从"Blog"仓库中分离出来

index/src/app/services/count/count.service.ts

@@ -0,0 +1,24 @@
+import {Injectable} from '@angular/core';
+import {HttpService} from '../http.service';
+import {Count} from '../../class/count';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CountService {
+
+  constructor(public http: HttpService) {
+  }
+
+  count: Count;
+
+  getCount() {
+    const observable = this.http.get('/counts');
+    observable.subscribe((data: any) => {
+      if (data.code === 0) {
+        this.count = data.result;
+      }
+    });
+    return observable;
+  }
+}