中介模式（Mediator） 中介樣本 java實現

package Mediator.MyTest;//租房者abstract class lodger {int maxmoney;int minmoney;String name;public abstract void rented();public abstract void statisticsHouse();}

package Mediator.MyTest;//  房東abstract class landlord {int money;String name;public abstract void rent();public abstract void statisticsPerson();}

package Mediator.MyTest;class landlordperson extends landlord{    Mediator mt;public landlordperson(String name,int money,Mediator mt){this.mt=mt;this.name=name;this.money=money;mt.collectinLandlord(this);}@Overridepublic void rent() {System.out.println("房東需要的出租金為"+money);}@Overridepublic void statisticsPerson() {mt.statisticsPerson(this);}}

package Mediator.MyTest;class lodgerperson extends lodger {Mediator mt;public lodgerperson(String name, int minmoney, int maxmoney, Mediator mt) {this.mt = mt;this.name = name;this.maxmoney = maxmoney;this.minmoney = minmoney;mt.collectinLodger(this);}@Overridepublic void rented() {System.out.println("房客需要租金為" + minmoney + "元到" + maxmoney + "左右的");}@Overridepublic void statisticsHouse() {mt.statisticsHouse(this);}}

中介的抽象方法

package Mediator.MyTest;abstract class Mediator{public Mediator(String name){System.out.println("中介公司："+name);}//收集租房者public abstract void collectinLodger(lodger ld);//收集房東public abstract void collectinLandlord(landlord ll);//統計符合指定租房者要求的房子public abstract void statisticsHouse(lodger ld);//統計符合指定房東要求的房客public abstract void statisticsPerson(landlord ll);}

package Mediator.MyTest;import java.util.ArrayList;class MediatorA extends Mediator{ArrayList<lodger> lodgers=new ArrayList<lodger>();ArrayList<landlord> landlords=new ArrayList<landlord>();public MediatorA() {super("MediatorA");}@Overridepublic void collectinLandlord(landlord ll) {landlords.add(ll);}@Overridepublic void collectinLodger(lodger ld) {lodgers.add(ld);}@Overridepublic void statisticsHouse(lodger ld) {System.out.print("滿足租房者"+ld.name+"要求的房子有:");for(landlord landlord:landlords){if(landlord.money<=ld.maxmoney&&landlord.money>=ld.minmoney){System.out.print(landlord.name+":"+landlord.money+";");}}}@Overridepublic void statisticsPerson(landlord ll) {System.out.print("滿足房東"+ll.name+"要求的房客有:");for(lodger  lodger:lodgers){if(ll.money<=lodger.maxmoney&&ll.money>=lodger.minmoney){System.out.print(ll.name+":"+ll.money+";");}}}}

測試方法：

package Mediator.MyTest;import java.util.ArrayList;public class MediatorTest {/** * （Mediator）中介者模式的Java實現 *  * 中介介紹房子給需要租房的人 房東脫中介介紹 *  * @param args */public static void main(String[] args) {MediatorA ma=new MediatorA();landlordperson lp1=new landlordperson("房東1",200,ma);landlordperson lp2=new landlordperson("房東2",400,ma);landlordperson lp3=new landlordperson("房東3",800,ma);lodgerperson ld1=new lodgerperson("房客1",100,300,ma);lodgerperson ld2=new lodgerperson("房客2",0,100,ma);lodgerperson ld3=new lodgerperson("房客3",400,800,ma);lodgerperson ld4=new lodgerperson("房客4",600,10000,ma);ld1.statisticsHouse();ld3.statisticsHouse();System.out.println();lp1.statisticsPerson();}}