Angular6 项目开发常用时间组件服务
一、利用Angular 命令行工具生成一个服务。
详情见：《Angular环境搭建》，服务代码如下：
1 import { Injectable } from '@angular/core';
2
3 @Injectable({
4 providedIn: 'root'
5 })
6 export class TimeutilProvider {
7
8 private today: Date;
9 private year: String;
10 private mouth: String;
11 private date: String;
12 private hours: String;
13 private minutes: String;
14 private seconds: String;
15 private milliseconds: String;
16 private week:number;
17 private weekday:Array<string> =["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
18 constructor () {
19 this.today = new Date();
20 this.year = this.today.getFullYear().toString();
21 this.mouth = (this.today.getMonth() + 1).toString();
22 this.date = this.today.getDate().toString();
23 this.hours = this.today.getHours().toString();
24 this.minutes = this.today.getMinutes().toString();
25 this.seconds = this.today.getSeconds().toString();
26 this.milliseconds = this.today.getMilliseconds().toString();
27
28 this.week = this.today.getDay();
29
30 if (Number(this.mouth) < 10) {
31 this.mouth = '0' + this.mouth;
32 } else {
33 }
34 if (Number(this.date) < 10) {
35 this.date = '0' + this.date;
36 } else {
37 }
38 if (Number(this.hours) < 10) {
39 this.hours = '0' + this.hours;
40 } else {
41 }
42 if (Number(this.minutes) < 10) {
43 this.minutes = '0' + this.minutes;
44 } else {
45 }
46 if (Number(this.seconds) < 10) {
47 this.seconds = '0' + this.seconds;
48 }
49 if (10 > Number(this.milliseconds)) {
50 this.milliseconds = '00' + this.milliseconds;
51 } else if ((10 <= Number(this.milliseconds)) && (100 > Number(this.milliseconds))) {
52 this.milliseconds = '0' + this.milliseconds;
53 } else {
54 // dothing
55 }
56 }
57
58 //返回当前星期
59 currentWeek(){
60 return this.weekday[this.week].toString();
61 // this.week.toString();
62 }
63
64 //20190306115830234格式
65 currentTime() {
66 return this.year + '' + this.mouth + '' + this.date + '' + this.hours + '' + this.minutes + '' + this.seconds + '' + this.milliseconds;
67 }
68
69 //一般用于生成唯一标识，例如uuid
70 currentTime_id() {
71 // 三位随机数以免重复
72 const random = (Math.random() * 100000000000000000).toString().substr(0, 3);
73
74 return this.year + '' + this.mouth + '' + this.date + ''
75 + this.hours + '' + this.minutes + '' + this.seconds + '' + this.milliseconds + random;
76 }
77
78 //2019-03-06 11:59格式
79 currentTime_datestyle() {
80 return this.year + '-' + this.mouth + '-' + this.date + ' ' + this.hours + ':' + this.minutes + '';
81 }
82
83 //2019-03-06 11:59:30格式
84 currentTime_datesecondsstyle() {
85 return this.year + '-' + this.mouth + '-' + this.date + ' ' + this.hours + ':' + this.minutes + ':' + this.seconds;
86 }
87
88
89 // currentTime_date(){
90 // return this.year + '-' + this.mouth + '-' + this.date;
91 // }
92
93 // 返回当前时间"10:25:34"格式
94 currentTime_time(){
95 let now=new Date();
96 let year = (now.getFullYear()).toString();
97 let month = (now.getMonth()+1).toString();
98 let date = (now.getDate()).toString();
99 let hour = (now.getHours()).toString();
100 let minute= (now.getMinutes()).toString();
101 let second= (now.getSeconds()).toString();
102
103 if (Number(month) < 10) {
104 month = '0' + month;
105 } else {
106 }
107 if (Number(date) < 10) {
108 date = '0' + date;
109 } else {
110 }
111 if (Number(hour) < 10) {
112 hour = '0' + hour;
113 } else {
114 }
115 if (Number(minute) < 10) {
116 minute = '0' + minute;
117 } else {
118 }
119 if (Number(second) < 10) {
120 second = '0' + second;
121 }
122
123 return hour + ':' + minute + ':' + second;
124 }
125
126
127
128 //将当前时间转化为消息类型时间，2019.03.06 11:56:30格式
129 convertToDate_msgTimestamp(nows){
130 let now=new Date(nows);
131 let year = (now.getFullYear()).toString();
132 let month = (now.getMonth()+1).toString();
133 let date = (now.getDate()).toString();
134 let hour = (now.getHours()).toString();
135 let minute= (now.getMinutes()).toString();
136 let second= (now.getSeconds()).toString();
137
138 if (Number(month) < 10) {
139 month = '0' + month;
140 } else {
141 }
142 if (Number(date) < 10) {
143 date = '0' + date;
144 } else {
145 }
146 if (Number(hour) < 10) {
147 hour = '0' + hour;
148 } else {
149 }
150 if (Number(minute) < 10) {
151 minute = '0' + minute;
152 } else {
153 }
154 if (Number(second) < 10) {
155 second = '0' + second;
156 }
157 return year+"."+month+"."+date+" "+hour+":"+minute+":"+second;
158 }
159
160 //2019-03-06 11:56:30格式
161 convertToDate_timestamp(nows){
162 var now=new Date(nows);
163 var year = (now.getFullYear()).toString();
164 var month = (now.getMonth()+1).toString();
165 var date = (now.getDate()).toString();
166 var hour = (now.getHours()).toString();
167 var minute= (now.getMinutes()).toString();
168 var second= (now.getSeconds()).toString();
169
170 if (Number(month) < 10) {
171 month = '0' + month;
172 } else {
173 }
174 if (Number(date) < 10) {
175 date = '0' + date;
176 } else {
177 }
178 if (Number(hour) < 10) {
179 hour = '0' + hour;
180 } else {
181 }
182 if (Number(minute) < 10) {
183 minute = '0' + minute;
184 } else {
185 }
186 if (Number(second) < 10) {
187 second = '0' + second;
188 }
189 return year+"-"+month+"-"+date+" "+hour+":"+minute+":"+second;
190 }
191
192
193 //将消息时间格式转化为时间戳格式
194 convertTotimestamp(date:string){
195 return date.replace(".","-");
196 }
197
198
199 //将消息时间格式转化为Date类型
200 convertMsgtimeToDate(date:string){
201 //date = "2018.11.01 10:00:00";
202 date.replace(".","-");
203 return new Date(date)
204 }
205
206 //将时间戳格式日期转化为Date类型
207 convertTimestampToDate(date:string){
208 return new Date(date)
209 }
210
211 //获取当前时间前一天时间
212 getYestardayTime(){
213 return new Date(new Date().getTime() - 24*60*60*1000);
214 }
215
216 //返回当前日期“2018-02-03”格式
217 currentTime_daystyle() {
218 return this.year + "-" + this.mouth + "-" + this.date + " ";
219 }
220
221 //返回当前时间前一天时间“2018.02.03”格式
222 currentPreviousTime_daystyle() {
223 let previousDate = new Date(new Date().getTime() - 24*60*60*1000);
224 var year = (previousDate.getFullYear()).toString();
225 var month = (previousDate.getMonth()+1).toString();
226 var date = (previousDate.getDate()).toString();
227 if (Number(month) < 10) {
228 month = '0' + month;
229 } else {
230 }
231 if (Number(date) < 10) {
232 date = '0' + date;
233 } else {
234 }
235
236 return year + "." + month + "." + date + " ";
237 }
238 }二、时间服务的使用
1.在要是用的组建构造函数中依赖注入，如下图：
1 constructor(private timeutil : TimeutilProvider) {
2 //调用方法
3 console.log("id:",this.timeutil.currentTime_id(););
4 } 