java中使用MD5算法给密码加密的方式

package test.base64;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import sun.misc.BASE64Encoder;

public class BASE64Test {
	
	public static String md5_1(String plainText) {
		byte[] secretBytes = null;
		try {
			secretBytes = MessageDigest.getInstance("md5").digest(
					plainText.getBytes());
		} catch (NoSuchAlgorithmException e) {
			throw new RuntimeException("没有md5这个算法！");
		}
		String md5code = new BigInteger(1, secretBytes).toString(16);// 16进制数字
		// 如果生成数字未满32位，需要前面补0
		for (int i = 0; i < 32 - md5code.length(); i++) {
			md5code = "0" + md5code;
		}
		return md5code;
	}
	
	public static String md5_2(String message){
		
		try {
			MessageDigest md = MessageDigest.getInstance("md5");
			byte md5[] = md.digest(message.getBytes());
			//base64编码
			BASE64Encoder encoder = new BASE64Encoder();
			return encoder.encode(md5);
			
		} catch (NoSuchAlgorithmException e) {
			throw new RuntimeException(e);
		}
	}
}