move Text hex to Encoder/Decoder

src/main/java/com/imyeyu/utils/Encoder.java

@@ -159,4 +159,20 @@ public class Encoder {
 			throw new TimiException(TimiCode.ERROR, e.getMessage());
 		}
 	}
+
+	/**
+	 * 字节数据转 16 进制字符串
+	 *
+	 * @param bytes 字节数据
+	 * @return 16 进制字符串
+	 */
+	public static String hex(byte[] bytes) {
+		final int l = bytes.length;
+		final char[] c = new char[l << 1];
+		for (int i = 0, j = 0; i < l; i++) {
+			c[j++] = Text.HEX_DIGITS_LOWER[(0xF0 & bytes[i]) >>> 4];
+			c[j++] = Text.HEX_DIGITS_LOWER[0x0F & bytes[i]];
+		}
+		return new String(c);
+	}
 }