简单工厂

接口类：

packagecom.jerry.design.simpleFactory.imp;

/**

*

*@authorjerry

*

*/

publicinterfaceinterfaceTest {

publicvoidtest(String name);

}

实现类A：

packagecom.jerry.design.simpleFactory.impl;

importcom.jerry.design.simpleFactory.imp.interfaceTest;

/**

*

*@authorjerry

*

*/

publicclassImplAimplementsinterfaceTest {

publicvoidtest(String name){

System.out.println(" my ImplA name is："+name);

}

}

实现类B：

packagecom.jerry.design.simpleFactory.impl;

importcom.jerry.design.simpleFactory.imp.interfaceTest;

/**

*

*@authorjerry

*

*/

publicclassImplBimplementsinterfaceTest {

publicvoidtest(String name){

System.out.println(" my ImplB name is："+name);

}

}

工厂类：

packagecom.jerry.design.simpleFactory.factory;

importcom.jerry.design.simpleFactory.imp.interfaceTest;

importcom.jerry.design.simpleFactory.impl.ImplA;

importcom.jerry.design.simpleFactory.impl.ImplB;

publicclassFactory {

publicstaticinterfaceTest createImp(inttype){

interfaceTest test =null;

if(type==1){

test = (interfaceTest)newImplA();

}elseif(type==2){

test = (interfaceTest)newImplB();

}

returntest;

}

}

测试类：

packagecom.jerry.design.simpleFactory.factory;

importcom.jerry.design.simpleFactory.imp.interfaceTest;

publicclassTest {

publicstaticvoidmain(String[] args) {

interfaceTest test = Factory.createImp(1);

test.test(" i am jerry!");// my ImplA name is： i amjerry!

test = Factory.createImp(2);

test.test(" i am jerry!");// my ImplB name is： i amjerry!

}

}

总结：简单工厂其实就是要选择实现的类而已。