md5.java

1 系统简介 1.1 系统名称：bugtrail 1.2 适用范围：大型或小型公司 1.3 用途：在项目周期内进行项目管理

package bugtrail.util;

import java.security.*; 
public class MD5{
	
	public final static String MD5(String s){ 
		final char hexDigits[] = { 
				'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 
				'E', 'F'}; 
		try { 
			final byte[] strTemp = s.getBytes(); 
			final MessageDigest mdTemp = MessageDigest.getInstance("MD5"); 
			mdTemp.update(strTemp); 
			final byte[] md = mdTemp.digest(); 
			final int j = md.length; 
			final char str[] = new char[j * 2]; 
			int k = 0; 
			for (int i = 0; i < j; i++) { 
				final byte byte0 = md[i]; 
				str[k++] = hexDigits[byte0 >>> 4 & 0xf]; 
				str[k++] = hexDigits[byte0 & 0xf]; 
			} 
			return new String(str); 
		} 
		catch (final Exception e){ 
			return null; 
		} 
	} 
//	public static void main(String[] args) {
//		System.out.print(MD5.MD5("123"));
//
//	} 
}