{"id":1914,"date":"2026-03-23T15:34:04","date_gmt":"2026-03-23T15:34:04","guid":{"rendered":"https:\/\/www.tech-posts.com\/vi\/key-ooad-terminology-students\/"},"modified":"2026-03-23T15:34:04","modified_gmt":"2026-03-23T15:34:04","slug":"key-ooad-terminology-students","status":"publish","type":"post","link":"https:\/\/www.tech-posts.com\/vi\/key-ooad-terminology-students\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn OOAD: C\u00e1c thu\u1eadt ng\u1eef quan tr\u1ecdng m\u00e0 m\u1ecdi h\u1ecdc sinh ph\u1ea3i bi\u1ebft"},"content":{"rendered":"
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\"Charcoal<\/figure>\n<\/div>\n

Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ng\u00f4n ng\u1eef quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c tri\u1ec3n khai. Ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD) d\u1ef1a v\u00e0o m\u1ed9t b\u1ed9 t\u1eeb v\u1ef1ng c\u1ee5 th\u1ec3 \u0111\u1ec3 m\u00f4 t\u1ea3 c\u00e1ch c\u00e1c h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng, c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac v\u00e0 c\u00e1ch c\u00e1c th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. Kh\u00f4ng c\u00f3 s\u1ef1 hi\u1ec3u bi\u1ebft chung v\u1ec1 nh\u1eefng thu\u1eadt ng\u1eef n\u00e0y, giao ti\u1ebfp gi\u1eefa c\u00e1c b\u00ean li\u00ean quan, nh\u00e0 ph\u00e2n t\u00edch v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n s\u1ebd b\u1ecb ph\u00e1 v\u1ee1. H\u01b0\u1edbng d\u1eabn n\u00e0y n\u00eau r\u00f5 c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n t\u1ea1o n\u00ean n\u1ec1n t\u1ea3ng c\u1ee7a ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m hi\u1ec7n \u0111\u1ea1i.<\/p>\n

\ud83c\udfd7\ufe0f Nh\u1eefng kh\u1ed1i x\u00e2y d\u1ef1ng c\u1ed1t l\u00f5i: L\u1edbp v\u00e0 \u0110\u1ed1i t\u01b0\u1ee3ng<\/h2>\n

Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7 ph\u1ee9c t\u1ea1p, ta c\u1ea7n hi\u1ec3u r\u00f5 c\u00e1c \u0111\u01a1n v\u1ecb c\u1ea5u tr\u00fac ch\u00ednh. OOAD coi d\u1eef li\u1ec7u v\u00e0 h\u00e0nh vi nh\u01b0 m\u1ed9t th\u1ef1c th\u1ec3 duy nh\u1ea5t.<\/p>\n

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  • L\u1edbp:<\/strong> M\u1ed9t b\u1ea3n v\u1ebd ho\u1eb7c khu\u00f4n m\u1eabu t\u1eeb \u0111\u00f3 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra. N\u00f3 \u0111\u1ecbnh ngh\u0129a tr\u1ea1ng th\u00e1i (thu\u1ed9c t\u00ednh) v\u00e0 h\u00e0nh vi (ph\u01b0\u01a1ng th\u1ee9c) m\u00e0 c\u00e1c th\u1ec3 hi\u1ec7n k\u1ebft qu\u1ea3 s\u1ebd s\u1edf h\u1eefu. H\u00e3y h\u00ecnh dung n\u00f3 nh\u01b0 m\u1ed9t b\u1ea3n thi\u1ebft k\u1ebf ki\u1ebfn tr\u00fac cho m\u1ed9t ng\u00f4i nh\u00e0, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u00ednh ng\u00f4i nh\u00e0 \u0111\u00f3.<\/li>\n
  • \u0110\u1ed1i t\u01b0\u1ee3ng:<\/strong> M\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t l\u1edbp. Khi m\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o, b\u1ed9 nh\u1edb \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 cho \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00f3. N\u1ebfu l\u1edbp l\u00e0 b\u1ea3n v\u1ebd, th\u00ec \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 c\u00f4ng tr\u00ecnh th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb b\u1ea3n v\u1ebd \u0111\u00f3.<\/li>\n
  • Thu\u1ed9c t\u00ednh:<\/strong> C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 thu\u1ed9c t\u00ednh ho\u1eb7c tr\u01b0\u1eddng, \u0111\u1ea1i di\u1ec7n cho tr\u1ea1ng th\u00e1i ho\u1eb7c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef b\u00ean trong m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m t\u00ean ng\u01b0\u1eddi d\u00f9ng, s\u1ed1 d\u01b0 t\u00e0i kho\u1ea3n ho\u1eb7c gi\u00e1 s\u1ea3n ph\u1ea9m.<\/li>\n
  • Ph\u01b0\u01a1ng th\u1ee9c:<\/strong> M\u1ed9t h\u00e0m ho\u1eb7c th\u1ee7 t\u1ee5c li\u00ean k\u1ebft v\u1edbi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111\u1ecbnh ngh\u0129a h\u00e0nh vi c\u1ee7a n\u00f3. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c cho ph\u00e9p \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00ednh t\u1ed5ng ho\u1eb7c g\u1eedi th\u00f4ng b\u00e1o.<\/li>\n
  • H\u00e0m t\u1ea1o:<\/strong> M\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c g\u1ecdi khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u1ea1o ra. N\u00f3 kh\u1edfi t\u1ea1o tr\u1ea1ng th\u00e1i c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ebfn m\u1ed9t \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u h\u1ee3p l\u1ec7.<\/li>\n
  • H\u00e0m h\u1ee7y:<\/strong> M\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c g\u1ecdi khi m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ecb h\u1ee7y. N\u00f3 x\u1eed l\u00fd c\u00e1c nhi\u1ec7m v\u1ee5 d\u1ecdn d\u1eb9p, ch\u1eb3ng h\u1ea1n nh\u01b0 gi\u1ea3i ph\u00f3ng b\u1ed9 nh\u1edb ho\u1eb7c \u0111\u00f3ng k\u1ebft n\u1ed1i t\u1ec7p.<\/li>\n<\/ul>\n

    \ud83e\udde9 B\u1ed1n tr\u1ee5 c\u1ed9t c\u1ee7a h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng<\/h2>\n

    B\u1ed1n nguy\u00ean t\u1eafc n\u00e0y ph\u00e2n bi\u1ec7t c\u00e1c h\u1ec7 th\u1ed1ng h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng th\u1ee7 t\u1ee5c. Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m linh ho\u1ea1t v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec.<\/p>\n

    1. Tr\u1eebu t\u01b0\u1ee3ng \ud83e\udde0<\/h3>\n

    Tr\u1eebu t\u01b0\u1ee3ng bao g\u1ed3m vi\u1ec7c che gi\u1ea5u c\u00e1c chi ti\u1ebft tri\u1ec3n khai ph\u1ee9c t\u1ea1p v\u00e0 ch\u1ec9 hi\u1ec3n th\u1ecb c\u00e1c t\u00ednh n\u0103ng thi\u1ebft y\u1ebfu c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng. N\u00f3 cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1eadp trung v\u00e0o \u0111i\u1ec1u g\u00ec<\/em>m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0m ch\u1ee9 kh\u00f4ng ph\u1ea3i c\u00e1ch th\u1ee9c<\/em>n\u00f3 th\u1ef1c hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n

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    • Giao di\u1ec7n:<\/strong> M\u1ed9t h\u1ee3p \u0111\u1ed3ng \u0111\u1ecbnh ngh\u0129a m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u00e0 m\u1ed9t l\u1edbp ph\u1ea3i tri\u1ec3n khai, m\u00e0 kh\u00f4ng cung c\u1ea5p chi ti\u1ebft tri\u1ec3n khai.<\/li>\n
    • L\u1edbp tr\u1eebu t\u01b0\u1ee3ng:<\/strong> M\u1ed9t l\u1edbp kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c kh\u1edfi t\u1ea1o ri\u00eang l\u1ebb v\u00e0 nh\u1eb1m m\u1ee5c \u0111\u00edch \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba. N\u00f3 c\u00f3 th\u1ec3 ch\u1ee9a c\u1ea3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c tr\u1eebu t\u01b0\u1ee3ng (kh\u00f4ng c\u00f3 th\u00e2n) v\u00e0 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u1ee5 th\u1ec3 (c\u00f3 th\u00e2n).<\/li>\n<\/ul>\n

      2. \u0110\u00f3ng g\u00f3i \ud83d\udd12<\/h3>\n

      \u0110\u00f3ng g\u00f3i k\u1ebft h\u1ee3p d\u1eef li\u1ec7u v\u00e0 ph\u01b0\u01a1ng th\u1ee9c l\u1ea1i v\u1edbi nhau trong khi h\u1ea1n ch\u1ebf truy c\u1eadp tr\u1ef1c ti\u1ebfp v\u00e0o m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y b\u1ea3o v\u1ec7 tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 kh\u1ecfi s\u1ef1 can thi\u1ec7p t\u1eeb b\u00ean ngo\u00e0i.<\/p>\n

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      • C\u00e1c b\u1ed9 gi\u1edbi h\u1ea1n truy c\u1eadp:<\/strong>C\u00e1c quy t\u1eafc ki\u1ec3m so\u00e1t t\u00ednh hi\u1ec3n th\u1ecb. C\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/li>\n
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        • C\u00f4ng khai:<\/em>C\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o kh\u00e1c.<\/li>\n
        • Ri\u00eang t\u01b0:<\/em>Ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong l\u1edbp \u0111\u1ecbnh ngh\u0129a.<\/li>\n
        • B\u1ea3o v\u1ec7:<\/em>C\u00f3 th\u1ec3 truy c\u1eadp trong l\u1edbp v\u00e0 c\u00e1c l\u1edbp con c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n
        • Ph\u01b0\u01a1ng th\u1ee9c l\u1ea5y\/\u0111\u1eb7t:<\/strong>C\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecdc ho\u1eb7c thay \u0111\u1ed5i c\u00e1c thu\u1ed9c t\u00ednh ri\u00eang t\u01b0 m\u1ed9t c\u00e1ch an to\u00e0n.<\/li>\n<\/ul>\n

          3. K\u1ebf th\u1eeba \ud83c\udf33<\/h3>\n

          K\u1ebf th\u1eeba cho ph\u00e9p m\u1ed9t l\u1edbp m\u1edbi ti\u1ebfp nh\u1eadn c\u00e1c thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a m\u1ed9t l\u1edbp hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y th\u00fac \u0111\u1ea9y kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng m\u00e3 v\u00e0 thi\u1ebft l\u1eadp m\u1ed1i quan h\u1ec7 ph\u00e2n c\u1ea5p.<\/p>\n

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          • L\u1edbp cha\/L\u1edbp si\u00eau:<\/strong>L\u1edbp \u0111ang \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba.<\/li>\n
          • L\u1edbp con\/L\u1edbp con:<\/strong>L\u1edbp k\u1ebf th\u1eeba t\u1eeb l\u1edbp cha.<\/li>\n
          • Ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c:<\/strong>Khi m\u1ed9t l\u1edbp con cung c\u1ea5p m\u1ed9t tri\u1ec3n khai c\u1ee5 th\u1ec3 cho m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong l\u1edbp cha c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n

            4. \u0110a h\u00ecnh \ud83d\udd04<\/h3>\n

            \u0110a h\u00ecnh cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a c\u00e1c l\u1edbp kh\u00e1c nhau \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a m\u1ed9t l\u1edbp si\u00eau chung. N\u00f3 cho ph\u00e9p m\u1ed9t giao di\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ed9t l\u1edbp h\u00e0nh \u0111\u1ed9ng chung.<\/p>\n

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            • \u0110a h\u00ecnh th\u1eddi gian bi\u00ean d\u1ecbch:<\/strong>\u0110\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c, n\u01a1i nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c chia s\u1ebb c\u00f9ng m\u1ed9t t\u00ean nh\u01b0ng c\u00f3 danh s\u00e1ch tham s\u1ed1 kh\u00e1c nhau.<\/li>\n
            • \u0110a h\u00ecnh th\u1eddi gian ch\u1ea1y:<\/strong>\u0110\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua vi\u1ec7c ph\u00e2n ph\u1ed1i ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ed9ng, n\u01a1i ph\u01b0\u01a1ng th\u1ee9c c\u1ee5 th\u1ec3 c\u1ea7n th\u1ef1c thi \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh th\u1ef1c thi ch\u01b0\u01a1ng tr\u00ecnh.<\/li>\n<\/ul>\n

              \ud83d\udd17 Hi\u1ec3u r\u00f5 c\u00e1c m\u1ed1i quan h\u1ec7<\/h2>\n

              C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng hi\u1ebfm khi t\u1ed3n t\u1ea1i m\u1ed9t c\u00e1ch c\u00f4 l\u1eadp. Ch\u00fang t\u01b0\u01a1ng t\u00e1c th\u00f4ng qua c\u00e1c m\u1ed1i quan h\u1ec7. Vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c k\u1ebft n\u1ed1i n\u00e0y l\u00e0 nhi\u1ec7m v\u1ee5 ch\u00ednh trong ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf.<\/p>\n

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              • Li\u00ean k\u1ebft:<\/strong>M\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac n\u01a1i c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a m\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a l\u1edbp kh\u00e1c. N\u00f3 \u0111\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7 \u201cc\u00f3-m\u1ed9t\u201d.<\/li>\n
              • T\u1ed5 h\u1ee3p:<\/strong>M\u1ed9t d\u1ea1ng \u0111\u1eb7c bi\u1ec7t c\u1ee7a li\u00ean k\u1ebft \u0111\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7 \u201cto\u00e0n th\u1ec3-ph\u1ea7n\u201d, trong \u0111\u00f3 ph\u1ea7n c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp v\u1edbi to\u00e0n th\u1ec3. N\u1ebfu to\u00e0n th\u1ec3 b\u1ecb h\u1ee7y, ph\u1ea7n v\u1eabn t\u1ed3n t\u1ea1i.<\/li>\n
              • Th\u00e0nh ph\u1ea7n:<\/strong> M\u1ed9t d\u1ea1ng m\u1ea1nh h\u01a1n c\u1ee7a s\u1ef1 k\u1ebft h\u1ee3p. B\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp v\u1edbi to\u00e0n th\u1ec3. N\u1ebfu to\u00e0n th\u1ec3 b\u1ecb ph\u00e1 h\u1ee7y, b\u1ed9 ph\u1eadn c\u0169ng b\u1ecb ph\u00e1 h\u1ee7y.<\/li>\n
              • S\u1ef1 ph\u1ee5 thu\u1ed9c:<\/strong> M\u1ed9t m\u1ed1i quan h\u1ec7 trong \u0111\u00f3 m\u1ed9t l\u1edbp s\u1eed d\u1ee5ng l\u1edbp kh\u00e1c nh\u01b0 tham s\u1ed1 ho\u1eb7c tr\u1ea3 v\u1ec1 n\u00f3 nh\u01b0 k\u1ebft qu\u1ea3. \u0110\u00e2y l\u00e0 m\u1ed9t m\u1ed1i quan h\u1ec7 t\u1ea1m th\u1eddi \u201cs\u1eed d\u1ee5ng-m\u1ed9t\u201d.<\/li>\n
              • \u0110a d\u1ea1ng:<\/strong> X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t l\u1edbp li\u00ean quan \u0111\u1ebfn m\u1ed9t th\u1ec3 hi\u1ec7n duy nh\u1ea5t c\u1ee7a l\u1edbp kh\u00e1c (v\u00ed d\u1ee5: m\u1ed9t-nhi\u1ec1u, nhi\u1ec1u-nhi\u1ec1u).<\/li>\n<\/ul>\n

                \ud83d\udcca M\u00f4 h\u00ecnh h\u00f3a v\u1edbi UML<\/h2>\n

                Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML) l\u00e0 k\u00fd hi\u1ec7u chu\u1ea9n \u0111\u1ec3 tr\u1ef1c quan h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng. Trong khi OOAD l\u00e0 quy tr\u00ecnh, th\u00ec UML l\u00e0 ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00e0i li\u1ec7u h\u00f3a n\u00f3.<\/p>\n

                S\u01a1 \u0111\u1ed3 l\u1edbp<\/h3>\n

                Lo\u1ea1i s\u01a1 \u0111\u1ed3 ph\u1ed5 bi\u1ebfn nh\u1ea5t. N\u00f3 m\u00f4 t\u1ea3 c\u1ea5u tr\u00fac t\u0129nh c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng b\u1eb1ng c\u00e1ch hi\u1ec3n th\u1ecb c\u00e1c l\u1edbp, thu\u1ed9c t\u00ednh, ph\u01b0\u01a1ng th\u1ee9c v\u00e0 m\u1ed1i quan h\u1ec7. N\u00f3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n \u0111\u1ed3 cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n tri\u1ec3n khai h\u1ec7 th\u1ed1ng.<\/p>\n

                S\u01a1 \u0111\u1ed3 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng<\/h3>\n

                T\u1eadp trung v\u00e0o c\u00e1c y\u00eau c\u1ea7u ch\u1ee9c n\u0103ng t\u1eeb g\u00f3c nh\u00ecn ng\u01b0\u1eddi d\u00f9ng. N\u00f3 hi\u1ec3n th\u1ecb c\u00e1c t\u00e1c nh\u00e2n (ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i) v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng (m\u1ee5c ti\u00eau) m\u00e0 h\u1ecd mu\u1ed1n \u0111\u1ea1t \u0111\u01b0\u1ee3c.<\/p>\n

                S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1<\/h3>\n

                Minh h\u1ecda c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c trong m\u1ed9t t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 theo th\u1eddi gian. N\u00f3 nh\u1ea5n m\u1ea1nh th\u1ee9 t\u1ef1 c\u00e1c tin nh\u1eafn \u0111\u01b0\u1ee3c truy\u1ec1n gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 ho\u00e0n th\u00e0nh m\u1ed9t nhi\u1ec7m v\u1ee5.<\/p>\n

                S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng<\/h3>\n

                Gi\u1ed1ng nh\u01b0 s\u01a1 \u0111\u1ed3 lu\u1ed3ng, ch\u00fang m\u00f4 t\u1ea3 lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n t\u1eeb ho\u1ea1t \u0111\u1ed9ng n\u00e0y sang ho\u1ea1t \u0111\u1ed9ng kh\u00e1c. Ch\u00fang h\u1eefu \u00edch \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a logic c\u1ee7a c\u00e1c quy t\u1eafc kinh doanh ph\u1ee9c t\u1ea1p.<\/p>\n

                \ud83d\udccb B\u1ea3ng tham kh\u1ea3o nhanh<\/h2>\n

                S\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y \u0111\u1ec3 xem l\u1ea1i c\u00e1c thu\u1eadt ng\u1eef c\u1ed1t l\u00f5i m\u1ed9t c\u00e1ch nhanh ch\u00f3ng.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
                Thu\u1eadt ng\u1eef<\/th>\n\u0110\u1ecbnh ngh\u0129a<\/th>\nSo s\u00e1nh<\/th>\n<\/tr>\n<\/thead>\n
                L\u1edbp<\/strong><\/td>\nM\u1ed9t b\u1ea3n v\u1ebd m\u1eabu cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td>\nC\u00f4ng th\u1ee9c trong s\u1ed5 tay n\u1ea5u \u0103n<\/td>\n<\/tr>\n
                \u0110\u1ed1i t\u01b0\u1ee3ng<\/strong><\/td>\nM\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t l\u1edbp.<\/td>\nM\u1ed9t chi\u1ebfc b\u00e1nh \u0111\u01b0\u1ee3c n\u01b0\u1edbng t\u1eeb c\u00f4ng th\u1ee9c<\/td>\n<\/tr>\n
                Bao \u0111\u00f3ng<\/strong><\/td>\nH\u1ea1n ch\u1ebf truy c\u1eadp v\u00e0o c\u00e1c th\u00e0nh ph\u1ea7n.<\/td>\nM\u1ed9t vi\u00ean nang che gi\u1ea5u thu\u1ed1c<\/td>\n<\/tr>\n
                K\u1ebf th\u1eeba<\/strong><\/td>\nThu \u0111\u01b0\u1ee3c c\u00e1c thu\u1ed9c t\u00ednh t\u1eeb m\u1ed9t l\u1edbp cha.<\/td>\nC\u00e1c \u0111\u1eb7c \u0111i\u1ec3m di truy\u1ec1n \u0111\u01b0\u1ee3c truy\u1ec1n cho con c\u00e1i<\/td>\n<\/tr>\n
                \u0110a h\u00ecnh<\/strong><\/td>\nGiao di\u1ec7n gi\u1ed1ng nhau, h\u00e0nh vi kh\u00e1c nhau.<\/td>\nM\u1ed9t \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa cho c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau<\/td>\n<\/tr>\n
                Li\u00ean k\u1ebft<\/strong><\/td>\nM\u1ed9t m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c l\u1edbp.<\/td>\nM\u1ed9t ng\u01b0\u1eddi s\u1edf h\u1eefu m\u1ed9t chi\u1ebfc xe h\u01a1i<\/td>\n<\/tr>\n
                Th\u00e0nh ph\u1ea7n<\/strong><\/td>\nM\u1ed1i quan h\u1ec7 s\u1edf h\u1eefu m\u1ea1nh m\u1ebd.<\/td>\nM\u1ed9t tr\u00e1i tim thu\u1ed9c v\u1ec1 m\u1ed9t c\u01a1 th\u1ec3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                \ud83d\udee0\ufe0f Ph\u00e2n t\u00edch so v\u1edbi Thi\u1ebft k\u1ebf<\/h2>\n

                Ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c giai \u0111o\u1ea1n ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf gi\u00fap \u00e1p d\u1ee5ng \u0111\u00fang thu\u1eadt ng\u1eef \u1edf giai \u0111o\u1ea1n th\u00edch h\u1ee3p trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n.<\/p>\n

                Ph\u00e2n t\u00edch h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOA)<\/h3>\n

                T\u1eadp trung v\u00e0o \u0111i\u1ec1u g\u00ec<\/em> h\u1ec7 th\u1ed1ng ph\u1ea3i l\u00e0m g\u00ec. N\u00f3 x\u00e1c \u0111\u1ecbnh mi\u1ec1n v\u1ea5n \u0111\u1ec1 v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u00e1c y\u00eau c\u1ea7u m\u00e0 kh\u00f4ng xem x\u00e9t c\u00e1c gi\u1edbi h\u1ea1n k\u1ef9 thu\u1eadt.<\/p>\n

                  \n
                • M\u00f4 h\u00ecnh mi\u1ec1n:<\/strong> M\u1ed9t bi\u1ec3u di\u1ec5n v\u1ec1 c\u00e1c kh\u00e1i ni\u1ec7m v\u00e0 m\u1ed1i quan h\u1ec7 trong mi\u1ec1n v\u1ea5n \u0111\u1ec1.<\/li>\n
                • Ng\u01b0\u1eddi tham gia:<\/strong> M\u1ed9t th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng.<\/li>\n
                • Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/strong> M\u1ed9t m\u00f4 t\u1ea3 v\u1ec1 m\u1ed9t chu\u1ed7i c\u00e1c h\u00e0nh \u0111\u1ed9ng cung c\u1ea5p gi\u00e1 tr\u1ecb c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng cho m\u1ed9t ng\u01b0\u1eddi tham gia.<\/li>\n<\/ul>\n

                  Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOD)<\/h3>\n

                  T\u1eadp trung v\u00e0o c\u00e1ch th\u1ee9c<\/em> h\u1ec7 th\u1ed1ng s\u1ebd th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 nh\u01b0 th\u1ebf n\u00e0o. N\u00f3 chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh ph\u00e2n t\u00edch th\u00e0nh m\u1ed9t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt.<\/p>\n

                    \n
                  • M\u1eabu ki\u1ebfn tr\u00fac:<\/strong> M\u1ed9t c\u1ea5u tr\u00fac c\u01a1 b\u1ea3n cho h\u1ec7 th\u1ed1ng (v\u00ed d\u1ee5: L\u1edbp, MVC).<\/li>\n
                  • M\u1eabu thi\u1ebft k\u1ebf:<\/strong> M\u1ed9t gi\u1ea3i ph\u00e1p c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft m\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn trong thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m.<\/li>\n
                  • Giao di\u1ec7n:<\/strong> M\u1ed9t \u0111\u1ecbnh ngh\u0129a v\u1ec1 h\u1ee3p \u0111\u1ed3ng cho s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n.<\/li>\n<\/ul>\n

                    \ud83e\udde9 T\u1ed5ng quan v\u1ec1 M\u1eabu thi\u1ebft k\u1ebf<\/h2>\n

                    C\u00e1c m\u1eabu thi\u1ebft k\u1ebf l\u00e0 nh\u1eefng gi\u1ea3i ph\u00e1p \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh cho c\u00e1c v\u1ea5n \u0111\u1ec1 l\u1eb7p l\u1ea1i. Ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 m\u00e3 ngu\u1ed3n, m\u00e0 l\u00e0 c\u00e1c m\u1eabu h\u01b0\u1edbng d\u1eabn c\u00e1ch gi\u1ea3i quy\u1ebft m\u1ed9t v\u1ea5n \u0111\u1ec1.<\/p>\n

                    C\u00e1c m\u1eabu t\u1ea1o l\u1eadp<\/h3>\n

                    X\u1eed l\u00fd c\u00e1c c\u01a1 ch\u1ebf t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m Singleton (\u0111\u1ea3m b\u1ea3o ch\u1ec9 c\u00f3 m\u1ed9t th\u1ec3 hi\u1ec7n t\u1ed3n t\u1ea1i) v\u00e0 Factory (x\u1eed l\u00fd vi\u1ec7c t\u1ea1o \u0111\u1ed1i t\u01b0\u1ee3ng m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c \u0111\u1ecbnh r\u00f5 l\u1edbp c\u1ee5 th\u1ec3).<\/p>\n

                    C\u00e1c m\u1eabu c\u1ea5u tr\u00fac<\/h3>\n

                    X\u1eed l\u00fd vi\u1ec7c k\u1ebft h\u1ee3p gi\u1eefa l\u1edbp v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m Adapter (cho ph\u00e9p c\u00e1c giao di\u1ec7n kh\u00f4ng t\u01b0\u01a1ng th\u00edch ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau) v\u00e0 Decorator (th\u00eam h\u00e0nh vi cho \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ed9t c\u00e1ch \u0111\u1ed9ng).<\/p>\n

                    C\u00e1c m\u1eabu h\u00e0nh vi<\/h3>\n

                    X\u1eed l\u00fd giao ti\u1ebfp gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. C\u00e1c v\u00ed d\u1ee5 bao g\u1ed3m Observer (th\u00f4ng b\u00e1o cho c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u1ec1 s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i) v\u00e0 Strategy (\u0111\u1ecbnh ngh\u0129a m\u1ed9t gia \u0111\u00ecnh c\u00e1c thu\u1eadt to\u00e1n).<\/p>\n

                    \ud83d\ude80 T\u1ea1i sao thu\u1eadt ng\u1eef l\u1ea1i quan tr\u1ecdng<\/h2>\n

                    S\u1eed d\u1ee5ng \u0111\u00fang thu\u1eadt ng\u1eef kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t b\u00e0i t\u1eadp h\u1ecdc thu\u1eadt. N\u00f3 gi\u00fap gi\u1ea3m s\u1ef1 m\u01a1 h\u1ed3 trong t\u00e0i li\u1ec7u y\u00eau c\u1ea7u. Khi m\u1ed9t nh\u00e0 ph\u00e2n t\u00edch ch\u1ec9 r\u00f5 \u201cTh\u00e0nh ph\u1ea7n\u201d thay v\u00ec \u201cLi\u00ean k\u1ebft\u201d, nh\u00e0 ph\u00e1t tri\u1ec3n s\u1ebd hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 v\u00f2ng \u0111\u1eddi d\u1eef li\u1ec7u. S\u1ef1 ch\u00ednh x\u00e1c n\u00e0y ng\u0103n ng\u1eeba c\u00e1c l\u1ed7i li\u00ean quan \u0111\u1ebfn qu\u1ea3n l\u00fd b\u1ed9 nh\u1edb v\u00e0 t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u.<\/p>\n

                    H\u01a1n n\u1eefa, m\u1ed9t v\u1ed1n t\u1eeb v\u1ef1ng v\u1eefng ch\u1eafc th\u00fac \u0111\u1ea9y s\u1ef1 h\u1ee3p t\u00e1c. Khi c\u00e1c th\u00e0nh vi\u00ean trong nh\u00f3m chia s\u1ebb m\u1ed9t ng\u00f4n ng\u1eef chung, vi\u1ec7c ki\u1ec3m tra m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean hi\u1ec7u qu\u1ea3 h\u01a1n, v\u00e0 c\u00e1c quy\u1ebft \u0111\u1ecbnh ki\u1ebfn tr\u00fac \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn d\u1ef1a tr\u00ean s\u1ef1 th\u1eadt thay v\u00ec s\u1ef1 nh\u1ea7m l\u1eabn. \u0110i\u1ec1u n\u00e0y gi\u00fap sinh vi\u00ean m\u1edbi \u0111\u1ecdc t\u00e0i li\u1ec7u hi\u1ec7n c\u00f3 v\u00e0 hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 m\u00e0 kh\u00f4ng c\u1ea7n m\u1ed9t ng\u01b0\u1eddi h\u01b0\u1edbng d\u1eabn li\u00ean t\u1ee5c.<\/p>\n

                    \ud83d\udcdd Nh\u1eefng suy ngh\u0129 cu\u1ed1i c\u00f9ng<\/h2>\n

                    S\u1ef1 th\u00e0nh th\u1ea1o trong Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eaft \u0111\u1ea7u t\u1eeb nh\u1eefng t\u1eeb ng\u1eef d\u00f9ng \u0111\u1ec3 m\u00f4 t\u1ea3 n\u00f3. B\u1eb1ng c\u00e1ch n\u1ed9i t\u00e2m h\u00f3a c\u00e1c \u0111\u1ecbnh ngh\u0129a n\u00e0y, sinh vi\u00ean x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng h\u1ed7 tr\u1ee3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ee9c t\u1ea1p. C\u00e1c kh\u00e1i ni\u1ec7m v\u1ec1 tr\u1eebu t\u01b0\u1ee3ng h\u00f3a, \u0111\u00f3ng g\u00f3i, k\u1ebf th\u1eeba v\u00e0 \u0111a h\u00ecnh kh\u00f4ng ch\u1ec9 l\u00e0 nh\u1eefng t\u1eeb hot, m\u00e0 l\u00e0 c\u00f4ng c\u1ee5 d\u00f9ng \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m b\u1ec1n b\u1ec9, m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c. Vi\u1ec7c luy\u1ec7n t\u1eadp li\u00ean t\u1ee5c vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c thu\u1eadt ng\u1eef n\u00e0y v\u00e0o c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf s\u1ebd c\u1ee7ng c\u1ed1 hi\u1ec3u bi\u1ebft v\u00e0 chu\u1ea9n b\u1ecb cho ng\u01b0\u1eddi h\u1ecdc nh\u1eefng th\u00e1ch th\u1ee9c chuy\u00ean nghi\u1ec7p.<\/p>\n

                    H\u00e3y nh\u1edb, m\u1ee5c ti\u00eau kh\u00f4ng ph\u1ea3i l\u00e0 ghi nh\u1edb c\u00e1c \u0111\u1ecbnh ngh\u0129a m\u1ed9t c\u00e1ch t\u00e1ch bi\u1ec7t, m\u00e0 l\u00e0 hi\u1ec3u c\u00e1ch c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng th\u1ed1ng nh\u1ea5t. Khi b\u1ea1n ti\u1ebfn b\u1ed9 trong qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp, h\u00e3y quay l\u1ea1i nh\u1eefng thu\u1eadt ng\u1eef c\u1ed1t l\u00f5i n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n lu\u00f4n r\u00f5 r\u00e0ng, h\u1ee3p l\u00fd v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec.<\/p>\n","protected":false},"excerpt":{"rendered":"

                    Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ng\u00f4n ng\u1eef quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c tri\u1ec3n khai. Ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng…<\/p>\n","protected":false},"author":1,"featured_media":1915,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Thu\u1eadt ng\u1eef OOAD c\u1ed1t l\u00f5i m\u00e0 m\u1ecdi sinh vi\u00ean ph\u1ea3i bi\u1ebft \ud83c\udf93","_yoast_wpseo_metadesc":"Thu\u1eadt ng\u1eef thi\u1ebft y\u1ebfu trong Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng d\u00e0nh cho sinh vi\u00ean. 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