InputStream fileSource = req.getInputStream(); String tempFile = "/home/joy/桌面/tempFile"; FileOutputStream tempFileOutputStream = new FileOutputStream(tempFile); byte[] bytes = new byte[10 * 1024]; int i = 0; while ((i = fileSource.read(bytes, 0, bytes.length)) != -1) { System.out.println("已读字节：" + i + ", 剩余字节: " + fileSource.available()); System.out.println(new String(bytes)); tempFileOutputStream.write(bytes); tempFileOutputStream.flush(); if (fileSource.available() < bytes.length) { bytes = new byte[fileSource.available()]; } } tempFileOutputStream.close(); fileSource.close();

为什么该流读完的时候并没有返回-1，而是返回0，导致无限循环.(上传文档类型文件不会，字节文件就会发生这种情况)