java两个日期之间的差异

我需要帮助。我有两次约会

private Date endDate;
private Date now;

public String getRemainingTime(endDate) {
   now = new Date();

   //logic

}

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

我还有一个方法，它应该返回字符串格式中两个日期之间的差异，如果差异超过1天，例如“1天15分钟”

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

如果差异大于1小时但小于1天，则以“1小时13分钟”为例

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

如果差值小于1小时-“35分39秒”，类似这样的

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

请帮帮我，我不熟悉java

该库可能符合您的需要：

DateTime now
DateTime endDate;
Period p = new Period(now, endDate);
long hours = p.getHours();
long minutes = p.getMinutes();

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

---

如果“建议的评论”链接不起作用，请尝试以下操作： `

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

---

`

更新

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

1）此代码将完成此任务（编译器将包装常量）：

Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

公共字符串getIntervalAsString（日期date1，日期date2）{
字符串格式；
long dT=date2.getTime（）-date1.getTime（）；
如果（dT<1000*60）
format=“s‘sec’”；
否则如果（dT<1000*60*60）
format=“m‘min’s‘sec’；
否则如果（dT<1000*60*60*24）
format=“h”小时“m”分钟”；
否则如果（dT<1000*60*60*24*365）
format=“d”天“h”小时”；
其他的
格式=“超过一年”；
SimpleDataFormat格式化程序=新的SimpleDataFormat（格式）；
返回格式化程序.format（新日期（dT））；
}

2）您可以尝试不同的模式

私有静态最终长毫秒每秒=1000L；
Date endDate;
         Date now;
         StringBuilder sb = new StringBuilder();
        //timestamp difference in millis 
        Long diff = endaDate.getTime() - now.getTime();
        //get the seconds
        long seconds = diff / 1000;
        //get the minutes
        long minutes = diff / (1000 * 60);
        //get the hours
        long hrs = diff / (1000 * 60 * 60);
        if (hrs > 0) {
            sb.append(hrs + " hrs");
            if (minutes % 60 > 0) {
                sb.append(", " + minutes % 60 + " mins");
            }
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (minutes % 60 > 0) {
            sb.append(minutes % 60 + " mins");
            if (seconds % 60 > 0) {
                sb.append(", " + seconds % 60 + " secs");
            }
        } else if (seconds % 60 > 0) {
            sb.append(seconds % 60 + " secs");
        } else {
            sb.append("00");
        }
        System.out.println(sb.toString());

专用静态最终长毫/分=毫/秒*60L；
专用静态最终长毫/小时=毫/分钟*60L；
专用静态最终长毫/天=毫/小时*24L；
公共字符串getRemainingTime（日期endDate）{
long remain=endDate.getTime（）-System.currentTimeMillis（）；
如果（保持0升）{
附加（天）；
}
如果（小时>0升| |天>0升）{
附加（小时）附加（小时）；
}
如果（分钟>0升| |天>0升| |小时>0升）{
附加（分钟）；
}
如果（秒>0升）{
附加（秒）附加（秒）；
}
使某人返回字符串（）；
}

类似这样的问题可能重复。。一种可能的解决方案可能是更加熟悉Java。这有助于使用它进行编程……您可能希望了解定义持续时间的明确字符串表示形式的标准：

P[n]Y[n]M[n]DT[n]H[n]M[n]S

。Joda Time和java.Time库都可以解析和生成这些字符串。当我们有非常好的常用库（如Joda Time和java.Time）时，滚动自己的代码是个坏主意。这对于复杂且容易出错的日期-时间工作尤其如此。主要工作由属于java.text的SimpleDataFormat完成。在需要几行代码的情况下，附加非标准库是多余的（就apk的大小而言）。