Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Object Oriented Training - Session 4
Search
hatelove
July 09, 2012
Technology
1
5.1k
Object Oriented Training - Session 4
里氏替換原則、最小知識原則、介面隔離原則、依賴反轉原則
hatelove
July 09, 2012
Tweet
Share
More Decks by hatelove
See All by hatelove
1. 在沙箱中開發
hatelove
12
3k
BDD in .NET - TDD 在實務上的最後一塊拼圖
hatelove
4
2.8k
OO training 基本原則整理
hatelove
2
5.2k
OO training homework 3 review and summary
hatelove
1
11k
OO training homework 2 review and summary
hatelove
1
4.6k
OO training homework 1 review and summary
hatelove
1
8k
Object Oriented Training - Session 3
hatelove
1
11k
Object Oriented Training - Session 2
hatelove
1
4.8k
Object Oriented Training - Session 1
hatelove
1
8.3k
Other Decks in Technology
See All in Technology
Goに育てられ開発者向けセキュリティ事業を立ち上げた僕が今向き合う、AI × セキュリティの最前線 / Go Conference 2025
flatt_security
0
370
小学4年生夏休みの自由研究「ぼくと Copilot エージェント」
taichinakamura
0
590
『OCI で学ぶクラウドネイティブ 実践 × 理論ガイド』 書籍概要
oracle4engineer
PRO
3
170
from Sakichi Toyoda to Agile
kawaguti
PRO
1
110
綺麗なデータマートをつくろう_データ整備を前向きに考える会 / Let's create clean data mart
brainpadpr
3
370
E2Eテスト設計_自動化のリアル___Playwrightでの実践とMCPの試み__AIによるテスト観点作成_.pdf
findy_eventslides
1
570
AIAgentの限界を超え、 現場を動かすWorkflowAgentの設計と実践
miyatakoji
1
160
OCI Network Firewall 概要
oracle4engineer
PRO
2
7.8k
AWS IoT 超入門 2025
hattori
0
290
カンファレンスに託児サポートがあるということ / Having Childcare Support at Conferences
nobu09
1
500
Oracle Base Database Service 技術詳細
oracle4engineer
PRO
11
78k
KMP の Swift export
kokihirokawa
0
350
Featured
See All Featured
Faster Mobile Websites
deanohume
310
31k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
31
9.7k
GitHub's CSS Performance
jonrohan
1032
470k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
333
22k
How to train your dragon (web standard)
notwaldorf
96
6.3k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
30
2.9k
Agile that works and the tools we love
rasmusluckow
331
21k
Making the Leap to Tech Lead
cromwellryan
135
9.6k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.5k
The Cost Of JavaScript in 2023
addyosmani
53
9k
Navigating Team Friction
lara
189
15k
Documentation Writing (for coders)
carmenintech
75
5k
Transcript
Trainer: Joey Chen Date: 2012/07/02 Object Oriented Training – Session
4
- 2 - 回顧 – OO三特性 封裝 繼承 多型
- 3 - 回顧 – 抽象 interface abstract
- 4 - 回顧 – SOLID S • 單一職責原則 O
• 開放封閉原則 L I D
SOLID
Liskov Substitution Principle 里氏替換原則
- 7 -
- 8 - Liskov Substitution Principle • 情況 – 當父類行為不符合子類需求,且子類無法
override 時 – 當子類繼承父類,卻無法正常替代父類運作時 • 規範繼承關係 – 確保多型可正常運作
SOLID
Least Knowledge Principle ( Law of Demeter ) 最少知識原則 (
狄米特法則 )
- 11 -
- 12 - Least Knowledge Principle • 規範封裝範圍 • 任何物件對外只開放
– 最少且缺一不可的資訊
SOLID
Interface Segregation Principle 介面隔離原則
- 15 - 哪一個方便使用
- 16 - Interface Segregation Principle • 介面的單一職責 – 介面也應該內聚,避免出現「胖」介面
• 規範依賴程度 – 一個物件對另一個物件的依賴,應建立在最小的介面上 – 不要強迫依賴了沒使用的方法,這是種介面污染 胖
SOLID
Dependency Inversion Principle 依賴反轉原則
- 19 - Dependency Inversion Principle • 依賴於抽象 • 高層模組不依賴於底層模組
– 都依賴於抽象
- 20 - 依賴於介面
- 21 - 結論 S O L L I D
- 22 - 回顧
- 23 - 作業 – 幫DAO穿衣服 • 原本需求 – Product資料異動時,需記錄log,查詢不用
– 對Product進行CRUD時,需檢查權限 • 重構需求 – 將權限驗證與log相關職責,從ProductDao獨立出來 – 讓ProductDao只處理CRUD的需求 • 需求異動 – 在測試環境時,不檢查權限與不記錄log – 檢查測試環境條件,請使用Context.IsTestEnvironment
- 24 - 原始程式 class diagram
- 25 - 重構的 class diagram
Thanks for your listening Q & A