Java 如何找出两个日期之间的差异持续时间

我有两个日期，例如1989-3-21、2016-3-21，我想找出这些日期之间的差异持续时间。为此，我尝试了以下代码，但我无法获得日期差异的持续时间

public String getTimeDiff(Date dateOne, Date dateTwo) {
        String diff = "";
        long timeDiff = Math.abs(dateOne.getTime() - dateTwo.getTime());
        diff = String.format("%d hour(s) %d min(s)", TimeUnit.MILLISECONDS.toHours(timeDiff),
                TimeUnit.MILLISECONDS.toMinutes(timeDiff) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(timeDiff)));
        return diff;
}

从

---

在调用

公共字符串getTimeDiff（Date-dateOne，Date-dateTwo）

之前，像这样初始化日期：

    Date dateOne=null,dateTwo=null;
    try {
        dateOne = new SimpleDateFormat( "yyyy-MM-dd" ).parse("2016-3-21");
        dateTwo =  new SimpleDateFormat( "yyyy-MM-dd" ).parse("1989-3-21");
    } 
    catch (ParseException ex) {     
    }
    System.out.println( getTimeDiff(dateOne,dateTwo));



    public String getTimeDiff(Date dateOne, Date dateTwo) {
        String diff = "";
        long timeDiff = Math.abs(dateOne.getTime() - dateTwo.getTime());
        diff = String.format("%d date(s) ", TimeUnit.MILLISECONDS.toDays(timeDiff));
        return diff;
    }

由于日期不是默认格式，因此必须使用SimpleDataFormat来明确声明日期的格式。

尝试使用此选项

try {
            /// String CurrentDate=  "10/6/2016";
            /// String PrviousDate=  "10/7/2015";
            Date date1 = null;
            Date date2 = null;
            SimpleDateFormat df = new SimpleDateFormat("MM/dd/yyyy");
            date1 = df.parse(CurrentDate);
            date2 = df.parse(PrviousDate);
            long diff = Math.abs(date1.getTime() - date2.getTime());
            long diffDays = diff / (24 * 60 * 60 * 1000);


            System.out.println(diffDays);

        } catch (Exception e) {
            System.out.println("exception " + e);
        }

---

获取差异并调用方法； long diff=dt2.getTime（）-dt1.getTime（）

public static String toHumanReadableTime(long diff) {
        Long hour = TimeUnit.HOURS.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% (1000 * 60 * 60);
        Long minutes = TimeUnit.MINUTES.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% (1000 * 60);
        Long seconds = TimeUnit.SECONDS.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% 1000;
        Long milisec = diff;

        StringBuilder buffer = new StringBuilder();
        if (hour != null && hour > 0) {
            buffer.append(hour).append(" Hour ");
        }
        if (minutes != null && minutes > 0) {
            buffer.append(minutes).append(" Minute ");
        }
        buffer.append(seconds).append(" Second ");

        buffer.append(milisec).append(" Millisecond  ");

        return buffer.toString();
    }

---

java.text.ParseException可能重复：不可解析的日期：“1989-3-21”（偏移量5）此异常出现等待，让我试试你的逻辑，但我必须获得年数差异而不是小时数检查我的编辑，因为你想要日期差异，你还必须对函数进行一些更改。等等，让我试试你的逻辑

public static String toHumanReadableTime(long diff) {
        Long hour = TimeUnit.HOURS.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% (1000 * 60 * 60);
        Long minutes = TimeUnit.MINUTES.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% (1000 * 60);
        Long seconds = TimeUnit.SECONDS.convert(diff, TimeUnit.MILLISECONDS);
        diff= diff% 1000;
        Long milisec = diff;

        StringBuilder buffer = new StringBuilder();
        if (hour != null && hour > 0) {
            buffer.append(hour).append(" Hour ");
        }
        if (minutes != null && minutes > 0) {
            buffer.append(minutes).append(" Minute ");
        }
        buffer.append(seconds).append(" Second ");

        buffer.append(milisec).append(" Millisecond  ");

        return buffer.toString();
    }