InputStream流已经关闭了,但是依旧无法delete文件或者文件夹,提示被JVM占用等

InputStream流已经关闭了,但是依旧无法delete文件或者文件夹,提示被JVM占用等

有时候流明明已经关闭了,但是还是无法删除文件或者文件夹,提示被JVM占用等

public void download(String sourceUrl, String targetPathFile) {URL url = null;//从网络上下载一张图片InputStream inputStream = null;OutputStream outputStream = null;//建立一个网络链接HttpURLConnection con = null;try {url = new URL(sourceUrl);con = (HttpURLConnection) url.openConnection();inputStream = InputStream();outputStream = new FileOutputStream(new File(targetPathFile));int n = -1;byte b[] = new byte[1024];while ((n = ad(b)) != -1) {outputStream.write(b, 0, n);}outputStream.flush();} catch (Exception e) {e.printStackTrace();} finally {try {if(inputStream!=null)inputStream.close();} catch (IOException e1) {e1.printStackTrace();}try {if(outputStream!=null)outputStream.close();} catch (IOException e) {e.printStackTrace();}}}

这样的时候,通常可以这样解决:

                    ();//在删除之前调用垃圾回收,这样jvm就不会占用文件了try {Thread.sleep(100);//我这边是这样,如果不休眠一会,依旧无法删除} catch (InterruptedException e) {e.printStackTrace();}boolean dirFile = FileUtils.deleteQuietly(new File(targetDirPath));boolean zipFile = FileUtils.deleteQuietly(new File(targetZipPathFile));