组合模式

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抽象构件角色(Component)： 定义参加组合的对象的共有方法和属性， 可以定义一些默认的行为或属性；

package com.yy.compositePattern.tree3;

public abstract class Corp {

	private String name = ""; 

	private String position = ""; 

	private int salary = 0; 
	
	//父节点是谁 
	private Corp parent = null; 
	
	public Corp(String name,String position,int salary){
		this.name = name;
		this.position = position;
		this.salary = salary;
	}
	//获得员工信息 
	 public String getInfo(){ 
	  String info = ""; 
	  info = "姓名：" + this.name; 
	  info = info + "\t职位："+ this.position; 
	  info = info + "\t薪水：" + this.salary; 
	  return info; 
	 } 
	 
	 //设置父节点 
	 protected void setParent(Corp _parent){ 
		 this.parent = _parent; 
		} 
		 
	//得到父节点 
	public Corp getParent(){ 
	 return this.parent; 
	}
}

 

 

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叶子构件（Leaf）： 叶子对象， 其下再也没有其他的分支

package com.yy.compositePattern.tree3;

/**
 *  Leaf是树叶节点，在这里就是我们这些小兵 
 * @author Administrator
 *
 */
public class Leaf extends Corp{

	public Leaf(String name, String position, int salary) {
		super(name, position, salary);
	}

}

 

 

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树枝构件（Composite）： 树枝对象， 它的作用是组合树枝节点和叶子节点

package com.yy.compositePattern.tree3;

import java.util.ArrayList;

/**
 * 这些树枝节点也就是这些领导们既要有自己的信息，还要知道自己的下属情况
 * @author Administrator
 *
 */
public class Branch extends Corp {

	//领导下边有那些下级领导和小兵 
	 ArrayList<Corp> subordinateList = new ArrayList<Corp>();
	 
	public Branch(String name, String position, int salary) {
		super(name, position, salary);
	}

	//增加一个下属，可能是小头目，也可能是个小兵 
	public void addSubordinate(Corp corp) { 
	 corp.setParent(this); //设置父节点 
	 this.subordinateList.add(corp); 
	} 
	
	//我有哪些下属 
	public ArrayList<Corp> getSubordinate() { 
	 return this.subordinateList; 
	} 
}

 

 

客户端调用

package com.yy.compositePattern.tree3;

import java.util.ArrayList;

public class Client3 {

	public static void main(String[] args) {
		//首先是组装一个组织结构出来 
		Branch ceo = compositeCorpTree(); 
		 
		//首先把CEO的信息打印出来： 
		System.out.println(ceo.getInfo()); 
		 
		//然后是所有员工信息 
		System.out.println(getTreeInfo(ceo)); 
	}
	
	//把整个树组装出来 
	public static Branch compositeCorpTree(){ 
	 //首先产生总经理CEO 
	 Branch root = new Branch("王大麻子","总经理",100000); 
	 //把三个部门经理产生出来 
	 Branch developDep = new Branch("刘大瘸子","研发部门经理",10000); 
	 Branch salesDep = new Branch("马二拐子","销售部门经理",20000); 
	 Branch financeDep = new Branch("赵三驼子","财务部经理",30000); 
	  
	 //再把三个小组长产生出来 
	 Branch firstDevGroup = new Branch("杨三乜斜","开发一组组长",5000); 
	 Branch secondDevGroup = new Branch("吴大棒槌","开发二组组长",6000); 
	  
	 //把所有的小兵都产生出来 
	 Leaf a = new Leaf("a","开发人员",2000); 
	 Leaf b = new Leaf("b","开发人员",2000); 
	 Leaf c = new Leaf("c","开发人员",2000); 
	 Leaf d = new Leaf("d","开发人员",2000); 
	 Leaf e = new Leaf("e","开发人员",2000); 
	 Leaf f = new Leaf("f","开发人员",2000); 
	 Leaf h = new Leaf("h","销售人员",5000); 
	 Leaf i = new Leaf("i","销售人员",4000); 
	 Leaf j = new Leaf("j","财务人员",5000); 
	 Leaf k = new Leaf("k","CEO秘书",8000); 
	 Leaf zhengLaoLiu = new Leaf("郑老六","研发部副经理",20000); 
	  
	 //开始组装 
	 //CEO下有三个部门经理和一个秘书 
	  root.addSubordinate(k); 
	  root.addSubordinate(developDep); 
	  root.addSubordinate(salesDep); 
	  root.addSubordinate(financeDep); 
	   
	   
	  //研发部经理 
	  developDep.addSubordinate(zhengLaoLiu); 
	  developDep.addSubordinate(firstDevGroup); 
	  developDep.addSubordinate(secondDevGroup); 
	   
	   
	   
	  //看看开发两个开发小组下有什么 
	  firstDevGroup.addSubordinate(a); 
	  firstDevGroup.addSubordinate(b); 
	  firstDevGroup.addSubordinate(c); 
	  secondDevGroup.addSubordinate(d); 
	  secondDevGroup.addSubordinate(e); 
	  secondDevGroup.addSubordinate(f); 
	   
	  //再看销售部下的人员情况 
	  salesDep.addSubordinate(h); 
	  salesDep.addSubordinate(i); 
	   
	  //最后一个财务 
	  financeDep.addSubordinate(j); 
	   
	  return root; 
	 } 
	  
	 //遍历整棵树,只要给我根节点，我就能遍历出所有的节点 
	 public static String getTreeInfo(Branch root){ 
	  ArrayList<Corp> subordinateList = root.getSubordinate(); 
	  String info = ""; 
	  for(Corp s :subordinateList){ 
	   if(s instanceof Leaf){ //是员工就直接获得信息 
	    info = info + s.getInfo()+"\n"; 
	   }else{ //是个小头目 
	    info = info + s.getInfo() +"\n"+ getTreeInfo((Branch)s); 
	   } 
	  } 
	   
	  return info; 
	 } 
}

 

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