时间日期格式转换及获取当前日期，获取前一周的日期

时间格式转换

const transFormation = {
    // 获取当前日期
    getLocalTime() {
        const date = new Date();
        const year = date.getFullYear();
        const month = date.getMonth() + 1;
        const day = date.getDate();
        const hour = date.getHours();
        const mins = date.getMinutes();
        const seconds = date.getSeconds();
        const time = `${year}-${transFormation.addZero(month)}-${transFormation.addZero(day)} ${transFormation.addZero(hour)}:${transFormation.addZero(mins)}:${transFormation.addZero(seconds)}`;
        return time;
    },
    // 获取一周前日期
    getWeekAgo() {
        const now = new Date();
        const date = new Date(now.getTime() - 7 * 24 * 3600 * 1000);
        const year = date.getFullYear();
        const month = date.getMonth() + 1;
        const day = date.getDate();
        const hour = date.getHours();
        const mins = date.getMinutes();
        const seconds = date.getSeconds();
        const time = `${year}-${transFormation.addZero(month)}-${transFormation.addZero(day)} ${transFormation.addZero(hour)}:${transFormation.addZero(mins)}:${transFormation.addZero(seconds)}`;
        return time;
    },
    // 获取当前时间前一天
    getPrevDate() {
        const now = new Date();
        const date = new Date(now - 1000 * 60 * 60 * 24);
        const year = date.getFullYear();
        const month = date.getMonth() + 1;
        const day = date.getDate();
        const hour = date.getHours();
        const mins = date.getMinutes();
        const seconds = date.getSeconds();
        const prevTime = `${year}-${transFormation.addZero(month)}-${transFormation.addZero(day)} ${transFormation.addZero(hour)}:${transFormation.addZero(mins)}:${transFormation.addZero(seconds)}`;
        return prevTime;
    },
    // 当前时间的前两个小时
    getPrevHour() {
        const now = new Date();
        const date = new Date(now - 2 * 60 * 60 * 1000);
        const year = date.getFullYear();
        const month = date.getMonth() + 1;
        const day = date.getDate();
        const hour = date.getHours();
        const mins = date.getMinutes();
        const seconds = date.getSeconds();
        const prevHour = `${year}-${transFormation.addZero(month)}-${transFormation.addZero(day)} ${transFormation.addZero(hour)}:${transFormation.addZero(mins)}:${transFormation.addZero(seconds)}`;
        return prevHour;
    },
    // 如果日期时间是单数前面添加0
    addZero(s) {
        return s < 10 ? `0${s}` : s;
    },
    // 标准时间转换成日期时间格式
    timestampToTime(timestamp) {
        const d = new Date(timestamp);
        const resDate = `${d.getFullYear()}-${transFormation.addZero((d.getMonth() + 1))}-${transFormation.addZero(d.getDate())}`;
        const resTime = `${transFormation.addZero(d.getHours())}:${transFormation.addZero(d.getMinutes())}:${transFormation.addZero(d.getSeconds())}`;
        const formDate = `${resDate} ${resTime}`;
        return formDate;
    },
    // 将图片url转成base64编码格式
    // getBase64Image(img) {
    //     const canvas = document.createElement('canvas'); // 创建一个canvas
    //     canvas.width = img.width; // 设置对应的宽高
    //     canvas.height = img.height;
    //     const ctx = canvas.getContext('2d'); // 二维绘图环境
    //     ctx.drawImage(img, 0, 0, img.width, img.height); // 将图片画在画布上
    //     const ext = img.src.substring(img.src.lastIndexOf('.') + 1).toLowerCase(); // 获取到图片的格式
    //     const dataURL = canvas.toDataURL(`image/${ext}`); // 得到base64 编码的 dataURL
    //     return dataURL;
    // },
};
export default transFormation;