文件CRC32

import java.util.zip.CRC32;
import java.util.zip.CheckedInputStream;
import java.io.FileInputStream;
import java.io.File;

public class FileToCRCUtil {

public static String getFileCRCCode(File file) throws Exception {

FileInputStream fileinputstream = new FileInputStream(file);
CRC32 crc32 = new CRC32();
for (CheckedInputStream checkedinputstream =new CheckedInputStream(fileinputstream, crc32);
checkedinputstream.read() != -1; ) {
}
return Long.toHexString(crc32.getValue());


}


}