{"id":1525,"date":"2026-03-29T02:57:23","date_gmt":"2026-03-29T02:57:23","guid":{"rendered":"https:\/\/www.viz-read.com\/vi\/how-object-diagrams-help-software-engineers\/"},"modified":"2026-03-29T02:57:23","modified_gmt":"2026-03-29T02:57:23","slug":"how-object-diagrams-help-software-engineers","status":"publish","type":"post","link":"https:\/\/www.viz-read.com\/vi\/how-object-diagrams-help-software-engineers\/","title":{"rendered":"C\u00e1ch s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap b\u1ea1n t\u01b0 duy nh\u01b0 m\u1ed9t k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m"},"content":{"rendered":"

K\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 vi\u1ebft m\u00e3; v\u1ec1 b\u1ea3n ch\u1ea5t, n\u00f3 l\u00e0 vi\u1ec7c c\u1ea5u tr\u00fac t\u01b0 duy. Khi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u01b0\u1ee3t qua ng\u1eef ph\u00e1p v\u00e0 \u0111i v\u00e0o ki\u1ebfn tr\u00fac c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng, h\u1ecd c\u1ea7n nh\u1eefng c\u00f4ng c\u1ee5 th\u1ec3 hi\u1ec7n th\u1ef1c t\u1ebf, ch\u1ee9 kh\u00f4ng ch\u1ec9 ti\u1ec1m n\u0103ng. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00fac s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 thi\u1ebfu. Kh\u00e1c v\u1edbi b\u1ea3n v\u1ebd s\u01a1 \u0111\u1ed3 l\u1edbp, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng ghi l\u1ea1i m\u1ed9t kho\u1ea3nh kh\u1eafc c\u1ee5 th\u1ec3 trong th\u1eddi gian \u2013 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ee5p tr\u1ea1ng th\u00e1i \u0111ang ch\u1ea1y c\u1ee7a h\u1ec7 th\u1ed1ng. \ud83d\udcf8<\/p>\n

B\u1eb1ng c\u00e1ch tr\u1ef1c quan h\u00f3a c\u00e1c th\u1ec3 hi\u1ec7n, thu\u1ed9c t\u00ednh v\u00e0 m\u1ed1i quan h\u1ec7 t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3 trong qu\u00e1 tr\u00ecnh th\u1ef1c thi, c\u00e1c k\u1ef9 s\u01b0 s\u1ebd hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap tinh ch\u1ec9nh k\u1ef9 n\u0103ng gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1, c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 \u0111\u1ed3ng b\u1ed9 m\u00f4 h\u00ecnh t\u01b0 duy c\u1ee7a b\u1ea1n v\u1edbi tr\u1ea1ng th\u00e1i th\u1ef1c t\u1ebf t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y \u1ee9ng d\u1ee5ng.<\/p>\n

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

Hi\u1ec3u v\u1ec1 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \ud83c\udfd7\ufe0f<\/h2>\n

S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t c\u00e1i nh\u00ecn t\u0129nh c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. Trong Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML), n\u00f3 b\u1ed5 sung cho s\u01a1 \u0111\u1ed3 l\u1edbp. Trong khi s\u01a1 \u0111\u1ed3 l\u1edbp \u0111\u1ecbnh ngh\u0129alo\u1ea1i<\/em>c\u00e1c th\u1ee9 t\u1ed3n t\u1ea1i (c\u00e1c quy t\u1eafc), th\u00ec s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ecbnh ngh\u0129ath\u1ec3 hi\u1ec7n<\/em>c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a nh\u1eefng th\u1ee9 \u0111\u00f3 (d\u1eef li\u1ec7u th\u1ef1c t\u1ebf).<\/p>\n

L\u1edbp so v\u1edbi \u0110\u1ed1i t\u01b0\u1ee3ng: S\u1ef1 kh\u00e1c bi\u1ec7t<\/h3>\n

S\u1ef1 nh\u1ea7m l\u1eabn th\u01b0\u1eddng x\u1ea3y ra gi\u1eefa hai ph\u01b0\u01a1ng ph\u00e1p m\u00f4 h\u00ecnh h\u00f3a n\u00e0y. \u0110\u1ec3 t\u01b0 duy nh\u01b0 m\u1ed9t k\u1ef9 s\u01b0, ta c\u1ea7n ph\u00e2n bi\u1ec7t r\u00f5 gi\u1eefa \u0111\u1ecbnh ngh\u0129a v\u00e0 th\u1ec3 hi\u1ec7n.<\/p>\n

    \n
  • S\u01a1 \u0111\u1ed3 l\u1edbp:<\/strong>Bi\u1ec3u di\u1ec5n c\u1ea5u tr\u00fac t\u0129nh. N\u00f3 th\u1ec3 hi\u1ec7n c\u00e1c l\u1edbp, thu\u1ed9c t\u00ednh, thao t\u00e1c v\u00e0 m\u1ed1i quan h\u1ec7 (k\u1ebf th\u1eeba, li\u00ean k\u1ebft). \u0110\u00f3 l\u00e0 m\u1eabu.<\/li>\n
  • S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong>Bi\u1ec3u di\u1ec5n tr\u1ea1ng th\u00e1i \u0111\u1ed9ng. N\u00f3 th\u1ec3 hi\u1ec7n c\u00e1c th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng, c\u00e1c gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh c\u1ee5 th\u1ec3 v\u00e0 c\u00e1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c th\u1ec3 hi\u1ec7n. \u0110\u00f3 l\u00e0 b\u1ee9c \u1ea3nh ch\u1ee5p.<\/li>\n<\/ul>\n\n\n\n\n\n\n\n\n\n
    T\u00ednh n\u0103ng<\/th>\nS\u01a1 \u0111\u1ed3 l\u1edbp<\/th>\nS\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n
    Tr\u1ecdng t\u00e2m<\/td>\nC\u1ea5u tr\u00fac tr\u1eebu t\u01b0\u1ee3ng<\/td>\nTh\u1ec3 hi\u1ec7n c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n
    Th\u1eddi gian<\/td>\nB\u1ec1n v\u1eefng (Giai \u0111o\u1ea1n thi\u1ebft k\u1ebf)<\/td>\nT\u1ea1m th\u1eddi (Tr\u1ea1ng th\u00e1i ch\u1ea1y)<\/td>\n<\/tr>\n
    Thu\u1ed9c t\u00ednh<\/td>\nKi\u1ec3u d\u1eef li\u1ec7u (v\u00ed d\u1ee5: int, String)<\/td>\nGi\u00e1 tr\u1ecb c\u1ee5 th\u1ec3 (v\u00ed d\u1ee5: 10, \u201c\u0110ang ho\u1ea1t \u0111\u1ed9ng\u201d)<\/td>\n<\/tr>\n
    Li\u00ean k\u1ebft<\/td>\nM\u1ed1i quan h\u1ec7 (v\u00ed d\u1ee5: 1..*<\/td>\nK\u1ebft n\u1ed1i th\u1ef1c t\u1ebf<\/td>\n<\/tr>\n
    S\u1eed d\u1ee5ng<\/td>\nKi\u1ebfn tr\u00fac, Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/td>\nG\u1ee1 l\u1ed7i, T\u00e0i li\u1ec7u, Ki\u1ec3m th\u1eed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Nh\u1eadn ra s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 \u00e1p d\u1ee5ng t\u01b0 duy k\u1ef9 thu\u1eadt nghi\u00eam ng\u1eb7t. B\u1ea1n ng\u1eebng suy ngh\u0129 v\u1ec1 \u0111i\u1ec1u g\u00ecc\u00f3 th\u1ec3<\/em>x\u1ea3y ra v\u00e0 b\u1eaft \u0111\u1ea7u ph\u00e2n t\u00edch \u0111i\u1ec1u g\u00ec\u0111ang<\/em>x\u1ea3y ra.<\/p>\n

    S\u1ef1 chuy\u1ec3n \u0111\u1ed5i nh\u1eadn th\u1ee9c: T\u1eeb tr\u1eebu t\u01b0\u1ee3ng sang c\u1ee5 th\u1ec3 \ud83d\udd04<\/h2>\n

    L\u1eadp tr\u00ecnh \u0111\u00f2i h\u1ecfi m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao. B\u1ea1n vi\u1ebft c\u00e1c ph\u01b0\u01a1ng th\u1ee9c x\u1eed l\u00fd \u0111\u1ea7u v\u00e0o chung chung. Tuy nhi\u00ean, c\u00e1c l\u1ed7i v\u00e0 v\u1ea5n \u0111\u1ec1 hi\u1ec7u su\u1ea5t th\u01b0\u1eddng n\u1eb1m \u1edf chi ti\u1ebft c\u1ee5 th\u1ec3. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng bu\u1ed9c b\u1ea1n ph\u1ea3i \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho t\u01b0 duy c\u1ee7a m\u00ecnh.<\/p>\n

    1. Tr\u1ef1c quan h\u00f3a tr\u1ea1ng th\u00e1i th\u1eddi gian ch\u1ea1y<\/h3>\n

    Khi m\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c thi, b\u1ed9 nh\u1edb \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e1t v\u00e0 c\u00e1c tham chi\u1ebfu \u0111\u01b0\u1ee3c t\u1ea1o ra. Vi\u1ec7c theo d\u00f5i \u0111i\u1ec1u n\u00e0y trong t\u00e2m tr\u00ed l\u00e0 kh\u00f3 kh\u0103n. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng h\u00f3a ra tr\u1ea1ng th\u00e1i b\u1ed9 nh\u1edb n\u00e0y.<\/p>\n

      \n
    • Ph\u00e2n b\u1ed5 b\u1ed9 nh\u1edb:<\/strong>B\u1ea1n th\u1ea5y ch\u00ednh x\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o \u0111ang chi\u1ebfm d\u1ee5ng kh\u00f4ng gian.<\/li>\n
    • Theo d\u00f5i tham chi\u1ebfu:<\/strong>B\u1ea1n tr\u1ef1c quan h\u00f3a c\u00e1ch \u0111\u1ed1i t\u01b0\u1ee3ng A tr\u1ecf \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng B.<\/li>\n
    • Tr\u1ea1ng th\u00e1i null:<\/strong>B\u1ea1n x\u00e1c \u0111\u1ecbnh n\u01a1i n\u00e0o tham chi\u1ebfu b\u1ecb thi\u1ebfu, t\u1eeb \u0111\u00f3 ng\u0103n ch\u1eb7n c\u00e1c ngo\u1ea1i l\u1ec7 tr\u1ecf null.<\/li>\n<\/ul>\n

      2. Gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c<\/h3>\n

      B\u1ed9 n\u00e3o con ng\u01b0\u1eddi g\u1eb7p kh\u00f3 kh\u0103n khi gi\u1eef c\u00e1c \u0111\u1ed3 th\u1ecb \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p trong b\u1ed9 nh\u1edb l\u00e0m vi\u1ec7c. B\u1eb1ng c\u00e1ch v\u1ebd tr\u1ea1ng th\u00e1i:<\/p>\n

        \n
      • B\u1ea1n chuy\u1ec3n t\u1ea3i th\u00f4ng tin ra trang gi\u1ea5y.<\/li>\n
      • B\u1ea1n gi\u1ea3m nhu c\u1ea7u xoay chuy\u1ec3n d\u1eef li\u1ec7u trong t\u00e2m tr\u00ed.<\/li>\n
      • B\u1ea1n c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c chu tr\u00ecnh ho\u1eb7c n\u00fat b\u1ecb b\u1ecf r\u01a1i m\u1ed9t c\u00e1ch tr\u1ef1c quan.<\/li>\n<\/ul>\n

        \u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong k\u1ef9 thu\u1eadt \ud83d\udee0\ufe0f<\/h2>\n

        T\u00ednh h\u1eefu d\u1ee5ng c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng m\u1edf r\u1ed9ng qua to\u00e0n b\u1ed9 v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m. Ch\u00fang kh\u00f4ng ch\u1ec9 l\u00e0 b\u00e0i t\u1eadp h\u1ecdc thu\u1eadt; ch\u00fang l\u00e0 c\u00f4ng c\u1ee5 th\u1ef1c ti\u1ec5n cho b\u1ea3o tr\u00ec v\u00e0 thi\u1ebft k\u1ebf.<\/p>\n

        G\u1ee1 l\u1ed7i c\u00e1c t\u00ecnh hu\u1ed1ng ph\u1ee9c t\u1ea1p \ud83d\udc1b<\/h3>\n

        Khi m\u1ed9t h\u1ec7 th\u1ed1ng th\u1ea5t b\u1ea1i, nh\u1eadt k\u00fd th\u01b0\u1eddng cung c\u1ea5p d\u1ea5u v\u1ebft c\u1ee7a c\u00e1c s\u1ef1 ki\u1ec7n. S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap kh\u00f4i ph\u1ee5c l\u1ea1i tr\u1ea1ng th\u00e1i d\u1eabn \u0111\u1ebfn s\u1ef1 c\u1ed1.<\/p>\n

          \n
        • Theo d\u00f5i lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong>B\u1ea3n \u0111\u1ed3 c\u00e1ch \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh m\u1ed9t b\u1ea3n ghi c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n
        • X\u00e1c \u0111\u1ecbnh c\u00e1c ph\u1ee5 thu\u1ed9c v\u00f2ng l\u1eb7p:<\/strong> Ki\u1ec3m tra xem \u0110\u1ed1i t\u01b0\u1ee3ng A c\u00f3 gi\u1eef tham chi\u1ebfu \u0111\u1ebfn \u0110\u1ed1i t\u01b0\u1ee3ng B, m\u00e0 \u0110\u1ed1i t\u01b0\u1ee3ng B l\u1ea1i gi\u1eef tham chi\u1ebfu ng\u01b0\u1ee3c l\u1ea1i v\u1ec1 \u0110\u1ed1i t\u01b0\u1ee3ng A, t\u1ea1o th\u00e0nh m\u1ed9t v\u00f2ng l\u1eb7p.<\/li>\n
        • R\u00f2 r\u1ec9 b\u1ed9 nh\u1edb:<\/strong>Tr\u1ef1c quan h\u00f3a c\u00e1c tham chi\u1ebfu t\u1ed3n t\u1ea1i l\u00e2u d\u00e0i ng\u0103n ch\u1eb7n vi\u1ec7c thu gom r\u00e1c.<\/li>\n<\/ul>\n

          Thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac d\u1eef li\u1ec7u \ud83e\udde9<\/h3>\n

          Tr\u01b0\u1edbc khi vi\u1ebft m\u00e3 cho c\u00e1c thu\u1eadt to\u00e1n ph\u1ee9c t\u1ea1p, vi\u1ec7c ph\u00e1c h\u1ecda tr\u1ea1ng th\u00e1i \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd l\u00e0m r\u00f5 y\u00eau c\u1ea7u.<\/p>\n

            \n
          • Thu\u1eadt to\u00e1n \u0111\u1ed3 th\u1ecb:<\/strong>Tr\u1ef1c quan h\u00f3a c\u00e1c n\u00fat v\u00e0 c\u1ea1nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o logic duy\u1ec7t l\u00e0 h\u1ee3p l\u00fd.<\/li>\n
          • C\u1ea5u tr\u00fac c\u00e2y:<\/strong>X\u00e1c nh\u1eadn c\u00e1c m\u1ed1i quan h\u1ec7 cha-con v\u00e0 c\u00e1ch x\u1eed l\u00fd c\u00e1c n\u00fat l\u00e1.<\/li>\n
          • Danh s\u00e1ch li\u00ean k\u1ebft:<\/strong>X\u00e1c minh c\u00e1c con tr\u1ecf \u0111\u1ea7u v\u00e0 cu\u1ed1i c\u0169ng nh\u01b0 c\u00e1c tham chi\u1ebfu ti\u1ebfp theo\/tr\u01b0\u1edbc.<\/li>\n<\/ul>\n

            T\u00e0i li\u1ec7u v\u00e0 chuy\u1ec3n giao \ud83d\udcdd<\/h3>\n

            M\u00e3 ngu\u1ed3n l\u00e0 t\u00e0i li\u1ec7u ch\u00ednh, nh\u01b0ng n\u00f3 r\u1ea5t d\u00e0y \u0111\u1eb7c. C\u00e1c s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea5p cao v\u1ec1 tr\u1ea1ng th\u00e1i h\u1ec7 th\u1ed1ng t\u1ea1i c\u00e1c th\u1eddi \u0111i\u1ec3m quan tr\u1ecdng.<\/p>\n

              \n
            • Th\u00e0nh vi\u00ean m\u1edbi trong nh\u00f3m:<\/strong>H\u1ecd c\u00f3 th\u1ec3 th\u1ea5y c\u00e1ch c\u00e1c th\u1ec3 hi\u1ec7n t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ecdc t\u1eebng d\u00f2ng m\u00e3.<\/li>\n
            • H\u1ee3p \u0111\u1ed3ng API:<\/strong>Hi\u1ec3n th\u1ecb c\u1ea5u tr\u00fac mong \u0111\u1ee3i c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ea3n h\u1ed3i.<\/li>\n
            • C\u00e1c tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed:<\/strong>X\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u c\u1ea7n thi\u1ebft cho c\u00e1c b\u00e0i ki\u1ec3m th\u1eed \u0111\u01a1n v\u1ecb.<\/li>\n<\/ul>\n

              C\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng \ud83e\uddf1<\/h2>\n

              \u0110\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, b\u1ea1n ph\u1ea3i hi\u1ec3u r\u00f5 c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee5 th\u1ec3 tham gia. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 duy tr\u00ec t\u00ednh uy t\u00edn trong t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n

                \n
              • C\u00e1c th\u1ec3 hi\u1ec7n \u0111\u1ed1i t\u01b0\u1ee3ng:<\/strong>\u0110\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng h\u00ecnh ch\u1eef nh\u1eadt. T\u00ean th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ea1ch ch\u00e2n \u0111\u1ec3 ch\u1ec9 r\u00f5 \u0111\u00e2y l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n, kh\u00f4ng ph\u1ea3i m\u1ed9t l\u1edbp (v\u00ed d\u1ee5:khach_hang_001<\/em>).<\/li>\n
              • Gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh:<\/strong>Li\u1ec7t k\u00ea b\u00ean trong h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ed1i t\u01b0\u1ee3ng. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 l\u1edbp hi\u1ec3n th\u1ecb ki\u1ec3u, c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y hi\u1ec3n th\u1ecb c\u00e1c gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i (v\u00ed d\u1ee5:s\u1ed1_d\u01b0: 500,00 USD<\/em>).<\/li>\n
              • Li\u00ean k\u1ebft:<\/strong> C\u00e1c \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho c\u00e1c m\u1ed1i li\u00ean k\u1ebft gi\u1eefa c\u00e1c th\u1ec3 hi\u1ec7n.<\/li>\n
              • T\u00ean vai tr\u00f2:<\/strong> Nh\u00e3n tr\u00ean c\u00e1c li\u00ean k\u1ebft ch\u1ec9 ch\u1ee9c n\u0103ng c\u1ee7a k\u1ebft n\u1ed1i (v\u00ed d\u1ee5 nh\u01b0 s\u1edf h\u1eefu<\/em>, qu\u1ea3n l\u00fd<\/em>).<\/li>\n
              • \u0110a d\u1ea1ng:<\/strong> M\u1eb7c d\u00f9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c ng\u1ee5 \u00fd b\u1edfi k\u1ebft n\u1ed1i, n\u00f3 cho bi\u1ebft c\u00f3 bao nhi\u00eau th\u1ec3 hi\u1ec7n tham gia (v\u00ed d\u1ee5: 1, 0..*).<\/li>\n<\/ul>\n

                X\u00e2y d\u1ef1ng th\u00f3i quen t\u01b0 duy t\u1ed1t h\u01a1n \ud83e\udde0<\/h2>\n

                S\u1eed d\u1ee5ng c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y thay \u0111\u1ed5i c\u00e1ch b\u1ea1n ti\u1ebfp c\u1eadn v\u1ea5n \u0111\u1ec1. N\u00f3 gi\u00fap b\u1ea1n chuy\u1ec3n t\u1eeb m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean ph\u1ea3n \u1ee9ng sang m\u1ed9t ki\u1ebfn tr\u00fac s\u01b0 ch\u1ee7 \u0111\u1ed9ng.<\/p>\n

                1. D\u1ef1 \u0111o\u00e1n c\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean<\/h3>\n

                Khi b\u1ea1n v\u1ebd c\u00e1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, b\u1ea1n t\u1ef1 nhi\u00ean s\u1ebd \u0111\u1eb7t c\u00e2u h\u1ecfi: \u201c\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu li\u00ean k\u1ebft n\u00e0y b\u1ecb \u0111\u1ee9t?\u201d hay \u201c\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0y l\u00e0 null?\u201d S\u1ef1 d\u1ef1 \u0111o\u00e1n n\u00e0y d\u1eabn \u0111\u1ebfn m\u00e3 ngu\u1ed3n v\u1eefng ch\u1eafc h\u01a1n.<\/p>\n

                2. \u0110\u01a1n gi\u1ea3n h\u00f3a \u0111\u1ed9 ph\u1ee9c t\u1ea1p<\/h3>\n

                C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch th\u00e0nh c\u00e1c \u0111\u1ed3 th\u1ecb \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1ecf h\u01a1n. B\u1eb1ng c\u00e1ch t\u00e1ch bi\u1ec7t c\u00e1c \u0111\u1ed3 th\u1ecb con, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 t\u1eebng ph\u1ea7n thay v\u00ec ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n

                3. N\u00e2ng cao giao ti\u1ebfp<\/h3>\n

                C\u00e1c b\u00ean li\u00ean quan th\u01b0\u1eddng g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi thu\u1eadt ng\u1eef k\u1ef9 thu\u1eadt. M\u1ed9t s\u01a1 \u0111\u1ed3 th\u1ec3 hi\u1ec7n m\u1ed9t \u0111\u01a1n h\u00e0ng k\u1ebft n\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng v\u00e0 s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5 h\u01a1n tr\u00ean to\u00e0n th\u1ebf gi\u1edbi so v\u1edbi m\u1ed9t b\u1ea3ng theo d\u00f5i ng\u0103n x\u1ebfp.<\/p>\n\n\n\n\n\n\n\n\n
                Th\u00f3i quen t\u01b0 duy<\/th>\nKh\u00f4ng c\u00f3 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng<\/th>\nC\u00f3 s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng<\/th>\n<\/tr>\n<\/thead>\n
                Ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1<\/td>\nSuy lu\u1eadn tr\u1eebu t\u01b0\u1ee3ng<\/td>\nTr\u1ef1c quan h\u00f3a c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n
                G\u1ee1 l\u1ed7i<\/td>\nPh\u1ecfng \u0111o\u00e1n tr\u1ea1ng th\u00e1i<\/td>\nX\u00e1c minh tr\u1ea1ng th\u00e1i<\/td>\n<\/tr>\n
                T\u00e1i c\u1ea5u tr\u00fac<\/td>\nR\u1ee7i ro l\u00e0m \u0111\u1ee9t li\u00ean k\u1ebft<\/td>\nT\u00e1i c\u1ea5u tr\u00fac an to\u00e0n<\/td>\n<\/tr>\n
                \u0110\u1ed3ng b\u1ed9 \u0111\u1ed9i nh\u00f3m<\/td>\nM\u00f4 t\u1ea3 b\u1eb1ng l\u1eddi<\/td>\nC\u0103n ch\u1ec9nh h\u00ecnh \u1ea3nh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

                Ngay c\u1ea3 v\u1edbi nh\u1eefng \u00fd \u0111\u1ecbnh t\u1ed1t nh\u1ea5t, s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 tr\u1edf n\u00ean l\u1ed9n x\u1ed9n ho\u1eb7c g\u00e2y hi\u1ec3u l\u1ea7m. H\u00e3y tr\u00e1nh nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn n\u00e0y \u0111\u1ec3 duy tr\u00ec s\u1ef1 r\u00f5 r\u00e0ng.<\/p>\n

                  \n
                • Qu\u00e1 t\u1ea3i s\u01a1 \u0111\u1ed3:<\/strong> \u0110\u1eebng bao g\u1ed3m m\u1ecdi \u0111\u1ed1i t\u01b0\u1ee3ng trong m\u1ed9t h\u1ec7 th\u1ed1ng l\u1edbn. H\u00e3y t\u1eadp trung v\u00e0o t\u00ecnh hu\u1ed1ng ho\u1eb7c m\u00f4-\u0111un c\u1ee5 th\u1ec3 m\u00e0 b\u1ea1n \u0111ang ph\u00e2n t\u00edch.<\/li>\n
                • T\u00ean g\u1ecdi kh\u00f4ng nh\u1ea5t qu\u00e1n:<\/strong> S\u1eed d\u1ee5ng quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean r\u00f5 r\u00e0ng v\u00e0 nh\u1ea5t qu\u00e1n cho c\u00e1c th\u1ec3 hi\u1ec7n. S\u1ef1 m\u01a1 h\u1ed3 s\u1ebd ph\u00e1 v\u1ee1 m\u1ee5c \u0111\u00edch c\u1ee7a s\u01a1 \u0111\u1ed3.<\/li>\n
                • B\u1ecf qua c\u00e1c thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i:<\/strong> H\u00e3y nh\u1edb r\u1eb1ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh t\u0129nh. N\u1ebfu tr\u1ea1ng th\u00e1i thay \u0111\u1ed5i th\u01b0\u1eddng xuy\u00ean, b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n nhi\u1ec1u s\u01a1 \u0111\u1ed3 \u0111\u1ec3 k\u1ec3 to\u00e0n b\u1ed9 c\u00e2u chuy\u1ec7n.<\/li>\n
                • Nh\u1ea7m l\u1eabn li\u00ean k\u1ebft v\u1edbi ph\u01b0\u01a1ng th\u1ee9c:<\/strong> C\u00e1c li\u00ean k\u1ebft \u0111\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u1eddi g\u1ecdi h\u00e0m. \u0110\u1eebng v\u1ebd m\u0169i t\u00ean cho c\u00e1c l\u1eddi g\u1ecdi ph\u01b0\u01a1ng th\u1ee9c tr\u1eeb khi c\u1ee5 th\u1ec3 m\u00f4 h\u00ecnh h\u00f3a m\u1ed9t tr\u00ecnh t\u1ef1.<\/li>\n
                • B\u1ecf qua c\u00e1c gi\u00e1 tr\u1ecb thu\u1ed9c t\u00ednh:<\/strong> S\u1ee9c m\u1ea1nh c\u1ee7a s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng n\u1eb1m \u1edf c\u00e1c gi\u00e1 tr\u1ecb. N\u1ebfu b\u1ea1n ch\u1ec9 v\u1ebd c\u1ea5u tr\u00fac, b\u1ea1n \u0111\u00e3 t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3 l\u1edbp \u1ea9n d\u01b0\u1edbi h\u00ecnh th\u1ee9c kh\u00e1c.<\/li>\n<\/ul>\n

                  T\u00edch h\u1ee3p v\u00e0o quy tr\u00ecnh ph\u00e1t tri\u1ec3n \ud83d\udd04<\/h2>\n

                  Vi\u1ec7c t\u00edch h\u1ee3p s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0o c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt. Ch\u00fang kh\u00f4ng n\u00ean l\u00e0 \u0111i\u1ec1u sau c\u00f9ng \u0111\u01b0\u1ee3c ngh\u0129 \u0111\u1ebfn.<\/p>\n

                  Trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf<\/h3>\n

                  Tr\u01b0\u1edbc khi l\u1eadp tr\u00ecnh, h\u00e3y ph\u00e1c h\u1ecda s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng mong \u0111\u1ee3i. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u1ea5u tr\u00fac l\u1edbp c\u1ee7a b\u1ea1n h\u1ed7 tr\u1ee3 nhu c\u1ea7u t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh.<\/p>\n

                  Trong giai \u0111o\u1ea1n ki\u1ec3m th\u1eed<\/h3>\n

                  S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c b\u1ed9 d\u1eef li\u1ec7u ki\u1ec3m th\u1eed. V\u1ebd tr\u1ea1ng th\u00e1i b\u1ea1n c\u1ea7n t\u1ea1o tr\u01b0\u1edbc khi th\u1ef1c thi logic ki\u1ec3m th\u1eed.<\/p>\n

                  Trong giai \u0111o\u1ea1n b\u1ea3o tr\u00ec<\/h3>\n

                  Khi s\u1eeda l\u1ed7i, c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 \u0111\u1ec3 ph\u1ea3n \u00e1nh h\u00e0nh vi hi\u1ec7n t\u1ea1i. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u00e0i li\u1ec7u lu\u00f4n \u0111\u1ed3ng b\u1ed9 v\u1edbi th\u1ef1c t\u1ebf.<\/p>\n

                  C\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao: \u0110a h\u00ecnh v\u00e0 K\u1ebf th\u1eeba \ud83c\udfdb\ufe0f<\/h2>\n

                  S\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c t\u00ecnh hu\u1ed1ng k\u1ebf th\u1eeba ph\u1ee9c t\u1ea1p, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi l\u1eadp tr\u00ecnh h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

                    \n
                  • \u0110a h\u00ecnh ki\u1ec3u:<\/strong> M\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp con c\u0169ng l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp cha. \u0110i\u1ec1u n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh trong c\u00e1c li\u00ean k\u1ebft.<\/li>\n
                  • Th\u1ef1c hi\u1ec7n giao di\u1ec7n:<\/strong> Hi\u1ec3n th\u1ecb c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh vi c\u1ee5 th\u1ec3, ngay c\u1ea3 khi ch\u00fang \u0111\u1ebfn t\u1eeb c\u00e1c c\u00e2y l\u1edbp kh\u00e1c nhau.<\/li>\n
                  • G\u00e1n \u0111\u1ed9ng:<\/strong> H\u00ecnh dung c\u00e1ch li\u00ean k\u1ebft gi\u1ed1ng nhau c\u00f3 th\u1ec3 tr\u1ecf \u0111\u1ebfn c\u00e1c lo\u1ea1i \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau t\u1ea1i th\u1eddi \u0111i\u1ec3m ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh.<\/li>\n<\/ul>\n

                    Hi\u1ec3u \u0111\u01b0\u1ee3c nh\u1eefng s\u1eafc th\u00e1i n\u00e0y gi\u00fap b\u1ea1n thi\u1ebft k\u1ebf c\u00e1c h\u1ec7 th\u1ed1ng linh ho\u1ea1t. B\u1ea1n c\u00f3 th\u1ec3 m\u00f4 h\u00ecnh h\u00f3a c\u00e1ch m\u1ed9t container t\u1ed5ng qu\u00e1t l\u01b0u tr\u1eef c\u00e1c m\u1ee5c c\u1ee5 th\u1ec3 m\u00e0 kh\u00f4ng c\u1ea7n bi\u1ebft lo\u1ea1i ch\u00ednh x\u00e1c t\u1eeb tr\u01b0\u1edbc.<\/p>\n

                    K\u1ebft lu\u1eadn v\u1ec1 t\u01b0 duy h\u1ec7 th\u1ed1ng \ud83c\udfaf<\/h2>\n

                    Vi\u1ec7c \u00e1p d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 v\u1ebd c\u00e1c h\u00ecnh h\u1ed9p v\u00e0 \u0111\u01b0\u1eddng k\u1ebb. \u0110\u00f3 l\u00e0 vi\u1ec7c ph\u00e1t tri\u1ec3n m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 k\u1ef7 lu\u1eadt \u0111\u1ec3 hi\u1ec3u tr\u1ea1ng th\u00e1i. B\u1eb1ng c\u00e1ch l\u00e0m r\u00f5 nh\u1eefng ho\u1ea1t \u0111\u1ed9ng v\u00f4 h\u00ecnh c\u1ee7a b\u1ed9 nh\u1edb v\u00e0 tham chi\u1ebfu, b\u1ea1n gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3 v\u00e0 t\u0103ng \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n

                    Khi b\u1ea1n ti\u1ebfp t\u1ee5c h\u00e0nh tr\u00ecnh k\u1ef9 thu\u1eadt c\u1ee7a m\u00ecnh, h\u00e3y t\u00edch h\u1ee3p nh\u1eefng h\u00ecnh minh h\u1ecda n\u00e0y v\u00e0o c\u00f4ng c\u1ee5 c\u1ee7a b\u1ea1n. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t c\u00e2y c\u1ea7u n\u1ed1i gi\u1eefa logic tr\u1eebu t\u01b0\u1ee3ng c\u1ee7a c\u00e1c thu\u1eadt to\u00e1n v\u00e0 th\u1ef1c t\u1ebf c\u1ee5 th\u1ec3 c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u00e3 tri\u1ec3n khai. C\u00e2y c\u1ea7u n\u00e0y ch\u00ednh l\u00e0 n\u01a1i ph\u1ea7n m\u1ec1m m\u1ea1nh m\u1ebd \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng.<\/p>\n

                    B\u1eaft \u0111\u1ea7u t\u1eeb nh\u1ecf. Ch\u1ecdn m\u1ed9t module ph\u1ee9c t\u1ea1p trong d\u1ef1 \u00e1n hi\u1ec7n t\u1ea1i c\u1ee7a b\u1ea1n. V\u1ebd tr\u1ea1ng th\u00e1i \u0111\u1ed1i t\u01b0\u1ee3ng. B\u1ea1n c\u00f3 th\u1ec3 s\u1ebd t\u00ecm th\u1ea5y nh\u1eefng hi\u1ec3u bi\u1ebft m\u1edbi m\u00e0 m\u00e3 ngu\u1ed3n \u0111\u01a1n thu\u1ea7n \u0111\u00e3 che gi\u1ea5u. Th\u1ef1c h\u00e0nh n\u00e0y r\u00e8n luy\u1ec7n tr\u00ed \u00f3c c\u1ee7a b\u1ea1n, gi\u1ed1ng nh\u01b0 c\u00e1c c\u00f4ng c\u1ee5 r\u00e8n luy\u1ec7n m\u00e3 ngu\u1ed3n c\u1ee7a b\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"

                    K\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 vi\u1ebft m\u00e3; v\u1ec1 b\u1ea3n ch\u1ea5t, n\u00f3 l\u00e0 vi\u1ec7c c\u1ea5u tr\u00fac t\u01b0 duy. Khi c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u01b0\u1ee3t qua ng\u1eef ph\u00e1p…<\/p>\n","protected":false},"author":1,"featured_media":1526,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Object diagrams h\u00ecnh th\u00e0nh t\u01b0 duy c\u1ee7a k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m nh\u01b0 th\u1ebf n\u00e0o \ud83e\udde0","_yoast_wpseo_metadesc":"Kh\u00e1m ph\u00e1 c\u00e1ch s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng tinh ch\u1ec9nh thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, g\u1ee1 l\u1ed7i tr\u1ea1ng th\u00e1i ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh v\u00e0 r\u00e8n luy\u1ec7n t\u01b0 duy k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n. M\u1ed9t h\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf v\u1ec1 m\u00f4 h\u00ecnh h\u00f3a UML.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[54],"tags":[84,85],"class_list":["post-1525","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-object-diagram"],"yoast_head":"\nObject diagrams h\u00ecnh th\u00e0nh t\u01b0 duy c\u1ee7a k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m nh\u01b0 th\u1ebf n\u00e0o \ud83e\udde0<\/title>\n<meta name=\"description\" content=\"Kh\u00e1m ph\u00e1 c\u00e1ch s\u01a1 \u0111\u1ed3 \u0111\u1ed1i t\u01b0\u1ee3ng tinh ch\u1ec9nh thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng, g\u1ee1 l\u1ed7i tr\u1ea1ng th\u00e1i ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh v\u00e0 r\u00e8n luy\u1ec7n t\u01b0 duy k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n. 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