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類似于Java日期格式化的JavaScript實現

/**
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@author:Pancras
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@version:1.01
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@date:2008-03-02
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@methods:
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DateUtil.getDate(year,month,day) 輸入參數為年、月、日，返回一個JS的Date型對象
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DateUtil.formateDate(pattern,date) 輸入參數一個是格式化字符串，比如"yyyy-MM-dd"，和JS日期對象，輸出格式化后的日期字符串（基本上和Java的格式化類似）
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DateUtil.formateDateTime(pattern,date) 參數類型同上，但是該方法是在要格式化包含時間的時候使用，如"yyyy-MM-dd HH-mm-ss"
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DateUtil.isLeapYear(date) 輸入一個JS日期型參數，判斷該日期所在的年是不是閏年
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**/
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function DateUtil(){
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alert("請不要new這個對象，所有方法都是可以通過DateUtil.方法名來調用");
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}
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//-------------------------------------------
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//定義類方法getDate(year,month,day)創建對應的日期對象
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function getDate(year,month,day)
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{
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var date = new Date();
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if(year)
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{
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date.setYear(year);
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}
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if(month)
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{
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date.setMonth(month-1);
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}
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if(day)
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{
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date.setDate(day);
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}
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return date;
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}
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DateUtil.getDate=getDate;
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//-------------------------------------------
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//定義日期時間格式化
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DateUtil.yearPattern = [new RegExp("y{4}","g"),new RegExp("y{3}","g"),new RegExp("y{2}","g")];
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DateUtil.monthPattern = [new RegExp("M{2}","g"),new RegExp("M{1}","g")];
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DateUtil.datePattern = [new RegExp("d{2}","g"),new RegExp("d{1}","g")];
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DateUtil.hourPattern=[new RegExp("H{2}","g"),new RegExp("H{1}","g"),new RegExp("h{2}","g"),new RegExp("h{1}","g")];
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DateUtil.minutePattern=[new RegExp("m{2}","g"),new RegExp("m{1}","g")];
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DateUtil.secondPattern=[new RegExp("s{2}","g"),new RegExp("s{1}","g")];
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//格式化年
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function formatYear(pattern,year)
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{
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var result = pattern.match(DateUtil.yearPattern[0]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.yearPattern[0],year);
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return pattern;
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}else {
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//不允許匹配成yyy
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result = pattern.match(DateUtil.yearPattern[1]);
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if(result!=null){
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throw "Unknown pattern:"+pattern;
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}else {
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result = pattern.match(DateUtil.yearPattern[2]);
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if(result!=null)
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{
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pattern = pattern.replace(DateUtil.yearPattern[2],(""+year).substring(2,4));
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return pattern;
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}
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}
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}
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}
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//格式化月
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function formatMonth(pattern,month)
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{
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var result = pattern.match(DateUtil.monthPattern[0]);
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if(result!=null){
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if(month<10)
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{
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month = "0"+month;
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}
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pattern = pattern.replace(DateUtil.monthPattern[0],month);
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return pattern;
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}else
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{
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result = pattern.match(DateUtil.monthPattern[1]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.monthPattern[1],month);
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return pattern;
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}
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else{
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throw "Unknown pattern:"+pattern;
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}
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}
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}
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//格式化日期
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function formatDay(pattern,day)
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{
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var result = pattern.match(DateUtil.datePattern[0]);
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if(result!=null){
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if(day<10)
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{
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day = "0"+day;
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}
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pattern = pattern.replace(DateUtil.datePattern[0],day);
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return pattern;
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}else
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{
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result = pattern.match(DateUtil.datePattern[1]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.datePattern[1],day);
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return pattern;
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}
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else{
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throw "Unknown pattern:"+pattern;
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}
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115

}
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}
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//格式化小時
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function formatHour(pattern,hour)
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{
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var result = pattern.match(DateUtil.hourPattern[0]);
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if(result!=null){
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if(hour<10)
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{
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hour = "0"+hour;
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}
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pattern = pattern.replace(DateUtil.hourPattern[0],hour);
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return pattern;
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}else
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{
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result = pattern.match(DateUtil.hourPattern[1]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.hourPattern[1],hour);
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return pattern;
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}
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else{
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result = pattern.match(DateUtil.hourPattern[2]);
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if(result!=null){
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if(hour<10)
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{
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hour = "0"+hour;
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}
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if(hour>12)
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{
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hour = hour-12;
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}
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pattern = pattern.replace(DateUtil.hourPattern[2],hour);
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return pattern;
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}else{
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result = pattern.match(DateUtil.hourPattern[3]);
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if(result!=null){
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if(hour>12)
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{
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hour = hour-12;
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}
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pattern = pattern.replace(DateUtil.hourPattern[3],hour);
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return pattern;
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}else{
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throw "Unknown pattern:"+pattern;
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}
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}
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162

}
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}
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}
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//格式化分鐘
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function formatMinute(pattern,minute)
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{
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var result = pattern.match(DateUtil.minutePattern[0]);
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if(result!=null){
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if(minute<10)
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{
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minute = "0"+minute;
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}
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pattern = pattern.replace(DateUtil.minutePattern[0],minute);
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return pattern;
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}else
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{
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result = pattern.match(DateUtil.minutePattern[1]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.minutePattern[1],minute);
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return pattern;
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}
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else{
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throw "Unknown pattern:"+pattern;
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}
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}
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}
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//格式化秒
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function formatSecond(pattern,second)
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{
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var result = pattern.match(DateUtil.secondPattern[0]);
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if(result!=null){
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if(second<10)
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{
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second = "0"+second;
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}
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pattern = pattern.replace(DateUtil.secondPattern[0],second);
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return pattern;
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}else
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{
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result = pattern.match(DateUtil.secondPattern[1]);
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if(result!=null){
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pattern = pattern.replace(DateUtil.secondPattern[1],second);
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return pattern;
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}
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else{
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throw "Unknown pattern:"+pattern;
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}
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}
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}
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function formateDate(pattern,date)
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{
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var oldpattern = pattern;
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try{
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pattern = formatYear(pattern,DateUtil.getYear(date));
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pattern = formatMonth(pattern,DateUtil.getMonth(date));
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pattern = formatDay(pattern,DateUtil.getDay(date));
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return pattern;
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}catch(err){
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if(err.match("Unknown pattern")){
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alert("Unknown pattern:"+oldpattern);
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}else{
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alert(err);
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}
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}
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}
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function formateDateTime(pattern,date)
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{
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var oldpattern = pattern;
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try{
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pattern = DateUtil.formateDate(pattern,date);
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pattern = formatHour(pattern,date.getHours());
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pattern = formatMinute(pattern,date.getMinutes());
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pattern = formatSecond(pattern,date.getSeconds());
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return pattern;
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}catch(err){
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if(err.match("Unknown pattern")){
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alert("Unknown pattern:"+oldpattern);
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}else{
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alert(err);
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}
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}
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}
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DateUtil.formateDate = formateDate;
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DateUtil.formateDateTime = formateDateTime;
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//-------------------------------------------
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//是不是閏年
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function isLeapYear(date)
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{
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var year = DateUtil.getYear();
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if(year%100==0)
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{
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if(year%400==0)
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{
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return true;
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}
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}
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if(year%100!=0)
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{
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if(year%4==0)
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{
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return true;
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}
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}
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return false;
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}
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DateUtil.isLeapYear = isLeapYear;

posted on 2008-03-02 13:49 pancras 閱讀(2914) 評論(3) 編輯收藏

# re: 類似于Java日期格式化的JavaScript實現 2008-03-02 14:31 xifu

# re: 類似于Java日期格式化的JavaScript實現 2008-03-02 15:04 pancras

# re: 類似于Java日期格式化的JavaScript實現 2008-03-03 10:14 jeasonzhao

類似于Java日期格式化的JavaScript實現

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