Source:
CSDN: InputStream类available和read方法可能读取不到完整的流数据
stackoverflow: How to read a http file inmemory without saving on local drive?
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private static InputStream download(String sourceURL) throws Exception { InputStream inputStream = new URL(sourceURL).openStream(); ByteArrayOutputStream output = new ByteArrayOutputStream(); byte[] buffer = new byte[4096]; int n = 0; while (-1 != (n = inputStream.read(buffer))) { output.write(buffer, 0, n); } return new ByteArrayInputStream(output.toByteArray()); } |