java设计模式之中介者模式 轻松掌握java中介者模式

public class Demo {

 public static void main(String[] args) {
 Mediator m = new Mediator();
 Department d1 = new Department(m, "开发部");
 Department d2 = new Department(m, "财务部");
 Department d3 = new Department(m, "策划部");
 m.add(d1, "dep");
 m.add(d2, "fin");
 m.add(d3, "c");
 d2.apply("手里有一个项目需要开发", "dep");
 d1.apply("开发项目需要资金", "fin");
 d1.apply("项目开发完了，需要策划发布", "c");
 d3.apply("发布会需要资金", "fin");
 }
}

class Department{
 
 private String name;

 private Mediator mediator;
 
 public Department(Mediator mediator,String name) {
 this.name = name;
 this.mediator = mediator;
 }
 
 public String getName() {
 return name;
 }

 public void setName(String name) {
 this.name = name;
 }
 
 public void apply(String thing,String coordinate){
 System.out.println("我们是"+this.getName()+","+thing+",需要帮助");
 mediator.dispatch(this, thing, coordinate);
 }
 
 public void handle(String name,String thing){
 System.out.println("我们是"+this.getName()+","+name+"需要我们的帮助，我们马上处理他们的事情");
 System.out.println("*******************************************");
 }
}
/**
 *中介者对象，持有所有同事对象，负责调度各部门协调工作 
 */
class Mediator{
 private String name;
 
 private Map<String, Department> map = new HashMap<String, Department>();
 
 public void add(Department d,String name){
 this.map.put(name, d);
 }
 
 public void dispatch(Department dpt,String thing,String coordinate){
 Department d = map.get(coordinate);
 d.handle(dpt.getName(),thing);
 }
}