spring boot统一返回

springboot 写controller层代码，尽量减少重复代码,用ResponseBodyAdvice实现统一返回：

1. ResponseAdvice

package com.zdxf.common;

import com.zdxf.common.pojo.ResultVO;
import com.zdxf.common.utils.RestResponse;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * @Author: zj
 * @Date: 2023/7/24 0024 17:08
 * @Description:
 */
@RestControllerAdvice(basePackages = "com.xxx.modules")
public class ResponseAdvice implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        // 如果不需要进行封装的，可以添加一些校验手段，比如添加标记排除的注解
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType,
                                  MediaType selectedContentType,
                                  Class<? extends HttpMessageConverter<?>> selectedConverterType,
                                  ServerHttpRequest request, ServerHttpResponse response) {
        // 提供一定的灵活度，如果body已经被包装了，就不进行包装
        if (body instanceof ResultVO) {
            return body;
        }
        return ResultVO.success(body);
    }
}

2.例子

@GetMapping("/list")
@ApiOperation(value = "分页查询列表", notes = "分页查询列表")
public Page<SysUserEntity> list(SysUserDto dto) {
 return sysUserService.queryPage(dto);
}