统一controller返回对象

package com.xxx.jscaffold.handler;


import com.xxx.jscaffold.api.dto.common.Result;
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;

@RestControllerAdvice(basePackages = "com.xxx.jscaffold.controller")
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 Result) {
            return body;
        }
        return Result.success(body);
    }
}

这样不管controller返回什么对象，都会被封装到Result对象里