spring boot上传文件时数据流二次读取如何解决啊？

Question

如果没有文件上传，可以写一个包装器

package dry.framework.service;
import dry.base.service.StreamService;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
public class RequestWrapperService extends HttpServletRequestWrapper {
    private String body;
 public RequestWrapperService(HttpServletRequest request) {
        super(request);
 try {
            body = new String(StreamService.readStream(request.getInputStream()));
 } catch (IOException e) {
            e.printStackTrace();
 }
    }
    public String getBody() {
        return this.body;
 }
    @Override
 public ServletInputStream getInputStream() {
        final ByteArrayInputStream is = new ByteArrayInputStream(body.getBytes());
 return new ServletInputStream() {
            @Override
 public boolean isFinished() {
                return false;
 }
            @Override
 public boolean isReady() {
                return false;
 }
            @Override
 public void setReadListener(ReadListener readListener) {
            }
            @Override
 public int read() {
                return is.read();
 }
        };
 }
    @Override
 public BufferedReader getReader() {
        return new BufferedReader(new InputStreamReader(this.getInputStream()));
 }
}

然后在过滤器里面这样返回改写的请求对象

chain.doFilter(new RequestWrapperService(r), response);

如果有文件上传，把文件流存成字符串不合适吧，该怎么写呢？

Answer 1

对于json类型的请求 如果你只是要拿到body，进行业务操作的话
可以使用requestbodyadvice

他提供了解析前和解析后的方法