Java大文件MD5值计算工具与示例

  Java计算文件MD5值(支持大文件)

package com.hthl.xxtd;  
  
import java.io.File;  
import java.io.FileInputStream;  
import java.io.IOException;  
import java.security.MessageDigest;  
  
import org.apache.commons.codec.binary.Hex;  
import org.apache.commons.codec.digest.DigestUtils;  
  
/** 
 *MD5计算工具 xuxile 2017-09-13 
 */  
public class Md5CaculateUtil {  
  
    /** 
     * 获取一个文件的md5值(可处理大文件) 
     * @return md5 value 
     */  
    public static String getMD5(File file) {  
        FileInputStream fileInputStream = null;  
        try {  
            MessageDigest MD5 = MessageDigest.getInstance("MD5");  
            fileInputStream = new FileInputStream(file);  
            byte[] buffer = new byte[8192];  
            int length;  
            while ((length = fileInputStream.read(buffer)) != -1) {  
                MD5.update(buffer, 0, length);