组合模式(Composite)Java
2016-05-27
定义
(GoF《设计模式》)：将对象组合成树形结构以表示“部分整体”的层次结构。组合模式使得用户对单个对象和组合对象的使用具有一致性。
package ding.study.designpatterns.composite;
/**
* 公司类抽象啊
* @author daniel
*
*/
public abstract class Company {
protected String name;
//公司名字
public Company(String name){
this.name=name;
}
//添加公司或者部门
public abstract void add(Company c);
public abstract void remove(Company c);
//展示公司 或部门名称 层级
public abstract void display(int i);
//展示部门职能
public abstract void lineOfDuty();
}
package ding.study.designpatterns.composite;
import java.util.ArrayList;
import java.util.List;
/**
* 公司实现类
* @author daniel
*
*/
public class CompanyImpl extends Company {
//公司或者部门抽象
private List <Company> children=new ArrayList<Company>();
public CompanyImpl(String name){
super(name);
}
@Override
public void add(Company c) {
children.add(c);
}
@Override
public void display(int i) {
StringBuffer sb=new StringBuffer();
for(int j=0;j<i;j++){
sb.append("-");
}
System.out.println(sb.toString()+this.name);
for(Company company :children){
company.display(i+2);
}
}
@Override
public void lineOfDuty() {
for(Company company:children){
company.lineOfDuty();
}
}
@Override
public void remove(Company c) {
children.remove(c);
}}
package ding.study.designpatterns.composite;
/**
* 财务 部门类
* @author daniel
*
*/
public class FinanceDepartment extends Company {
public FinanceDepartment (String name){
super(name);
}
@Override
public void add(Company c) {
// TODO Auto-generated method stub
}
@Override
public void display(int i) {
StringBuffer sb=new StringBuffer();
for(int j=0;j<i;j++){
sb.append("-");
}
System.out.println(sb.toString()+this.name);
}
@Override
public void lineOfDuty() {
// TODO Auto-generated method stub
System.out.println(this.name+" 公司财务收支管理");
}
@Override
public void remove(Company c) {
// TODO Auto-generated method stub
}
}
package ding.study.designpatterns.composite;
/**
* HR部门类
* @author daniel
*
*/
public class HRDepartment extends Company {
public HRDepartment (String name){
super(name);
}
@Override
public void add(Company c) {
// TODO Auto-generated method stub
}
@Override
public void display(int i) {
StringBuffer sb=new StringBuffer();
for(int j=0;j<i;j++){
sb.append("-");
}
System.out.println(sb.toString()+this.name);
}
@Override
public void lineOfDuty() {
// TODO Auto-generated method stub
System.out.println(this.name+" 员工管理培训");
}
@Override
public void remove(Company c) {
// TODO Auto-generated method stub
}
}
执行
package ding.study.designpatterns.composite;
public class ZTestMain {
/**
* @author daniel
* @time 2016-5-27 下午12:41:27
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
CompanyImpl zong=new CompanyImpl("总公司");
zong.add(new HRDepartment("总公司HR"));
zong.add(new FinanceDepartment("总公司财务"));
CompanyImpl bj=new CompanyImpl("bj公司");
bj.add(new HRDepartment("bj公司HR"));
bj.add(new FinanceDepartment("bj公司财务"));
CompanyImpl sh=new CompanyImpl("sh公司");
sh.add(new HRDepartment("sh公司HR"));
sh.add(new FinanceDepartment("sh公司财务"));
zong.add(bj);
zong.add(sh);
System.out.println("-----------公司结构-------------");
zong.display(1);
System.out.println("-----------部门职能-------------");
zong.lineOfDuty();
}
}
结果
源码
https://github.com/dingsai88/StudyTest/tree/master/src/ding/study/designpatterns/composite