java 消息摘要算法MD

import java.security.MessageDigest;

import java.security.Security;

import org.apache.commons.codec.digest.DigestUtils;

import org.bouncycastle.crypto.Digest;

import org.bouncycastle.crypto.digests.MD2Digest;

import org.bouncycastle.crypto.digests.MD4Digest;

import org.bouncycastle.crypto.digests.MD5Digest;

import org.bouncycastle.jce.provider.BouncyCastleProvider;

import org.bouncycastle.util.encoders.Hex;

public class MDDemo

{

public static void main(String[] args) throws Exception

System.out.println(jdkMD5("測試 test!"));

System.out.println(jdkMD2("測試 test!"));

System.out.println(jdkMD4("測試 test!"));

System.out.println(bcMD4("測試 test!"));

System.out.println(bcMD5("測試 test!"));

System.out.println(bcMD2("測試 test!"));

System.out.println(ccMD5("測試 test!"));

System.out.println(ccMD2("測試 test!"));

}

public static String jdkMD5(String srcString) throws Exception

MessageDigest md = MessageDigest.getInstance("MD5");

byte[] encodeStr = md.digest(srcString.getBytes());

return Hex.toHexString(encodeStr);

public static String jdkMD2(String srcString) throws Exception

MessageDigest md = MessageDigest.getInstance("MD2");

public static String jdkMD4(String srcString) throws Exception

Security.addProvider(new BouncyCastleProvider());

MessageDigest md = MessageDigest.getInstance("MD4");

public static String bcMD4(String srcString) throws Exception

Digest digest = new MD4Digest();

digest.update(srcString.getBytes(),0,srcString.getBytes().length);

byte[] md4Bytes = new byte[digest.getDigestSize()];

digest.doFinal(md4Bytes, 0);

return  Hex.toHexString(md4Bytes);

public static String bcMD5(String srcString) throws Exception

Digest digest = new MD5Digest();

byte[] md5Bytes = new byte[digest.getDigestSize()];

digest.doFinal(md5Bytes, 0);

return  Hex.toHexString(md5Bytes);

public static String bcMD2(String srcString) throws Exception

Digest digest = new MD2Digest();

byte[] md2Bytes = new byte[digest.getDigestSize()];

digest.doFinal(md2Bytes, 0);

return  Hex.toHexString(md2Bytes);

public static String ccMD5(String srcString) throws Exception

return DigestUtils.md5Hex(srcString);

public static String ccMD2(String srcString) throws Exception

return DigestUtils.md2Hex(srcString);