Android学习笔记--设计模式之建造者

建立一个javaBean用来存放数据信息

package chouxianglianxi;

public class DuanXinBao {
    private int qian;
    private int shuliang;
    public int getQian() {
        return qian;
    }
    public void setQian(int qian) {
        this.qian = qian;
    }
    public int getShuliang() {
        return shuliang;
    }
    public void setShuliang(int shuliang) {
        this.shuliang = shuliang;
    }
    
    
}

建立一个接口

package chouxianglianxi;

public interface IJieKou {
    //为金额赋值
    void booqian();
    //为数量赋值
    void booshuliang();
    //返回有数据的类
    DuanXinBao dduanxin();
}

建立类继承接口

package chouxianglianxi;

public class ShiXian implements IJieKou {
    private DuanXinBao duanxinbao;

    public ShiXian(){
        //new出来实例
        duanxinbao = new DuanXinBao();
    }
    @Override
    public void booqian() {
        //赋值
        duanxinbao.setQian(100);
    }

    @Override
    public void booshuliang() {
        //赋值
        duanxinbao.setShuliang(5000);
    }

    @Override
    public DuanXinBao dduanxin() {
        //返回出去
        return duanxinbao;
    }

}

建立一个文件

package chouxianglianxi;

public class MessageDLod {
    //返回类型为Bean
    public DuanXinBao getduanxin(IJieKou ijiekou){
        //
        if(ijiekou != null){
            //执行赋值的方法
            ijiekou.booqian();
            ijiekou.booshuliang();
            //赋值完毕把它返回出去
            return ijiekou.dduanxin();
        }
        return null;
    }
}

客户端文件

package chouxianglianxi;

public class Client {
    public static void main(String[] args) {
        //里面有数量和金额的文件
        IJieKou is = new ShiXian();
        //构造者
        MessageDLod messag = new MessageDLod();
        //拿到文件为它赋值
        DuanXinBao duanxinbao = messag.getduanxin(is);
        //读取
        System.out.println(duanxinbao.getQian());
        System.out.println(duanxinbao.getShuliang());
    }
}