设计模式-原型模式

设计模式-原型模式

原型模式其实就是从一个对象再创建另外一个可定制的对象，而且不需要知道任何创建的细节

在类中需要实现Cloneable接口，重写clone方法即可。需要注意的是深拷贝和浅拷贝问题。

浅拷贝是指实体类中对象属性，在进行拷贝的时候不会复制对象属性的属性，而是直接复制地址。因此解决办法是在对象属性中再重写clone方法

没有代码构成图，直接上代码吧!

/**
 * 简历类
 */
public class Resume implements Cloneable{
    /** 姓名 */
    private String name;
    /** 岗位 */
    private String post;
    /** 工作经历 */
    private WorkExperience workExperience;

    /**
     * 重写clone方法
     */
    @Override
    public Resume clone(){
        Resume resume = null;
        try {
            resume = (Resume) super.clone();
            resume.workExperience = this.workExperience.clone();
        }catch (CloneNotSupportedException e){
            System.out.println("克隆失败");
        }
        return resume;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPost() {
        return post;
    }

    public void setPost(String post) {
        this.post = post;
    }

    public WorkExperience getWorkExperience() {
        return workExperience;
    }

    public void setWorkExperience(String time, String company) {
        this.workExperience = new WorkExperience();
        this.workExperience.setTimeArea(time);
        this.workExperience.setCompany(company);
    }

    @Override
    public String toString() {
        return "Resume{" +
                "name='" + name + '\'' +
                ", post='" + post + '\'' +
                ", workExperience=" + workExperience +
                '}';
    }
}

/**
 * 工作经历类
 */
public class WorkExperience implements Cloneable{
    private String timeArea;
    private String company;

    public WorkExperience(String timeArea, String company) {
        this.timeArea = timeArea;
        this.company = company;
    }

    public WorkExperience() {
    }

    @Override
    public WorkExperience clone(){
        WorkExperience workExperience = null;
        try {
            workExperience = (WorkExperience) super.clone();
        }catch (CloneNotSupportedException e){
            System.out.println("工作经历克隆失败");
        }
        return workExperience;
    }

    public String getTimeArea() {
        return timeArea;
    }

    public void setTimeArea(String timeArea) {
        this.timeArea = timeArea;
    }

    public String getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    @Override
    public String toString() {
        return "WorkExperience{" +
                "timeArea='" + timeArea + '\'' +
                ", company='" + company + '\'' +
                '}';
    }
}

/**
 * 测试客户端
 */
public class PrototypeDemo {
    public static void main(String[] args) {
        Resume resume = new Resume();
        resume.setName("软软");
        resume.setPost("JAVA开发工程师");
        resume.setWorkExperience("2019-2020", "阿里妈妈公司");
        System.out.println(resume);

        Resume clone = resume.clone();
        clone.setPost("软软");
        clone.setPost("前端工程师");
        clone.getWorkExperience().setCompany("阿里叔叔公司");
        System.out.println(clone.getWorkExperience());

    }
}