How to convert strings and dates to each other and format dates in JS

这篇文章主要介绍了JavaScript实现字符串与日期的互相转换及日期的格式化的方法,这里格式化使用的是正则表达式来替换日期后进行格式化,需要的朋友可以参考下

字符串转日期、日期转字符串

// 2014-02-25 
 
/** 
   * 字符串转时间（yyyy-MM-dd HH:mm:ss） 
   * result （分钟） 
   */  
  stringToDate : function(fDate){  
    var fullDate = fDate.split("-");  
    
    return new Date(fullDate[0], fullDate[1]-1, fullDate[2], 0, 0, 0);  
  } 
 
 
/** 
     * 格式化日期 
     * @param date 日期 
     * @param format 格式化样式,例如yyyy-MM-dd HH:mm:ss E 
     * @return 格式化后的金额 
     */ 
    formatDate : function (date, format) { 
      var v = ""; 
      if (typeof date == "string" || typeof date != "object") { 
        return; 
      } 
      var year  = date.getFullYear(); 
      var month  = date.getMonth()+1; 
      var day   = date.getDate(); 
      var hour  = date.getHours(); 
      var minute = date.getMinutes(); 
      var second = date.getSeconds(); 
      var weekDay = date.getDay(); 
      var ms   = date.getMilliseconds(); 
      var weekDayString = ""; 
       
      if (weekDay == 1) { 
        weekDayString = "星期一"; 
      } else if (weekDay == 2) { 
        weekDayString = "星期二"; 
      } else if (weekDay == 3) { 
        weekDayString = "星期三"; 
      } else if (weekDay == 4) { 
        weekDayString = "星期四"; 
      } else if (weekDay == 5) { 
        weekDayString = "星期五"; 
      } else if (weekDay == 6) { 
        weekDayString = "星期六"; 
      } else if (weekDay == 7) { 
        weekDayString = "星期日"; 
      } 
 
      v = format; 
      //Year 
      v = v.replace(/yyyy/g, year); 
      v = v.replace(/YYYY/g, year); 
      v = v.replace(/yy/g, (year+"").substring(2,4)); 
      v = v.replace(/YY/g, (year+"").substring(2,4)); 
 
      //Month 
      var monthStr = ("0"+month); 
      v = v.replace(/MM/g, monthStr.substring(monthStr.length-2)); 
 
      //Day 
      var dayStr = ("0"+day); 
      v = v.replace(/dd/g, dayStr.substring(dayStr.length-2)); 
 
      //hour 
      var hourStr = ("0"+hour); 
      v = v.replace(/HH/g, hourStr.substring(hourStr.length-2)); 
      v = v.replace(/hh/g, hourStr.substring(hourStr.length-2)); 
 
      //minute 
      var minuteStr = ("0"+minute); 
      v = v.replace(/mm/g, minuteStr.substring(minuteStr.length-2)); 
 
      //Millisecond 
      v = v.replace(/sss/g, ms); 
      v = v.replace(/SSS/g, ms); 
       
      //second 
      var secondStr = ("0"+second); 
      v = v.replace(/ss/g, secondStr.substring(secondStr.length-2)); 
      v = v.replace(/SS/g, secondStr.substring(secondStr.length-2)); 
       
      //weekDay 
      v = v.replace(/E/g, weekDayString); 
      return v; 
    } 
 

// dateValue=2014-02-28 
var cDate = _STAGE.stringToDate(dateValue); 
cDate.setDate(cDate.getDate()+1); 
currentDate = jAnXin.util.formatDate(cDate, "yyyy-MM-dd"); 
 
console.log(currentDate ); // 2014-03-01

正则替换日期并格式化日期

转数字型：

ar ttDate = "2013年12月20日 14:20:20"; 
ttDate = ttDate.replace(/[^0-9]/mg, '').match(/.{8}/); 
alert(ttDate);

结果：

20131220

 转日期型：

var ttDate = "2013年12月20日 14:20:20";  
ttDate = ttDate.match(/\d{4}.\d{1,2}.\d{1,2}/mg).toString();  
ttDate = ttDate.replace(/[^0-9]/mg, '-');  
alert(ttDate);

结果：

2013-12-20

 超级正则替换：

var ttDate = "2013年12月20日 14:20:20";  

ttDate = ttDate.replace(/(\d{4}).(\d{1,2}).(\d{1,2}).+/mg, '$1-$2-$3'); 
alert(ttDate);

结果： 

2013-12-20

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