将ByteBuffer保存成文件

 String dest = "d:/download/" + name;
 
            Path path = Paths.get(dest).getParent().toAbsolutePath().normalize();
 
            if(!Files.exists(path))
            {
                try {
                    Files.createDirectories(path);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
 
            try (FileChannel fc = new FileOutputStream(dest).getChannel()){
 
                ByteBuffer buffer = getResponseAttachment(url);
                fc.write(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }

import java.io.File;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
 
public class Main {
  public static void main(String[] argv) throws Exception {
    ByteBuffer bbuf = ByteBuffer.allocate(100);
    File file = new File("filename");
 
    boolean append = false;
 
    FileChannel wChannel = new FileOutputStream(file, append).getChannel();
 
    wChannel.write(bbuf);
 
    wChannel.close();
  }
}

String dest = "d:/download/" + name;
            try (FileChannel fc = FileChannel.open(Paths.get(dest), StandardOpenOption.WRITE)){
                ByteBuffer buffer = getResponseAttachment(url);
                fc.write(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }