public class Result<T>{

    /*错误码*/

    private Integer code;

    /*提示信息 */

    private String msg;

    /*具体内容*/

    private  T data;

    public Integer getCode() {

        return code;

    }

    public void setCode(Integer code) {

        this.code = code;

    }

    public String getMsg() {

        return msg;

    }

    public void setMsg(String msg) {

        this.msg = msg;

    }

    public T getData() {

        return data;

    }

    public void setData(T data) {

        this.data = data;

    }

}

public class ResultUtil {

    /**

     * 请求成功返回

     * @param object

     * @return

     */

    public static Result success(Object object){

        Result Result=new Result();

        Result.setCode(200);

        Result.setMsg("请求成功");

        Result.setData(object);

        return Result;

    }

    public static Result success(){

        return success(null);

    }

    public static Result error(Integer code,String resultResult){

        Result Result=new Result();

        Result.setCode(code);

        Result.setMsg(resultResult);

        return Result;

    }

}

@RequestMapping("/link")

@RestController

public class LinkController {

    @Autowired

    private LinkRepository linkRepository;

    @PostMapping(value = "/list")

    @ResponseBody

    public Result  getlinklList() {

        return ResultUtil.success(linkRepository.findAll());

    }

}

 public String hel(HttpSession request,Model model) {

        request.setAttribute("name","lisi"); //设置session值

        String name = (String) request.getAttribute("name"); //获取session值

        model.addAttribute("name",name);

        return "index";

    }