C04 建造者示例（一）-优快云博客

本文深入解析建造者模式在课程创建中的应用，通过具体代码示例展示如何使用该模式来简化复杂对象的创建过程，提高代码的灵活性和复用性。

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类图

建造者模式.png

代码

被建造者

public class Course {

    private String courseName;
    private String courseVideo;
    private String courseArticle;
    private String coursePPT;
    private String courseQA;

    public String getCourseName() {
        return courseName;
    }

    public void setCourseName(String courseName) {
        this.courseName = courseName;
    }

    public String getCourseVideo() {
        return courseVideo;
    }

    public void setCourseVideo(String courseVideo) {
        this.courseVideo = courseVideo;
    }

    public String getCourseArticle() {
        return courseArticle;
    }

    public void setCourseArticle(String courseArticle) {
        this.courseArticle = courseArticle;
    }

    public String getCoursePPT() {
        return coursePPT;
    }

    public void setCoursePPT(String coursePPT) {
        this.coursePPT = coursePPT;
    }

    public String getCourseQA() {
        return courseQA;
    }

    public void setCourseQA(String courseQA) {
        this.courseQA = courseQA;
    }

    @Override
    public String toString() {
        return "Course{" +
                "courseName='" + courseName + '\'' +
                ", courseVideo='" + courseVideo + '\'' +
                ", courseArticle='" + courseArticle + '\'' +
                ", coursePPT='" + coursePPT + '\'' +
                ", courseQA='" + courseQA + '\'' +
                '}';
    }

}

抽象建造者

public abstract class CourseBuilder {

    public abstract void buildCourseName(String courseName);
    public abstract void buildCourseVideo(String courseVideo);
    public abstract void buildCourseArticle(String courseArticle);
    public abstract void buildCoursePPT(String coursePPT);
    public abstract void buildCourseQA(String CourseQA);

    public abstract Course makeCourse();

}

具体建造者

public class CourseActualBuilder extends CourseBuilder{

    private Course course = new Course();

    @Override
    public void buildCourseName(String courseName) {
        course.setCourseName(courseName);
    }

    @Override
    public void buildCourseVideo(String courseVideo) {
        course.setCourseVideo(courseVideo);
    }

    @Override
    public void buildCourseArticle(String courseArticle) {
        course.setCourseArticle(courseArticle);
    }

    @Override
    public void buildCoursePPT(String coursePPT) {
        course.setCoursePPT(coursePPT);
    }

    @Override
    public void buildCourseQA(String CourseQA) {
        course.setCourseQA(CourseQA);
    }

    @Override
    public Course makeCourse() {
        return course;
    }

}

建造者代理

public class Coach {

    private CourseBuilder courseBuilder;

    public void setCourseBuilder(CourseBuilder courseBuilder) {
        this.courseBuilder = courseBuilder;
    }

    public Course makeCourse(String courseName,
                             String courseVideo,
                             String courseArticle,
                             String coursePPT,
                             String courseQA) {
        courseBuilder.buildCourseArticle(courseArticle);
        courseBuilder.buildCourseName(courseName);
        courseBuilder.buildCourseVideo(courseVideo);
        courseBuilder.buildCoursePPT(coursePPT);
        courseBuilder.buildCourseQA(courseQA);
        return courseBuilder.makeCourse();
    }

}

客户端

public class Test {

    public static void main(String[] args) {
        Coach coach = new Coach();
        CourseBuilder courseBuilder = new CourseActualBuilder();
        coach.setCourseBuilder(courseBuilder);

        Course course = coach.makeCourse("Java设计模式名称",
                "Java设计模式视频",
                "Java设计模式手记",
                "Java设计模式PPT",
                "Java设计模式问答");
        System.out.println(course);
    }

}

输出：