???????????Bridge Pattern??????????????????????????????????????????仯????????????????????????????????????????????????????????????????仯?????????????????????????????????????????????
????????????????
????????????е??????
???????????????????????????BMT??BenZ??Land Rover?????????????????????????????????????????????????????????????????????3*3=9????
????1????ü?з???????????


??????????????????????????????????????????????????N??????????????M??仯???????MNMN???????????????????????????????
???????????????Transmission???????????????????嵵??AMT?????????????3????BMWAMT??BenZAMT??LandRoverAMT??
????2??????????
????????????????

???????????????????????????????????M*N??????????????????????仯??????????????????????
????????????????????嵵?????????????AMT????
????????????????????
????1??????
???????????￡?
????package com.jasongj.brand;import com.jasongj.transmission.Transmission;public abstract class AbstractCar {
????protected Transmission gear;
????public abstract void run();
????public void setTransmission(Transmission gear) {  this.gear = gear;
????}
????}
????2?????????BMW???
???????????￡?
????package com.jasongj.brand;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class BMWCar extends AbstractCar{
????private static final Logger LOG = LoggerFactory.getLogger(BMWCar.class);
????@Override
????public void run() {
????gear.gear();
????LOG.info("BMW is running");
????};
????}
????3??BenZCar
???????????￡?
????package com.jasongj.brand;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class BenZCar extends AbstractCar{
????private static final Logger LOG = LoggerFactory.getLogger(BenZCar.class);
????@Override
????public void run() {
????gear.gear();
????LOG.info("BenZCar is running");
????};
????}
????4??LandRoverCar
???????????￡?
????package com.jasongj.brand;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class LandRoverCar extends AbstractCar{
????private static final Logger LOG = LoggerFactory.getLogger(LandRoverCar.class);
????@Override
????public void run() {
????gear.gear();
????LOG.info("LandRoverCar is running");
????};
????}
????5???????????
???????????￡?
????package com.jasongj.transmission;public abstract class Transmission{
????public abstract void gear();
????}
????6???????
???????????￡?
????package com.jasongj.transmission;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class Manual extends Transmission {
????private static final Logger LOG = LoggerFactory.getLogger(Manual.class); @Override
????public void gear() {
????LOG.info("Manual transmission");
????}
????}
????7???????
???????????￡?
????package com.jasongj.transmission;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class Auto extends Transmission {
????private static final Logger LOG = LoggerFactory.getLogger(Auto.class); @Override
????public void gear() {
????LOG.info("Auto transmission");
????}
????}
????8?????????????????????????????????????????????????????????????
???????????￡?
????package com.jasongj.client;import com.jasongj.brand.AbstractCar;import com.jasongj.brand.BMWCar;import com.jasongj.brand.BenZCar;import com.jasongj.transmission.Auto;import com.jasongj.transmission.Manual;import com.jasongj.transmission.Transmission;public class BridgeClient {
????public static void main(String[] args) {
????Transmission auto = new Auto();
????AbstractCar bmw = new BMWCar();
????bmw.setTransmission(auto);
????bmw.run();
????Transmission manual = new Manual();
????AbstractCar benz = new BenZCar();
????benz.setTransmission(manual);
????benz.run();
????}
????}