Design Patterns in Luster

2014 達暉資訊教育訓練課程 - Design Patterns

課程簡介：
蛇麼！居然可以～

行雲流水般回答何謂 觀察者模式
而不是 我認識它 但無法完整說出它是誰

看完整本 設計模式 書籍
而不是 三秒就倒頭入睡？

寫出 一段段自己滿意程式
而不是 質疑是否有更好寫法

其實 “Design Patterns” 並沒有這麼困難，這次的課程，我們會透過情境的方式，帶大家慢慢走入這個世界～

Transcript

1. Design Patterns © 2014 Luster
2. Me ㇼِ๊ ⼵ዾ⳻⭞ፒ㊴ӫٯ
   ⹔㕲೸⁰ഥ KBTPO!MVTUFSUFDIOFU
3. Reference 啓❔˗ፇ
4. ᄎⵠ
   
   "CTUSBDUJPO ౽⭉
   
   &ODBQTVMBUJPO ઑ঎
   
   1PMZNPSQIJTN ␷უ
   
   *OIFSJUBODF Object Oriented Basic
5. ⽤用情境，學設計模式
6. ฟˠฟˠ̴ո
7. ⽁ጊⵠெு⼷࿿ӷٻ ᘳኛ㟓ఇ
8. Class Diagram MallardDuck display() { } swim() quack() RedheadDuck display() { } swim() quack()
9. Class Diagram MallardDuck display() { } swim() quack() RedheadDuck display() { } swim() quack() Duck
10. Class Diagram MallardDuck display() { } display() { } RedheadDuck Duck swim() quack()
11. Class Diagram MallardDuck display() { } display() { } RedheadDuck Duck swim() quack() display()
12. Class Diagram MallardDuck display() { } display() { } RedheadDuck Duck swim() quack() display() ⭶⭶৙৙
    ₇㐤ḑ㚰୏
13. ᴴኁക॒ℍᬘ᥺ᨰ㡲
    ࿩ϻ᜜எቹচ㌾ᛵƭ
14. ଆₘ⇯ሰđಆ
    
    ڿϱ ᜫᎭɿ࠭ ྍ
15. ࿩ٯ㌾⬕
    ࢭᬛ㐰՟
    %VDL
    ˑְʽ
    GMZ
    ቿᝢ
    ဈ፞⎋့ḝ㚼୛௭ፚ㑞˺
    ⨪⇐ޭḝ㡧 “ ” ⽁ጊⵠெு⼷࿿፞㋀ӷٻ
    ⛝㚐ഄ⁼റ
    +BTPO
16. MallardDuck display() { } ⭶⭶৙৙
    ₇㐤ḑ㚰୏ Duck quack() display() swim() RedheadDuck display() { } ن Class Diagram
17. MallardDuck display() { } ⭶⭶৙৙
    ₇㐤ḑ㚰୏ Duck quack() display() swim() RedheadDuck display() { } fly() Jason’s Class Diagram
18. ʮ಻ԟɓ˂ රЍ෧ᇭᎭ௞್ɰึ࠭ə－ －|||
20. What’s happened ? Duck quack() display() swim() fly() RubberDuck quack() { 吱吱叫; } @Override display() { }
21. ⎋့㡲
    ʷ၂Ոӵ㎁Ջƭ
22. Duck quack() display() swim() fly() RubberDuck display() { } quack() { 吱吱叫; } @Override ˼ഌਣᙜ㡲⽾࿩௭
    ၂
    3VCCFS%VDL
    ḝ
    GMZ
    ᄋ␼ჱ
    ௭҃ᄋ␼
    RVBDL
    ʷᖈ㡧 “ ”
23. Jason’s Class Diagram II Duck quack() display() swim() fly() RubberDuck quack() { 吱吱叫; } @Override display() { } fly() { // Do nothing! } @Override
24. ਣᏋ̴รְٙӲ 㗚᧾㚼㡲
    ᬺˀፚٰ㡲ˀፚ㑞㡲ˀፚᡛ᝼㡲
    ⽾ٙፚਣ͹ہ㡺 “ ” FireDuck quack() { // Do nothing! } @Override display() { } fly() { // Do nothing! } @Override swim() { // Do nothing! } @Override
25. բᴫ⎋့ᄧδ㚼୛⨸ᨫ㡲
    ፚ௜▋ʾ՘ܦ̇⎧㟈㡺㡮৥⽜㡯 A. ⁼ීᾗࢭ৥϶ᘫ㐰՟ˑて⪹ B. ण⨸፮ḝ⨸ᨫˀዀሪⲇ C. ࿩ϻˀⓣⲌ㚼୛ⶴ▬ D. ㌬̴ศἏဈ፞㚼୛ḝӴ⾪⨸ᨫ E. 㚼୛ˀⓣڇዛٙ㑞ٰٙ F. ሪⲇፚ᭎ʷ㖍׈Ӵ⹇㡲⼠࿨Ӽ̨㚼୛ˀ༙⬕ḝሪⲇ
26. ਣᏋ̴รְӲ ፐ৥㚼୛ “ ” ࿭⑅ ፐ৥ḝ⨸ᨫ “ ” ᚢₓ㚼ḝ ⨸ᨫٙˀʷ▋ “ ”
27. ط౏Ⴛὺ⇟Ⴈὺӵ֥ٚൔđପ໡⃈҂൞ေ
28. ஼Ꭽᄲݟ ط౏Ⴛὺ⇟Ⴈὺӵ֥ٚൔđପ໡⃈҂൞ေ
29. ᨫ˺⽣ӣ
    ቹচʷ϶୛㐰՟㡲௭㏴⬙ெˀ㌾⬕ḝ⨸ᨫ࿭
    ቹচʷ϶ቹ⨸ᨫ㡲௭㏴てቹ௄⬣୛㐰՟㡲 “ ” ⮦⮦բᴫ̣㎁ਣ͹㡺
30. Duck display() swim() Flyable fly() Quackable quack() MallardDuck RedheadDuck RubberDuck ᨫ˺⽣ӣ
    ቹচʷ϶୛㐰՟㡲௭㏴⬙ெˀ㌾⬕ḝ⨸ᨫ࿭
    ቹচʷ϶ቹ⨸ᨫ㡲௭㏴てቹ௄⬣୛㐰՟㡲 “ ” ⮦⮦բᴫ̣㎁ਣ͹㡺
31. Duck display() swim() Flyable fly() Quackable quack() MallardDuck display() RedheadDuck display() RubberDuck display() ᨫ˺⽣ӣ
    ቹচʷ϶୛㐰՟㡲௭㏴⬙ெˀ㌾⬕ḝ⨸ᨫ࿭
    ቹচʷ϶ቹ⨸ᨫ㡲௭㏴てቹ௄⬣୛㐰՟㡲 “ ” ⮦⮦բᴫ̣㎁ਣ͹㡺
32. Duck display() swim() Flyable fly() Quackable quack() MallardDuck fly() display() RedheadDuck fly() display() RubberDuck display() ᨫ˺⽣ӣ
    ቹচʷ϶୛㐰՟㡲௭㏴⬙ெˀ㌾⬕ḝ⨸ᨫ࿭
    ቹচʷ϶ቹ⨸ᨫ㡲௭㏴てቹ௄⬣୛㐰՟㡲 “ ” ⮦⮦բᴫ̣㎁ਣ͹㡺
33. Duck display() swim() Flyable fly() Quackable quack() MallardDuck fly() display() quack() RedheadDuck fly() display() quack() RubberDuck display() quack() ᨫ˺⽣ӣ
    ቹচʷ϶୛㐰՟㡲௭㏴⬙ெˀ㌾⬕ḝ⨸ᨫ࿭
    ቹচʷ϶ቹ⨸ᨫ㡲௭㏴てቹ௄⬣୛㐰՟㡲 “ ” ⮦⮦բᴫ̣㎁ਣ͹㡺
34. Duck display() swim() Flyable fly() Quackable quack() MallardDuck display() RedheadDuck display() RubberDuck display() ৳ሼ㡲⁼ීᾗて⪹˺ “ ” fly() quack() fly() quack() quack()
35. ਣᏋ΄ዑ
    +BTPO㡲΄⬕๶㞲б ہ㡺
36. 設計守則 Design Principle
37. 1 ಁℨ๿ͻ
    ᐆⴳڠỉざ׷
    ܋װͷ౽⭉
38. ۃ Ù ڛ ʴፎ㑒
39. ۃ Ù ڛ ʴፎ㑒 ௕ⲇ׵٠Յ㡲ˍ௑⪝
40. ۃ Ù ڛ ௕ⲇ׵٠Յ㡲ˍ௑⪝ ʴፎ㑒
41. ۃ Ù ڛ ௕ⲇ׵٠Յ㡲ˍ௑⪝ ʴፎ㑒
42. ۃ Ù ڛ ʴፎ㑒 ௕ⲇ׵٠Յ㡲ˍ௑⪝
43. ۃ Ù ڛ ʴፎ㑒 ௕ⲇ׵٠Յ㡲ˍ௑⪝ 㚼୛㐰՟ ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ
44. 㚼୛㐰՟ ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ 1 ಁⴳڠ܋װ
    ͷ౽⭉
45. ౲ℨ๿
    ፽ㄡಇύ㒘⓵౲
    ͪ፽ㄡಇ౭Ъ⓵౲ 2
46. Program to an ! interface,! not an implementation. 2
47. 1SPHSBN
    UP
    BO
    JOUFSGBDF
    Ẃᙛḝ༲ຄዑ
    1SPHSBN
    UP
    B
    TVQFSUZQF
48. Example Soldier attack() Sniper attack() {! ! snipe();! } snipe() Stormtrooper attack() {! ! shoot();! } shoot() 4VQFSUZQF
    ٨̨ዅ
    ၖⲨ㐤Փ࿡̗㍵
49. Program to an implement Sniper soldier = new Sniper(); soldier.attack();
50. Program to an interface Sniper soldier = new Sniper(); soldier.attack(); Soldier soldier = new Sniper(); soldier.attack();
51. Sniper soldier = new Sniper(); soldier.attack(); Soldier soldier = new Sniper(); soldier.attack(); Soldier soldier = getSoldier(); soldier.attack(); #FUUFS
    TPMVUJPO㡧
    ࢡग⨬።㉖㡤ဆႍஂவⶻḑᬳ̲ Program to an interface
52. ࢄեᖇᇯ㚼୛
53. ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ QuackBehavior quack() << interface >> FlyBehavior fly() << interface >>
54. ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ QuackBehavior quack() << interface >> FlyBehavior fly() << interface >> Squeak quack() { 吱吱叫; } MuteQuack quack() { 不會叫; } Quack quack() { 呱呱叫; } FlyWithWings fly() { ⽤用翅膀飛; } FlyWithRocket fly() { ⽤用⽕火箭飛; } FlyNoWay fly() { 不會飛; }
55. Duck display() swim()
56. Duck display() swim() QuackBehavior quackBehavior FlyBehavior flyBehavior ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; }
57. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} }
58. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior ḗ⒅⨸ᨫ 㑞⨸⨸ᨫ public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { ! } public void performFly() {…} } quackBehavior.quack(); ㊕㆕ࢭኁ㡲
    㚼୛ᱞࢭፚ௕୾ḝ⨸ᨫ㡲
    ਫ਼ឳ㡮EFMFHBUF㡯⊸՟̘⢱ᱥ㡲
    ⑉ˀዑ௕୾எ⏻ࢭ▅ഋ࿭୛㐰՟⪠㡧
59. public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} } ⽾ਣ͹⮀எ㚼୛⨸ᨫḝ
    ு㕾ⲇቒ㡺
60. public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} } public class MallardDuck extends Duck { ! public MallardDuck() { quackBehavior = new Quack(); flyBehavior = new FlyWithNoWings(); } ! public void display() {…} } ࢭ୛㐰՟ḝෆᕌී⪠
61. ᡐ⮦
62. public class DuckSimulator { ! public static void main(String[] args) { Duck mallard = new MallardDuck(); mallard.performQuack(); } }
63. public class DuckSimulator { ! public static void main(String[] args) { Duck mallard = new MallardDuck(); mallard.performQuack(); } } ۃ
64. ׈ཙ⮀எ㚼୛⨸ᨫ
65. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} ! }
66. public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} ! } Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior setQuackBehavior() setFlyBehavior()
67. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior setQuackBehavior() setFlyBehavior() public abstract class Duck { QuackBehavior quackBehavior; FlyBehavior flyBehavior; ! public void performQuack() { quackBehavior.quack(); } public void performFly() {…} ! public void setQuackBehavior( QuackBehavior behavior) { this.quackBehavior = behavior; } public void setFlyBehavior… }
68. ᡐ⮦
69. public class DuckSimulator { ! public static void main(String[] args) { Duck mallard = new MallardDuck(); mallard.performQuack(); mallard.setQuackBehavior(new Squeak()); mallard.performQuack(); } } ۃ
70. public class DuckSimulator { ! public static void main(String[] args) { Duck mallard = new MallardDuck(); mallard.performQuack(); mallard.setQuackBehavior(new Squeak()); mallard.performQuack(); } }
71. public class DuckSimulator { ! public static void main(String[] args) { Duck mallard = new MallardDuck(); mallard.performQuack(); mallard.setQuackBehavior(new Squeak()); mallard.performQuack(); } } ڛ
72. ࿩ϻե൸б˺ܦ̇˼㡺
73. QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } ௅⪑㚰୏⨬᨟
74. Duck QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } MallardDuck display() swim() RedheadDuck display() swim() RubberDuck display() swim()
75. QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } MallardDuck display() RedheadDuck display() RubberDuck display() Duck display() swim() ʫ▪ש
76. Duck display() swim() QuackBehavior quackBehavior FlyBehavior flyBehavior QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } MallardDuck display() RedheadDuck display() RubberDuck display()
77. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } ੒ឧ
    EFMFHBUF MallardDuck display() RedheadDuck display() RubberDuck display()
78. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior setQuackBehavior() setFlyBehavior() QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } ּཌྷ⭴ஂ MallardDuck display() RedheadDuck display() RubberDuck display()
79. Duck display() swim() performQuack() performFly() QuackBehavior quackBehavior FlyBehavior flyBehavior setQuackBehavior() setFlyBehavior() QuackBehavior quack() << interface >> Quack quack() { 呱; } MuteQuack quack() {} Squeak quack() { 吱; } FlyBehavior fly() << interface >> FlyWithWings fly() { 拍翅膀; } FlyNoWay fly() {} FlyWithRocket fly() { 噴射; } *4" )"4" *.1-&.&/5 MallardDuck display() RedheadDuck display() RubberDuck display()
80. 3 ઑᷗ⍋ܮ
    ಋᷗ␷უ
81. ⊟ڃ㡲
    Ⲍᬿ̾ˣ㉢ḝ㊕φⲇศፐෳຌ㡲
    ΄ᴢ▊ٴ̴ࢭण⨸፮ፐᄱ୾ϻ
82. ຾ޞ΄㡲୶ፚℴʷ϶
    ⮀⭩ᖇී
83. ຾ޞ΄㡲୶ፚℴʷ϶
    ⮀⭩ᖇී ⅒ᵖᖇී
    4USBUFHZ
84. 策略模式 Strategy
85. ఺⒧͡⍋ᦤ∤᠎ Strategy 㚼୛㑞⨸⨸ᨫ
86. ఺⒧͡⍋ᦤ∤᠎ ಁᝎҠᦤ∤᠎で౽⭉⸃ю Strategy 㚼୛㑞⨸⨸ᨫ ᴫ␒┴㑞Ƭ᧾Ↄ㑞Ƭ ˀፚ㑞
87. ఺⒧͡⍋ᦤ∤᠎ ಁᝎҠᦤ∤᠎で౽⭉⸃ю ⴸϒҥ΍㍹ܟϞ἖Ϋᐃᇝ Strategy 㚼୛㑞⨸⨸ᨫ ᴫ␒┴㑞Ƭ᧾Ↄ㑞Ƭ ˀፚ㑞 㞷◨௝㚼ٴ̴㋽ዛᴫ᧾ Ↄ㑞㡲࿭⑅ᴫ␒┴㑞
88. ఺⒧͡⍋ᦤ∤᠎ ಁᝎҠᦤ∤᠎で౽⭉⸃ю ⴸϒҥ΍㍹ܟϞ἖Ϋᐃᇝ Strategy ⇾Ḃᘳ๿ⴸᦤ∤᠎ỉⴳٳ
    ͪᐆ຺㔂ؐчᷗᦤ∤᠎ỉℨ๿
89. 為什麼我們需要學設計模式
90. Z > B
91. Z > B
92. "MJDF
    ࿝⬋ӭ॓㌞॓㡦Ӫםˆ⠩㡦 Ӫ॓㞚ⓞ㌞㡦ࡷֳ॓⻆㒷 ㌞␆㡦⽞ፒʱ᎙٩ᕣ㡛 +BTPO
    ʱ̍๖ᕣՁ̆㑲㡛
93. "MJDF
    ࿝⬋ӭ॓㌞॓㡦Ӫםˆ⠩㡦 Ӫ॓㞚ⓞ㌞㡦ࡷֳ॓⻆㒷 ㌞␆㡦⽞ፒʱ᎙٩ᕣ㡛 ̜ϯӰவ㞼ʫᕼḑ㑰㞼㡙 +BTPO
    ʱ̍๖ᕣՁ̆㑲㡛
94. Jas "MJDF
    +BTPO㡦⯤ൎ࿝ံ࿼ፒ㚲୏ḑ㑔⨭⨭ ᨟ٕԺΙ㡪௉୲ϰ௅⪓࿜ʬϫʬϫ㐦 Ք㡦˂ʺⲂ୲ϰவ͵ʬϫ㑔⨭ḑ̘㍷㡛 ! ˘ทӻൎ࿝Ⲃ㚲୏ḑ㐦Ք٩̩ۍ٥⼏ ˼㑔⨭⨭᨟
95. +BTPO
    "MJDF㡦ਸ਼٤⬋⯎ⅆ ᵊᕻ෇㡦࿝௡ྦྷ˯ݭ㡛
96. ⮀⭩ᖇී
    ⓣ১Ⲍ৪͠ˣ㉢๢⼟ḝᢡ⼚
97. 結論
98. 變 化 設 計
99. Thanks ⼵ዾ⳻⭞
    Jason Chung