spring boot做统一返回值，统一返回数据传给前端

1.需要增加的依赖

    
        
            org.projectlombok
            lombok
            true
            1.18.24
        
        
            cn.hutool
            hutool-all
              5.8.2
        
    

2.model实体

package com.example.model;

import lombok.Data;
import java.io.Serializable;
@Data
//泛型返回可以为任何类型
public class HttpResponse implements Serializable {
    
    private int code;
    //返回错误信息
    private String message;
    private  T data;
}

2.做统一返回值的业务逻辑

package com.example.advise;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.example.model.HttpResponse;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
import javax.servlet.http.HttpServletRequest;

//扫描要做统一返回项
@RestControllerAdvice(basePackages = {"com.example.controller"})
public class MyResoonseBody implements ResponseBodyAdvice {

    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;//所有都拦截
    }
   //处理异常
    @ExceptionHandler(value = Exception.class)
    public Object defaulErrorHander(HttpServletRequest req, Exception ex) {
        HttpResponse