Merge pull request #95 from GuoXiCheng/dev-c

update docs

src/design-pattern/behavioral/template-method.md

@@ -0,0 +1,55 @@
+# 模板方法模式
+
+
+::: playground#ts 模板方法模式交互演示
+
+@file index.ts
+
+```ts
+abstract class AbstractClass {
+    // 这是模板方法
+    templateMethod(): void {
+        this.getData();
+        this.processData();
+        this.saveData();
+    }
+
+    protected abstract getData(): void;
+
+    protected abstract processData(): void;
+
+    protected abstract saveData(): void;
+}
+
+class HtmlReport extends AbstractClass {
+    protected getData(): void {
+        console.log("get html data");
+    }
+    protected processData(): void {
+        console.log("process html data");
+    }
+    protected saveData(): void {
+        console.log("save html data");
+    }
+}
+
+class PdfReport extends AbstractClass {
+    protected getData(): void {
+        console.log("get pdf data");
+    }
+    protected processData(): void {
+        console.log("process pdf data");
+    }
+    protected saveData(): void {
+        console.log("save pdf data");
+    }
+}
+
+const htmlReport = new HtmlReport();
+htmlReport.templateMethod();
+
+const pdfReport = new PdfReport();
+pdfReport.templateMethod();
+```
+
+:::