ネットワークドライブ上の画像を読み取るコードがあります。私は何千もの画像を読みましたが、たまに次の例外が発生することがあります。
java.io.IOException: An unexpected network error occurred
at java.base/sun.nio.ch.FileDispatcherImpl.read0(Native Method)
at java.base/sun.nio.ch.FileDispatcherImpl.read(FileDispatcherImpl.java:54)
at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:245)
at java.base/sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:223)
at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:65)
at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:109)
at java.base/sun.nio.ch.ChannelInputStream.read(ChannelInputStream.java:103)
at java.base/java.io.InputStream.read(InputStream.java:205)
以下は私がそれを得るコードです
`
public static int getEPSSectionOffset(File file) throws Exception {
int result = 0;
try (InputStream inputStream =
Files.newInputStream(Paths.get(file.getAbsolutePath()),StandardOpenOption.READ);) {
byte[] fourBytes = new byte[4];
int totalBytesRead = inputStream.read(fourBytes);
if (log.isDebugEnabled())
log.debug("Total bytes read is " + totalBytesRead + " for file " + file.getPath());
if (fourBytes[0] == (byte) 0xC5 && fourBytes[1] == (byte) 0xD0 && fourBytes[2] == (byte) 0xD3
&& fourBytes[3] == (byte) 0xC6) {
totalBytesRead = inputStream.read(fourBytes);
if (log.isDebugEnabled())
log.debug("Total bytes read is " + totalBytesRead + " for file " + file.getPath());
result = makeInt(fourBytes);
}
return (result);
} catch (Exception e) {
log.error("Get EPS Section Offset - " + e.getMessage(), e);
}
return 0;
}`
この行で例外が発生します- int totalBytesRead = inputStream.read(fourBytes);