JavaScript日期工具类DateUtils定义与用法示例
本文实例讲述了JavaScript日期工具类DateUtils定义与用法。分享给大家供大家参考，具体如下：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | DateUtils = { patterns: { PATTERN_ERA: 'G', //Era 标志符 Era strings. For example: "AD" and "BC" PATTERN_YEAR: 'y', //年 PATTERN_MONTH: 'M', //月份 PATTERN_DAY_OF_MONTH: 'd', //月份的天数 PATTERN_HOUR_OF_DAY1: 'k', //一天中的小时数（1-24） PATTERN_HOUR_OF_DAY0: 'H', //24小时制，一天中的小时数（0-23） PATTERN_MINUTE: 'm', //小时中的分钟数 PATTERN_SECOND: 's', //秒 PATTERN_MILLISECOND: 'S', //毫秒 PATTERN_DAY_OF_WEEK: 'E', //一周中对应的星期，如星期一，周一 PATTERN_DAY_OF_YEAR: 'D', //一年中的第几天 PATTERN_DAY_OF_WEEK_IN_MONTH: 'F', //一月中的第几个星期(会把这个月总共过的天数除以7,不够准确，推荐用W) PATTERN_WEEK_OF_YEAR: 'w', //一年中的第几个星期 PATTERN_WEEK_OF_MONTH: 'W', //一月中的第几星期(会根据实际情况来算) PATTERN_AM_PM: 'a', //上下午标识 PATTERN_HOUR1: 'h', //12小时制 ，am/pm 中的小时数（1-12） PATTERN_HOUR0: 'K', //和h类型 PATTERN_ZONE_NAME: 'z', //时区名 PATTERN_ZONE_VALUE: 'Z', //时区值 PATTERN_WEEK_YEAR: 'Y', //和y类型 PATTERN_ISO_DAY_OF_WEEK: 'u', PATTERN_ISO_ZONE: 'X' }, week: { 'ch': { "0": "\u65e5", "1": "\u4e00", "2": "\u4e8c", "3": "\u4e09", "4": "\u56db", "5": "\u4e94", "6": "\u516d" }, 'en': { "0": "Sunday", "1": "Monday", "2": "Tuesday", "3": "Wednesday", "4": "Thursday", "5": "Friday", "6": "Saturday" } }, //获取当前时间 getCurrentTime: function() { var today = new Date(); var year = today.getFullYear(); var month = today.getMonth() + 1; var day = today.getDate(); var hours = today.getHours(); var minutes = today.getMinutes(); var seconds = today.getSeconds(); var timeString = year + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds; return timeString; }, /* * 比较时间大小 * time1>time2 return 1 * time1<time2 return -1 * time1==time2 return 0 */ compareTime: function(time1, time2) { if(Date.parse(time1.replace(/-/g, "/")) > Date.parse(time2.replace(/-/g, "/"))) { return 1; } else if(Date.parse(time1.replace(/-/g, "/")) < Date.parse(time2.replace(/-/g, "/"))) { return -1; } else if(Date.parse(time1.replace(/-/g, "/")) == Date.parse(time2.replace(/-/g, "/"))) { return 0; } }, //是否闰年 isLeapYear: function(year) { return((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0); }, //获取某个月的天数，从0开始 getDaysOfMonth: function(year, month) { return [31, (this.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month]; }, getDaysOfMonth2: function(year, month) { // 将天置为0，会获取其上个月的最后一天 month = parseInt(month) + 1; var date = new Date(year, month, 0); return date.getDate(); }, /*距离现在几天的日期：负数表示今天之前的日期，0表示今天，整数表示未来的日期 * 如-1表示昨天的日期，0表示今天，2表示后天 */ fromToday: function(days) { var today = new Date(); today.setDate(today.getDate() + days); var date = today.getFullYear() + "-" + (today.getMonth() + 1) + "-" + today.getDate(); return date; }, /** * 日期时间格式化 * @param {Object} dateTime 需要格式化的日期时间 * @param {String} pattern 格式化的模式，如yyyy-MM-dd hh(HH):mm:ss.S a k K E D F w W z Z */ formt: function(dateTime, pattern) { var date = new Date(dateTime); if(Bee.StringUtils.isBlank(pattern)) { return date.toLocaleString(); } return pattern.replace(/([a-z])\1*/ig, function(matchStr, group1) { var replacement = ""; switch(group1) { case Bee.DateUtils.patterns.PATTERN_ERA: //G break; case Bee.DateUtils.patterns.PATTERN_WEEK_YEAR: //Y case Bee.DateUtils.patterns.PATTERN_YEAR: //y replacement = date.getFullYear(); break; case Bee.DateUtils.patterns.PATTERN_MONTH: //M var month = date.getMonth() + 1; replacement = (month < 10 && matchStr.length >= 2) ? "0" + month : month; break; case Bee.DateUtils.patterns.PATTERN_DAY_OF_MONTH: //d var days = date.getDate(); replacement = (days < 10 && matchStr.length >= 2) ? "0" + days : days; break; case Bee.DateUtils.patterns.PATTERN_HOUR_OF_DAY1: //k(1~24) var hours24 = date.getHours(); replacement = hours24; break; case Bee.DateUtils.patterns.PATTERN_HOUR_OF_DAY0: //H(0~23) var hours24 = date.getHours(); replacement = (hours24 < 10 && matchStr.length >= 2) ? "0" + hours24 : hours24; break; case Bee.DateUtils.patterns.PATTERN_MINUTE: //m var minutes = date.getMinutes(); replacement = (minutes < 10 && matchStr.length >= 2) ? "0" + minutes : minutes; break; case Bee.DateUtils.patterns.PATTERN_SECOND: //s var seconds = date.getSeconds(); replacement = (seconds < 10 && matchStr.length >= 2) ? "0" + seconds : seconds; break; case Bee.DateUtils.patterns.PATTERN_MILLISECOND: //S var milliSeconds = date.getMilliseconds(); replacement = milliSeconds; break; case Bee.DateUtils.patterns.PATTERN_DAY_OF_WEEK: //E var day = date.getDay(); replacement = Bee.DateUtils.week['ch'][day]; break; case Bee.DateUtils.patterns.PATTERN_DAY_OF_YEAR: //D replacement = Bee.DateUtils.dayOfTheYear(date); break; case Bee.DateUtils.patterns.PATTERN_DAY_OF_WEEK_IN_MONTH: //F var days = date.getDate(); replacement = Math.floor(days / 7); break; case Bee.DateUtils.patterns.PATTERN_WEEK_OF_YEAR: //w var days = Bee.DateUtils.dayOfTheYear(date); replacement = Math.ceil(days / 7); break; case Bee.DateUtils.patterns.PATTERN_WEEK_OF_MONTH: //W var days = date.getDate(); replacement = Math.ceil(days / 7); break; case Bee.DateUtils.patterns.PATTERN_AM_PM: //a var hours24 = date.getHours(); replacement = hours24 < 12 ? "\u4e0a\u5348" : "\u4e0b\u5348"; break; case Bee.DateUtils.patterns.PATTERN_HOUR1: //h(1~12) var hours12 = date.getHours() % 12 || 12; //0转为12 replacement = (hours12 < 10 && matchStr.length >= 2) ? "0" + hours12 : hours12; break; case Bee.DateUtils.patterns.PATTERN_HOUR0: //K(0~11) var hours12 = date.getHours() % 12; replacement = hours12; break; case Bee.DateUtils.patterns.PATTERN_ZONE_NAME: //z replacement = Bee.DateUtils.getZoneNameValue(date)['name']; break; case Bee.DateUtils.patterns.PATTERN_ZONE_VALUE: //Z replacement = Bee.DateUtils.getZoneNameValue(date)['value']; break; case Bee.DateUtils.patterns.PATTERN_ISO_DAY_OF_WEEK: //u break; case Bee.DateUtils.patterns.PATTERN_ISO_ZONE: //X break; default: break; } return replacement; }); }, /** * 计算一个日期是当年的第几天 * @param {Object} date */ dayOfTheYear: function(date) { var obj = new Date(date); var year = obj.getFullYear(); var month = obj.getMonth(); //从0开始 var days = obj.getDate(); var daysArr = [31, (this.isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; for(var i = 0; i < month; i++) { days += daysArr[i]; } return days; }, //获得时区名和值 getZoneNameValue: function(dateObj) { var date = new Date(dateObj); date = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate())); var arr = date.toString().match(/([A-Z]+)([-+]\d+:?\d+)/); var obj = { 'name': arr[1], 'value': arr[2] }; return obj; } }; //用法示例 console.log(DateUtils.getCurrentTime())//获取当前时间 console.log(DateUtils.compareTime('2018-8-1','2018-9-3'))//比较时间 console.log(DateUtils.isLeapYear('2018'))//是否闰年 console.log(DateUtils.getDaysOfMonth('2018','9'))//获取指定月份的天数（从0计数） console.log(DateUtils.dayOfTheYear('2018-9-3'))//计算指定日期是当年第几天 |
使用在线HTML/CSS/JavaScript代码运行工具：http://tools.jb51.net/code/HtmlJsRun测试运行结果如下：
