{"id":2033,"date":"2026-03-20T20:40:32","date_gmt":"2026-03-20T20:40:32","guid":{"rendered":"https:\/\/www.viz-note.com\/vi\/how-to-read-uml-diagrams-like-a-pro\/"},"modified":"2026-03-20T20:40:32","modified_gmt":"2026-03-20T20:40:32","slug":"how-to-read-uml-diagrams-like-a-pro","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/vi\/how-to-read-uml-diagrams-like-a-pro\/","title":{"rendered":"C\u00e1ch \u0111\u1ecdc s\u01a1 \u0111\u1ed3 UML nh\u01b0 m\u1ed9t chuy\u00ean gia"},"content":{"rendered":"
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\"Hand-drawn<\/figure>\n<\/div>\n
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\ud83d\udca1 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd<\/h2>\n
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    Ti\u00eau chu\u1ea9n h\u00f3a:<\/strong>Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t cung c\u1ea5p m\u1ed9t ng\u00f4n ng\u1eef tr\u1ef1c quan chung cho c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n.<\/p>\n<\/li>\n

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    M\u1ed1i quan h\u1ec7 l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng:<\/strong>Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c \u0111\u01b0\u1eddng v\u00e0 m\u0169i t\u00ean quan tr\u1ecdng h\u01a1n vi\u1ec7c bi\u1ebft t\u1eebng h\u00ecnh d\u1ea1ng ri\u00eang l\u1ebb.<\/p>\n<\/li>\n

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    B\u1ed1i c\u1ea3nh l\u00e0 ch\u00eca kh\u00f3a:<\/strong>Lu\u00f4n x\u00e1c \u0111\u1ecbnh lo\u1ea1i s\u01a1 \u0111\u1ed3 tr\u01b0\u1edbc khi ph\u00e2n t\u00edch chi ti\u1ebft b\u00ean trong n\u00f3.<\/p>\n<\/li>\n

  • \n

    Quy tr\u00ecnh l\u1eb7p l\u1ea1i:<\/strong>C\u00e1c s\u01a1 \u0111\u1ed3 bi\u1ec3u di\u1ec5n \u00fd \u0111\u1ecbnh thi\u1ebft k\u1ebf v\u00e0 ph\u00e1t tri\u1ec3n song song v\u1edbi vi\u1ec7c tri\u1ec3n khai m\u00e3 ngu\u1ed3n.<\/p>\n<\/li>\n<\/ul>\n<\/div>\n

    Ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o tr\u1ef1c quan h\u00f3a. Khi c\u00e1c \u0111\u1ed9i nh\u00f3m h\u1ee3p t\u00e1c tr\u00ean c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p, c\u00e1c m\u00f4 t\u1ea3 v\u0103n b\u1ea3n th\u01b0\u1eddng kh\u00f4ng th\u1ec3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c c\u00e1c m\u1ed1i quan h\u1ec7 \u0111\u1ed9ng gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n. Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML) l\u1ea5p \u0111\u1ea7y kho\u1ea3ng tr\u1ed1ng n\u00e0y. \u0110\u00f3 l\u00e0 m\u1ed9t ng\u00f4n ng\u1eef tr\u1ef1c quan chu\u1ea9n h\u00f3a \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh, x\u00e2y d\u1ef1ng v\u00e0 t\u00e0i li\u1ec7u h\u00f3a c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m. Vi\u1ec7c \u0111\u1ecdc c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 nh\u1eadn di\u1ec7n h\u00ecnh d\u1ea1ng; m\u00e0 c\u00f2n l\u00e0 hi\u1ec3u \u0111\u01b0\u1ee3c logic, lu\u1ed3ng v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p trong thi\u1ebft k\u1ebf.<\/p>\n

    D\u00f9 b\u1ea1n l\u00e0 nh\u00e0 ph\u00e1t tri\u1ec3n, nh\u00e0 qu\u1ea3n l\u00fd s\u1ea3n ph\u1ea9m hay nh\u00e0 ph\u00e2n t\u00edch h\u1ec7 th\u1ed1ng, kh\u1ea3 n\u0103ng hi\u1ec3u ch\u00ednh x\u00e1c c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y s\u1ebd gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3. N\u00f3 gi\u00fap b\u1ea1n theo d\u00f5i lu\u1ed3ng d\u1eef li\u1ec7u, ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m ngh\u1ebdn ti\u1ec1m \u1ea9n v\u00e0 hi\u1ec3u c\u1ea5u tr\u00fac k\u1ebf th\u1eeba m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ngay l\u1eadp t\u1ee9c nh\u1ea3y v\u00e0o m\u00e3 ngu\u1ed3n. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 gi\u1ea3i m\u00e3 c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y m\u1ed9t c\u00e1ch c\u00f3 th\u1ea9m quy\u1ec1n v\u00e0 ch\u00ednh x\u00e1c.<\/p>\n

    Hi\u1ec3u r\u00f5 c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng \ud83e\uddf1<\/h2>\n

    Tr\u01b0\u1edbc khi ph\u00e2n t\u00edch c\u00e1c s\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p, ta ph\u1ea3i n\u1eafm v\u1eefng k\u00fd hi\u1ec7u. UML d\u1ef1a v\u00e0o m\u1ed9t b\u1ed9 k\u00fd hi\u1ec7u nh\u1ea5t qu\u00e1n \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, quy tr\u00ecnh v\u00e0 k\u1ebft n\u1ed1i. Vi\u1ec7c hi\u1ec3u sai ki\u1ec3u \u0111\u01b0\u1eddng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec3u l\u1ea7m c\u0103n b\u1ea3n v\u1ec1 h\u00e0nh vi c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n

    Xem b\u1ea3ng sau nh\u01b0 m\u1ed9t t\u00e0i li\u1ec7u tham kh\u1ea3o cho c\u00e1c th\u00e0nh ph\u1ea7n ph\u1ed5 bi\u1ebfn nh\u1ea5t xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u lo\u1ea1i s\u01a1 \u0111\u1ed3:<\/p>\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n
    \n

    Th\u00e0nh ph\u1ea7n<\/p>\n<\/th>\n

    		\n

    Bi\u1ec3u di\u1ec5n tr\u1ef1c quan<\/p>\n<\/th>\n

    		\n

    \u00dd ngh\u0129a<\/p>\n<\/th>\n<\/tr>\n

    \n

    L\u1edbp<\/p>\n<\/td>\n

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    H\u00ecnh ch\u1eef nh\u1eadt chia th\u00e0nh ba ph\u1ea7n<\/p>\n<\/td>\n

    		\n

    M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 thu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c<\/p>\n<\/td>\n<\/tr>\n

    \n

    Ng\u01b0\u1eddi d\u00f9ng<\/p>\n<\/td>\n

    		\n

    Bi\u1ec3u t\u01b0\u1ee3ng h\u00ecnh ng\u01b0\u1eddi que<\/p>\n<\/td>\n

    		\n

    M\u1ed9t ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i t\u01b0\u01a1ng t\u00e1c v\u1edbi ph\u1ea7n m\u1ec1m<\/p>\n<\/td>\n<\/tr>\n

    \n

    \u0110\u01b0\u1eddng li\u1ec1n<\/p>\n<\/td>\n

    		\n

    \u0110\u01b0\u1eddng th\u1eb3ng n\u1ed1i c\u00e1c h\u1ed9p<\/p>\n<\/td>\n

    		\n

    Li\u00ean k\u1ebft ho\u1eb7c ph\u1ee5 thu\u1ed9c<\/p>\n<\/td>\n<\/tr>\n

    \n

    \u0110\u01b0\u1eddng g\u1ea1ch \u0111\u1ee9t<\/p>\n<\/td>\n

    		\n

    \u0110\u01b0\u1eddng ch\u1ea5m ho\u1eb7c \u0111\u01b0\u1eddng g\u1ea1ch \u0111\u1ee9t<\/p>\n<\/td>\n

    		\n

    Ph\u1ee5 thu\u1ed9c ho\u1eb7c tri\u1ec3n khai<\/p>\n<\/td>\n<\/tr>\n

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    M\u0169i t\u00ean h\u1edf<\/p>\n<\/td>\n

    		\n

    Tam gi\u00e1c ch\u1ec9 v\u00e0o m\u1ed9t h\u1ed9p<\/p>\n<\/td>\n

    		\n

    S\u1ef1 ph\u1ee5 thu\u1ed9c (A s\u1eed d\u1ee5ng B)<\/p>\n<\/td>\n<\/tr>\n

    \n

    H\u00ecnh kim c\u01b0\u01a1ng \u0111\u1ea7y<\/p>\n<\/td>\n

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    H\u00ecnh kim c\u01b0\u01a1ng \u0111en<\/p>\n<\/td>\n

    		\n

    Th\u00e0nh ph\u1ea7n (Quy\u1ec1n s\u1edf h\u1eefu m\u1ea1nh)<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    S\u01a1 \u0111\u1ed3 l\u1edbp: C\u1ed1t l\u00f5i c\u1ee7a c\u1ea5u tr\u00fac \ud83c\udfd7\ufe0f<\/h2>\n

    S\u01a1 \u0111\u1ed3 l\u1edbp l\u00e0 lo\u1ea1i s\u01a1 \u0111\u1ed3 t\u0129nh ph\u1ed5 bi\u1ebfn nh\u1ea5t. Ch\u00fang 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, thao t\u00e1c v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. Khi \u0111\u1ecdc m\u1ed9t s\u01a1 \u0111\u1ed3 l\u1edbp, h\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh.<\/p>\n

    Thu\u1ed9c t\u00ednh v\u00e0 m\u1ee9c \u0111\u1ed9 hi\u1ec3n th\u1ecb<\/h3>\n

    C\u00e1c thu\u1ed9c t\u00ednh \u0111\u1ea1i di\u1ec7n cho d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t l\u1edbp. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111i k\u00e8m b\u1edfi c\u00e1c k\u00fd hi\u1ec7u ch\u1ec9 m\u1ee9c \u0111\u1ed9 hi\u1ec3n th\u1ecb:<\/p>\n

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      +<\/strong> (D\u1ea5u c\u1ed9ng): C\u00f4ng khai. C\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o kh\u00e1c.<\/p>\n<\/li>\n

    • \n

      \u2013<\/strong> (D\u1ea5u tr\u1eeb): Ri\u00eang t\u01b0. Ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong ch\u00ednh l\u1edbp \u0111\u00f3.<\/p>\n<\/li>\n

    • \n

      #<\/strong> (D\u1ea5u th\u0103ng): B\u1ea3o v\u1ec7. C\u00f3 th\u1ec3 truy c\u1eadp b\u1edfi l\u1edbp v\u00e0 c\u00e1c l\u1edbp con c\u1ee7a n\u00f3.<\/p>\n<\/li>\n<\/ul>\n

      M\u1ed1i quan h\u1ec7 v\u00e0 b\u1ed9i s\u1ed1<\/h3>\n

      C\u00e1c \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c l\u1edbp x\u00e1c \u0111\u1ecbnh c\u00e1ch ch\u00fang t\u01b0\u01a1ng t\u00e1c. Y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t l\u00e0 b\u1ed9i s\u1ed1, th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng c\u00e1c con s\u1ed1 \u1edf g\u1ea7n hai \u0111\u1ea7u c\u1ee7a \u0111\u01b0\u1eddng n\u1ed1i.<\/p>\n

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        1<\/strong>: Ch\u00ednh x\u00e1c m\u1ed9t th\u1ec3 hi\u1ec7n.<\/p>\n<\/li>\n

      • \n

        0..1<\/strong>: Kh\u00f4ng ho\u1eb7c m\u1ed9t th\u1ec3 hi\u1ec7n.<\/p>\n<\/li>\n

      • \n

        1..*<\/strong> ho\u1eb7c *<\/strong>: M\u1ed9t ho\u1eb7c nhi\u1ec1u th\u1ec3 hi\u1ec7n.<\/p>\n<\/li>\n<\/ul>\n

        V\u00ed d\u1ee5, m\u1ed9t Kh\u00e1ch h\u00e0ng<\/code>l\u1edbp c\u00f3 th\u1ec3 c\u00f3 m\u1ed1i quan h\u1ec7 v\u1edbi m\u1ed9t \u0110\u01a1n h\u00e0ng<\/code> l\u1edbp. N\u1ebfu k\u00fd hi\u1ec7u hi\u1ec3n th\u1ecb 1<\/code> \u1edf ph\u00eda Kh\u00e1ch h\u00e0ng v\u00e0 0..*<\/strong> \u1edf ph\u00eda \u0110\u01a1n h\u00e0ng, \u0111i\u1ec1u \u0111\u00f3 ng\u1ee5 \u00fd m\u1ed9t kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 \u0111\u1eb7t nhi\u1ec1u \u0111\u01a1n h\u00e0ng, nh\u01b0ng m\u1ed7i \u0111\u01a1n h\u00e0ng ch\u1ec9 thu\u1ed9c v\u1ec1 \u0111\u00fang m\u1ed9t kh\u00e1ch h\u00e0ng. Logic n\u00e0y \u0111\u1ecbnh h\u00ecnh c\u00e1ch thi\u1ebft k\u1ebf l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 API.<\/p>\n

        K\u1ebf th\u1eeba so v\u1edbi Li\u00ean k\u1ebft<\/h3>\n

        Ph\u00e2n bi\u1ec7t gi\u1eefa k\u1ebf th\u1eeba v\u00e0 li\u00ean k\u1ebft l\u00e0 r\u1ea5t quan tr\u1ecdng. K\u1ebf th\u1eeba (T\u1ed5ng qu\u00e1t h\u00f3a) \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng li\u1ec1n v\u1edbi h\u00ecnh tam gi\u00e1c r\u1ed7ng h\u01b0\u1edbng v\u1ec1 l\u1edbp cha. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 \u201cL\u00e0-m\u1ed9t\u201d. M\u1ed9t Xe h\u01a1i<\/code> l\u00e0 m\u1ed9t<\/em> Ph\u01b0\u01a1ng ti\u1ec7n<\/code>. Li\u00ean k\u1ebft l\u00e0 m\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac, th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng \u0111\u01a1n gi\u1ea3n. M\u1ed9t L\u00e1i xe<\/code> \u0111i\u1ec1u khi\u1ec3n m\u1ed9t Xe h\u01a1i<\/code>, nh\u01b0ng m\u1ed9t l\u00e1i xe kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t lo\u1ea1i xe h\u01a1i.<\/p>\n

        S\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1: Tr\u1ef1c quan h\u00f3a th\u1eddi gian \u23f1\ufe0f<\/h2>\n

        Trong khi s\u01a1 \u0111\u1ed3 l\u1edbp th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac, s\u01a1 \u0111\u1ed3 th\u1ee9 t\u1ef1 th\u1ec3 hi\u1ec7n h\u00e0nh vi theo th\u1eddi gian. Ch\u00fang m\u00f4 t\u1ea3 c\u00e1c t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng theo m\u1ed9t th\u1ee9 t\u1ef1 c\u1ee5 th\u1ec3. Vi\u1ec7c \u0111\u1ecdc c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u00f2i h\u1ecfi c\u00e1ch ti\u1ebfp c\u1eadn t\u1eeb tr\u00ean xu\u1ed1ng, theo d\u00f5i d\u00f2ng th\u1eddi gian d\u1ecdc c\u1ee7a c\u00e1c tin nh\u1eafn.<\/p>\n

        C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh<\/h3>\n

        C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00e1c h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ee9ng \u1edf tr\u00ean c\u00f9ng, g\u1ecdi l\u00e0 c\u00e1c \u0111\u01b0\u1eddng s\u1ed1ng. C\u00e1c tin nh\u1eafn l\u00e0 c\u00e1c m\u0169i t\u00ean n\u1eb1m ngang ch\u1ec9 t\u1eeb m\u1ed9t \u0111\u01b0\u1eddng s\u1ed1ng sang \u0111\u01b0\u1eddng s\u1ed1ng kh\u00e1c. H\u01b0\u1edbng c\u1ee7a m\u0169i t\u00ean cho bi\u1ebft ng\u01b0\u1eddi g\u1eedi v\u00e0 ng\u01b0\u1eddi nh\u1eadn.<\/p>\n

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          G\u1ecdi \u0111\u1ed3ng b\u1ed9:<\/strong> \u0110\u01b0\u1eddng li\u1ec1n v\u1edbi \u0111\u1ea7u m\u0169i t\u00ean li\u1ec1n. Ng\u01b0\u1eddi g\u1eedi ch\u1edd cho ng\u01b0\u1eddi nh\u1eadn ho\u00e0n th\u00e0nh h\u00e0nh \u0111\u1ed9ng tr\u01b0\u1edbc khi ti\u1ebfp t\u1ee5c.<\/p>\n<\/li>\n

        • \n

          G\u1ecdi b\u1ea5t \u0111\u1ed3ng b\u1ed9:<\/strong> \u0110\u01b0\u1eddng li\u1ec1n v\u1edbi \u0111\u1ea7u m\u0169i t\u00ean r\u1ed7ng. Ng\u01b0\u1eddi g\u1eedi ti\u1ebfp t\u1ee5c m\u00e0 kh\u00f4ng ch\u1edd \u0111\u1ee3i.<\/p>\n<\/li>\n

        • \n

          Tin nh\u1eafn tr\u1ea3 l\u1eddi:<\/strong> \u0110\u01b0\u1eddng g\u1ea1ch \u0111\u1ee9t v\u1edbi \u0111\u1ea7u m\u0169i t\u00ean r\u1ed7ng. Ch\u1ec9 ra ph\u1ea3n h\u1ed3i t\u1eeb ng\u01b0\u1eddi nh\u1eadn.<\/p>\n<\/li>\n<\/ul>\n

          Thanh k\u00edch ho\u1ea1t<\/h3>\n

          Nh\u1eefng h\u00ecnh ch\u1eef nh\u1eadt m\u1ecfng tr\u00ean \u0111\u01b0\u1eddng s\u1ed1ng cho bi\u1ebft khi n\u00e0o m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t thao t\u00e1c. D\u1ea5u hi\u1ec7u tr\u1ef1c quan n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn. N\u1ebfu thanh k\u00edch ho\u1ea1t k\u00e9o d\u00e0i trong th\u1eddi gian d\u00e0i, \u0111i\u1ec1u \u0111\u00f3 cho th\u1ea5y m\u1ed9t t\u00e1c v\u1ee5 t\u1ed1n nhi\u1ec1u t\u00ednh to\u00e1n ho\u1eb7c m\u1ed9t thao t\u00e1c c\u00f3 th\u1ec3 b\u1ecb ch\u1eb7n.<\/p>\n

          S\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i: Theo d\u00f5i c\u00e1c \u0111i\u1ec1u ki\u1ec7n \ud83d\udd04<\/h2>\n

          S\u01a1 \u0111\u1ed3 m\u00e1y tr\u1ea1ng th\u00e1i t\u1eadp trung v\u00e0o v\u00f2ng \u0111\u1eddi c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng duy nh\u1ea5t. Ch\u00fang r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 hi\u1ec3u c\u00e1c quy tr\u00ecnh ph\u1ee9c t\u1ea1p n\u01a1i m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c tr\u1ea1ng th\u00e1i kh\u00e1c nhau d\u1ef1a tr\u00ean c\u00e1c s\u1ef1 ki\u1ec7n.<\/p>\n

          B\u1eaft \u0111\u1ea7u t\u1eeb tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u, th\u01b0\u1eddng l\u00e0 m\u1ed9t h\u00ecnh tr\u00f2n \u0111en li\u1ec1n. Theo d\u00f5i c\u00e1c m\u0169i t\u00ean \u0111\u1ebfn tr\u1ea1ng th\u00e1i ti\u1ebfp theo, \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng h\u00ecnh ch\u1eef nh\u1eadt bo tr\u00f2n. Nh\u00e3n tr\u00ean m\u0169i t\u00ean cho bi\u1ebft s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t chuy\u1ec3n tr\u1ea1ng th\u00e1i. N\u1ebfu b\u1ea1n th\u1ea5y d\u1ea5u g\u1ea1ch ch\u00e9o theo sau l\u00e0 v\u0103n b\u1ea3n (v\u00ed d\u1ee5 nh\u01b0 “\/sendNotification<\/code>), n\u00f3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t h\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i.<\/p>\n

          Hi\u1ec3u \u0111\u01b0\u1ee3c c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y gi\u00fap trong vi\u1ec7c g\u1ee1 l\u1ed7i. N\u1ebfu m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i v\u00e0o tr\u1ea1ng th\u00e1i kh\u00f4ng mong \u0111\u1ee3i, s\u01a1 \u0111\u1ed3 s\u1ebd cung c\u1ea5p con \u0111\u01b0\u1eddng mong \u0111\u1ee3i, gi\u00fap d\u1ec5 d\u00e0ng truy v\u1ebft n\u01a1i logic \u0111\u00e3 l\u1ec7ch kh\u1ecfi h\u01b0\u1edbng.<\/p>\n

          Chi\u1ebfn l\u01b0\u1ee3c v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ecdc \ud83e\udde0<\/h2>\n

          \u0110\u1ec3 \u0111\u1ecdc c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, h\u00e3y \u00e1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p h\u1ec7 th\u1ed1ng. \u0110\u1eebng c\u1ed1 g\u1eafng ti\u1ebfp thu to\u00e0n b\u1ed9 s\u01a1 \u0111\u1ed3 c\u00f9ng m\u1ed9t l\u00fac. H\u00e3y chia nh\u1ecf th\u00e0nh c\u00e1c ph\u1ea7n d\u1ec5 qu\u1ea3n l\u00fd.<\/p>\n

            \n
          1. \n

            X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi:<\/strong>X\u00e1c \u0111\u1ecbnh s\u01a1 \u0111\u1ed3 \u0111ang c\u1ed1 g\u1eafng gi\u1ea3i th\u00edch \u0111i\u1ec1u g\u00ec. \u0110\u00f3 l\u00e0 c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao hay chi ti\u1ebft tri\u1ec3n khai c\u1ee5 th\u1ec3?<\/p>\n<\/li>\n

          2. \n

            Qu\u00e9t t\u00ecm c\u00e1c t\u00e1c nh\u00e2n:<\/strong>Trong c\u00e1c s\u01a1 \u0111\u1ed3 use case, x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i t\u01b0\u01a1ng t\u00e1c v\u1edbi h\u1ec7 th\u1ed1ng. \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi c\u1ee7a thi\u1ebft k\u1ebf.<\/p>\n<\/li>\n

          3. \n

            Theo d\u00f5i lu\u1ed3ng:<\/strong>Trong c\u00e1c s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 ho\u1eb7c ho\u1ea1t \u0111\u1ed9ng, theo d\u00f5i h\u00e0nh tr\u00ecnh t\u1eeb \u0111\u1ea7u \u0111\u1ebfn cu\u1ed1i. T\u00ecm ki\u1ebfm c\u00e1c v\u00f2ng l\u1eb7p v\u00e0 c\u00e1c nh\u00e1nh \u0111\u01b0\u1eddng \u0111i.<\/p>\n<\/li>\n

          4. \n

            Ph\u00e2n t\u00edch r\u00e0ng bu\u1ed9c:<\/strong>Ki\u1ec3m tra c\u00e1c ghi ch\u00fa ho\u1eb7c r\u00e0ng bu\u1ed9c \u0111\u01b0\u1ee3c \u0111\u00ednh k\u00e8m v\u1edbi c\u00e1c m\u1ed1i quan h\u1ec7. Nh\u1eefng r\u00e0ng bu\u1ed9c n\u00e0y th\u01b0\u1eddng ch\u1ee9a c\u00e1c quy t\u1eafc kinh doanh quan tr\u1ecdng.<\/p>\n<\/li>\n<\/ol>\n

            Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh \ud83d\udeab<\/h2>\n

            Ngay c\u1ea3 nh\u1eefng chuy\u00ean gia c\u00f3 kinh nghi\u1ec7m c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3u sai s\u01a1 \u0111\u1ed3. Nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn s\u1ebd ng\u0103n ng\u1eeba nh\u1eefng hi\u1ec3u l\u1ea7m t\u1ed1n k\u00e9m.<\/p>\n

              \n
            • \n

              Nh\u1ea7m l\u1eabn gi\u1eefa Aggregation v\u00e0 Composition:<\/strong>C\u1ea3 hai \u0111\u1ec1u l\u00e0 lo\u1ea1i quan h\u1ec7 c\u00f3 h\u00ecnh kim c\u01b0\u01a1ng. Aggregation (kim c\u01b0\u01a1ng r\u1ed7ng) ng\u1ee5 \u00fd m\u1ed1i quan h\u1ec7 ‘c\u00f3-m\u1ed9t’ n\u01a1i c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp. Composition (kim c\u01b0\u01a1ng \u0111\u1ea7y) ng\u1ee5 \u00fd c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i n\u1ebfu kh\u00f4ng c\u00f3 to\u00e0n th\u1ec3. S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u1ea3n l\u00fd v\u00f2ng \u0111\u1eddi d\u1eef li\u1ec7u.<\/p>\n<\/li>\n

            • \n

              B\u1ecf qua t\u00ednh \u0111a d\u1ea1ng:<\/strong>Ch\u1ec9 t\u1eadp trung v\u00e0o h\u00ecnh d\u1ea1ng m\u00e0 b\u1ecf qua c\u00e1c con s\u1ed1 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng gi\u1ea3 \u0111\u1ecbnh sai l\u1ea7m v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7.<\/p>\n<\/li>\n

            • \n

              Qu\u00e1 t\u1ea3i s\u01a1 \u0111\u1ed3:<\/strong>M\u1ed9t s\u01a1 \u0111\u1ed3 c\u1ed1 g\u1eafng gi\u1ea3i th\u00edch m\u1ecdi th\u1ee9 th\u01b0\u1eddng v\u00f4 d\u1ee5ng. H\u00e3y t\u00ecm c\u00e1c s\u01a1 \u0111\u1ed3 ri\u00eang bi\u1ec7t cho c\u00e1c v\u1ea5n \u0111\u1ec1 kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00e1ch bi\u1ec7t logic kinh doanh kh\u1ecfi l\u01b0u tr\u1eef d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ul>\n

              K\u1ebft lu\u1eadn v\u1ec1 n\u0103ng l\u1ef1c \u0111\u1ecdc s\u01a1 \u0111\u1ed3 \ud83d\udcda<\/h2>\n

              Th\u00e0nh th\u1ea1o ng\u00f4n ng\u1eef tr\u1ef1c quan c\u1ee7a thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh li\u00ean t\u1ee5c. N\u00f3 \u0111\u00f2i h\u1ecfi luy\u1ec7n t\u1eadp v\u00e0 s\u1eb5n s\u00e0ng \u0111\u1eb7t c\u00e2u h\u1ecfi v\u1ec1 m\u1ee5c \u0111\u00edch \u0111\u1eb1ng sau m\u1ed7i \u0111\u01b0\u1eddng n\u00e9t v\u00e0 h\u00ecnh d\u1ea1ng. B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c m\u1ed1i quan h\u1ec7, r\u00e0ng bu\u1ed9c v\u00e0 lu\u1ed3ng, b\u1ea1n c\u00f3 th\u1ec3 r\u00fat ra nh\u1eefng hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc t\u1eeb c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y. Kh\u1ea3 n\u0103ng n\u00e0y n\u00e2ng cao giao ti\u1ebfp gi\u1eefa c\u00e1c \u0111\u1ed9i nh\u00f3m v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng tri\u1ec3n khai cu\u1ed1i c\u00f9ng ph\u00f9 h\u1ee3p v\u1edbi t\u1ea7m nh\u00ecn ki\u1ebfn tr\u00fac.<\/p>\n

              B\u1eaft \u0111\u1ea7u b\u1eb1ng vi\u1ec7c xem x\u00e9t m\u1ed9t v\u00e0i s\u01a1 \u0111\u1ed3 h\u00f4m nay. H\u00e3y th\u1eed li\u00ean k\u1ebft c\u00e1c y\u1ebfu t\u1ed1 tr\u1ef1c quan v\u1edbi m\u00e3 ngu\u1ed3n b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c. Theo th\u1eddi gian, c\u00e1c k\u00fd hi\u1ec7u s\u1ebd tr\u1edf n\u00ean t\u1ef1 nhi\u00ean, gi\u00fap b\u1ea1n \u0111i\u1ec1u h\u01b0\u1edbng c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p m\u1ed9t c\u00e1ch t\u1ef1 tin v\u00e0 r\u00f5 r\u00e0ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

              \ud83d\udca1 Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd Ti\u00eau chu\u1ea9n h\u00f3a:Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t cung c\u1ea5p m\u1ed9t ng\u00f4n ng\u1eef tr\u1ef1c quan chung cho c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 v\u00e0…<\/p>\n","protected":false},"author":1,"featured_media":2034,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ecdc s\u01a1 \u0111\u1ed3 UML nh\u01b0 m\u1ed9t chuy\u00ean gia (H\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf ph\u1ea7n m\u1ec1m)","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch di\u1ec5n gi\u1ea3i s\u01a1 \u0111\u1ed3 UML m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. 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