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享元模式，组合模式
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rmzf9192 committed Jan 2, 2020
1 parent 9c02214 commit 57d611a
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31 changes: 31 additions & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/Client.java
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package com.el.jichu.designpattern.composite.test;

public class Client {

public static void main(String[] args) {
//从大到小创建对象 学校
OrganizationComponent university = new University("清华大学", " 中国顶级大学 ");

//创建 学院
OrganizationComponent computerCollege = new College("计算机学院", " 计算机学院 ");
OrganizationComponent infoEngineercollege = new College("信息工程学院", " 信息工程学院 ");


//创建各个学院下面的系(专业)
computerCollege.add(new Department("软件工程", " 软件工程不错 "));
computerCollege.add(new Department("网络工程", " 网络工程不错 "));
computerCollege.add(new Department("计算机科学与技术", " 计算机科学与技术是老牌的专业 "));

//
infoEngineercollege.add(new Department("通信工程", " 通信工程不好学 "));
infoEngineercollege.add(new Department("信息工程", " 信息工程好学 "));

//将学院加入到 学校
university.add(computerCollege);
university.add(infoEngineercollege);

//university.print();
infoEngineercollege.print();
}

}
53 changes: 53 additions & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/College.java
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package com.el.jichu.designpattern.composite.test;

import java.util.ArrayList;
import java.util.List;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:36
* @Version V1.0
*/
public class College extends OrganizationComponent {

//List 中 存放的Department
List<OrganizationComponent> organizationComponents = new ArrayList<OrganizationComponent>();

// 构造器
public College(String name, String des) {
super(name, des);
}

// 重写add
@Override
protected void add(OrganizationComponent organizationComponent) {
// 将来实际业务中，Colleage 的 add 和 University add 不一定完全一样
organizationComponents.add(organizationComponent);
}

// 重写remove
@Override
protected void remove(OrganizationComponent organizationComponent) {
organizationComponents.remove(organizationComponent);
}

@Override
public String getName() {
return super.getName();
}

@Override
public String getDes() {
return super.getDes();
}

// print方法，就是输出University 包含的学院
@Override
protected void print() {
System.out.println("--------------" + getName() + "--------------");
//遍历 organizationComponents
for (OrganizationComponent organizationComponent : organizationComponents) {
organizationComponent.print();
}
}
}
32 changes: 32 additions & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/Department.java
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package com.el.jichu.designpattern.composite.test;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:38
* @Version V1.0
*/
public class Department extends OrganizationComponent {
//没有集合

public Department(String name, String des) {
super(name, des);
}


//add , remove 就不用写了，因为他是叶子节点

@Override
public String getName() {
return super.getName();
}

@Override
public String getDes() {
return super.getDes();
}

@Override
protected void print() {
System.out.println(getName());
}
}
47 changes: 47 additions & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/OrganizationComponent.java
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package com.el.jichu.designpattern.composite.test;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:35
* @Version V1.0
*/
public abstract class OrganizationComponent {
private String name; // 名字
private String des; // 说明

protected void add(OrganizationComponent organizationComponent) {
//默认实现
throw new UnsupportedOperationException();
}

protected void remove(OrganizationComponent organizationComponent) {
//默认实现
throw new UnsupportedOperationException();
}

//构造器
public OrganizationComponent(String name, String des) {
super();
this.name = name;
this.des = des;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getDes() {
return des;
}

public void setDes(String des) {
this.des = des;
}

//方法print, 做成抽象的, 子类都需要实现
protected abstract void print();
}
50 changes: 50 additions & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/University.java
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package com.el.jichu.designpattern.composite.test;

import java.util.ArrayList;
import java.util.List;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:39
* @Version V1.0
*/
public class University extends OrganizationComponent {
List<OrganizationComponent> organizationComponents = new ArrayList<OrganizationComponent>();

// 构造器
public University(String name, String des) {
super(name, des);
}

// 重写add
@Override
protected void add(OrganizationComponent organizationComponent) {
organizationComponents.add(organizationComponent);
}

// 重写remove
@Override
protected void remove(OrganizationComponent organizationComponent) {
organizationComponents.remove(organizationComponent);
}

@Override
public String getName() {
return super.getName();
}

@Override
public String getDes() {
return super.getDes();
}

// print方法，就是输出University 包含的学院
@Override
protected void print() {
System.out.println("--------------" + getName() + "--------------");
//遍历 organizationComponents
for (OrganizationComponent organizationComponent : organizationComponents) {
organizationComponent.print();
}
}
}
1 change: 1 addition & 0 deletions src/main/java/com/el/jichu/designpattern/composite/test/composite.md
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组合模式有时又叫部分-整体模式在处理类似树形结构的问题时比较方便
Binary file added src/main/java/com/el/jichu/designpattern/composite/test/学校院系专业组合关系图.png
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33 changes: 33 additions & 0 deletions src/main/java/com/el/jichu/designpattern/flyweight/test/Client.java
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package com.el.jichu.designpattern.flyweight.test;

public class Client {

public static void main(String[] args) {
// 创建一个工厂类
WebSiteFactory factory = new WebSiteFactory();

// 客户要一个以新闻形式发布的网站
WebSite webSite1 = factory.getWebSiteCategory("新闻");


webSite1.use(new User("tom"));

// 客户要一个以博客形式发布的网站
WebSite webSite2 = factory.getWebSiteCategory("博客");

webSite2.use(new User("jack"));

// 客户要一个以博客形式发布的网站
WebSite webSite3 = factory.getWebSiteCategory("博客");

webSite3.use(new User("smith"));

// 客户要一个以博客形式发布的网站
WebSite webSite4 = factory.getWebSiteCategory("博客");

webSite4.use(new User("king"));

System.out.println("网站的分类共=" + factory.getWebSiteCount());
}

}
21 changes: 21 additions & 0 deletions src/main/java/com/el/jichu/designpattern/flyweight/test/ConcreteWebSite.java
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package com.el.jichu.designpattern.flyweight.test;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:59
* @Version V1.0
*/
public class ConcreteWebSite extends WebSite {
//共享的部分，内部状态
private String type = ""; //网站发布的形式(类型)

//构造器
public ConcreteWebSite(String type) {

this.type = type;
}
@Override
public void use(User user) {
System.out.println("网站的发布形式为:" + type + " 在使用中 .. 使用者是" + user.getName());
}
}
67 changes: 67 additions & 0 deletions src/main/java/com/el/jichu/designpattern/flyweight/test/ConnectionPool.java
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package com.el.jichu.designpattern.flyweight.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Vector;

/**
* @Auther: roman.zhang
* @Date: 2018/12/28 10:39
* @Version:V1.0
* @Description:ConnectionPool:数据库连接池代码 通过连接池的管理，实现了数据库连接的共享，不需要每一次都重新创建连接，
* 节省了数据 库重新创建的开销，提升了系统的性能！
*/
public class ConnectionPool {

private Vector<Connection> pool;

//公有属性
private String url = "jdbc:mysql://localhost:3306/test";

private String username = "root";

private String password = "root";
private String driverClassName = "com.mysql.jdbc.Driver";

private int poolSize = 100;

private static ConnectionPool instance = null;

Connection connection = null;

//构造方法，做一些初始化工作
private ConnectionPool() {
pool = new Vector<Connection>(poolSize);

for (int i = 0; i < poolSize; i++) {
try {
Class.forName(driverClassName);
connection = DriverManager.getConnection(url, username, password);
pool.add(connection);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

//返回连接到数据库连接池
public synchronized void release() {
pool.add(connection);
}

//返回连接到一个数据库连接池
public synchronized Connection getConnection() {
if (pool.size() > 0) {
Connection connection = pool.get(0);
pool.remove(connection);
return connection;
} else {
return null;
}
}


}
23 changes: 23 additions & 0 deletions src/main/java/com/el/jichu/designpattern/flyweight/test/User.java
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package com.el.jichu.designpattern.flyweight.test;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:58
* @Version V1.0
*/
public class User {
private String name;

public User(String name) {
super();
this.name = name;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}
10 changes: 10 additions & 0 deletions src/main/java/com/el/jichu/designpattern/flyweight/test/WebSite.java
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package com.el.jichu.designpattern.flyweight.test;

/**
* @author roman zhangfei
* @Date 2019/12/18 16:58
* @Version V1.0
*/
public abstract class WebSite {
public abstract void use(User user);//抽象方法
}
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