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getTime() { let arr = [] let date = new Date() let fistDay = new Date(date.getFullYear(), date.getMonth(), 1) // 當月第一天 let lastDay = new Date ...

Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, 2019); cal.set(Calendar.MONTH, 11); ...

java獲取當前月第一天和最后一天，上個月第一天和最后一天 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd"); //獲取前月的第一天 Calendar ...

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SimpleDateFormat format = new SimpleDateFormat( "yyyy-MM-dd" ); //獲取前月的第一天 Calendar cal_1 ...

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