java中如何比较时间大小 在java的程序里date类型怎么比较大小呀?
java\u4ee3\u7801\u4e2d\u600e\u4e48\u6bd4\u8f83\u65f6\u95f4\u7684\u5927\u5c0f\u6bd4\u8f83getTime\u83b7\u53d6\u7684\u6574\u6570\u503c\u5927\u5c0f\u5373\u53ef\uff0c\u6574\u6570\u503c\u5927\u7684\u65f6\u95f4\u5c31\u5927\uff0c\u6574\u6570\u503c\u5c0f\u7684\u65f6\u95f4\u5c31\u5c0f
\u4f8b\u5982\uff1a
public int compareDate(Date d1,Date d2){ if (dt1.getTime() > dt2.getTime()) { System.out.println("dt1 \u5728dt2\u524d"); return 1; } else if (dt1.getTime() < dt2.getTime()) { System.out.println("dt1\u5728dt2\u540e"); return -1; } else {//\u76f8\u7b49 return 0; } }
\u8fd8\u6709\uff1a
import java.text.SimpleDateFormat;import java.util.Date;public class Date_Test {public static void main(String[] args) {Date d1 = new Date(); //\u7b2c\u4e00\u4e2a\u65f6\u95f4Date d2 = new Date(); //\u7b2c\u4e8c\u4e2a\u65f6\u95f4SimpleDateFormat f = new SimpleDateFormat("hhmmss"); //\u683c\u5f0f\u5316\u4e3a hhmmssint d1Number = Integer.parseInt(f.format(d1).toString()); //\u5c06\u7b2c\u4e00\u4e2a\u65f6\u95f4\u683c\u5f0f\u5316\u540e\u8f6c\u4e3aintint d2Number = Integer.parseInt(f.format(d2).toString()); //\u5c06\u7b2c\u4e8c\u4e2a\u65f6\u95f4\u683c\u5f0f\u5316\u540e\u8f6c\u4e3aintif(d1Number>d2Number){System.out.println("\u65f6\u95f4d1\u5927");System.out.println(d1Number); }else{System.out.println("\u65f6\u95f4d2\u5927");System.out.println(d2Number);}}}
\u6709\u4e24\u4e2a\u65b9\u6cd5\uff1a
\u65b9\u6cd5\u4e00\uff1a
\u4e24\u4e2aDate\u7c7b\u578b\u7684\u53d8\u91cf\u53ef\u4ee5\u901a\u8fc7compareTo\u65b9\u6cd5\u6765\u6bd4\u8f83\u3002\u6b64\u65b9\u6cd5\u7684\u63cf\u8ff0\u662f\u8fd9\u6837\u7684\uff1a\u5982\u679c\u53c2\u6570 Date \u7b49\u4e8e\u6b64 Date\uff0c\u5219\u8fd4\u56de\u503c 0\uff1b\u5982\u679c\u6b64 Date \u5728 Date \u53c2\u6570\u4e4b\u524d\uff0c\u5219\u8fd4\u56de\u5c0f\u4e8e 0 \u7684\u503c\uff1b\u5982\u679c\u6b64 Date \u5728 Date \u53c2\u6570\u4e4b\u540e\uff0c\u5219\u8fd4\u56de\u5927\u4e8e 0 \u7684\u503c\u3002
\u65b9\u5f0f\u4e8c\uff1a
Date.after\uff08\uff09\u8fd9\u6837\u7684\u65b9\u5f0f\u4e0d\u80fd\u6bd4\u8f83\u51fa\u76f8\u7b49\u7684\u65f6\u95f4\u3002
\u6269\u5c55\u8d44\u6599\uff1a
Date\u7c7b\u53ef\u4ee5\u5728java.util\u5305\u4e2d\u627e\u5230\uff0c\u7528\u4e00\u4e2along\u7c7b\u578b\u7684\u503c\u8868\u793a\u4e00\u4e2a\u6307\u5b9a\u7684\u65f6\u523b\u3002\u5b83\u7684\u4e00\u4e2a\u6709\u7528\u7684\u6784\u9020\u51fd\u6570\u662fDate(),\u5b83\u521b\u5efa\u4e00\u4e2a\u8868\u793a\u521b\u5efa\u65f6\u523b\u7684\u5bf9\u8c61\u3002
getTime()\u65b9\u6cd5\u8fd4\u56deDate\u5bf9\u8c61\u7684long\u503c\u3002\u5728\u4e0b\u9762\u7684\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4f7f\u7528Date()\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u8868\u793a\u7a0b\u5e8f\u8fd0\u884c\u65f6\u523b\u7684\u5bf9\u8c61\uff0c\u5e76\u4e14\u5229\u7528getTime()\u65b9\u6cd5\u627e\u5230\u8fd9\u4e2a\u65e5\u671f\u4ee3\u8868\u7684\u6beb\u79d2\u6570\u91cf\uff1a
import java.util.*;
public class Now {
public static void main(String[] args) {
Date now = new Date();
long nowLong = now.getTime();
System.out.println("Value is " + nowLong);
}
}
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1\u2014\u2014java\u65e5\u671f\u51fd\u6570
换算成long型的相减就可以了
时间轴比较！
换算成毫秒值再比较
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绛旓細java.util.Date nows=new java.util.Date();java.util.Date date=dateFormat.parse("2005-09-12 12:36:29");long hous=(nows.getTime()-date.getTime())/(60*60*1000);杞崲鎴恖ong鍦姣旇緝 鍙互寰楀埌鏃ユ湡鐩稿樊鐨勬椂闂 脳脳脳 date1, date2;long l1=date1.getTime()...
