大话设计模式-访问者模式-公司部门角色功能

向右看齐 2023-06-26 05:57 14阅读 0赞

## 1.代码结构及UML ##

![在这里插入图片描述][20191230190729581.png_pic_center]![UML][]

## 2.Manager ##

###### 2.1 Manager ######

package Manager;
    
    import Visitor.Visitor;
    
    /** * @ClassName: Manager.Manager * @Description: Manager.Manager 定义一个accept操作 以访问者为参数 */
    public abstract class Manager { 
        /** * 用来接受添加功能 * * @param visitor */
        public abstract void accept(Visitor visitor);
    }

###### 2.2 DepartManager ######

package Manager;
    
    import Visitor.Visitor;
    
    /** * @ClassName: DepartManager * @Description: 部门管理员（DepartManager） */
    public class DepartManager extends Manager { 
    
        private String name;
    
        public DepartManager() { 
        }
    
        public DepartManager(String name) { 
            this.name = "部门管理员 " + name;
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        @Override
        public void accept(Visitor visitor) { 
            visitor.AddEmployee(this);
        }
    }

###### 2.3 CompanyManager ######

package Manager;
    
    import Visitor.Visitor;
    
    /** * @ClassName: CompanyManager * @Description: 公司管理员（CompanyManager） */
    public class CompanyManager extends Manager { 
    
        private String name;
    
        public CompanyManager() { 
        }
    
        public CompanyManager(String name) { 
            this.name = "公司管理员 " + name;
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
        @Override
        public void accept(Visitor visitor) { 
            visitor.AddDepartment(this);
        }
    }

## 3.Visitor ##

###### 3.1 Visitor ######

package Visitor;
    
    import Manager.CompanyManager;
    import Manager.DepartManager;
    
    /** * @ClassName: Visitor.Visitor * @Description: Visitor.Visitor 为Manager中的每一个具体实现类声明一个Visit操作 */
    public abstract class Visitor { 
        /** * 添加部门 * * @param companyManager */
        public abstract void AddDepartment(CompanyManager companyManager);
    
        /** * 添加雇员 * * @param departManager */
        public abstract void AddEmployee(DepartManager departManager);
    }

###### 3.2 CreateEmployee ######

package Visitor;
    
    import Manager.CompanyManager;
    import Manager.DepartManager;
    
    /** * @ClassName: CreateEmployee * @Description: 创建员工的操作 */
    public class CreateEmployee extends Visitor { 
        /** * 添加部门 * * @param companyManager */
        @Override
        public void AddDepartment(CompanyManager companyManager) { 
            System.out.println(companyManager.getName() + " 没有添加部门权限！");
        }
    
        /** * 添加雇员 * * @param departManager */
        @Override
        public void AddEmployee(DepartManager departManager) { 
            System.out.println(departManager.getName() + " 添加雇员成功");
        }
    }

###### 3.3 CreateDepartment ######

package Visitor;
    
    import Manager.CompanyManager;
    import Manager.DepartManager;
    
    /** * @ClassName: CreateDepartment * @Description: 创建部门的操作 */
    public class CreateDepartment extends Visitor { 
        /** * 添加部门 * * @param companyManager */
        @Override
        public void AddDepartment(CompanyManager companyManager) { 
            System.out.println(companyManager.getName() + " 添加部门成功");
        }
    
        /** * 添加雇员 * * @param departManager */
        @Override
        public void AddEmployee(DepartManager departManager) { 
            System.out.println(departManager.getName() + " 没有添加雇员权限！");
        }
    }

## 4.ObjectStructure ##

import Manager.Manager;
    import Visitor.Visitor;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /** * @ClassName: ObjectStructure * @Description: ObjectStructure提供一个高层的接口以允许访问者访问它的元素 */
    public class ObjectStructure { 
        private List<Manager> managers = new ArrayList<Manager>();
    
        public void add(Manager manager) { 
            managers.add(manager);
        }
    
        public void remove(Manager manager) { 
            managers.remove(manager);
        }
    
        public void accept(Visitor visitor) { 
            for (Manager manager : managers) { 
                manager.accept(visitor);
            }
        }
    }

## 5.Test ##

import Manager.CompanyManager;
    import Manager.DepartManager;
    import Visitor.CreateDepartment;
    import Visitor.CreateEmployee;
    import Visitor.Visitor;
    
    /** * @ClassName: Main * @Description: 测试类 */
    public class Test{ 
        public static void main(String[] args) { 
            ObjectStructure objectStructure = new ObjectStructure();
            objectStructure.add(new CompanyManager("张三"));
            objectStructure.add(new DepartManager("李四"));
    
            Visitor visitor1 = new CreateDepartment();
            Visitor visitor2 = new CreateEmployee();
    
            objectStructure.accept(visitor1);
            objectStructure.accept(visitor2);
        }
    }

## 6.运行截图 ##

![在这里插入图片描述][20191230191223413.png_pic_center]

[20191230190729581.png_pic_center]: https://img-blog.csdnimg.cn/20191230190729581.png#pic_center
[UML]: https://img-blog.csdnimg.cn/20191230191755951.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9sb2NhbGhvc3QuYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
[20191230191223413.png_pic_center]: https://img-blog.csdnimg.cn/20191230191223413.png#pic_center