学步园

package com.utils.md5;

import java.io.*;
import java.security.*;

public class MD5 {
	public static String hex(byte[] array) {
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < array.length; ++i) {
			sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100)
					.toUpperCase().substring(1, 3));
		}
		return sb.toString();
	}

	public static String md5(String message) {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");// 想用SHA加密的话就把MD5换成SHA吧
			return hex(md.digest(message.getBytes("CP1252")));
		} catch (NoSuchAlgorithmException e) {
		} catch (UnsupportedEncodingException e) {
		}
		return null;
	}

}

package com.utils.junit;

import com.utils.md5.MD5;

import junit.framework.TestCase;

public class MD5Test extends TestCase {

	
         @Test
         public  void  md5() {
		String s = "123";
		System.out.println(s);
		
		String str = MD5.md5(s);
		System.out.println(str);
		
		String st = MD5.md5(s);
		System.out.println(st);

	}
}

/*
123
202CB962AC59075B964B07152D234B70
202CB962AC59075B964B07152D234B70
*/