设计模式——门面模式

package designpattern.structure.facade;

public class Facade {

    Subsystemclass1 s1 = new Subsystemclass1();
    Subsystemclass2 s2 = new Subsystemclass2();
    Subsystemclass3 s3 = new Subsystemclass3();
    
    public void method1() {
        s1.methodx();
        s2.methody();
    }
    

    public void method2() {
        s1.methodx();
        s3.methodz();
    }
    

    public void method3() {
        s2.methody();
        s3.methodz();
    }
    
}

package designpattern.structure.facade;

public class Subsystemclass1 {

    public void methodx() {
        System.out.println("Subsystemclass1.methodx()");
    }
}

package designpattern.structure.facade;

public class Subsystemclass2 {

    public void methody() {
        System.out.println("Subsystemclass1.methody()");
    }
}

package designpattern.structure.facade;

public class Subsystemclass3 {

    public void methodz() {
        System.out.println("Subsystemclass2.methodz()");
    }
}


package designpattern.structure.facade;


/**
 * 
 * 客户端只需要一个facade类的引用即可，将子系统的工作交给facade处理
 * ， 从而不用直接和子系统的各种类打交道。
 * 
 * 避免了客户端的复杂性
 * 
 */
public class Client {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Facade f = new Facade();
        f.method1();
        f.method2();
        f.method3();
    }

}