[java]利用Calendar返回指定日期的字符串

布满荆棘的人生 2022-02-19 09:21 326阅读 0赞

另外还有一篇关于时间的操作集合(持续更新):  
[时间类方法的使用整合][Link 1]

/**
    	 * 返回当前月第一天
    	 * @return
    	 */
    	public static String getNowMonthBeginTime(){
    		Calendar cal = Calendar.getInstance(); 
    		int year = cal.get(Calendar.YEAR);
    		int month = cal.get(Calendar.MONTH);
    		String str = year+"-"+(month+1)+"-01 00:00:00";
    		if(month+1<10){
    			str = year+"-0"+(month+1)+"-01 00:00:00";
    		}		
    		return str;
    	}
    	
    	/**
    	 * 返回当前年上半年第一天
    	 * @return
    	 */
    	public static String getNowYearBeginTime(){
    		Calendar cal = Calendar.getInstance(); 
    		int year = cal.get(Calendar.YEAR);
    		String str = year+"-01-01 00:00:00";
    		return str;
    	}
    	
    	/**
    	 * 返回当前年上半年最后第一天
    	 * @return
    	 */
    	public static String getNowYearEndTime(){
    		Calendar cal = Calendar.getInstance(); 
    		int year = cal.get(Calendar.YEAR);
    		String str = year+"-06-30 23:59:59";
    		return str;
    	}
    	
    		
    	/**
    	 * 返回去年第一天
    	 * @return
    	 */
    	public static String getLastYearBeginTime(){
    		Calendar cal = Calendar.getInstance(); 
    		int year = cal.get(Calendar.YEAR);
    		String str = (year-1)+"-01-01 00:00:00";
    		return str;
    	}
    	
    	/**
    	 * 返回去年最后一天
    	 * @return
    	 */
    	public static String getLastYearEndTime(){
    		Calendar cal = Calendar.getInstance(); 
    		int year = cal.get(Calendar.YEAR);
    		String str = (year-1)+"-12-31 23:59:59";
    		return str;
    	}

[Link 1]: https://blog.csdn.net/a755199443/article/details/89319715