<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title></title> <script type="text/javascript" src="js/jquery-1.8.2.js" ></script> </head> <body> <a id="test2" href="javascript: void(0);">前一天</a> 测试日期:<span id="test1">20200301</span> <a id="test3" href="javascript: void(0);">后一天</a> <script type="text/javascript"> function getDateArr(year){ var yearFlag = false; var januaryQty = 31; var dateArr = []; dateArr.push(januaryQty); var februaryQty = 28; if((year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)){ februaryQty = 29; } dateArr.push(februaryQty); var marchQty = 31; var aprilQty = 30; var mayQty = 31; var juneQty = 30; var julyQty = 31; var augustQty = 31; var septemberQty = 30; var octoberQty = 31; var novemberQty = 30; var decemberQty = 31; dateArr.push(marchQty); dateArr.push(aprilQty); dateArr.push(mayQty); dateArr.push(juneQty); dateArr.push(julyQty); dateArr.push(augustQty); dateArr.push(septemberQty); dateArr.push(octoberQty); dateArr.push(novemberQty); dateArr.push(decemberQty); return dateArr; } $("#test2").on("click", function(){ var currentDateStr = $("#test1").text(); var currentYearStr = currentDateStr.substring(0, 4); var dateArr = getDateArr(currentYearStr); var currentMonthStr = currentDateStr.substring(4, 6); var currentDayStr = currentDateStr.substring(6); var currentMonthDayQty = dateArr[currentMonthStr - 1]; var priviousMonthDayIndex = currentMonthStr - 2; if(priviousMonthDayIndex == -1){ priviousMonthDayIndex = dateArr.length - 1; } if(priviousMonthDayIndex == 12){ priviousMonthDayIndex = 0; } var priviousMonthDayQty = dateArr[priviousMonthDayIndex]; var previousYear = parseInt(currentYearStr); var previousMonth = parseInt(currentMonthStr); var previousDay = parseInt(currentDayStr) - 1; var previousYearStr = previousYear + ""; var previousMonthStr = previousMonth + ""; var previousDayStr = previousDay + ""; if(previousDayStr < 1){ previousDayStr = priviousMonthDayQty; previousMonthStr = parseInt(previousMonthStr) - 1; } if(previousMonthStr == 0){ previousYearStr = parseInt(previousYearStr) - 1; previousMonthStr = 12; } if(previousMonthStr < 10){ previousMonthStr = "0" + previousMonthStr; } if(previousDayStr < 10){ previousDayStr = "0" + previousDayStr; } var previousDateStr = previousYearStr.toString() + previousMonthStr.toString() + previousDayStr.toString(); $("#test1").text(previousDateStr); }); $("#test3").on("click", function(){ var currentDateStr = $("#test1").text(); var currentYearStr = currentDateStr.substring(0, 4); var dateArr = getDateArr(currentYearStr); var currentMonthStr = currentDateStr.substring(4, 6); var currentDayStr = currentDateStr.substring(6); var currentMonthDayQty = dateArr[currentMonthStr - 1]; var nextMonthDayIndex = currentMonthStr; var nextYear = parseInt(currentYearStr); var nextMonth = parseInt(currentMonthStr); var nextDay = parseInt(currentDayStr) + 1; if(nextDay > currentMonthDayQty){ nextDay = 1; nextMonth = parseInt(nextMonth) + 1; } if(nextMonth == 13){ nextYear = parseInt(nextYear) + 1; nextMonth = 1; } var nextYearStr = nextYear + ""; var nextMonthStr = nextMonth + ""; if(nextMonthStr < 10){ nextMonthStr = "0" + nextMonthStr; } var nextDayStr = nextDay + ""; if(nextDayStr < 10){ nextDayStr = "0" + nextDayStr; } var nextDateStr = nextYearStr.toString() + nextMonthStr.toString() + nextDayStr.toString(); $("#test1").text(nextDateStr); }); </script> </body> </html>
已完成.