java - inputstream流读到最后为什么没有返回 -1 ?
ringa_lee
ringa_lee 2017-04-18 10:52:57
0
1
885
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)

ringa_lee
ringa_lee

ringa_lee

reply all (1)
黄舟

It should be because of your final processing of the buffer that you just finished reading the file

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

Normally there is no need to reset the buffer size

    Latest Downloads
    More>
    Web Effects
    Website Source Code
    Website Materials
    Front End Template
    About us Disclaimer Sitemap
    php.cn:Public welfare online PHP training,Help PHP learners grow quickly!