外观模式

packagecom.jerry.design.facade.imp;

publicinterfaceFacadeImp {

publicvoidtest();

publicvoidtestA();

publicvoidtestB();

publicvoidtestC();

}

实现类A：

packagecom.jerry.design.facade.impl;

importcom.jerry.design.facade.imp.FacadeImp;

publicclassTestAimplementsFacadeImp {

publicvoidtest(){

System.out.println(" i am TestA's test()!");

}

@Override

publicvoidtestA() {

System.out.println(" i am TestA's testA()!");

}

@Override

publicvoidtestB() {

}

@Override

publicvoidtestC() {

}

}

实现类B：

packagecom.jerry.design.facade.impl;

importcom.jerry.design.facade.imp.FacadeImp;

publicclassTestBimplementsFacadeImp {

publicvoidtest(){

System.out.println(" i am TestB's test()!");

}

@Override

publicvoidtestA() {

}

@Override

publicvoidtestB() {

System.out.println(" i am TestB's testB()!");

}

@Override

publicvoidtestC() {

}

}

实现类C：

packagecom.jerry.design.facade.impl;

importcom.jerry.design.facade.imp.FacadeImp;

publicclassTestCimplementsFacadeImp {

publicvoidtest(){

System.out.println(" i am TestC's test()!");

}

@Override

publicvoidtestA() {

}

@Override

publicvoidtestB() {

}

@Override

publicvoidtestC() {

System.out.println(" i am TestC's testC()!");

}

}

外观类：

packagecom.jerry.design.facade.impl;

publicclassFacade {

publicvoidtestFacadeImplA(){

newTestA().test();

newTestB().test();

newTestC().test();

}

publicvoidtestFacadeImplB(){

newTestA().testA();

newTestB().testB();

newTestC().testC();

}

}

调用代码：

packagecom.jerry.design.facade.client;

importcom.jerry.design.facade.impl.Facade;

publicclassTest {

/**

*@paramargs

*/

publicstaticvoidmain(String[] args) {

newFacade().testFacadeImplA();

// i am TestA's test()!

// i am TestB's test()!

// i am TestC's test()!

newFacade().testFacadeImplB();

// i am TestA's testA()!

// i am TestB's testB()!

// i am TestC's testC()!

}

}

总结：使子系统易用