修改路径

src/app/view/category/category-routing.module.ts

@@ -0,0 +1,18 @@
+import {NgModule} from '@angular/core';
+import {RouterModule, Routes} from '@angular/router';
+import {CategoryComponent} from './category.component';
+
+const routes: Routes = [
+    {path: ':category', component: CategoryComponent},
+    {path: '**', component: CategoryComponent}
+];
+
+@NgModule({
+    imports: [
+        RouterModule.forChild(routes)
+    ],
+    exports: [RouterModule]
+})
+
+export class CategoryRoutingModule {
+}

src/app/view/category/category.component.html

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+<div id="main">
+
+
+    <div id="category">
+        <ul *ngIf="categoryList.length">
+            <c-tag-tag *ngFor="let category of categoryList"
+                       [tag]="{name:category.name,size:category.articles.length}"
+                       (tagClick)="changeCategory(category)">
+
+            </c-tag-tag>
+        </ul>
+        <h2 *ngIf="!categoryList.length">暂时没有分类</h2>
+    </div>
+
+    <span id="tip">当前分类为 :
+        <span style="font-weight: bolder;">{{name}}</span>
+    </span>
+
+    <ul id="detail" *ngIf="articleList&&articleList.list.length">
+        <c-article-detail-card *ngFor="let article of articleList.list"
+                               [data]="article" [showMediaArea]="false" [showTagArea]="false">
+        </c-article-detail-card>
+    </ul>
+
+    <div *ngIf="!articleList||!articleList.list.length">
+        <h2 style="text-align: center">该分类暂无文章</h2>
+    </div>
+</div>

src/app/view/category/category.component.less

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+#main {
+  width: 75%;
+  margin: 30px auto;
+  border-radius: 10px;
+  padding: 10px;
+  background: #ffffff;
+
+  #tip {
+    margin-left: 40px;
+    font-size: large;
+  }
+
+  #category {
+    text-align: center;
+  }
+
+  #detail {
+    margin-top: 20px;
+  }
+}
+
+@media screen and (max-width: 940px) {
+  #main {
+    width: 100%;
+  }
+  #detail{
+    margin: 10px 40px 10px 0;
+  }
+}

src/app/view/category/category.component.spec.ts

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+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { CategoryComponent } from './category.component';
+
+describe('CategoryComponent', () => {
+  let component: CategoryComponent;
+  let fixture: ComponentFixture<CategoryComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ CategoryComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(CategoryComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/view/category/category.component.ts

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+import {Component, OnInit} from '@angular/core';
+import {ApiService} from '../../api/api.service';
+import {Tag} from '../../class/Tag';
+import {NzMessageService} from 'ng-zorro-antd';
+import {PageList} from '../../class/HttpReqAndResp';
+import {Article} from '../../class/Article';
+import {ActivatedRoute} from '@angular/router';
+import {Location} from '@angular/common';
+import {Title} from '@angular/platform-browser';
+
+@Component({
+    selector: 'view-category',
+    templateUrl: './category.component.html',
+    styleUrls: ['./category.component.less']
+})
+export class CategoryComponent implements OnInit {
+
+    constructor(private apiService: ApiService,
+                private nzMessageService: NzMessageService,
+                private activatedRoute: ActivatedRoute,
+                private location: Location,
+                private title: Title) {
+    }
+
+    categoryList: Tag[] = [];
+    private category: Tag;
+    articleList: PageList<Article>;
+
+    name: string;
+
+    ngOnInit() {
+        this.name = this.activatedRoute.snapshot.paramMap.get('category');
+        this.getCategories(this.name == null);
+        if (this.name != null) {
+            this.getArticles(this.name);
+        }
+    }
+
+    getCategories(needGetArticle: boolean) {
+        this.apiService.categories().subscribe(data => {
+            this.categoryList = data.result;
+            this.category = data.result[0];
+            if (needGetArticle) {
+                this.getArticles(this.category.name);
+                this.name = this.category.name;
+                this.title.setTitle('小海博客 | 分类 | ' + this.name);
+            }
+        }, error => {
+            this.nzMessageService.error('出现了错误，原因：' + error.msg);
+        });
+    }
+
+    getArticles(categoryName: string) {
+        this.apiService.articlesByCategory(categoryName).subscribe(data => {
+            this.articleList = data.result;
+        }, error => {
+            this.nzMessageService.error('出现了错误，原因：' + error.msg);
+        });
+    }
+
+    changeCategory(category: Tag) {
+        if (this.name === category.name) {
+            return;
+        }
+        this.category = category;
+        this.name = category.name;
+        this.location.replaceState('categories/' + this.name);
+        this.getArticles(this.name);
+        this.title.setTitle('小海博客 | 分类 | ' + this.name);
+    }
+}

src/app/view/category/category.module.ts

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+import {NgModule} from '@angular/core';
+import {CommonModule} from '@angular/common';
+import {CategoryComponent} from './category.component';
+import {CategoryRoutingModule} from './category-routing.module';
+import {NzIconModule, NzToolTipModule} from 'ng-zorro-antd';
+import {IndexModule} from '../index/index.module';
+
+
+@NgModule({
+    declarations: [CategoryComponent],
+    imports: [
+        CommonModule,
+        CategoryRoutingModule,
+        NzToolTipModule,
+        NzIconModule,
+        IndexModule
+    ]
+})
+export class CategoryModule {
+}