package other; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; /*  * MD5 算法 */ public class MD5 {     // 全局数组     private final static String[] strDigits = { "0", "1", "2", "3", "4", "5",             "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };     public MD5() {     }     // 返回形式为数字跟字符串     private static String byteToArrayString(byte bByte) {         int iRet = bByte;         // System.out.println("iRet="+iRet);         if (iRet < 0) {             iRet += 256;         }         int iD1 = iRet / 16;         int iD2 = iRet % 16;         return strDigits[iD1] + strDigits[iD2];     }     // 返回形式只为数字     private static String byteToNum(byte bByte) {         int iRet = bByte;         System.out.println("iRet1=" + iRet);         if (iRet < 0) {             iRet += 256;         }         return String.valueOf(iRet);     }     // 转换字节数组为16进制字串     private static String byteToString(byte[] bByte) {         StringBuffer sBuffer = new StringBuffer();         for (int i = 0; i < bByte.length; i++) {             sBuffer.append(byteToArrayString(bByte[i]));         }         return sBuffer.toString();     }     public static String GetMD5Code(String strObj) {         String resultString = null;         try {             resultString = new String(strObj);             MessageDigest md = MessageDigest.getInstance("MD5");             // md.digest() 该函数返回值为存放哈希值结果的byte数组             resultString = byteToString(md.digest(strObj.getBytes()));         } catch (NoSuchAlgorithmException ex) {             ex.printStackTrace();         }         return resultString;     }     public static void main(String[] args) {         MD5 getMD5 = new MD5();         System.out.println(getMD5.GetMD5Code("000000"));     } }