的名字
			String fieldName=addFile.getName();
			//获取文件的类型
			String contentType=addFile.getContentType();
			//获取文件的大小
			long fileSize=addFile.getSize();
			System.out.println(originalFileName+" "+fieldName+" "+contentType+" "+fileSize);
			//可以if限定文件类型和大小
			//用spring mvc的api来上传文件
			try {
				File serverFile=new File(realFile,originalFileName);
				addFile.transferTo(serverFile);
				model.addAttribute("msg","上传文件成功");
				result="uploadinfo";
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} 
		}
		return result;
	}
}

public class SecurityInterceptor implements HandlerInterceptor{
@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj) throws Exception {
		System.out.println("preHandle");
		HttpSession session=request.getSession();
		Object o=session.getAttribute("userName");
		if(o!=null){
			//说明登录时给session存过数据userName
			
			return true;
		}
		response.sendRedirect("login_restful.jsp");
			return false;
	}
}