几个常用的函数

src/comm/utils.ts

@@ -2,6 +2,7 @@ import { Inject, Provide } from '@midwayjs/decorator';
 import { Context } from '@midwayjs/koa';
 import * as ipdb from 'ipip-ipdb';
 import * as _ from 'lodash';
+import * as moment from 'moment';
 
 /**
  * 帮助类
@@ -64,4 +65,97 @@ export class Utils {
   sleep(ms) {
     return new Promise(resolve => setTimeout(resolve, ms));
   }
+
+  /**
+   * 获得最近几天的日期集合
+   * @param recently
+   */
+  getRecentlyDates(recently, format = 'YYYY-MM-DD') {
+    moment.locale('zh-cn');
+    const dates = [];
+    for (let i = 0; i < recently; i++) {
+      dates.push(moment().subtract(i, 'days').format(format));
+    }
+    return dates.reverse();
+  }
+  /**
+   * 获得最近几个月的月数
+   * @param recently
+   */
+  getRecentlyMonths(recently, format = 'YYYY-MM') {
+    moment.locale('zh-cn');
+    const dates = [];
+    const date = moment(Date.now()).format('YYYY-MM');
+    for (let i = 0; i < recently; i++) {
+      dates.push(moment(date).subtract(i, 'months').format(format));
+    }
+    return dates.reverse();
+  }
+
+  /**
+   * 根据开始和结束时间，获得时间段内的日期集合
+   * @param start
+   * @param end
+   */
+  getBetweenDays(start, end, format = 'YYYY-MM-DD') {
+    moment.locale('zh-cn');
+    const dates = [];
+    const startTime = moment(start).format(format);
+    const endTime = moment(end).format(format);
+    const days = moment(endTime).diff(moment(startTime), 'days');
+    for (let i = 0; i <= days; i++) {
+      dates.push(moment(startTime).add(i, 'days').format(format));
+    }
+    return dates;
+  }
+
+  /**
+   * 根据开始和结束时间，获得时间段内的月份集合
+   * @param start
+   * @param end
+   */
+  getBetweenMonths(start, end, format = 'YYYY-MM') {
+    moment.locale('zh-cn');
+    const dates = [];
+    const startTime = moment(start).format(format);
+    const endTime = moment(end).format(format);
+    const months = moment(endTime).diff(moment(startTime), 'months');
+    for (let i = 0; i <= months; i++) {
+      dates.push(moment(startTime).add(i, 'months').format(format));
+    }
+    return dates;
+  }
+
+  /**
+   * 根据开始和结束时间，获得时间段内的小时集合
+   * @param start
+   * @param end
+   */
+  getBetweenHours(start, end, format = 'YYYY-MM-DD HH') {
+    moment.locale('zh-cn');
+    const dates = [];
+    const startTime = moment(start).format(format);
+    const endTime = moment(end).format(format);
+    const hours = moment(endTime).diff(moment(startTime), 'hours');
+    for (let i = 0; i <= hours; i++) {
+      dates.push(moment(startTime).add(i, 'hours').format(format));
+    }
+    return dates;
+  }
+
+  /**
+   * 字段转驼峰法
+   * @param obj
+   * @returns
+   */
+  toCamelCase(obj) {
+    let camelCaseObject = {};
+    for (let i in obj) {
+      let camelCase = i.replace(/([-_][a-z])/gi, $1 => {
+        return $1.toUpperCase().replace('-', '').replace('_', '');
+      });
+      camelCaseObject[camelCase] = obj[i];
+    }
+    return camelCaseObject;
+  }
 }