链式调用建造者模式

src/main/java/top/fjy8018/designpattern/pattern/creational/builder/chain/BuCourse.java

@@ -0,0 +1,78 @@
+package top.fjy8018.designpattern.pattern.creational.builder.chain;
+
+/**
+ * 实体类
+ * 用静态内部类建造者，实现链式调用（推荐）
+ *
+ * @author F嘉阳
+ * @date 2018-09-25 17:13
+ */
+public class BuCourse {
+    private String courseName;
+    private String coursePPT;
+    private String courseVideo;
+    /**
+     * question & answer
+     */
+    private String courseQA;
+
+    /**
+     * 构造器接受静态内部类
+     *
+     * @param builder
+     */
+    public BuCourse(BuCourseBuilder builder) {
+        this.courseName = builder.courseName;
+        this.coursePPT = builder.coursePPT;
+        this.courseVideo = builder.courseVideo;
+        this.courseQA = builder.courseQA;
+
+    }
+
+    @Override
+    public String toString() {
+        return "BCourse{" +
+                "courseName='" + courseName + '\'' +
+                ", coursePPT='" + coursePPT + '\'' +
+                ", courseVideo='" + courseVideo + '\'' +
+                ", courseQA='" + courseQA + '\'' +
+                '}';
+    }
+
+    public static class BuCourseBuilder {
+        private String courseName;
+        private String coursePPT;
+        private String courseVideo;
+        private String courseQA;
+
+        public BuCourseBuilder courseName(String courseName) {
+            this.courseName = courseName;
+            return this;
+        }
+
+        public BuCourseBuilder coursePPT(String coursePPT) {
+            this.coursePPT = coursePPT;
+            return this;
+        }
+
+        public BuCourseBuilder courseVideo(String courseVideo) {
+            this.courseVideo = courseVideo;
+            return this;
+        }
+
+        public BuCourseBuilder courseQA(String courseQA) {
+            this.courseQA = courseQA;
+            return this;
+        }
+
+        /**
+         * 传递静态内部类返回目标对象
+         *
+         * @return
+         */
+        public BuCourse build() {
+            return new BuCourse(this);
+        }
+
+    }
+}

src/test/java/top/fjy8018/designpattern/pattern/creational/builder/CourseBuilderTest.java

@@ -2,6 +2,7 @@ package top.fjy8018.designpattern.pattern.creational.builder;
 
 import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
+import top.fjy8018.designpattern.pattern.creational.builder.chain.BuCourse;
 
 import static org.junit.jupiter.api.Assertions.*;
 
@@ -14,4 +15,15 @@ class CourseBuilderTest {
         BCourse course = coach.createCourse("Java课程", "课程PPT", "课程视频", "课程问答");
         log.info(course.toString());
     }
+
+    @Test
+    void chainBuild() {
+        BuCourse course = new BuCourse.BuCourseBuilder()
+                .courseName("Java课程")
+                .coursePPT("课程PPT")
+                .courseVideo("课程视频")
+                .courseQA("课程问答")
+                .build();
+        log.info(course.toString());
+    }
 }