[JAVA] java MD5 / java SHA-256

[JAVA] java MD5 / java SHA-256

    public String convertToMD5(String str) throws Exception {
        return convertToType(str, “MD5”);
    }
    
    
    public String convertToSHA256(String str) throws Exception {
        return convertToType(str, “SHA-256”);
    }
    
    
    private String convertToType(String str, String type) throws Exception {
        if (str == null || str.length() == 0) {
            new Exception(“convertToType : str is null or empty.”);
        }
        
        if (type == null || type.length() == 0) {
            type = “SHA-256”;
        }
        
        String result = “”;
        StringBuffer buff = new StringBuffer();
        MessageDigest digest = null;
        
        try {
            digest = MessageDigest.getInstance(type);
            byte[] hash = digest.digest(str.getBytes(“UTF-8”));
            int len = hash.length;

        return result;
    }