joda-time 例子

joda-time

//Joda-Time 的一个小例子,计算一天的工作时间, 
//每天工作8小时,1小时休息: 

package com.alzhang.workingtime;

import org.joda.time.DateTime;
import org.joda.time.Duration;
import org.joda.time.Hours;
import org.joda.time.Period;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.PeriodFormatterBuilder;
import org.joda.time.format.PeriodPrinter;

public class Calculate {

    private static String TIME_PATTERN = "M/d/yyyy h:mm:ss a";
    private static Hours FORMAL_TIME = Hours.EIGHT;
    private static Hours RESET_TIME = Hours.ONE;
    private static DateTimeFormatter FORMATTER;
    private static PeriodPrinter PRINTER;
    
    static String simpleTime1 = "4/28/2010 8:50:26 AM";
    static String simpleTime2 = "4/28/2010 5:35:54 PM";
    
    
    static {
        FORMATTER = DateTimeFormat.forPattern(TIME_PATTERN);
        PRINTER = new PeriodFormatterBuilder().appendHours().appendSuffix(
                " hour", " hours").appendSeparator(" and ").appendMinutes()
                .appendSuffix(" min").appendSeparator(" ").appendSeconds()
                .appendSuffix(" second", " seconds").toPrinter();
    }
    
    /**
     * @param args
     */
    public static void main(String[] args) {
        DateTime start = FORMATTER.parseDateTime(simpleTime1);
        DateTime end = FORMATTER.parseDateTime(simpleTime2);
        
        long worked = new Duration(start, end).minus(FORMAL_TIME.plus(RESET_TIME).toStandardDuration()).getMillis();

        StringBuffer sb = new StringBuffer();
        
        if (worked < 0) {
            sb.append("Worked not enough! Still need work : ");
            PRINTER.printTo(sb, new Period(Math.abs(worked)), null);
        } else {
            sb.append("Good job! Worked : ");
            PRINTER.printTo(sb, new Period(Math.abs(worked)).plusHours(FORMAL_TIME.getHours()), null);
        }
        
        System.out.println(sb.toString());

    }
    
}

//修改了下,统计一周的工作时间: 
package com.alzhang.workingtime;

import org.apache.commons.lang.StringUtils;
import org.joda.time.Duration;
import org.joda.time.Hours;
import org.joda.time.Period;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.PeriodFormatterBuilder;
import org.joda.time.format.PeriodPrinter;

public class Calculate {

    private static final String TIME_PATTERN = "M/d/yyyy h:mm:ss a";
    private static final Hours FORMAL_TIME = Hours.EIGHT;
    private static final Hours RESET_TIME = Hours.ONE;
    private static final DateTimeFormatter FORMATTER;
    private static final PeriodPrinter PRINTER;
    
    private static String[][] times = {
        {"5/5/2010 10:53:54 AM", "5/5/2010 6:34:58 PM"},
        {"5/4/2010 9:44:58 AM", "5/4/2010 6:59:12 PM"},  
        {"", ""},
        {"", ""},
        {"", ""}};
    
    static {
        FORMATTER = DateTimeFormat.forPattern(TIME_PATTERN);
        PRINTER = new PeriodFormatterBuilder().appendHours().appendSuffix(
                " hour", " hours").appendSeparator(" and ").appendMinutes()
                .appendSuffix(" min").appendSeparator(" ").appendSeconds()
                .appendSuffix(" second", " seconds").toPrinter();
    }
    
    /**
     * @param args
     */
    public static void main(String[] args) {

        long worked = 0;
        
        for(String[] time : times)
            worked += getWorkedTimeForOneDay(time[0], time[1]);
        
        StringBuffer sb = new StringBuffer();
        
        if (worked < 0) {
            sb.append("Worked not enough! Still need work : ");
            printTime(new Period(Math.abs(worked)), sb);
        } else {
            sb.append("Good job! Worked : ");
            printTime(new Period(Math.abs(worked)).plusHours(FORMAL_TIME.getHours()), sb);
        }
        
        System.out.println(sb.toString());

    }

    private static void printTime(Period period, StringBuffer sb) {
        PRINTER.printTo(sb, period, null);
    }
    
    public static long getWorkedTimeForOneDay(String start, String end){
        
        if(StringUtils.isBlank(start) || StringUtils.isBlank(end))
            return - FORMAL_TIME.toStandardDuration().getMillis(); // you sucked all day
        
        return new Duration(FORMATTER.parseDateTime(start), FORMATTER.parseDateTime(end)).minus(FORMAL_TIME.plus(RESET_TIME).toStandardDuration()).getMillis();
        
    }
    
}