inputStream和outputStream互相转换

inputStream转换成outputStream

package org.example.base.controller;

import lombok.AllArgsConstructor;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author l
 * @date Created in 2021/5/25 14:33
 */
@RestController
@AllArgsConstructor
@RequestMapping("/heic")
public class HeicController {


    @GetMapping("/flower")
    public void flower(HttpServletResponse response) throws IOException {
        response.setContentType("image/heic");
        ClassLoader classLoader = ClassLoader.getSystemClassLoader();
        InputStream inputStream = classLoader.getResourceAsStream("static/images/Flower.heic");
        if (inputStream == null) {
            return;
        }
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        int len;
        byte[] bytes = new byte[1024];
        while ((len = inputStream.read(bytes)) != -1) {
            byteArrayOutputStream.write(bytes, 0, len);
        }
        inputStream.close();
        byteArrayOutputStream.close();
        byteArrayOutputStream.writeTo(response.getOutputStream());
    }


}

 
outputStream 转换成inputStream

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray());