设计模式【五】装饰模式

版权声明： https://blog.csdn.net/jiangxuexuanshuang/article/details/88528868

1、类图

2、实现

public interface IExport {

    void export();

}
public abstract class AbstractSyncExport implements IExport {

    protected IExport parentExport;

    public AbstractSyncExport(){}

    public AbstractSyncExport(IExport export) {
        this.parentExport = export;
    }

}

public class AsyncExport extends AbstractSyncExport {

    private String test = "init async";

    public AsyncExport(IExport sync) {
        super(sync);
    }

    @Override
    public void export() {
        this.parentExport.export();
        System.out.println(test);
        System.out.println("export type: async" );
    }
}

public class SyncExport extends AbstractSyncExport {

    public SyncExport(IExport export) {
        super(export);
    }

    @Override
    public void export() {
        this.parentExport.export();

        System.out.println("export type: sync");
    }

}

public class MainExport implements IExport {

    @Override
    public void export() {
        System.out.println("export type: begin");
    }
}

public class ExportTest {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException, ClassNotFoundException {
        IExport begin = new MainExport();
        IExport sync = new SyncExport(begin);
        IExport async = new AsyncExport(sync);

        async.export();
    }

}