java拼凑oracle中sql语句，date类型数据拼接

相关代码：

//获取当前系统时间
Date currentTime = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTimeStr = sdf.format(currentTime);

String valueStr = "";

for (int i = 0; i < values.size(); i++)
{
    if (StringUtils.equalsIgnoreCase("CREATE_TIME", keyList.get(i)) ||
        StringUtils.equalsIgnoreCase("MODIFY_DATE", keyList.get(i)))
    {
        valueStr = valueStr + "TO_DATE(" + "'" + values.get(i) + "'" + "," +
                   " 'SYYYY-MM-DD HH24:MI:SS')" + ",";
    }
    else
    {
        valueStr = valueStr + "'" + values.get(i) + "'" + ",";
    }
}
valueStrList.add(valueStr.substring(0, valueStr.length() - 1));