add IO.md5(InputStream)

src/main/java/com/imyeyu/io/IO.java

@@ -1029,15 +1029,23 @@ public class IO implements OS.FileSystem {
 	 *
 	 * @param file 文件
 	 * @return MD5
-	 * @throws NoSuchAlgorithmException JDK 不支持此算法
 	 */
-	public static String md5(File file) throws NoSuchAlgorithmException {
+	public static String md5(File file) throws FileNotFoundException {
-		try {
+		return md5(getInputStream(file));
+	}
+
+	/**
+	 * 计算输入流 MD5
+	 *
+	 * @param stream 输入流
+	 * @return MD5
+	 */
+	public static String md5(InputStream stream) {
+		try (stream) {
 			MessageDigest md = MessageDigest.getInstance("MD5");
-			InputStream is = getInputStream(file);
 			byte[] buffer = new byte[8192];
 			int l;
-			while ((l = is.read(buffer)) != -1) {
+			while ((l = stream.read(buffer)) != -1) {
 				md.update(buffer, 0, l);
 			}
 			byte[] bytes = md.digest();
@@ -1046,9 +1054,8 @@ public class IO implements OS.FileSystem {
 				chars[j++] = Text.HEX_DIGITS_LOWER[bytes[i] >>> 4 & 0xF];
 				chars[j++] = Text.HEX_DIGITS_LOWER[bytes[i] & 0xF];
 			}
-			is.close();
 			return new String(chars);
-		} catch (IOException e) {
+		} catch (IOException | NoSuchAlgorithmException e) {
 			throw new RuntimeException(e);
 		}
 	}