时间

//当前年
private void getInverterYear(Long projectId) {
    Calendar cal=Calendar.getInstance();//获取当前日期
    long todayZero=cal.getTimeInMillis()/(1000*3600*24)*(1000*3600*24)-TimeZone.getDefault().getRawOffset();//今天0点毫秒值
    long twelve=todayZero+24*60*60*1000-1; //今天24点毫秒值
    int currentYear=cal.get(Calendar.YEAR);//获取年
    cal.clear();
    cal.set(Calendar.YEAR,currentYear);//设置
    Timestamp timestampZero=new Timestamp(cal.getTime().getTime());//今年开始
    Timestamp timestamp=new Timestamp(twelve);//今日24点
}

//当前月
public void getInverterMonth(Long projectId){
    Calendar first = Calendar.getInstance();//获取当前日期
    long todayZero = first.getTimeInMillis() / (1000 * 3600 * 24) * (1000 * 3600 * 24) - TimeZone.getDefault().getRawOffset();
    first.setTimeInMillis(todayZero);
    first.add(Calendar.MONTH, 0);
    first.set(Calendar.DAY_OF_MONTH, 1);//设置为1号,当前日期既为本月第一天
    long zero = first.getTime().getTime();
    long twelve = todayZero + 24 * 60 * 60 * 1000 - 1; //今天24点毫秒值
    Timestamp timestampZero = new Timestamp(zero);//本月第一天零点
    Timestamp timestamp = new Timestamp(twelve);//今日24点
}