这个可以直接使用哦
public class MD5Test {
public static String getFile(File file) {
if (!file.exists() || !file.isFile()) {
return null;
}
MessageDigest digest = null;
FileInputStream in = null;
byte buffer[] = new byte[1024];
int length;
try {
digest = MessageDigest.getInstance("MD5");
in = new FileInputStream(file);
while ((length = in.read(buffer, 0, 1024)) != -1) {
digest.update(buffer, 0, length);
}
in.close();
} catch (Exception e) {
e.printStackTrace();
}
BigInteger bigInt = new BigInteger(1, digest.digest());
return bigInt.toString(16);
}
}