程序语言解释

Question

import com.ump.api.paygate.Mer2Ump;import java.text.SimpleDateFormat;import java.util.*;public class TestMer2Ump {    //准备一些测试必需的参数值    private static Date date = new Date();    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhhmm");    private  static String orderid = sdf.format(date);    private static SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMdd");    private static String merdate = sdf1.format(date);    private static String mer_id = "60000100";    private static String charset = "UTF-8";    private static String sign_type="RSA";    private static String res_format = "HTML";