{"id":739,"date":"2026-03-27T00:40:20","date_gmt":"2026-03-27T00:40:20","guid":{"rendered":"https:\/\/www.visualize-ai.com\/vi\/5-common-mistakes-object-oriented-design\/"},"modified":"2026-03-27T00:40:20","modified_gmt":"2026-03-27T00:40:20","slug":"5-common-mistakes-object-oriented-design","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/vi\/5-common-mistakes-object-oriented-design\/","title":{"rendered":"5 L\u1ed7i Th\u00f4ng D\u1ee5ng Trong Thi\u1ebft K\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng V\u00e0 C\u00e1ch Tr\u00e1nh Ch\u00fang"},"content":{"rendered":"

Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng (OOD) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m c\u00f3 th\u1ec3 duy tr\u00ec \u0111\u01b0\u1ee3c. N\u00f3 cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a c\u00e1c th\u1ef1c th\u1ec3 trong th\u1ebf gi\u1edbi th\u1ef1c trong m\u00e3 ngu\u1ed3n, th\u00fac \u0111\u1ea9y kh\u1ea3 n\u0103ng t\u00e1i s\u1eed d\u1ee5ng v\u00e0 s\u1ef1 r\u00f5 r\u00e0ng. Tuy nhi\u00ean, \u00e1p d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc n\u00e0y m\u1ed9t c\u00e1ch sai l\u1ea7m c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c h\u1ec7 th\u1ed1ng d\u1ec5 g\u00e3y v\u1ee1, kh\u00f3 m\u1edf r\u1ed9ng ho\u1eb7c g\u1ee1 l\u1ed7i. Nhi\u1ec1u nh\u00e0 ph\u00e1t tri\u1ec3n r\u01a1i v\u00e0o nh\u1eefng c\u00e1i b\u1eaby c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c khi thi\u1ebft k\u1ebf c\u00e1c l\u1edbp v\u00e0 t\u01b0\u01a1ng t\u00e1c.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y xem x\u00e9t n\u0103m l\u1ed7i nghi\u00eam tr\u1ecdng th\u01b0\u1eddng g\u1eb7p trong c\u00e1c tri\u1ec3n khai OOD th\u00f4ng th\u01b0\u1eddng. Ch\u00fang ta s\u1ebd kh\u00e1m ph\u00e1 c\u01a1 ch\u1ebf \u0111\u1eb1ng sau nh\u1eefng sai l\u1ea7m n\u00e0y v\u00e0 cung c\u1ea5p c\u00e1c chi\u1ebfn l\u01b0\u1ee3c c\u1ee5 th\u1ec3 \u0111\u1ec3 kh\u1eafc ph\u1ee5c ch\u00fang. B\u1eb1ng c\u00e1ch hi\u1ec3u \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5, b\u1ea1n c\u00f3 th\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng b\u1ec1n v\u1eefng theo th\u1eddi gian.<\/p>\n

\n
\"Chibi-style<\/figure>\n<\/div>\n

1. L\u1ea1m d\u1ee5ng C\u00e1c C\u1ea5p \u0110\u1ed9 K\u1ebf Th\u1eeba \ud83c\udf33<\/h2>\n

M\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t trong l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 s\u1ef1 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c c\u00e2y k\u1ebf th\u1eeba s\u00e2u. M\u1eb7c d\u00f9 k\u1ebf th\u1eeba cho ph\u00e9p t\u00e1i s\u1eed d\u1ee5ng m\u00e3 th\u00f4ng qua \u0111a h\u00ecnh, nh\u01b0ng vi\u1ec7c s\u1eed d\u1ee5ng qu\u00e1 m\u1ee9c s\u1ebd t\u1ea1o ra s\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd gi\u1eefa c\u00e1c l\u1edbp cha v\u00e0 con. Khi m\u1ed9t l\u1edbp c\u01a1 s\u1edf thay \u0111\u1ed5i, m\u1ecdi l\u1edbp \u0111\u01b0\u1ee3c k\u1ebf th\u1eeba c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng m\u1ed9t c\u00e1ch b\u1ea5t ng\u1edd.<\/p>\n

V\u1ea5n \u0111\u1ec1: L\u1edbp C\u01a1 S\u1edf D\u1ec5 G\u00e3y V\u1ee1<\/h3>\n
    \n
  • C\u00e1c ph\u1ee5 thu\u1ed9c \u1ea9n:<\/strong>C\u00e1c l\u1edbp con th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c v\u00e0o chi ti\u1ebft tri\u1ec3n khai c\u1ee7a l\u1edbp cha, ch\u1ee9 kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 giao di\u1ec7n c\u1ee7a n\u00f3.<\/li>\n
  • Vi ph\u1ea1m Nguy\u00ean t\u1eafc Thay Th\u1ebf Liskov:<\/strong>M\u1ed9t l\u1edbp con c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang khi \u0111\u01b0\u1ee3c thay th\u1ebf cho l\u1edbp cha, d\u1eabn \u0111\u1ebfn l\u1ed7i th\u1eddi gian ch\u1ea1y.<\/li>\n
  • S\u1ef1 gia t\u0103ng \u0111\u1ed9 ph\u1ee9c t\u1ea1p:<\/strong>Vi\u1ec7c th\u00eam m\u1ed9t t\u00ednh n\u0103ng m\u1edbi th\u01b0\u1eddng \u0111\u00f2i h\u1ecfi ph\u1ea3i s\u1eeda \u0111\u1ed5i l\u1edbp c\u01a1 s\u1edf, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c l\u1edbp con hi\u1ec7n c\u00f3.<\/li>\n<\/ul>\n

    Gi\u1ea3i ph\u00e1p: \u01afu ti\u00ean K\u1ebft H\u1ee3p H\u01a1n K\u1ebf Th\u1eeba<\/h3>\n

    Thay v\u00ec x\u00e2y d\u1ef1ng c\u00e1c m\u1ed1i quan h\u1ec7 ‘l\u00e0-m\u1ed9t’, h\u00e3y \u01b0u ti\u00ean c\u00e1c m\u1ed1i quan h\u1ec7 ‘c\u00f3-m\u1ed9t’. K\u1ebft h\u1ee3p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1ecf, t\u1eadp trung \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1ee9c n\u0103ng. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y gi\u1ea3m s\u1ef1 g\u1eafn k\u1ebft v\u00e0 cho ph\u00e9p thay \u0111\u1ed5i h\u00e0nh vi \u0111\u1ed9ng t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y.<\/p>\n

    So s\u00e1nh C\u1ea5u Tr\u00fac M\u00e3 Ngu\u1ed3n<\/h3>\n\n\n\n\n\n\n
    C\u00e1ch ti\u1ebfp c\u1eadn<\/th>\nT\u00ednh linh ho\u1ea1t<\/th>\nT\u00ednh d\u1ec5 b\u1ea3o tr\u00ec<\/th>\nS\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<\/tr>\n<\/thead>\n
    K\u1ebf th\u1eeba s\u00e2u<\/strong><\/td>\nTh\u1ea5p<\/td>\nTh\u1ea5p<\/td>\nCh\u1ec9 d\u00e0nh cho c\u00e1c c\u1ea5p \u0111\u1ed9 to\u00e1n h\u1ecdc th\u1ef1c s\u1ef1 (v\u00ed d\u1ee5: H\u00ecnh \u2192 H\u00ecnh tr\u00f2n)<\/td>\n<\/tr>\n
    K\u1ebft h\u1ee3p<\/strong><\/td>\nCao<\/td>\nCao<\/td>\nH\u1ea7u h\u1ebft logic kinh doanh v\u00e0 tri\u1ec3n khai t\u00ednh n\u0103ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Khi thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng, h\u00e3y t\u1ef1 h\u1ecfi b\u1ea3n th\u00e2n: L\u1edbp con th\u1ef1c s\u1ef1 \u0111\u1ea1i di\u1ec7n cho l\u1edbp cha trong m\u1ecdi ng\u1eef c\u1ea3nh kh\u00f4ng? N\u1ebfu c\u00e2u tr\u1ea3 l\u1eddi l\u00e0 kh\u00f4ng, h\u00e3y c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng giao di\u1ec7n ho\u1eb7c k\u1ebft h\u1ee3p \u0111\u1ec3 li\u00ean k\u1ebft c\u00e1c h\u00e0nh vi.<\/p>\n

    2. Vi Ph\u1ea1m T\u00ednh Bao G\u1ed3m \ud83d\udeab\ud83d\udce6<\/h2>\n

    T\u00ednh bao g\u1ed3m l\u00e0 nguy\u00ean t\u1eafc che gi\u1ea5u tr\u1ea1ng th\u00e1i n\u1ed9i b\u1ed9 v\u00e0 y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u00e1c th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. Tuy nhi\u00ean, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n th\u01b0\u1eddng c\u00f4ng khai c\u00e1c tr\u01b0\u1eddng c\u00f4ng khai ho\u1eb7c cung c\u1ea5p c\u00e1c ph\u01b0\u01a1ng th\u1ee9c l\u1ea5y gi\u00e1 tr\u1ecb v\u00e0 \u0111\u1eb7t gi\u00e1 tr\u1ecb \u0111\u01a1n gi\u1ea3n m\u00e0 kh\u00f4ng c\u00f3 logic. \u0110i\u1ec1u n\u00e0y bi\u1ebfn c\u00e1c l\u1edbp th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u thay v\u00ec c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 h\u00e0nh vi.<\/p>\n

    T\u1ea1i sao tr\u1ea1ng th\u00e1i c\u00f4ng khai l\u1ea1i nguy hi\u1ec3m<\/h3>\n
      \n
    • M\u1ea5t ki\u1ec3m so\u00e1t:<\/strong>M\u00e3 b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i \u0111\u1ed1i t\u01b0\u1ee3ng th\u00e0nh tr\u1ea1ng th\u00e1i kh\u00f4ng h\u1ee3p l\u1ec7 ngay l\u1eadp t\u1ee9c.<\/li>\n
    • C\u00e1c b\u1ea5t bi\u1ebfn b\u1ecb vi ph\u1ea1m:<\/strong>C\u00e1c r\u00e0ng bu\u1ed9c n\u00ean lu\u00f4n \u0111\u00fang (v\u00ed d\u1ee5: tu\u1ed5i kh\u00f4ng th\u1ec3 \u00e2m) b\u1ecb b\u1ecf qua.<\/li>\n
    • Kh\u00f3 kh\u0103n khi t\u00e1i c\u1ea5u tr\u00fac:<\/strong>Thay \u0111\u1ed5i c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u0111\u00f2i h\u1ecfi c\u1eadp nh\u1eadt \u1edf m\u1ecdi t\u1ec7p truy c\u1eadp tr\u01b0\u1eddng \u0111\u00f3 tr\u1ef1c ti\u1ebfp.<\/li>\n<\/ul>\n

      C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho vi\u1ec7c che gi\u1ea5u d\u1eef li\u1ec7u<\/h3>\n
        \n
      1. L\u00e0m cho c\u00e1c tr\u01b0\u1eddng l\u00e0 ri\u00eang t\u01b0:<\/strong>\u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c bi\u1ebfn th\u00e0nh vi\u00ean kh\u00f4ng th\u1ec3 truy c\u1eadp t\u1eeb b\u00ean ngo\u00e0i l\u1edbp.<\/li>\n
      2. Truy c\u1eadp \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t:<\/strong>S\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u00f4ng khai \u0111\u1ec3 \u0111\u1ecdc ho\u1eb7c thay \u0111\u1ed5i d\u1eef li\u1ec7u.<\/li>\n
      3. Logic x\u00e1c th\u1ef1c:<\/strong>Ch\u00e8n logic x\u00e1c th\u1ef1c b\u00ean trong c\u00e1c ph\u01b0\u01a1ng th\u1ee9c thi\u1ebft l\u1eadp \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u.<\/li>\n
      4. T\u00ednh b\u1ea5t bi\u1ebfn:<\/strong>N\u01a1i c\u00f3 th\u1ec3, h\u00e3y l\u00e0m cho \u0111\u1ed1i t\u01b0\u1ee3ng b\u1ea5t bi\u1ebfn sau khi t\u1ea1o \u0111\u1ec3 ng\u0103n ho\u00e0n to\u00e0n vi\u1ec7c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/li>\n<\/ol>\n

        H\u00e3y xem x\u00e9t m\u1ed9t BankAccount<\/code>l\u1edbp. N\u1ebfu s\u1ed1 d\u01b0 l\u00e0 c\u00f4ng khai, b\u1ea5t k\u1ef3 m\u00e3 n\u00e0o c\u0169ng c\u00f3 th\u1ec3 \u0111\u1eb7t n\u00f3 th\u00e0nh 0 ho\u1eb7c s\u1ed1 \u00e2m. N\u1ebfu s\u1ed1 d\u01b0 l\u00e0 ri\u00eang t\u01b0, l\u1edbp c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c quy t\u1eafc nh\u01b0 ‘kh\u00f4ng \u0111\u01b0\u1ee3c r\u00fat qu\u00e1 s\u1ed1 d\u01b0’ trong ph\u01b0\u01a1ng th\u1ee9c n\u1ea1p ti\u1ec1n.<\/p>\n

        3. T\u1ea1o ra c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ea7n (l\u1edbp l\u1edbn) \ud83c\udfdb\ufe0f<\/h2>\n

        M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ea7n l\u00e0 m\u1ed9t l\u1edbp bi\u1ebft qu\u00e1 nhi\u1ec1u v\u00e0 l\u00e0m qu\u00e1 nhi\u1ec1u. Nh\u1eefng l\u1edbp n\u00e0y th\u01b0\u1eddng x\u1eed l\u00fd k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u, logic giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng, quy t\u1eafc kinh doanh v\u00e0 nh\u1eadp\/xu\u1ea5t t\u1ec7p c\u00f9ng l\u00fac. Ch\u00fang tr\u1edf th\u00e0nh nh\u1eefng t\u1ec7p kh\u1ed5ng l\u1ed3, kh\u00f3 \u0111\u1ecdc v\u00e0 \u0111\u00e1ng s\u1ee3 khi s\u1eeda \u0111\u1ed5i.<\/p>\n

        D\u1ea5u hi\u1ec7u c\u1ee7a m\u1ed9t l\u1edbp th\u1ea7n<\/h3>\n
          \n
        • S\u1ed1 d\u00f2ng m\u00e3 qu\u00e1 nhi\u1ec1u:<\/strong>L\u1edbp v\u01b0\u1ee3t qu\u00e1 500 d\u00f2ng m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 ph\u00e2n t\u00e1ch r\u00f5 r\u00e0ng.<\/li>\n
        • Nhi\u1ec1u tr\u00e1ch nhi\u1ec7m:<\/strong>N\u00f3 th\u1ef1c hi\u1ec7n c\u00e1c nhi\u1ec7m v\u1ee5 kh\u00f4ng li\u00ean quan (v\u00ed d\u1ee5: g\u1eedi email v\u00e0 t\u00ednh thu\u1ebf).<\/li>\n
        • S\u1ed1 l\u01b0\u1ee3ng ph\u1ee5 thu\u1ed9c cao:<\/strong>N\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o r\u1ea5t nhi\u1ec1u l\u1edbp kh\u00e1c.<\/li>\n<\/ul>\n

          Gi\u1ea3i quy\u1ebft b\u1eb1ng nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t<\/h3>\n

          Nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m \u0111\u01a1n nh\u1ea5t n\u00eau r\u1eb1ng m\u1ed9t l\u1edbp ch\u1ec9 n\u00ean c\u00f3 m\u1ed9t l\u00fd do \u0111\u1ec3 thay \u0111\u1ed5i. H\u00e3y chia nh\u1ecf \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ea7n th\u00e0nh c\u00e1c l\u1edbp nh\u1ecf, t\u1eadp trung h\u01a1n.<\/p>\n

          Chi\u1ebfn l\u01b0\u1ee3c t\u00e1i c\u1ea5u tr\u00fac<\/h4>\n
            \n
          1. X\u00e1c \u0111\u1ecbnh s\u1ef1 g\u1eafn k\u1ebft:<\/strong>Nh\u00f3m c\u00e1c ph\u01b0\u01a1ng th\u1ee9c ho\u1ea1t \u0111\u1ed9ng v\u1edbi nhau m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd.<\/li>\n
          2. Tr\u00edch xu\u1ea5t l\u1edbp:<\/strong>Chuy\u1ec3n c\u00e1c ph\u01b0\u01a1ng th\u1ee9c li\u00ean quan v\u00e0o c\u00e1c l\u1edbp m\u1edbi.<\/li>\n
          3. Gi\u1edbi thi\u1ec7u giao di\u1ec7n:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1c h\u1ee3p \u0111\u1ed3ng cho c\u00e1c l\u1edbp m\u1edbi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00e1ch r\u1eddi.<\/li>\n
          4. \u1ee6y quy\u1ec1n:<\/strong>L\u1edbp ban \u0111\u1ea7u n\u00ean \u1ee7y quy\u1ec1n c\u00e1c nhi\u1ec7m v\u1ee5 cho c\u00e1c l\u1edbp chuy\u00ean bi\u1ec7t m\u1edbi.<\/li>\n<\/ol>\n

            V\u00ed d\u1ee5, t\u00e1ch bi\u1ec7t m\u1ed9t ReportGenerator<\/code> l\u1edbp kh\u1ecfi m\u1ed9t DatabaseConnection<\/code> l\u1edbp. M\u00e1y t\u1ea1o b\u00e1o c\u00e1o n\u00ean y\u00eau c\u1ea7u d\u1eef li\u1ec7u, ch\u1ee9 kh\u00f4ng n\u00ean qu\u1ea3n l\u00fd k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp.<\/p>\n

            4. T\u00ednh g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd gi\u1eefa c\u00e1c module \ud83d\udd17<\/h2>\n

            T\u00ednh g\u1eafn k\u1ebft \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c l\u1eabn nhau gi\u1eefa c\u00e1c module ph\u1ea7n m\u1ec1m. G\u1eafn k\u1ebft cao c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t thay \u0111\u1ed5i trong m\u1ed9t module s\u1ebd bu\u1ed9c ph\u1ea3i thay \u0111\u1ed5i \u1edf module kh\u00e1c. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra hi\u1ec7u \u1ee9ng domino, n\u01a1i vi\u1ec7c s\u1eeda l\u1ed7i \u1edf m\u1ed9t khu v\u1ef1c l\u1ea1i l\u00e0m h\u1ecfng ch\u1ee9c n\u0103ng \u1edf khu v\u1ef1c kh\u00e1c.<\/p>\n

            C\u00e1c lo\u1ea1i g\u1eafn k\u1ebft c\u1ea7n tr\u00e1nh<\/h3>\n
              \n
            • Kh\u1edfi t\u1ea1o tr\u1ef1c ti\u1ebfp:<\/strong> S\u1eed d\u1ee5ng new<\/code> b\u00ean trong m\u1ed9t l\u1edbp \u0111\u1ec3 t\u1ea1o ra ph\u1ee5 thu\u1ed9c khi\u1ebfn vi\u1ec7c ki\u1ec3m th\u1eed tr\u1edf n\u00ean kh\u00f3 kh\u0103n v\u00e0 t\u1ea1o ra c\u00e1c li\u00ean k\u1ebft c\u1ee9ng.<\/li>\n
            • Ph\u1ee5 thu\u1ed9c c\u1ee5 th\u1ec3:<\/strong> Ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 thay v\u00ec c\u00e1c tr\u1eebu t\u01b0\u1ee3ng.<\/li>\n
            • Tr\u1ea1ng th\u00e1i to\u00e0n c\u1ee5c:<\/strong> S\u1eed d\u1ee5ng bi\u1ebfn to\u00e0n c\u1ee5c \u0111\u1ec3 chia s\u1ebb d\u1eef li\u1ec7u t\u1ea1o ra c\u00e1c ph\u1ee5 thu\u1ed9c \u1ea9n.<\/li>\n<\/ul>\n

              Chi\u1ebfn l\u01b0\u1ee3c cho g\u1eafn k\u1ebft l\u1ecfng l\u1ebbo<\/h3>\n

              G\u1eafn k\u1ebft l\u1ecfng l\u1ebbo cho ph\u00e9p c\u00e1c module ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 ki\u1ec3m th\u1eed.<\/p>\n

                \n
              • Ch\u00e8n ph\u1ee5 thu\u1ed9c:<\/strong> Truy\u1ec1n c\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t l\u1edbp th\u00f4ng qua h\u00e0m t\u1ea1o ho\u1eb7c ph\u01b0\u01a1ng th\u1ee9c thay v\u00ec t\u1ea1o ch\u00fang b\u00ean trong.<\/li>\n
              • Ph\u00e2n t\u00e1ch giao di\u1ec7n:<\/strong> Ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c giao di\u1ec7n ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a kh\u00e1ch h\u00e0ng.<\/li>\n
              • Ki\u1ebfn tr\u00fac d\u1ef1a tr\u00ean s\u1ef1 ki\u1ec7n:<\/strong> S\u1eed d\u1ee5ng s\u1ef1 ki\u1ec7n \u0111\u1ec3 th\u00f4ng b\u00e1o cho c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c v\u1ec1 c\u00e1c thay \u0111\u1ed5i m\u00e0 kh\u00f4ng c\u1ea7n g\u1ecdi tr\u1ef1c ti\u1ebfp.<\/li>\n<\/ul>\n

                B\u1eb1ng c\u00e1ch ch\u00e8n c\u00e1c ph\u1ee5 thu\u1ed9c, b\u1ea1n c\u00f3 th\u1ec3 thay th\u1ebf c\u00e1c tri\u1ec3n khai m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. V\u00ed d\u1ee5, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u gi\u1ea3 \u0111\u1ec3 ki\u1ec3m th\u1eed trong khi h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1eadt, m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i logic c\u1ed1t l\u00f5i.<\/p>\n

                5. B\u1ecf qua t\u00ednh g\u1eafn k\u1ebft \ud83e\udde9<\/h2>\n

                T\u00ednh g\u1eafn k\u1ebft \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 li\u00ean quan gi\u1eefa c\u00e1c tr\u00e1ch nhi\u1ec7m c\u1ee7a m\u1ed9t module duy nh\u1ea5t. G\u1eafn k\u1ebft th\u1ea5p c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t l\u1edbp ch\u1ee9a c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u00edt li\u00ean quan \u0111\u1ebfn nhau. \u0110i\u1ec1u n\u00e0y khi\u1ebfn l\u1edbp tr\u1edf n\u00ean kh\u00f3 hi\u1ec3u v\u00e0 kh\u00f3 t\u00e1i s\u1eed d\u1ee5ng.<\/p>\n

                M\u1ee9c \u0111\u1ed9 g\u1eafn k\u1ebft<\/h3>\n\n\n\n\n\n\n\n
                Lo\u1ea1i<\/th>\nM\u00f4 t\u1ea3<\/th>\nTr\u1ea1ng th\u00e1i<\/th>\n<\/tr>\n<\/thead>\n
                G\u1eafn k\u1ebft ng\u1eabu nhi\u00ean<\/strong><\/td>\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c nh\u00f3m m\u1ed9t c\u00e1ch t\u00f9y ti\u1ec7n.<\/td>\nK\u00e9m<\/td>\n<\/tr>\n
                G\u1eafn k\u1ebft logic<\/strong><\/td>\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u01b0\u1ee3c nh\u00f3m theo lo\u1ea1i (v\u00ed d\u1ee5: t\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u201cin\u201d).<\/td>\nCh\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c<\/td>\n<\/tr>\n
                G\u1eafn k\u1ebft ch\u1ee9c n\u0103ng<\/strong><\/td>\nC\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u00f3ng g\u00f3p v\u00e0o m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3 duy nh\u1ea5t.<\/td>\nT\u1ed1t nh\u1ea5t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                N\u00e2ng cao t\u00ednh g\u1eafn k\u1ebft<\/h3>\n

                H\u01b0\u1edbng t\u1edbi g\u1eafn k\u1ebft ch\u1ee9c n\u0103ng. M\u1ed7i ph\u01b0\u01a1ng th\u1ee9c trong m\u1ed9t l\u1edbp n\u00ean \u0111\u00f3ng g\u00f3p v\u00e0o m\u1ed9t m\u1ee5c \u0111\u00edch r\u00f5 r\u00e0ng v\u00e0 duy nh\u1ea5t.<\/p>\n

                  \n
                • Xem x\u00e9t t\u00ean ph\u01b0\u01a1ng th\u1ee9c:<\/strong> N\u1ebfu t\u00ean ph\u01b0\u01a1ng th\u1ee9c kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch c\u1ee7a l\u1edbp, h\u00e3y di chuy\u1ec3n n\u00f3.<\/li>\n
                • Chia nh\u1ecf c\u00e1c l\u1edbp l\u1edbn:<\/strong> N\u1ebfu m\u1ed9t l\u1edbp x\u1eed l\u00fd nhi\u1ec1u nhi\u1ec7m v\u1ee5 kh\u00e1c nhau, h\u00e3y chia nh\u1ecf n\u00f3.<\/li>\n
                • T\u1eadp trung v\u00e0o l\u0129nh v\u1ef1c:<\/strong> \u0110i\u1ec1u ch\u1ec9nh c\u1ea5u tr\u00fac l\u1edbp ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m l\u0129nh v\u1ef1c kinh doanh.<\/li>\n<\/ul>\n

                  T\u00ednh g\u1eafn k\u1ebft cao d\u1eabn \u0111\u1ebfn m\u00e3 ngu\u1ed3n d\u1ec5 ki\u1ec3m th\u1eed v\u00e0 g\u1ee1 l\u1ed7i h\u01a1n. N\u1ebfu x\u1ea3y ra l\u1ed7i, b\u1ea1n s\u1ebd bi\u1ebft ch\u00ednh x\u00e1c l\u1edbp n\u00e0o c\u1ea7n ki\u1ec3m tra.<\/p>\n

                  T\u00f3m t\u1eaft c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u2705<\/h2>\n

                  Tr\u00e1nh nh\u1eefng sai l\u1ea7m n\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt v\u00e0 t\u00e1i c\u1ea5u tr\u00fac li\u00ean t\u1ee5c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 danh s\u00e1ch ki\u1ec3m tra nhanh cho c\u00e1c bu\u1ed5i \u0111\u00e1nh gi\u00e1 thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n.<\/p>\n

                    \n
                  • Ki\u1ec3m tra t\u00ednh k\u1ebf th\u1eeba:<\/strong>Li\u1ec7u \u0111\u00e2y c\u00f3 ph\u1ea3i l\u00e0 m\u1ed1i quan h\u1ec7 \u201cl\u00e0-m\u1ed9t\u201d hay n\u00ean s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p thay v\u00e0o \u0111\u00f3?<\/li>\n
                  • X\u00e1c minh t\u00ednh \u0111\u00f3ng g\u00f3i:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c tr\u01b0\u1eddng d\u1eef li\u1ec7u c\u00f3 ph\u1ea3i l\u00e0 ri\u00eang t\u01b0 kh\u00f4ng?<\/li>\n
                  • Ph\u00e2n t\u00edch k\u00edch th\u01b0\u1edbc:<\/strong>L\u1edbp n\u00e0y c\u00f3 \u0111ang l\u00e0m qu\u00e1 nhi\u1ec1u vi\u1ec7c kh\u00f4ng?<\/li>\n
                  • Ki\u1ec3m tra c\u00e1c ph\u1ee5 thu\u1ed9c:<\/strong>L\u1edbp n\u00e0y c\u00f3 th\u1ec3 ch\u1ea1y m\u00e0 kh\u00f4ng c\u1ea7n c\u00e1c ph\u1ee5 thu\u1ed9c c\u1ee5 th\u1ec3 c\u1ee7a n\u00f3 kh\u00f4ng?<\/li>\n
                  • \u0110o \u0111\u1ed9 g\u1eafn k\u1ebft:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng th\u1ee9c c\u00f3 ph\u1ee5c v\u1ee5 m\u1ed9t m\u1ee5c ti\u00eau r\u00f5 r\u00e0ng kh\u00f4ng?<\/li>\n<\/ul>\n

                    Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng \ud83d\udee1\ufe0f<\/h2>\n

                    Thi\u1ebft k\u1ebf t\u1ed1t l\u00e0 v\u00f4 h\u00ecnh. Khi b\u1ea1n tri\u1ec3n khai \u0111\u00fang c\u00e1c nguy\u00ean t\u1eafc n\u00e0y, m\u00e3 ngu\u1ed3n s\u1ebd ch\u1ea3y m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean. B\u1ea1n s\u1ebd d\u00e0nh \u00edt th\u1eddi gian h\u01a1n \u0111\u1ec3 s\u1eeda l\u1ed7i v\u00e0 nhi\u1ec1u th\u1eddi gian h\u01a1n \u0111\u1ec3 t\u1ea1o gi\u00e1 tr\u1ecb. N\u1ed7 l\u1ef1c ban \u0111\u1ea7u \u0111\u1ec3 c\u1ea5u tr\u00fac c\u00e1c l\u1edbp m\u1ed9t c\u00e1ch h\u1ee3p l\u00fd s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch \u0111\u00e1ng k\u1ec3 trong giai \u0111o\u1ea1n b\u1ea3o tr\u00ec. H\u00e3y \u01b0u ti\u00ean s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 linh ho\u1ea1t thay v\u00ec c\u00e1c c\u00e1ch l\u00e0m nhanh ch\u00f3ng.<\/p>\n

                    H\u00e3y nh\u1edb r\u1eb1ng thi\u1ebft k\u1ebf l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. Xem x\u00e9t l\u1ea1i ki\u1ebfn tr\u00fac c\u1ee7a b\u1ea1n th\u01b0\u1eddng xuy\u00ean khi y\u00eau c\u1ea7u thay \u0111\u1ed5i. Lu\u00f4n c\u1ea3nh gi\u00e1c v\u1edbi nh\u1eefng d\u1ea5u hi\u1ec7u c\u1ee7a c\u00e1c sai l\u1ea7m \u0111\u01b0\u1ee3c n\u00eau \u1edf tr\u00ean. B\u1eb1ng c\u00e1ch duy tr\u00ec ti\u00eau chu\u1ea9n cao, b\u1ea1n \u0111\u1ea3m b\u1ea3o ph\u1ea7n m\u1ec1m c\u1ee7a m\u00ecnh lu\u00f4n v\u1eefng ch\u1eafc v\u00e0 linh ho\u1ea1t.<\/p>\n","protected":false},"excerpt":{"rendered":"

                    Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng (OOD) l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m c\u00f3 th\u1ec3 duy tr\u00ec \u0111\u01b0\u1ee3c. N\u00f3 cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3…<\/p>\n","protected":false},"author":1,"featured_media":740,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"5 Sai l\u1ea7m ph\u1ed5 bi\u1ebfn trong thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng & C\u00e1ch kh\u1eafc ph\u1ee5c | H\u01b0\u1edbng d\u1eabn chuy\u00ean gia","_yoast_wpseo_metadesc":"H\u1ecdc v\u1ec1 5 l\u1ed7i thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng h\u00e0ng \u0111\u1ea7u. N\u00e2ng cao c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n, kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng. 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