angular study file add

Author: dvmoomoodv

angular/angular-quick-start3/src/app/a/a.component.ts

@@ -1,5 +1,5 @@
 import { OneService } from './../one.service';
-import { Component, OnInit } from '@angular/core';
+import { Component, OnInit, Inject } from '@angular/core';
 
 @Component({
   selector: 'app-a',
@@ -8,8 +8,9 @@ import { Component, OnInit } from '@angular/core';
 })
 export class AComponent implements OnInit {
 
-  constructor(private one: OneService) {
+  constructor(private one: OneService, @Inject('apiUrl') private apiUrl: string) {
     console.log(one.name);
+    console.log(apiUrl);
   }
 
   ngOnInit() {

angular/angular-quick-start3/src/app/app.module.ts

@@ -18,7 +18,14 @@ import { BComponent } from './b/b.component';
     BrowserModule
   ],
   providers: [
-    OneService
+    {
+      provide: 'one',
+      useClass: OneService
+    },
+    {
+      provide : 'apiUrl',
+      useValue : 'test'
+    }
   ],
   bootstrap: [AppComponent]
 })