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// 数字格式化函数
export function formatNumber(num) {
if (num === null || num === undefined) return '0'
const absNum = Math.abs(num)
if (absNum >= 1e9) {
return (num / 1e9).toFixed(2) + 'B'
} else if (absNum >= 1e6) {
return (num / 1e6).toFixed(2) + 'M'
} else if (absNum >= 1e3) {
return (num / 1e3).toFixed(1) + 'K'
}
return num.toLocaleString()
}
// 日期格式化函数
export function formatDate(date, format = 'YYYY-MM-DD HH:mm:ss') {
if (!date) return ''
const d = new Date(date)
const year = d.getFullYear()
const month = String(d.getMonth() + 1).padStart(2, '0')
const day = String(d.getDate()).padStart(2, '0')
const hours = String(d.getHours()).padStart(2, '0')
const minutes = String(d.getMinutes()).padStart(2, '0')
const seconds = String(d.getSeconds()).padStart(2, '0')
return format
.replace('YYYY', year)
.replace('MM', month)
.replace('DD', day)
.replace('HH', hours)
.replace('mm', minutes)
.replace('ss', seconds)
}
// 相对时间格式化
export function formatRelativeTime(date) {
if (!date) return ''
const now = new Date()
const past = new Date(date)
const diffMs = now - past
const diffSecs = Math.floor(diffMs / 1000)
const diffMins = Math.floor(diffSecs / 60)
const diffHours = Math.floor(diffMins / 60)
const diffDays = Math.floor(diffHours / 24)
if (diffDays > 0) {
return `${diffDays}天前`
} else if (diffHours > 0) {
return `${diffHours}小时前`
} else if (diffMins > 0) {
return `${diffMins}分钟前`
} else {
return '刚刚'
}
}
// 字节格式化
export function formatBytes(bytes, decimals = 2) {
if (bytes === 0) return '0 Bytes'
const k = 1024
const dm = decimals < 0 ? 0 : decimals
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
const i = Math.floor(Math.log(bytes) / Math.log(k))
return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
}
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