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";
    }