一句话搞定日期减一年
new Date(new Date()-365*24*60*60*1000).getFullYear()+'-'+(new Date(new Date()-365*24*60*60*1000).getMonth()+1<10?'0'+(new Date(new Date()-365*24*60*60*1000).getMonth()+1):(new Date(new Date()-365*24*60*60*1000).getMonth()+1))+'-'+(new Date(new Date()-365*24*60*60*1000).getDate()<10?'0'+new Date(new Date()-365*24*60*60*1000).getDate():new Date(new Date()-365*24*60*60*1000).getDate())
详细逻辑如下:
localdate = new Date(); //Sat Jul 20 2013 10:43:36 GMT+0800 (中国标准时间)
lastyear= new Date(localdate -365*24*60*60*1000); //Fri Jul 20 2012 10:43:36 GMT+0800 (中国标准时间) 减一个月只需要把365改为30即可
year=lastyear.getFullYear(); //2012
month = lastyear.getMonth()+1; //7
month = month<10?'0'+month:month; //"07"
day = lastyear.getDate();//20
day = day<10?'0'+day:day;//"20"
LastYear = year+'-'+month+'-'+day; //"2012-07-20"