{"id":767,"date":"2026-03-26T12:53:05","date_gmt":"2026-03-26T12:53:05","guid":{"rendered":"https:\/\/www.visualize-ai.com\/vi\/building-reusable-components-oop-principles\/"},"modified":"2026-03-26T12:53:05","modified_gmt":"2026-03-26T12:53:05","slug":"building-reusable-components-oop-principles","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/vi\/building-reusable-components-oop-principles\/","title":{"rendered":"X\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng th\u00f4ng qua c\u00e1c nguy\u00ean t\u1eafc h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng"},"content":{"rendered":"

Trong b\u1ed1i c\u1ea3nh ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m, nhu c\u1ea7u v\u1ec1 c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 m\u1edf r\u1ed9ng l\u00e0 kh\u00f4ng ng\u1eebng. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 ki\u1ebfn tr\u00fac s\u01b0 th\u01b0\u1eddng xuy\u00ean \u0111\u1ed1i m\u1eb7t v\u1edbi th\u00e1ch th\u1ee9c vi\u1ebft m\u00e3 ngu\u1ed3n ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c ngay h\u00f4m nay v\u00e0 v\u1eabn linh ho\u1ea1t trong t\u01b0\u01a1ng lai. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac ng\u00e0nh ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD) tr\u1edf n\u00ean then ch\u1ed1t. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c l\u1eadp, c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, gi\u1ea3m thi\u1ec3u s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 n\u00e2ng cao \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

T\u00ednh t\u00e1i s\u1eed d\u1ee5ng kh\u00f4ng \u0111\u01a1n thu\u1ea7n ch\u1ec9 l\u00e0 sao ch\u00e9p v\u00e0 d\u00e1n c\u00e1c kh\u1ed1i m\u00e3 ngu\u1ed3n. \u0110\u00f3 l\u00e0 vi\u1ec7c t\u1ea1o ra c\u00e1c tr\u1eebu t\u01b0\u1ee3ng bao g\u1ed3m logic, qu\u1ea3n l\u00fd tr\u1ea1ng th\u00e1i v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c giao di\u1ec7n r\u00f5 r\u00e0ng. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1ch t\u1eadn d\u1ee5ng c\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i c\u1ee7a h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n v\u1eefng ch\u1eafc. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c kh\u00e1i ni\u1ec7m Bao \u0111\u00f3ng, K\u1ebf th\u1eeba, \u0110a h\u00ecnh v\u00e0 c\u00e1c nguy\u00ean t\u1eafc SOLID m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u1ee5 hay ng\u00f4n ng\u1eef c\u1ee5 th\u1ec3. Tr\u1ecdng t\u00e2m v\u1eabn n\u1eb1m \u1edf t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac v\u00e0 c\u00e1c m\u1eabu thi\u1ebft k\u1ebf logic th\u00fac \u0111\u1ea9y k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m hi\u1ec7u qu\u1ea3.<\/p>\n

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\"Hand-drawn<\/figure>\n<\/div>\n

Hi\u1ec3u r\u00f5 n\u1ec1n t\u1ea3ng c\u1ee7a t\u00ednh t\u00e1i s\u1eed d\u1ee5ng \ud83e\uddf1<\/h2>\n

Tr\u01b0\u1edbc khi \u0111i s\u00e2u v\u00e0o c\u00e1c c\u01a1 ch\u1ebf c\u1ee5 th\u1ec3, \u0111i\u1ec1u thi\u1ebft y\u1ebfu l\u00e0 ph\u1ea3i x\u00e1c \u0111\u1ecbnh th\u00e0nh ph\u1ea7n t\u00e1i s\u1eed d\u1ee5ng l\u00e0 g\u00ec. M\u1ed9t th\u00e0nh ph\u1ea7n l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb ch\u1ee9c n\u0103ng \u0111\u1ed9c l\u1eadp, c\u00f3 th\u1ec3 tri\u1ec3n khai ri\u00eang l\u1ebb ho\u1eb7c t\u00edch h\u1ee3p v\u00e0o m\u1ed9t h\u1ec7 th\u1ed1ng l\u1edbn h\u01a1n. \u0110\u1ec3 m\u1ed9t th\u00e0nh ph\u1ea7n th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, n\u00f3 ph\u1ea3i th\u1ec3 hi\u1ec7n c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m sau:<\/p>\n

    \n
  • \u0110\u1ed9c l\u1eadp:<\/strong>Th\u00e0nh ph\u1ea7n kh\u00f4ng n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
  • R\u00f5 r\u00e0ng:<\/strong>M\u1ee5c \u0111\u00edch v\u00e0 giao di\u1ec7n c\u1ee7a n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n kh\u00e1c hi\u1ec3u ngay l\u1eadp t\u1ee9c.<\/li>\n
  • Linh ho\u1ea1t:<\/strong>N\u00f3 n\u00ean x\u1eed l\u00fd \u0111\u01b0\u1ee3c c\u00e1c bi\u1ebfn th\u1ec3 v\u1ec1 \u0111\u1ea7u v\u00e0o v\u00e0 ng\u1eef c\u1ea3nh m\u00e0 kh\u00f4ng b\u1ecb l\u1ed7i.<\/li>\n
  • \u1ed4n \u0111\u1ecbnh:<\/strong>S\u1ef1 thay \u0111\u1ed5i b\u00ean trong th\u00e0nh ph\u1ea7n kh\u00f4ng n\u00ean bu\u1ed9c ph\u1ea3i thay \u0111\u1ed5i m\u00e3 ngu\u1ed3n s\u1eed d\u1ee5ng n\u00f3.<\/li>\n<\/ul>\n

    Ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng cung c\u1ea5p khung l\u00fd thuy\u1ebft \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y. B\u1eb1ng c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a c\u00e1c th\u1ef1c th\u1ec3 th\u1ebf gi\u1edbi th\u1ef1c ho\u1eb7c c\u00e1c kh\u00e1i ni\u1ec7m tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra b\u1ea3n v\u1ebd ph\u00e1c h\u1ecda ph\u1ea3n \u00e1nh \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1. S\u1ef1 \u00e1nh x\u1ea1 n\u00e0y cho ph\u00e9p t\u1ea1o ra c\u00e1c th\u00e0nh ph\u1ea7n l\u00e0 s\u1ef1 m\u1edf r\u1ed9ng h\u1ee3p l\u00fd c\u1ee7a y\u00eau c\u1ea7u h\u1ec7 th\u1ed1ng.<\/p>\n

    C\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i cho thi\u1ebft k\u1ebf th\u00e0nh ph\u1ea7n \ud83d\udee0\ufe0f<\/h2>\n

    \u0110\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian, c\u1ea7n \u00e1p d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf c\u1ee5 th\u1ec3. Nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y d\u1eabn d\u1eaft vi\u1ec7c t\u1ea1o ra c\u00e1c l\u1edbp v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng t\u01b0\u01a1ng t\u00e1c m\u1ed9t c\u00e1ch s\u1ea1ch s\u1ebd. C\u00e1c ph\u1ea7n sau s\u1ebd chi ti\u1ebft c\u00e1c tr\u1ee5 c\u1ed9t ch\u00ednh c\u1ee7a l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap th\u00fac \u0111\u1ea9y t\u00ednh t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n

    1. Bao \u0111\u00f3ng: B\u1ea3o v\u1ec7 tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 \ud83d\udd12<\/h3>\n

    Bao \u0111\u00f3ng l\u00e0 c\u01a1 ch\u1ebf k\u1ebft h\u1ee3p d\u1eef li\u1ec7u v\u00e0 ph\u01b0\u01a1ng th\u1ee9c l\u1ea1i v\u1edbi nhau. N\u00f3 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, ng\u0103n ng\u1eeba s\u1ef1 can thi\u1ec7p kh\u00f4ng mong mu\u1ed1n. \u0110\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec n\u00f3 \u0111\u1ea3m b\u1ea3o logic n\u1ed9i b\u1ed9 \u0111\u01b0\u1ee3c gi\u1ea5u k\u00edn kh\u1ecfi th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i.<\/p>\n

    Khi m\u1ed9t th\u00e0nh ph\u1ea7n ch\u1ec9 c\u00f4ng khai c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u1ea7n thi\u1ebft (giao di\u1ec7n c\u00f4ng khai) trong khi gi\u1eef d\u1eef li\u1ec7u ri\u00eang t\u01b0, n\u00f3 cho ph\u00e9p t\u1ed1i \u01b0u h\u00f3a n\u1ed9i b\u1ed9 m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u1ec7 th\u1ed1ng. S\u1ef1 t\u00e1ch bi\u1ec7t n\u00e0y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean h\u01b0\u1edbng t\u1edbi t\u00ednh t\u00e1i s\u1eed d\u1ee5ng. H\u00e3y xem x\u00e9t nh\u1eefng l\u1ee3i \u00edch sau:<\/p>\n

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    • Truy c\u1eadp \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t:<\/strong>Ng\u0103n c\u1ea3n m\u00e3 b\u00ean ngo\u00e0i thi\u1ebft l\u1eadp tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7.<\/li>\n
    • \u1ea8n gi\u1ea5u tri\u1ec3n khai:<\/strong>Ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u1ea7n bi\u1ebft c\u00e1ch th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh, ch\u1ec9 c\u1ea7n bi\u1ebft r\u1eb1ng n\u00f3 ho\u1ea1t \u0111\u1ed9ng.<\/li>\n
    • Hi\u1ec7u qu\u1ea3 g\u1ee1 l\u1ed7i:<\/strong>C\u00e1c v\u1ea5n \u0111\u1ec1 \u0111\u01b0\u1ee3c c\u00f4 l\u1eadp trong gi\u1edbi h\u1ea1n c\u1ee7a th\u00e0nh ph\u1ea7n.<\/li>\n<\/ul>\n

      Kh\u00f4ng c\u00f3 bao \u0111\u00f3ng, m\u1ed9t th\u00e0nh ph\u1ea7n s\u1ebd tr\u1edf n\u00ean mong manh. B\u1ea5t k\u1ef3 thay \u0111\u1ed5i n\u00e0o v\u1ec1 t\u00ean bi\u1ebfn hay logic n\u1ed9i b\u1ed9 \u0111\u1ec1u \u0111\u00f2i h\u1ecfi c\u1eadp nh\u1eadt tr\u00ean m\u1ecdi t\u1ec7p truy c\u1eadp c\u00e1c bi\u1ebfn \u0111\u00f3 tr\u1ef1c ti\u1ebfp. Bao \u0111\u00f3ng t\u1ea1o ra m\u1ed9t h\u1ee3p \u0111\u1ed3ng gi\u1eefa th\u00e0nh ph\u1ea7n v\u00e0 ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a \u1ee9ng d\u1ee5ng.<\/p>\n

      2. K\u1ebf th\u1eeba v\u00e0 T\u00edch h\u1ee3p: M\u1edf r\u1ed9ng ch\u1ee9c n\u0103ng \ud83c\udf3f<\/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 t\u00e1i s\u1eed d\u1ee5ng m\u00e3 ngu\u1ed3n b\u1eb1ng c\u00e1ch cho ph\u00e9p logic chung \u0111\u01b0\u1ee3c vi\u1ebft m\u1ed9t l\u1ea7n trong l\u1edbp c\u01a1 s\u1edf. Tuy nhi\u00ean, tri\u1ebft l\u00fd thi\u1ebft k\u1ebf hi\u1ec7n \u0111\u1ea1i th\u01b0\u1eddng \u01b0u ti\u00ean T\u00edch h\u1ee3p h\u01a1n K\u1ebf th\u1eeba \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u00ednh linh ho\u1ea1t.<\/p>\n

      K\u1ebf th\u1eeba<\/strong>t\u1ea1o ra m\u1ed1i quan h\u1ec7 “l\u00e0-m\u1ed9t”. M\u1ed9t l\u1edbpXe h\u01a1i<\/code> l\u00e0 m\u1ed9t Ph\u01b0\u01a1ng ti\u1ec7n<\/code>. \u0110i\u1ec1u n\u00e0y h\u1eefu \u00edch \u0111\u1ec3 chia s\u1ebb c\u00e1c thu\u1ed9c t\u00ednh chung nh\u01b0ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c c\u00e2y ph\u00e2n c\u1ea5p s\u00e2u m\u00e0 kh\u00f3 duy tr\u00ec.<\/p>\n

      Th\u00e0nh ph\u1ea7n<\/strong> t\u1ea1o ra m\u1ed1i quan h\u1ec7 \u201cc\u00f3-m\u1ed9t\u201d. M\u1ed9t Xe h\u01a1i<\/code> c\u00f3 m\u1ed9t \u0110\u1ed9ng c\u01a1<\/code>. B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng l\u1ea1i v\u1edbi nhau, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 thay \u0111\u1ed5i h\u00e0nh vi m\u1ed9t c\u00e1ch \u0111\u1ed9ng t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0u ti\u00ean \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng v\u00ec n\u00f3 tr\u00e1nh \u0111\u01b0\u1ee3c s\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd v\u1ed1n c\u00f3 trong c\u00e1c c\u00e2y k\u1ebf th\u1eeba s\u00e2u.<\/p>\n

      Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh bao g\u1ed3m:<\/p>\n

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      • T\u00ednh linh ho\u1ea1t:<\/strong>Th\u00e0nh ph\u1ea7n cho ph\u00e9p thay \u0111\u1ed5i h\u00e0nh vi m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i c\u1ea5u tr\u00fac l\u1edbp.<\/li>\n
      • Ki\u1ec3m th\u1eed:<\/strong>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3 l\u1eadp ho\u1eb7c gi\u1ea3 l\u1eadp d\u1ec5 d\u00e0ng h\u01a1n so v\u1edbi c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba.<\/li>\n
      • \u0110\u1ed9 ph\u1ee9c t\u1ea1p:<\/strong>Th\u00e0nh ph\u1ea7n ph\u00e2n ph\u1ed1i logic qua nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng, gi\u00fap c\u00e1c l\u1edbp ri\u00eang l\u1ebb nh\u1ecf g\u1ecdn v\u00e0 t\u1eadp trung.<\/li>\n<\/ul>\n

        3. \u0110a h\u00ecnh: Giao di\u1ec7n linh ho\u1ea1t \ud83d\udd04<\/h3>\n

        \u0110a h\u00ecnh cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng thu\u1ed9c c\u00e1c lo\u1ea1i kh\u00e1c nhau \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a m\u1ed9t ki\u1ec3u si\u00eau chung. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua ghi \u0111\u00e8 ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c tri\u1ec3n khai giao di\u1ec7n. \u0110\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, \u0111a h\u00ecnh l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 vi\u1ebft m\u00e3 t\u1ed5ng qu\u00e1t ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3.<\/p>\n

        Khi m\u1ed9t th\u00e0nh ph\u1ea7n mong \u0111\u1ee3i m\u1ed9t giao di\u1ec7n thay v\u00ec m\u1ed9t l\u1edbp c\u1ee5 th\u1ec3, n\u00f3 c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn b\u1ea5t k\u1ef3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o th\u1ecfa m\u00e3n h\u1ee3p \u0111\u1ed3ng \u0111\u00f3. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i nh\u1eefng l\u1ee3i \u00edch sau:<\/p>\n

          \n
        • Kh\u1ea3 n\u0103ng thay th\u1ebf:<\/strong>M\u1ed9t tri\u1ec3n khai c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng m\u1ed9t tri\u1ec3n khai kh\u00e1c m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i m\u00e3 ng\u01b0\u1eddi d\u00f9ng.<\/li>\n
        • Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong>C\u00e1c lo\u1ea1i m\u1edbi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o m\u00e0 kh\u00f4ng c\u1ea7n s\u1eeda \u0111\u1ed5i logic hi\u1ec7n c\u00f3.<\/li>\n
        • Tr\u1eebu t\u01b0\u1ee3ng:<\/strong>Ng\u01b0\u1eddi d\u00f9ng t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng c\u1ea5p cao, b\u1ecf qua c\u00e1c chi ti\u1ebft c\u1ea5p th\u1ea5p.<\/li>\n<\/ul>\n

          Nguy\u00ean t\u1eafc n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng khi thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea3i ph\u00e1t tri\u1ec3n. N\u00f3 \u0111\u1ea3m b\u1ea3o ki\u1ebfn tr\u00fac v\u1eabn \u1ed5n \u0111\u1ecbnh ngay c\u1ea3 khi c\u00e1c y\u00eau c\u1ea7u m\u1edbi \u0111\u01b0a v\u00e0o c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u ho\u1eb7c logic m\u1edbi.<\/p>\n

          \u00c1p d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc SOLID \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec \ud83d\udcd0<\/h2>\n

          Ch\u1eef vi\u1ebft t\u1eaft SOLID \u0111\u1ea1i di\u1ec7n cho n\u0103m nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf nh\u1eb1m gi\u00fap c\u00e1c thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u, linh ho\u1ea1t v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n. Vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng kh\u00f4ng ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t m\u00e0 c\u00f2n v\u1eefng ch\u1eafc.<\/p>\n

          Nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t (SRP)<\/h3>\n

          M\u1ed9t l\u1edbp ch\u1ec9 n\u00ean c\u00f3 m\u1ed9t l\u00fd do \u0111\u1ec3 thay \u0111\u1ed5i. N\u1ebfu m\u1ed9t th\u00e0nh ph\u1ea7n x\u1eed l\u00fd c\u1ea3 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u v\u00e0 l\u01b0u tr\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u, th\u00ec vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng s\u1ebd tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n. M\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 c\u1ea7n x\u00e1c th\u1ef1c, trong khi ph\u1ea7n kh\u00e1c c\u1ea7n l\u01b0u tr\u1eef. Vi\u1ec7c t\u00e1ch bi\u1ec7t c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u1ea3m b\u1ea3o th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ng\u1eef c\u1ea3nh kh\u00e1c nhau.<\/p>\n

          Nguy\u00ean t\u1eafc M\u1edf\/\u0110\u00f3ng (OCP)<\/h3>\n

          C\u00e1c th\u1ef1c th\u1ec3 n\u00ean \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng nh\u01b0ng \u0111\u00f3ng \u0111\u1ed1i v\u1edbi thay \u0111\u1ed5i. B\u1ea1n n\u00ean c\u00f3 th\u1ec3 th\u00eam ch\u1ee9c n\u0103ng m\u1edbi b\u1eb1ng c\u00e1ch th\u00eam m\u00e3 m\u1edbi, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1eb1ng c\u00e1ch thay \u0111\u1ed5i m\u00e3 hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c th\u00f4ng qua giao di\u1ec7n v\u00e0 l\u1edbp tr\u1eebu t\u01b0\u1ee3ng. Khi m\u1ed9t th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1edbp con ho\u1eb7c tri\u1ec3n khai m\u1edbi \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u m\u1edbi m\u00e0 kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ee7a logic ban \u0111\u1ea7u.<\/p>\n

          Nguy\u00ean t\u1eafc Thay th\u1ebf Liskov (LSP)<\/h3>\n

          C\u00e1c ki\u1ec3u con ph\u1ea3i c\u00f3 th\u1ec3 thay th\u1ebf cho ki\u1ec3u c\u01a1 s\u1edf c\u1ee7a ch\u00fang. N\u1ebfu m\u1ed9t th\u00e0nh ph\u1ea7n mong \u0111\u1ee3i m\u1ed9t ki\u1ec3u c\u01a1 s\u1edf, b\u1ea5t k\u1ef3 ki\u1ec3u con n\u00e0o \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec1u ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i h\u00e0nh vi mong \u0111\u1ee3i. Vi ph\u1ea1m \u0111i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn l\u1ed7i th\u1eddi gian ch\u1ea1y khi m\u1ed9t tri\u1ec3n khai c\u1ee5 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u1ea5t ng\u1edd. Nguy\u00ean t\u1eafc n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng logic k\u1ebf th\u1eeba kh\u00f4ng t\u1ea1o ra hi\u1ec7u \u1ee9ng ph\u1ee5.<\/p>\n

          Nguy\u00ean t\u1eafc T\u00e1ch bi\u1ec7t Giao di\u1ec7n (ISP)<\/h3>\n

          Kh\u00e1ch h\u00e0ng kh\u00f4ng n\u00ean b\u1ecb \u00e9p ph\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u00e0 h\u1ecd kh\u00f4ng s\u1eed d\u1ee5ng. C\u00e1c giao di\u1ec7n l\u1edbn, \u0111\u01a1n th\u1ec3 kh\u00f3 t\u00e1i s\u1eed d\u1ee5ng v\u00ec ch\u00fang mang theo nh\u1eefng th\u1ee9 kh\u00f4ng c\u1ea7n thi\u1ebft. B\u1eb1ng c\u00e1ch t\u1ea1o ra c\u00e1c giao di\u1ec7n nh\u1ecf v\u00e0 c\u1ee5 th\u1ec3, c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ec9 c\u1ea7n tri\u1ec3n khai c\u00e1c ph\u01b0\u01a1ng th\u1ee9c m\u00e0 ch\u00fang th\u1ef1c s\u1ef1 c\u1ea7n. \u0110i\u1ec1u n\u00e0y gi\u1ea3m s\u1ef1 ph\u1ee5 thu\u1ed9c l\u1eabn nhau v\u00e0 gi\u00fap giao di\u1ec7n d\u1ec5 hi\u1ec3u h\u01a1n.<\/p>\n

          Nguy\u00ean t\u1eafc \u0110\u1ea3o ng\u01b0\u1ee3c Ph\u1ee5 thu\u1ed9c (DIP)<\/h3>\n

          C\u00e1c module c\u1ea5p cao kh\u00f4ng n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c module c\u1ea5p th\u1ea5p. C\u1ea3 hai \u0111\u1ec1u n\u00ean ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1eebu t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y t\u00e1ch r\u1eddi th\u00e0nh ph\u1ea7n kh\u1ecfi c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3. B\u1eb1ng c\u00e1ch ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t giao di\u1ec7n, m\u1ed9t th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi b\u1ea5t k\u1ef3 tri\u1ec3n khai n\u00e0o th\u1ecfa m\u00e3n h\u1ee3p \u0111\u1ed3ng. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng cho ki\u1ec3m th\u1eed v\u00e0 t\u00edch h\u1ee3p c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

          Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang \u26a0\ufe0f<\/h2>\n

          Ngay c\u1ea3 khi hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean t\u1eafc, sai l\u1ea7m v\u1eabn x\u1ea3y ra trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf. Nh\u1eadn di\u1ec7n nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y gi\u00fap t\u1ea1o ra c\u00e1c th\u00e0nh ph\u1ea7n t\u00e1i s\u1eed d\u1ee5ng t\u1ed1t h\u01a1n.<\/p>\n

            \n
          • Thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c:<\/strong>Thi\u1ebft k\u1ebf m\u1ed9t th\u00e0nh ph\u1ea7n \u0111\u1ec3 x\u1eed l\u00fd m\u1ecdi t\u00ecnh hu\u1ed1ng c\u00f3 th\u1ec3 x\u1ea3y ra tr\u01b0\u1edbc khi c\u1ea7n thi\u1ebft s\u1ebd t\u1ea1o ra s\u1ef1 ph\u1ee9c t\u1ea1p kh\u00f4ng c\u1ea7n thi\u1ebft. H\u00e3y x\u00e2y d\u1ef1ng theo y\u00eau c\u1ea7u hi\u1ec7n t\u1ea1i v\u00e0 ch\u1ec9 th\u00eam t\u00ednh linh ho\u1ea1t khi c\u00e1c m\u1eabu h\u00ecnh th\u00e0nh.<\/li>\n
          • C\u00e1c ph\u1ee5 thu\u1ed9c \u1ea9n:<\/strong>N\u1ebfu m\u1ed9t th\u00e0nh ph\u1ea7n ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ea1ng th\u00e1i to\u00e0n c\u1ee5c ho\u1eb7c bi\u1ebfn t\u0129nh, n\u00f3 s\u1ebd tr\u1edf n\u00ean kh\u00f3 ki\u1ec3m th\u1eed v\u00e0 t\u00e1i s\u1eed d\u1ee5ng. H\u00e3y truy\u1ec1n c\u00e1c ph\u1ee5 thu\u1ed9c m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng nh\u01b0 tham s\u1ed1.<\/li>\n
          • R\u00f2 r\u1ec9 tr\u1eebu t\u01b0\u1ee3ng:<\/strong>B\u1ed9c l\u1ed9 chi ti\u1ebft tri\u1ec3n khai n\u1ed9i b\u1ed9 trong giao di\u1ec7n c\u00f4ng khai ph\u00e1 v\u1ee1 t\u00ednh \u0111\u00f3ng g\u00f3i. H\u00e3y gi\u1eef c\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u n\u1ed9i b\u1ed9 \u1edf tr\u1ea1ng th\u00e1i ri\u00eang t\u01b0.<\/li>\n
          • Vi ph\u1ea1m nguy\u00ean t\u1eafc SRP:<\/strong>T\u1ea1o ra m\u1ed9t l\u1edbp ‘Th\u1ea7n’ l\u00e0m m\u1ecdi th\u1ee9. Chia nh\u1ecf tr\u00e1ch nhi\u1ec7m th\u00e0nh c\u00e1c l\u1edbp nh\u1ecf v\u00e0 t\u1eadp trung h\u01a1n.<\/li>\n
          • S\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd:<\/strong>D\u1ef1a v\u00e0o c\u00e1c l\u1edbp c\u1ee5 th\u1ec3 thay v\u00ec giao di\u1ec7n. Lu\u00f4n l\u1eadp tr\u00ecnh theo m\u1ed9t tr\u1eebu t\u01b0\u1ee3ng.<\/li>\n<\/ul>\n

            \u0110\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n \u0111\u1ec3 t\u00e1i s\u1eed d\u1ee5ng \u2705<\/h2>\n

            Tr\u01b0\u1edbc khi tuy\u00ean b\u1ed1 m\u1ed9t th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, n\u00f3 ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh xem x\u00e9t. \u0110\u00e1nh gi\u00e1 n\u00e0y \u0111\u1ea3m b\u1ea3o th\u00e0nh ph\u1ea7n \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u00edch h\u1ee3p v\u00e0o c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau. Danh s\u00e1ch ki\u1ec3m tra sau c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1:<\/p>\n\n\n\n\n\n\n\n\n\n\n
            Ti\u00eau ch\u00ed<\/th>\nC\u00e2u h\u1ecfi<\/th>\nT\u00e1c \u0111\u1ed9ng<\/th>\n<\/tr>\n<\/thead>\n
            T\u00ednh \u0111\u00f3ng g\u00f3i<\/strong><\/td>\nTr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 c\u00f3 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u00f4ng?<\/td>\nCao<\/td>\n<\/tr>\n
            \u0110\u1ed9 r\u00f5 r\u00e0ng c\u1ee7a giao di\u1ec7n<\/strong><\/td>\nT\u00ean ph\u01b0\u01a1ng th\u1ee9c c\u00f3 m\u00f4 t\u1ea3 r\u00f5 r\u00e0ng kh\u00f4ng?<\/td>\nCao<\/td>\n<\/tr>\n
            Kh\u1ea3 n\u0103ng ki\u1ec3m th\u1eed<\/strong><\/td>\nN\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ki\u1ec3m th\u1eed \u0111\u01a1n v\u1ecb m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp kh\u00f4ng?<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
            Kh\u1ea3 n\u0103ng c\u1ea5u h\u00ecnh<\/strong><\/td>\nN\u00f3 c\u00f3 y\u00eau c\u1ea7u c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ghi c\u1ee9ng kh\u00f4ng?<\/td>\nCao<\/td>\n<\/tr>\n
            T\u00e0i li\u1ec7u<\/strong><\/td>\nVi\u1ec7c s\u1eed d\u1ee5ng c\u00f3 \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a kh\u00f4ng?<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
            X\u1eed l\u00fd l\u1ed7i<\/strong><\/td>\nN\u00f3 c\u00f3 x\u1eed l\u00fd c\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean m\u1ed9t c\u00e1ch tr\u01a1n tru kh\u00f4ng?<\/td>\nCao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            C\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ea1t \u0111i\u1ec3m cao tr\u00ean danh s\u00e1ch ki\u1ec3m tra n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00f3m kh\u00e1c \u00e1p d\u1ee5ng cao h\u01a1n. Ch\u00fang gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n khi t\u00edch h\u1ee3p ch\u00fang.<\/p>\n

            Chi\u1ebfn l\u01b0\u1ee3c t\u00edch h\u1ee3p cho vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng th\u00e0nh ph\u1ea7n \ud83d\udd04<\/h2>\n

            Sau khi c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf, th\u00e1ch th\u1ee9c ti\u1ebfp theo l\u00e0 t\u00edch h\u1ee3p ch\u00fang v\u00e0o h\u1ec7 th\u1ed1ng r\u1ed9ng l\u1edbn h\u01a1n. T\u00ednh kh\u1ea3 thi t\u00e1i s\u1eed d\u1ee5ng kh\u00f4ng ph\u1ea3i l\u00e0 n\u1ed7 l\u1ef1c m\u1ed9t l\u1ea7n; n\u00f3 \u0111\u00f2i h\u1ecfi chi\u1ebfn l\u01b0\u1ee3c ph\u00e2n ph\u1ed1i v\u00e0 qu\u1ea3n l\u00fd phi\u00ean b\u1ea3n.<\/p>\n

              \n
            • Ki\u1ebfn tr\u00fac module:<\/strong>C\u1ea5u tr\u00fac h\u1ec7 th\u1ed1ng sao cho c\u00e1c th\u00e0nh ph\u1ea7n l\u00e0 nh\u1eefng module ri\u00eang bi\u1ec7t. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ch\u00fang \u0111\u01b0\u1ee3c t\u1ea3i ho\u1eb7c g\u1ee1 b\u1ecf \u0111\u1ed9c l\u1eadp.<\/li>\n
            • Qu\u1ea3n l\u00fd phi\u00ean b\u1ea3n:<\/strong> Khi m\u1ed9t th\u00e0nh ph\u1ea7n thay \u0111\u1ed5i, \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch ng\u01b0\u1ee3c. N\u1ebfu giao di\u1ec7n thay \u0111\u1ed5i, h\u00e3y t\u1ea1o phi\u00ean b\u1ea3n m\u1edbi thay v\u00ec l\u00e0m h\u1ecfng ng\u01b0\u1eddi d\u00f9ng hi\u1ec7n t\u1ea1i.<\/li>\n
            • Ti\u00eau chu\u1ea9n t\u00e0i li\u1ec7u:<\/strong> Cung c\u1ea5p c\u00e1c v\u00ed d\u1ee5 r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch s\u1eed d\u1ee5ng th\u00e0nh ph\u1ea7n. C\u00e1c ch\u00fa th\u00edch m\u00e3 ngu\u1ed3n l\u00e0 ch\u01b0a \u0111\u1ee7; t\u00e0i li\u1ec7u b\u00ean ngo\u00e0i l\u00e0 c\u1ea7n thi\u1ebft cho c\u00e1c logic ph\u1ee9c t\u1ea1p.<\/li>\n
            • V\u00f2ng ph\u1ea3n h\u1ed3i:<\/strong> Khuy\u1ebfn kh\u00edch c\u00e1c nh\u00f3m b\u00e1o c\u00e1o s\u1ef1 c\u1ed1 ho\u1eb7c \u0111\u1ec1 xu\u1ea5t c\u1ea3i ti\u1ebfn. T\u00ednh kh\u1ea3 thi t\u00e1i s\u1eed d\u1ee5ng s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n khi th\u00e0nh ph\u1ea7n ph\u00e1t tri\u1ec3n d\u1ef1a tr\u00ean vi\u1ec7c s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf.<\/li>\n<\/ul>\n

              Vai tr\u00f2 c\u1ee7a ki\u1ec3m th\u1eed trong kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng \ud83e\uddea<\/h2>\n

              M\u1ed9t th\u00e0nh ph\u1ea7n kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c tin t\u01b0\u1edfng n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m th\u1eed k\u1ef9 l\u01b0\u1ee1ng. Ki\u1ec3m th\u1eed \u0111\u1ea3m b\u1ea3o r\u1eb1ng th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 mong \u0111\u1ee3i trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng kh\u00e1c nhau. \u0110\u1ed1i v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng, ki\u1ec3m th\u1eed c\u00f2n quan tr\u1ecdng h\u01a1n v\u00ec th\u00e0nh ph\u1ea7n s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed1i c\u1ea3nh m\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n ban \u0111\u1ea7u c\u00f3 th\u1ec3 kh\u00f4ng l\u01b0\u1eddng tr\u01b0\u1edbc.<\/p>\n

              Ki\u1ec3m th\u1eed \u0111\u01a1n v\u1ecb:<\/strong> X\u00e1c minh c\u00e1c ph\u01b0\u01a1ng th\u1ee9c v\u00e0 lu\u1ed3ng logic ri\u00eang l\u1ebb. Nh\u1eefng ki\u1ec3m th\u1eed n\u00e0y ch\u1ea1y nhanh v\u00e0 cung c\u1ea5p ph\u1ea3n h\u1ed3i t\u1ee9c th\u00ec v\u1ec1 c\u00e1c thay \u0111\u1ed5i.<\/p>\n

              Ki\u1ec3m th\u1eed t\u00edch h\u1ee3p:<\/strong> X\u00e1c minh r\u1eb1ng th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang khi \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch giao di\u1ec7n v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ee5 thu\u1ed9c.<\/p>\n

              Ki\u1ec3m th\u1eed h\u1ed3i quy:<\/strong> \u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c thay \u0111\u1ed5i m\u1edbi kh\u00f4ng l\u00e0m h\u1ecfng ch\u1ee9c n\u0103ng hi\u1ec7n c\u00f3. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec ni\u1ec1m tin v\u00e0o th\u00e0nh ph\u1ea7n theo th\u1eddi gian.<\/p>\n

              K\u1ebft lu\u1eadn v\u1ec1 k\u1ef7 lu\u1eadt thi\u1ebft k\u1ebf \ud83d\udcdd<\/h2>\n

              X\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng l\u00e0 m\u1ed9t k\u1ef7 lu\u1eadt \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n. B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o Bao \u0111\u00f3ng, K\u1ebf th\u1eeba v\u00e0 \u0110a h\u00ecnh trong b\u1ed1i c\u1ea3nh Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 m\u1edf r\u1ed9ng h\u01a1n. C\u00e1c nguy\u00ean t\u1eafc SOLID cung c\u1ea5p danh s\u00e1ch ki\u1ec3m tra \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 ngu\u1ed3n lu\u00f4n s\u1ea1ch s\u1ebd v\u00e0 linh ho\u1ea1t.<\/p>\n

              T\u00ednh t\u00e1i s\u1eed d\u1ee5ng kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ti\u1ebft ki\u1ec7m d\u00f2ng m\u00e3 h\u00f4m nay; m\u00e0 l\u00e0 ti\u1ebft ki\u1ec7m th\u1eddi gian ph\u00e1t tri\u1ec3n cho ng\u00e0y mai. N\u00f3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng xu\u1ea5t hi\u1ec7n l\u1ed7i, \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh l\u00e0m quen v\u1edbi h\u1ec7 th\u1ed1ng \u0111\u1ed1i v\u1edbi th\u00e0nh vi\u00ean m\u1edbi, \u0111\u1ed3ng th\u1eddi cho ph\u00e9p ki\u1ebfn tr\u00fac ph\u00e1t tri\u1ec3n m\u00e0 kh\u00f4ng b\u1ecb s\u1ee5p \u0111\u1ed5 v\u1ec1 m\u1eb7t c\u1ea5u tr\u00fac. B\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y v\u00e0 tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn, c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng c\u00e1c th\u00e0nh ph\u1ea7n h\u1ed7 tr\u1ee3 s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i.<\/p>\n

              H\u00e0nh tr\u00ecnh h\u01b0\u1edbng t\u1edbi ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m t\u1ed1t h\u01a1n l\u00e0 li\u00ean t\u1ee5c. M\u1ed7i d\u1ef1 \u00e1n \u0111\u1ec1u mang l\u1ea1i c\u01a1 h\u1ed9i \u0111\u1ec3 tinh ch\u1ec9nh c\u00e1c m\u1eabu thi\u1ebft k\u1ebf v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng th\u00e0nh ph\u1ea7n. V\u1edbi s\u1ef1 t\u1eadp trung v\u00e0o c\u00e1c giao di\u1ec7n r\u00f5 r\u00e0ng v\u00e0 tr\u1eebu t\u01b0\u1ee3ng m\u1ea1nh m\u1ebd, h\u1ec7 th\u1ed1ng k\u1ebft qu\u1ea3 s\u1ebd ph\u1ee5c v\u1ee5 t\u1ed5 ch\u1ee9c m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong nhi\u1ec1u n\u0103m t\u1edbi.<\/p>\n","protected":false},"excerpt":{"rendered":"

              Trong b\u1ed1i c\u1ea3nh ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m, nhu c\u1ea7u v\u1ec1 c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ea3o tr\u00ec v\u00e0 m\u1edf r\u1ed9ng l\u00e0 kh\u00f4ng ng\u1eebng. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 ki\u1ebfn tr\u00fac s\u01b0…<\/p>\n","protected":false},"author":1,"featured_media":768,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"X\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng th\u00f4ng qua c\u00e1c nguy\u00ean t\u1eafc h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfd7\ufe0f","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Kh\u00e1m ph\u00e1 c\u00e1c nguy\u00ean t\u1eafc SOLID, bao \u0111\u00f3ng v\u00e0 \u0111a h\u00ecnh \u0111\u1ec3 c\u00f3 ki\u1ebfn tr\u00fac t\u1ed1t h\u01a1n.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[44],"tags":[40,43],"class_list":["post-767","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-object-oriented-analysis-and-design","tag-academic","tag-object-oriented-analysis-and-design"],"yoast_head":"\nX\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng th\u00f4ng qua c\u00e1c nguy\u00ean t\u1eafc h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfd7\ufe0f<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch x\u00e2y d\u1ef1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. 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