JAVA SHA-1加密及DES加解密

1、SHA-1加密

SHA-1标准加密：

//SHA-1
	public static String getSha1(String str){
		if(str == null || str.length() == 0){
			return null;
		}
		char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
		
		try {
			MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
			mdTemp.update(str.getBytes("UTF-8"));
			
			byte[] md = mdTemp.digest();
			int j = md.length;
			char buf[] = new char[j*2];
			int k = 0;
			for(int i =0;i<j;i++){
				byte byteO = md[i];
				buf[k++] = hexDigits[byteO >>> 4 & 0xf];
				buf[k++] = hexDigits[byteO & 0xf];
			}
			return new String(buf);
		} catch (NoSuchAlgorithmException e) {
			return null;
		} catch (UnsupportedEncodingException e) {
			return null;
		}
	}

SHA-1的160位算法

	public static String getSHA(String spara) {
		String sRtn = null;
		try {
			byte[] plainText = spara.getBytes("UT