From 55bc4dd3ad9850a66f11253f06717632209b7242 Mon Sep 17 00:00:00 2001
From: thinkgem <thinkgem@163.com>
Date: Fri, 17 Aug 2018 23:11:17 +0800
Subject: [PATCH] =?UTF-8?q?Md5Utils=E5=A2=9E=E5=8A=A0=E8=8E=B7=E5=8F=96?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6MD5=E5=80=BC=EF=BC=8C=E6=94=AF=E6=8C=81?=
 =?UTF-8?q?=E8=8E=B7=E5=8F=96=E6=96=87=E4=BB=B6=E6=8C=87=E5=AE=9A=E5=89=8D?=
 =?UTF-8?q?=E9=83=A8=E5=88=86=E7=9A=84MD5=E3=80=82?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../com/jeesite/common/codec/Md5Utils.java    | 36 ++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/common/src/main/java/com/jeesite/common/codec/Md5Utils.java b/common/src/main/java/com/jeesite/common/codec/Md5Utils.java
index 6cdd5b65..9a03273e 100644
--- a/common/src/main/java/com/jeesite/common/codec/Md5Utils.java
+++ b/common/src/main/java/com/jeesite/common/codec/Md5Utils.java
@@ -3,12 +3,16 @@
  */
 package com.jeesite.common.codec;
 
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.lang3.StringUtils;
 
+import com.jeesite.common.io.IOUtils;
+
 /**
  * MD5不可逆加密工具类
  * @author ThinkGem
@@ -17,7 +21,6 @@ public class Md5Utils {
 
 	private static final String MD5 = "MD5";
 	private static final String DEFAULT_ENCODING = "UTF-8";
-
 	
 	/**
 	 * 对输入字符串进行md5散列.
@@ -63,5 +66,36 @@ public class Md5Utils {
 	public static byte[] md5(InputStream input) throws IOException {
 		return DigestUtils.digest(input, MD5);
 	}
+
+	/**
+	 * 获取文件的MD5值
+	 */
+	public static String md5File(File file) {
+		return md5File(file, -1);
+	}
+	
+	/**
+	 * 获取文件的MD5值，支持获取文件部分的MD5值
+	 */
+	public static String md5File(File file, int size) {
+		if (file != null && file.exists()){
+			InputStream in = null;
+	        try {
+	            byte[] bytes = null;
+	            in = FileUtils.openInputStream(file);
+	            if (size != -1 && file.length() >= size){
+	            	bytes = IOUtils.toByteArray(in, size);
+	            }else{
+	            	bytes = IOUtils.toByteArray(in);
+	            }
+	            return EncodeUtils.encodeHex(md5(bytes));
+	        } catch (IOException e) {
+				return StringUtils.EMPTY;
+			} finally {
+	            IOUtils.closeQuietly(in);
+	        }
+		}
+		return StringUtils.EMPTY;
+	}
 	
 }