www.pudn.com > MD5.rar > Base64Code.java

package com.md5.chen; 
 
import java.io.BufferedReader; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.InputStreamReader; 
 
import org.apache.commons.codec.binary.Base64; 
import org.apache.commons.codec.digest.DigestUtils; 
 
 
 
import java.io.*; 
import java.security.DigestInputStream; 
import java.security.MessageDigest; 
 
//获取BASE64编码的文件MD5 
public class Base64Code 
{ 
	private Base64Code() 
	{ 
 
	} 
 
	public static byte[] encode(byte[] buf) 
	{ 
		if (buf == null) 
		{ 
			return encode(buf, 0, 0); 
		} else 
		{ 
			return encode(buf, 0, buf.length); 
		} 
	} 
 
	// 将 buf 进行 BASE64 编码 
	public static byte[] encode(byte[] buf, int pos, int length) 
	{ 
		byte[] result = null; 
 
		if (length > 0) 
		{ 
			if (pos == 0 && buf.length == length) 
			{ 
				return Base64.encodeBase64(buf); 
			} else 
			{ 
				byte[] newbuf = new byte[length]; 
				System.arraycopy(buf, pos, newbuf, 0, length); 
				result = Base64.encodeBase64(newbuf); 
			} 
		} 
		return result; 
	} 
 
	// 将 BASE64 编码的字符串 buf 进行解码 
	public static byte[] decode(byte[] buf, int pos, int length) 
			throws IOException 
	{ 
		byte[] result = null; 
 
		if (length > 0) 
		{ 
			result = FastBase64.decodeBase64(buf, pos, length); 
 
			// if (pos == 0 && buf.length == length) { 
			// result = Base64.decodeBase64(buf); 
			// } else { 
			// byte[] newbuf = new byte[length]; 
			// System.arraycopy(buf, pos, newbuf, 0, length); 
			// result = Base64.decodeBase64(newbuf); 
			// } 
		} 
 
		return result; 
	} 
	 
	public static void main(String[] args) 
	{ 
		BufferedReader reader = new BufferedReader(new InputStreamReader( 
				System.in)); 
		String PATH=""; 
		String md5String=""; 
		byte k[]=null; 
		System.out.println("输入文件路径:"); 
		try 
		{ 
			PATH = reader.readLine();// 将主目录路径保存再PATH中 
 
		} catch (IOException e) 
		{ 
			e.toString(); 
		} 
		try 
		{ // 生成MessageDigest对象MD 
			MessageDigest md = MessageDigest.getInstance("MD5"); 
			FileInputStream fin = new FileInputStream(PATH); 
			DigestInputStream din = new DigestInputStream(fin, md); 
 
			while (din.read() != -1) 
			{ 
				; 
			} 
			// 计算MD5 并进行BASE64编码 
			 md5String = new String(Base64Code.encode(md.digest())); 
			 
		} catch (Exception e) 
		{ 
			e.toString(); 
		} 
         
		System.out.println("BASE64-MD5:"+md5String); 
		 
	 
		 
 
	} 
}