import java.security.MessageDigest;

import com.cplatform.util2.security.MD5;???

?/***
???? * MD5加碼 生成32位md5碼
???? */?
??? public static String string2MD5(String inStr){?
??????? MessageDigest md5 = null;?
??????? try{?
??????????? md5 = MessageDigest.getInstance("MD5");?
??????? }catch (Exception e){?
??????????? System.out.println(e.toString());?
??????????? e.printStackTrace();?
??????????? return "";?
??????? }?
??????? char[] charArray = inStr.toCharArray();?
??????? byte[] byteArray = new byte[charArray.length];?
?
??????? for (int i = 0; i < charArray.length; i++)?
??????????? byteArray[i] = (byte) charArray[i];?
??????? byte[] md5Bytes = md5.digest(byteArray);?
??????? StringBuffer hexValue = new StringBuffer();?
??????? for (int i = 0; i < md5Bytes.length; i++){?
??????????? int val = ((int) md5Bytes[i]) & 0xff;?
??????????? if (val < 16)?
??????????????? hexValue.append("0");?
??????????? hexValue.append(Integer.toHexString(val));?
??????? }?
??????? return hexValue.toString();?
?
??? }?
?
??? /**
???? * 加密解密算法 執行一次加密，兩次解密
???? */??
??? public static String convertMD5(String inStr){?
?
??????? char[] a = inStr.toCharArray();?
??????? for (int i = 0; i < a.length; i++){?
??????????? a[i] = (char) (a[i] ^ 't');?
??????? }?
??????? String s = new String(a);?
??????? return s;?
?
??? }?
?
??? // 測試主函數?
??? public static void main(String args[]) {?
??????? String s = new String("123456");?
??????? System.out.println("原始：" + s);?
??????? System.out.println("MD5后：" + string2MD5(s));?
??????? System.out.println("加密的：" + convertMD5(s));?
??????? System.out.println("解密的：" + convertMD5(convertMD5(s)));?
??????? System.out.println(MD5.digest2Str("a"));
?
??? }?

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