問題描述

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('已讀字節(jié)：' + i + ', 剩余字節(jié): ' + 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();

為什么該流讀完的時(shí)候并沒有返回-1，而是返回0，導(dǎo)致無限循環(huán).(上傳文檔類型文件不會(huì)，字節(jié)文件就會(huì)發(fā)生這種情況)

問題解答

應(yīng)該是你最后對(duì)buffer的處理導(dǎo)致剛剛好讀取完文件吧

if (fileSource.available() < bytes.length) { bytes = new byte[fileSource.available()];}

一般情況下不需要重設(shè)buffer的大小