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();
}

}