SalaryTool.java

package cn.timer.api.controller.xcgl;

import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class SalaryTool {
	static SimpleDateFormat mat = new SimpleDateFormat("yyyy-MM-dd");
	static SimpleDateFormat matM = new SimpleDateFormat("yyyy-MM");
	
	/**
     * 保留两位小数，四舍五入的一个老土的方法
     * @param d
     * @return
     */
    public static double formatDouble(double d) {
        return (double)Math.round(d*10000)/10000;
    }
    
    public static double formatDouble_(double d) {
    	double zhi = 0;
    	DecimalFormat df = new DecimalFormat("0.00");
    	zhi = Double.valueOf(df.format(d));
    	return zhi;
    }
	
   /** 
    * 获取两个日期相差的月数 
    * @param d2  较大的日期 
    * @param d1  较小的日期 
    * @return 如果d1>d2返回 月数差 否则返回0 
    */ 
    public static int getMonthDiff(String d1, String d2)throws ParseException { 
        Calendar c1 = Calendar.getInstance(); 
        Calendar c2 = Calendar.getInstance();

        //将String日期转换成date
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); 
        java.util.Date date1=sdf.parse(d1); 
        java.util.Date date2=sdf.parse(d2); 
        c1.setTime(date1); 
        c2.setTime(date2);

       //判断两个日期的大小
        if(c2.getTimeInMillis() < c1.getTimeInMillis()) return 0; 
        int year1 = c1.get(Calendar.YEAR); 
        int year2 = c2.get(Calendar.YEAR); 
        int month1 = c1.get(Calendar.MONTH); 
        int month2 = c2.get(Calendar.MONTH); 
        int day1 = c1.get(Calendar.DAY_OF_MONTH); 
        int day2 = c2.get(Calendar.DAY_OF_MONTH); 
        // 获取年的差值 假设 d1 = 2015-9-30   d2 = 2015-12-16 
        int yearInterval = year2 - year1; 
        // 如果 d1的 月-日 小于 d2的 月-日 那么 yearInterval-- 这样就得到了相差的年数 
        if(month2 < month1 || month1 == month2 && day2 < day1) yearInterval --; 
        // 获取月数差值 
        int monthInterval = (month2 + 12) - month1 ; 
        if(day2 > day1) monthInterval ++; 
        monthInterval %= 12; 
        return yearInterval * 12 + monthInterval + 1; 
    } 
	
	public static Date strToDateLong(String strDate) {
		SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		ParsePosition pos = new ParsePosition(0);
		Date strtodate = formatter.parse(strDate, pos);
		return strtodate;
	}
	
	// 上个月
		public static String getfirstlastTwo(String time) {
			String firstnext;
			Calendar c1 = Calendar.getInstance();
			c1.setTime(strToDateLong(time)); // 设置为当前时间
			c1.add(Calendar.MONTH, -1);
			c1.set(Calendar.DAY_OF_MONTH, 1);
			firstnext = mat.format(c1.getTime());
			return firstnext;
		}
		public static String getlastlastTwo(String time) {
			String lastnext;
			Calendar ca1 = Calendar.getInstance();
			ca1.setTime(strToDateLong(time)); // 设置为当前时间
			ca1.add(Calendar.MONTH, -1);
			ca1.set(Calendar.DAY_OF_MONTH, ca1.getActualMaximum(Calendar.DAY_OF_MONTH));
			lastnext = mat.format(ca1.getTime());
			return lastnext;
		}
		
		// 本月
		public static String getfirstnowTwo(String time) {
			String firstnow;
			Calendar c = Calendar.getInstance();
			c.setTime(strToDateLong(time)); // 设置为当前时间
			c.add(Calendar.MONTH, 0);
			c.set(Calendar.DAY_OF_MONTH, 1);
			firstnow = mat.format(c.getTime());
			return firstnow;
		}
		public static String getlastnowTwo(String time) {
			String lastnow;
			Calendar ca = Calendar.getInstance();
			ca.setTime(strToDateLong(time)); // 设置为当前时间
			ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));
			lastnow = mat.format(ca.getTime());
			return lastnow;
		}
		
		// 下个月
		public static String getfirstnextTwo(String time) {
			String firstnext;
			Calendar c1 = Calendar.getInstance();
			c1.setTime(strToDateLong(time)); // 设置为当前时间
			c1.add(Calendar.MONTH, 1);
			c1.set(Calendar.DAY_OF_MONTH, 1);
			firstnext = mat.format(c1.getTime());
			return firstnext;
		}
		public static String getlastnextTwo(String time) {
			String lastnext;
			Calendar ca1 = Calendar.getInstance();
			ca1.setTime(strToDateLong(time)); // 设置为当前时间
			ca1.add(Calendar.MONTH, 1);
			ca1.set(Calendar.DAY_OF_MONTH, ca1.getActualMaximum(Calendar.DAY_OF_MONTH));
			lastnext = mat.format(ca1.getTime());
			return lastnext;
		}
		
		/**
	     * 	根据 年、月 获取对应的月份 的 天数
	     */
		 public static int getDaysByYearMonth(int year, int month)
		 {
		     Calendar a = Calendar.getInstance();
		     a.set(Calendar.YEAR, year);
		     a.set(Calendar.MONTH, month - 1);
		     a.set(Calendar.DATE, 1);
		     a.roll(Calendar.DATE, -1);
		     int maxDate = a.get(Calendar.DATE);
		     return maxDate;
		 }
		
		 /**
		 *	 获取月份起始日期
		 * 
		 * @param date
		 * @return
		 * @throws ParseException
		 */
		public static String getMinMonthDate(String date) throws ParseException {
			Calendar calendar = Calendar.getInstance();
			calendar.setTime(mat.parse(date));
			calendar.set(Calendar.DAY_OF_MONTH,
					calendar.getActualMinimum(Calendar.DAY_OF_MONTH));
			return mat.format(calendar.getTime());
		}

		/**
		 *	 获取月份最后日期
		 * 
		 * @param date
		 * @return
		 * @throws ParseException
		 */
		public static String getMaxMonthDate(String date) throws ParseException {
			Calendar calendar = Calendar.getInstance();
			calendar.setTime(mat.parse(date));
			calendar.set(Calendar.DAY_OF_MONTH,
					calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
			return mat.format(calendar.getTime());
		}
		
		
		// 下个月
		public static String getfirstnextMo(String time) {
			String firstnext;
			Calendar c1 = Calendar.getInstance();
			c1.setTime(strToDateLong(time)); // 设置为当前时间
			c1.add(Calendar.MONTH, 1);
			c1.set(Calendar.DAY_OF_MONTH, 1);
			firstnext = matM.format(c1.getTime());
			return firstnext;
		}
		
		// 上个月
		public static String getfirstlastMo(String time) {
			String firstnext;
			Calendar c1 = Calendar.getInstance();
			c1.setTime(strToDateLong(time)); // 设置为当前时间
			c1.add(Calendar.MONTH, -1);
			c1.set(Calendar.DAY_OF_MONTH, 1);
			firstnext = matM.format(c1.getTime());
			return firstnext;
		}
	//##################################################################################################################################
	
	// 上个月
	public static String getfirstlast() {
		String firstnext;
		Calendar c1 = Calendar.getInstance();
		c1.add(Calendar.MONTH, -1);
		c1.set(Calendar.DAY_OF_MONTH, 1);
		firstnext = mat.format(c1.getTime());
		return firstnext;
	}

	public static String getlastlast() {
		String lastnext;
		Calendar ca1 = Calendar.getInstance();
		ca1.add(Calendar.MONTH, -1);
		ca1.set(Calendar.DAY_OF_MONTH, ca1.getActualMaximum(Calendar.DAY_OF_MONTH));
		lastnext = mat.format(ca1.getTime());
		return lastnext;
	}

	// 本月
	public static String getfirstnow() {
		String firstnow;
		Calendar c = Calendar.getInstance();
		c.add(Calendar.MONTH, 0);
		c.set(Calendar.DAY_OF_MONTH, 1);
		firstnow = mat.format(c.getTime());
		return firstnow;
	}

	public static String getlastnow() {
		String lastnow;
		Calendar ca = Calendar.getInstance();
		ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));
		lastnow = mat.format(ca.getTime());
		return lastnow;
	}

	// 下个月
	public static String getfirstnext() {
		String firstnext;
		Calendar c1 = Calendar.getInstance();
		c1.add(Calendar.MONTH, 1);
		c1.set(Calendar.DAY_OF_MONTH, 1);
		firstnext = mat.format(c1.getTime());
		return firstnext;
	}

	public static String getlastnext() {
		String lastnext;
		Calendar ca1 = Calendar.getInstance();
		ca1.add(Calendar.MONTH, 1);
		ca1.set(Calendar.DAY_OF_MONTH, ca1.getActualMaximum(Calendar.DAY_OF_MONTH));
		lastnext = mat.format(ca1.getTime());
		return lastnext;
	}
}