controller大全（推荐）

@Controller
@RequestMapping("/router")
@SessionAttributes(value = { "username" })
public class RouterController {
    @RequestMapping(value = "/index", params = { "username", "age!=18" })
    public String index() {
        return "index";
    }

    // 通配符的使用
    @RequestMapping(value = "/testantpath/*/abc")
    public String testantpath() {
        return "index";
    }

    // pathVariable
    @RequestMapping(value = "/testpathvariable/{userId}")
    public String testpathvariable(
            @PathVariable(value = "userId") Integer userId) {
        System.out.println(userId);
        return "index";
    }

    // RESTFUL
    @RequestMapping(value = "/user/{userId}", method = RequestMethod.GET)
    public String testgetmethod(@PathVariable(value = "userId") Integer userId) {
        System.out.println("GET:" + userId);
        return "index";
    }

    @RequestMapping(value = "/user/{userId}", method = RequestMethod.POST)
    public String testPostmethod(@PathVariable(value = "userId") Integer userId) {
        System.out.println("POST:" + userId);
        return "index";
    }

    @RequestMapping(value = "/user/{userId}", method = RequestMethod.PUT)
    public String testputmethod(@PathVariable(value = "userId") Integer userId) {
        System.out.println("PUT:" + userId);
        return "index";
    }

    @RequestMapping(value = "/user/{userId}", method = RequestMethod.DELETE)
    public String testdeletemethod(
            @PathVariable(value = "userId") Integer userId) {
        System.out.println("DELETE:" + userId);
        return "index";
    }

    // @RequestParam
    @RequestMapping(value = "/tesrequestparam")
    public String tesrequestparam(
            @RequestParam(value = "username", required = false) String username) {
        System.out.println(username);
        return "index";
    }

    // @RequestHeader
    @RequestMapping(value = "/testrequestheader")
    public String testrequestheader(
            @RequestHeader(value = "Accept-Language") String al) {
        System.out.println(al);
        return "index";
    }

    // @CookieValue
    @RequestMapping(value = "/testcookievalue")
    public String testcookievalue(
            @CookieValue(value = "JSESSIONID") String cookie) {
        System.out.println(cookie);
        return "index";
    }

    /*
     * pojo的 获取
     */
    @RequestMapping(value = "/testuser")
    public String testpojo(TUser user) {
        System.out.println(user);
        // 数据库的操作
        return "index";
    }

    /*
     * ModelAndView
     */
    @RequestMapping(value = "/testmodelandview")
    public ModelAndView testmodelandview() {
        ModelAndView modelAndView = new ModelAndView("index");
        modelAndView.addObject("username", "lisi");
        return modelAndView;
    }

    /*
     * Map
     */
    @RequestMapping(value = "/testmap")
    public String testmap(Map<String, Object> map) {
        map.put("age", 18);
        return "index";
    }

    /*
     * Model
     */
    @RequestMapping(value = "/testmodel")
    public String testModel(Model model) {
        model.addAttribute("email", "1@1.com");
        return "index";
    }

    /*
     * @SessionAttributes
     */
    @RequestMapping(value = "/testsession")
    public String testsession(Model model) {
        model.addAttribute("username", "wangwu");
        return "index";
    }

    /*
     * @ModelAttribute
     */
    @ModelAttribute
    public void model(
            @RequestParam(value = "userId", required = false) Integer userId,
            Model model) {
        if (userId != null) {
            // 从数据库获取对象
            TUser user = new TUser(userId, "wangwu", "123456", "1@1.com", 18);
            model.addAttribute("user", user);
        }
    }

    @RequestMapping(value = "/testmodelattribute")
    public String testmodelattribute(@ModelAttribute(value = "user") TUser user) {
        System.out.println(user);
        // 数据库的操作
        return "index";
    }

    /*
     * 获取JSON数据
     */
    @ResponseBody
    @RequestMapping(value = "/testjson")
    public TUser testjson() {
        TUser user = new TUser(5, "wangwu", "123456", "1@1.com", 18);
        return user;

    }

    /*
     * 文件上传
     */
    @RequestMapping(value = "/testupload")
    public void upload(@RequestParam(name = "file1") MultipartFile file) {
        File newFile = new File("E:\\" + file.getOriginalFilename());
        if (!newFile.exists()) {
            newFile.mkdirs();
        }
        try {
            file.transferTo(newFile);
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /*
     * servlet api
     */
    @RequestMapping(value = "/testhttpservletrequest")
    public String testHttpServletRequest(HttpServletRequest request) {
        request.setAttribute("username", "admin");
        return "index";
    }

    /*
     * redirect
     */
    @RequestMapping(value = "/testredirect")
    public String testRedirect() {
        return "redirect:/router/testhttpservletrequest";
    }

    /*
     * testValidator
     */
    @RequestMapping(value = "/testvalidator")
    public String testValidator(@Valid TUser user, BindingResult result,
            HttpServletRequest request) {
        if (result.hasErrors()) {
            List<FieldError> fieldErrors = result.getFieldErrors();
            for (FieldError fieldError : fieldErrors) {
                request.setAttribute("_error" + fieldError.getField(),
                        fieldError.getDefaultMessage());
            }
        }
        return "index";
    }

}