From bd76223a9e1f252ce218dbb26090d93088a932d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?F=E5=98=89=E9=98=B3?= <fjy8018@qq.com>
Date: Wed, 4 Mar 2020 11:32:46 +0800
Subject: [PATCH] =?UTF-8?q?=E6=A8=A1=E6=9D=BF=E6=96=B9=E6=B3=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../behavior/templatemethod/ACourse.java      | 64 +++++++++++++++++++
 .../behavior/templatemethod/JavaCourse.java   | 21 ++++++
 .../behavior/templatemethod/VueCourse.java    | 44 +++++++++++++
 .../behavior/templatemethod/ACourseTest.java  | 24 +++++++
 4 files changed, 153 insertions(+)
 create mode 100644 src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourse.java
 create mode 100644 src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/JavaCourse.java
 create mode 100644 src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/VueCourse.java
 create mode 100644 src/test/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourseTest.java

diff --git a/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourse.java b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourse.java
new file mode 100644
index 0000000..8f991bc
--- /dev/null
+++ b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourse.java
@@ -0,0 +1,64 @@
+package top.fjy8018.designpattern.pattern.behavior.templatemethod;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 抽象课程
+ *
+ * @author F嘉阳
+ * @date 2020/3/4 10:59
+ */
+@Slf4j
+public abstract class ACourse {
+
+    /**
+     * 固定不变的行为
+     * 定义模板，不允许子类覆盖，防止影响流程执行顺序
+     */
+    protected final void makeCourse() {
+        this.makePPT();
+        this.makeVideo();
+        // 调用可选方法
+        if (needWriteArticle()) {
+            this.writeArticle();
+        }
+        this.packageCourse();
+    }
+
+    /**
+     * 固定不变的行为
+     * 满足所有子类需求
+     */
+    final void makePPT() {
+        log.info("制作PPT");
+    }
+
+    final void makeVideo() {
+        log.info("制作视频");
+    }
+
+    /**
+     * 可选行为
+     * <p>
+     * 手记可写可不写，但写的手记的流程还是一致的，故也声明为final
+     * 通过定义钩子方法，允许子类覆盖
+     */
+    final void writeArticle() {
+        log.info("编写手记");
+    }
+
+    /**
+     * 钩子方法，提供默认实现
+     *
+     * @return
+     */
+    protected boolean needWriteArticle() {
+        return false;
+    }
+
+    /**
+     * 必须实现的行为
+     * 课程内容打包
+     */
+    abstract void packageCourse();
+}
diff --git a/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/JavaCourse.java b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/JavaCourse.java
new file mode 100644
index 0000000..c7c2b9b
--- /dev/null
+++ b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/JavaCourse.java
@@ -0,0 +1,21 @@
+package top.fjy8018.designpattern.pattern.behavior.templatemethod;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 具体课程实现
+ *
+ * @author F嘉阳
+ * @date 2020/3/4 11:05
+ */
+@Slf4j
+public class JavaCourse extends ACourse {
+    /**
+     * 必须实现的行为
+     * 课程内容打包
+     */
+    @Override
+    void packageCourse() {
+        log.info("提供Java学习课程源码");
+    }
+}
diff --git a/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/VueCourse.java b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/VueCourse.java
new file mode 100644
index 0000000..aa8d122
--- /dev/null
+++ b/src/main/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/VueCourse.java
@@ -0,0 +1,44 @@
+package top.fjy8018.designpattern.pattern.behavior.templatemethod;
+
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 具体课程实现
+ *
+ * @author F嘉阳
+ * @date 2020/3/4 11:06
+ */
+@Slf4j
+public class VueCourse extends ACourse {
+
+    private boolean needWriteArticleFlag = false;
+
+    /**
+     * 通过构造器开放给实例决定
+     *
+     * @param needWriteArticleFlag
+     */
+    public VueCourse(boolean needWriteArticleFlag) {
+        this.needWriteArticleFlag = needWriteArticleFlag;
+    }
+
+    /**
+     * 必须实现的行为
+     * 课程内容打包
+     */
+    @Override
+    void packageCourse() {
+        log.info("提供Vue学习课程源码");
+        log.info("提供Vue学习课程多媒体素材");
+    }
+
+    /**
+     * 钩子方法，提供默认实现
+     *
+     * @return
+     */
+    @Override
+    protected boolean needWriteArticle() {
+        return this.needWriteArticleFlag;
+    }
+}
diff --git a/src/test/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourseTest.java b/src/test/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourseTest.java
new file mode 100644
index 0000000..7a3c53d
--- /dev/null
+++ b/src/test/java/top/fjy8018/designpattern/pattern/behavior/templatemethod/ACourseTest.java
@@ -0,0 +1,24 @@
+package top.fjy8018.designpattern.pattern.behavior.templatemethod;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author F嘉阳
+ * @date 2020/3/4 11:08
+ */
+@Slf4j
+class ACourseTest {
+
+    @Test
+    void makeJavaCourse() {
+        ACourse javaCourse = new JavaCourse();
+        javaCourse.makeCourse();
+    }
+
+    @Test
+    void makeVueCourse() {
+        ACourse vueCourse = new VueCourse(true);
+        vueCourse.makeCourse();
+    }
+}
\ No newline at end of file