考勤計算

java 代碼

package net.ensode.jasperbook;

import java.text.DecimalFormat;
/***
 *
 * @author zhangem
 *
 */
public class test {
 public static void main(String[] str){
     System.out.println(getTime(9, 12, 8, 23));//計算上午有效時間
     System.out.println(getTime(13, 18, 8, 23));//計算下午有效時間

     System.out.println(getTime(9, 12, 19, 23)+getTime(13, 18, 19, 23)); //一天有效時間之和
 }

    //begin 上班時間,end 下班時間,come 簽到時間,go 簽出時間
    public static double getTime(double begin,double end,double come,double go){
        DecimalFormat df = new DecimalFormat("00.00");
        double a1 = (go-begin)>0?(go-begin):0;
        double a2 = (come-begin)>0?(come-begin):0;
        double c  = a1-a2;
        double d = (go-end)>0?(go-end):0;
        double result = (c-d)>0?(c-d):0;
        return  Double.valueOf(df.format(result));
    }

}