获取昨日当前时间的时间戳

import java.text.SimpleDateFormat; 

import java.util.Calendar; 

import java.util.Date; 

  

try{ 

    Date date =new Date();  //获取当前时间 

    Calendar cal = Calendar.getInstance(); 

    cal.add(Calendar.DAY_OF_YEAR,-1);  //减一天，变为前一天 

    String yesterdaytime=cal.getTime().getTime().toString(); 

    vars.put("yesterday",yesterdaytime);  

    log.info("yesterdaytime:="+yesterdaytime); 

} 

catch(Exception e){ 

    //异常时消息 

}