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+import { Injectable } from '@angular/core';
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+
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+/**
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+ * 工具类：存放和业务无关的公共方法
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+ */
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+@Injectable({
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+ providedIn: 'root'
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+})
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+export class Utils {
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+
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+ /**
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+ * 日期对象转为日期字符串
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+ * @param date 需要格式化的日期对象
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+ * @param sFormat 输出格式,默认为yyyy-MM-dd 年：y，月：M，日：d，时：h，分：m，秒：s
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+ * @example dateFormat(new Date()) "2017-02-28"
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+ * @example dateFormat(new Date(),'yyyy-MM-dd') "2017-02-28"
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+ * @example dateFormat(new Date(),'yyyy-MM-dd HH:mm:ss') "2017-02-28 13:24:00" ps:HH:24小时制
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+ * @example dateFormat(new Date(),'yyyy-MM-dd hh:mm:ss') "2017-02-28 01:24:00" ps:hh:12小时制
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+ * @example dateFormat(new Date(),'hh:mm') "09:24"
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+ * @example dateFormat(new Date(),'yyyy-MM-ddTHH:mm:ss+08:00') "2017-02-28T13:24:00+08:00"
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+ * @example dateFormat(new Date('2017-02-28 13:24:00'),'yyyy-MM-ddTHH:mm:ss+08:00') "2017-02-28T13:24:00+08:00"
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+ */
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+ static dateFormat(date: Date, sFormat: String = 'yyyy-MM-dd'): string {
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+ const time = {
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+ Year: 0,
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+ TYear: '0',
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+ Month: 0,
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+ TMonth: '0',
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+ Day: 0,
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+ TDay: '0',
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+ Hour: 0,
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+ THour: '0',
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+ hour: 0,
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+ Thour: '0',
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+ Minute: 0,
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+ TMinute: '0',
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+ Second: 0,
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+ TSecond: '0',
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+ Millisecond: 0
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+ };
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+ time.Year = date.getFullYear();
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+ time.TYear = String(time.Year).substr(2);
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+ time.Month = date.getMonth() + 1;
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+ time.TMonth = time.Month < 10 ? '0' + time.Month : String(time.Month);
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+ time.Day = date.getDate();
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+ time.TDay = time.Day < 10 ? '0' + time.Day : String(time.Day);
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+ time.Hour = date.getHours();
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+ time.THour = time.Hour < 10 ? '0' + time.Hour : String(time.Hour);
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+ time.hour = time.Hour < 13 ? time.Hour : time.Hour - 12;
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+ time.Thour = time.hour < 10 ? '0' + time.hour : String(time.hour);
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+ time.Minute = date.getMinutes();
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+ time.TMinute = time.Minute < 10 ? '0' + time.Minute : String(time.Minute);
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+ time.Second = date.getSeconds();
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+ time.TSecond = time.Second < 10 ? '0' + time.Second : String(time.Second);
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+ time.Millisecond = date.getMilliseconds();
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+
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+ return sFormat.replace(/yyyy/ig, String(time.Year))
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+ .replace(/yyy/ig, String(time.Year))
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+ .replace(/yy/ig, time.TYear)
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+ .replace(/y/ig, time.TYear)
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+ .replace(/MM/g, time.TMonth)
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+ .replace(/M/g, String(time.Month))
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+ .replace(/dd/ig, time.TDay)
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+ .replace(/d/ig, String(time.Day))
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+ .replace(/HH/g, time.THour)
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+ .replace(/H/g, String(time.Hour))
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+ .replace(/hh/g, time.Thour)
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+ .replace(/h/g, String(time.hour))
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+ .replace(/mm/g, time.TMinute)
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+ .replace(/m/g, String(time.Minute))
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+ .replace(/ss/ig, time.TSecond)
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+ .replace(/s/ig, String(time.Second))
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+ .replace(/fff/ig, String(time.Millisecond));
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+ }
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+
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+ /**
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+ * 返回字符串长度，中文计数为2
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+ */
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+ static strLength(str: string): number {
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+ let len = 0;
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+ for (let i = 0, length = str.length; i < length; i++) {
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+ str.charCodeAt(i) > 255 ? len += 2 : len++;
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+ }
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+ return len;
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+ }
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+
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+ /**
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+ * 密码强度 返回：low middle high
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+ */
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+ static checkPass(pwd) {
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+ let m = 0;
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+ if (pwd.length <= 6) {
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+ return 'low'; // 密码长度小于等于6
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+ }
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+ if (/\d/.test(pwd)) {
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+ m++; // 纯数字密码
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+ }
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+ if (/[a-z]/.test(pwd)) {
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+ m++; // 密码包含小写字母
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+ }
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+ if (/[A-Z]/.test(pwd)) {
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+ m++; // 密码包含大写字母
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+ }
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+ if (/\W/.test(pwd)) {
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+ m++; // 密码包含特殊字符
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+ }
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+ if (pwd.length > 15) {
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+ m = 4; // 密码长度大于15
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+ }
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+ if (m < 2) {
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+ return 'low';
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+ }
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+ if (m === 2) {
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+ return 'middle';
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+ }
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+ if (m >= 3) {
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+ return 'high';
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+ }
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+ }
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+
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+ /**
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+ * 把url中的双斜杠替换为单斜杠
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+ * 如:http://localhost:8080//api//demo.替换后http://localhost:8080/api/demo
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+ */
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+ static formatUrl(url = ''): string {
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+ let index = 0;
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+ if (url.startsWith('http')) {
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+ index = 7;
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+ }
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+ return url.substring(0, index) + url.substring(index).replace(/\/\/*/g, '/');
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+ }
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+
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+ /**
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+ * 产生一个随机的32位长度字符串
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+ */
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+ static uuid() {
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+ let text = '';
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+ const possible = 'abcdef0123456789';
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+ for (let i = 0; i < 19; i++) {
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+ text += possible.charAt(Math.floor(Math.random() * possible.length));
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+ }
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+ return text + new Date().getTime();
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+ }
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+
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+ /**
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+ * 根据图片路径把图片转为base64字符串格式
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+ */
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+ static convertImgToBase64(url: string, callback: Function, width: number = null, height: number = null, outputFormat = 'image/jpg') {
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+ const img = new Image();
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+ img.crossOrigin = 'anonymous';
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+ img.onload = function () {
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+ const canvas = <HTMLCanvasElement>document.createElement('canvas');
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+ canvas.width = width || img.width;
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+ canvas.height = height || img.height;
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+ const context = canvas.getContext('2d');
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+ context.drawImage(img, 0, 0, canvas.width, canvas.height);
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+ const imgBase64 = canvas.toDataURL(outputFormat);
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+ if (callback) {
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+ callback(imgBase64);
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+ }
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+ };
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+ img.src = url;
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+ }
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+
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+}
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liyayan