Jmeter-获取本月第一天和最后一天日期时间，并转换为时间戳

BeanShell Sampler

import java.text.SimpleDateFormat;
import java.util.Date;
import java.text.*;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//获取当前月第一天：
    Calendar c = Calendar.getInstance();   
    c.add(Calendar.MONTH, 0);
    c.set(Calendar.HOUR_OF_DAY,0);
    c.set(Calendar.MINUTE,0);
    c.set(Calendar.SECOND,0);
    c.set(Calendar.DAY_OF_MONTH,1);//设置为1号,当前日期既为本月第一天 
    String first = format.format(c.getTime());
    vars.put("first",first);

//获取当月最后一天：
     Calendar ca = Calendar.getInstance();    
     ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));  
     ca.set(Calendar.HOUR_OF_DAY,23);
    ca.set(Calendar.MINUTE,59);
    ca.set(Calendar.SECOND,59);
     String last = format.format(ca.getTime());
     vars.put("last",last);

//将日期格式转换为时间戳
String begin = vars.get("first");
String end =  vars.get("last");
Date beginTime1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(begin);
Date endTime1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(last);
String beginTime = String.valueOf(beginTime1.getTime());
String endTime = String.valueOf(endTime1.getTime());
vars.put("beginTime",beginTime);
vars.put("endTime",endTime);