{"id":69,"date":"2026-04-10T07:52:37","date_gmt":"2026-04-10T07:52:37","guid":{"rendered":"https:\/\/www.hi-posts.com\/vn\/object-oriented-analysis-design-scenarios-exercises\/"},"modified":"2026-04-10T07:52:37","modified_gmt":"2026-04-10T07:52:37","slug":"object-oriented-analysis-design-scenarios-exercises","status":"publish","type":"post","link":"https:\/\/www.hi-posts.com\/vn\/object-oriented-analysis-design-scenarios-exercises\/","title":{"rendered":"C\u00e1c t\u00ecnh hu\u1ed1ng Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: C\u00e1c b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh \u0111\u1ec3 ki\u1ec3m tra t\u01b0 duy thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n"},"content":{"rendered":"

X\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m m\u1ea1nh m\u1ebd \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c vi\u1ebft m\u00e3. N\u00f3 \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 hi\u1ec3u v\u1ea5n \u0111\u1ec1 v\u00e0 t\u1ed5 ch\u1ee9c gi\u1ea3i ph\u00e1p. Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng (OOAD) cung c\u1ea5p khung n\u00e0y. B\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, t\u01b0\u01a1ng t\u00e1c c\u1ee7a ch\u00fang v\u00e0 tr\u00e1ch nhi\u1ec7m c\u1ee7a ch\u00fang, c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 b\u1ea3o tr\u00ec, m\u1edf r\u1ed9ng v\u00e0 th\u00edch nghi. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 r\u00e8n luy\u1ec7n t\u01b0 duy thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n. Ch\u00fang ta s\u1ebd \u0111i qua c\u00e1c b\u00e0i t\u1eadp c\u1ee5 th\u1ec3, \u0111\u00e1nh gi\u00e1 c\u00e1c l\u1ef1a ch\u1ecdn thi\u1ebft k\u1ebf v\u00e0 thi\u1ebft l\u1eadp ti\u00eau ch\u00ed th\u00e0nh c\u00f4ng m\u00e0 kh\u00f4ng d\u1ef1a v\u00e0o l\u1eddi qu\u1ea3ng c\u00e1o hay c\u00e1c c\u00e1ch l\u00e0m t\u1eaft.<\/p>\n

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

Hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i \ud83c\udfd7\ufe0f<\/h2>\n

Tr\u01b0\u1edbc khi b\u01b0\u1edbc v\u00e0o c\u00e1c t\u00ecnh hu\u1ed1ng ph\u1ee9c t\u1ea1p, \u0111i\u1ec1u thi\u1ebft y\u1ebfu l\u00e0 ph\u1ea3i n\u1eafm v\u1eefng nh\u1eefng n\u1ec1n t\u1ea3ng c\u1ed1t l\u00f5i c\u1ee7a t\u01b0 duy h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y d\u1eabn d\u1eaft vi\u1ec7c t\u1ea1o ra c\u00e1c l\u1edbp v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. Kh\u00f4ng n\u1eafm v\u1eefng c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y, c\u00e1c t\u00ecnh hu\u1ed1ng thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 nhanh ch\u00f3ng tr\u1edf th\u00e0nh nh\u1eefng m\u1ea1ng l\u01b0\u1edbi r\u1ed1i r\u1eafm v\u1ec1 ph\u1ee5 thu\u1ed9c.<\/p>\n

    \n
  • Bao \u0111\u00f3ng:<\/strong>Che gi\u1ea5u tr\u1ea1ng th\u00e1i b\u00ean trong v\u00e0 y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u00e1c th\u00f4ng qua c\u00e1c giao di\u1ec7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng.<\/li>\n
  • K\u1ebf th\u1eeba:<\/strong>Thi\u1ebft l\u1eadp c\u00e1c c\u1ea5p \u0111\u1ed9 \u0111\u1ec3 chia s\u1ebb c\u00e1c h\u00e0nh vi v\u00e0 thu\u1ed9c t\u00ednh chung.<\/li>\n
  • \u0110a h\u00ecnh:<\/strong>Cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ec3 l\u00e0 th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp cha, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n linh ho\u1ea1t.<\/li>\n
  • Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a:<\/strong>\u0110\u01a1n gi\u1ea3n h\u00f3a th\u1ef1c t\u1ea1i ph\u1ee9c t\u1ea1p b\u1eb1ng c\u00e1ch m\u00f4 h\u00ecnh h\u00f3a c\u00e1c l\u1edbp ph\u00f9 h\u1ee3p v\u1edbi g\u00f3c nh\u00ecn c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/li>\n
  • Nguy\u00ean t\u1eafc SOLID:<\/strong>M\u1ed9t b\u1ed9 n\u0103m nguy\u00ean t\u1eafc nh\u1eb1m gi\u00fap 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.<\/li>\n<\/ul>\n

    M\u1ed7i t\u00ecnh hu\u1ed1ng d\u01b0\u1edbi \u0111\u00e2y th\u00e1ch th\u1ee9c b\u1ea1n \u00e1p d\u1ee5ng nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y trong b\u1ed1i c\u1ea3nh th\u1ef1c t\u1ebf. M\u1ee5c ti\u00eau kh\u00f4ng ch\u1ec9 l\u00e0 t\u1ea1o ra m\u1ed9t s\u01a1 \u0111\u1ed3, m\u00e0 c\u00f2n ph\u1ea3i gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng t\u1eebng m\u1ed1i quan h\u1ec7 v\u00e0 tr\u00e1ch nhi\u1ec7m \u0111\u01b0\u1ee3c g\u00e1n cho m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

    T\u00ecnh hu\u1ed1ng 1: Qu\u1ea3n l\u00fd kho h\u00e0ng cho th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed \ud83d\uded2<\/h2>\n

    H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd t\u1ed3n kho cho m\u1ed9t nh\u00e0 b\u00e1n l\u1ebb tr\u1ef1c tuy\u1ebfn. Logic kinh doanh ph\u1ee9c t\u1ea1p v\u00ec c\u00e1c m\u1eb7t h\u00e0ng kh\u00e1c nhau v\u1ec1 lo\u1ea1i (v\u1eadt l\u00fd, k\u1ef9 thu\u1eadt s\u1ed1, \u0111\u0103ng k\u00fd), quy t\u1eafc v\u1eadn chuy\u1ec3n kh\u00e1c nhau, v\u00e0 m\u1ee9c t\u1ed3n kho ph\u1ea3i ch\u00ednh x\u00e1c tr\u00ean nhi\u1ec1u kho h\u00e0ng. T\u00ecnh hu\u1ed1ng n\u00e0y ki\u1ec3m tra kh\u1ea3 n\u0103ng m\u00f4 h\u00ecnh h\u00f3a s\u1ef1 \u0111a d\u1ea1ng v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c c\u1ee7a b\u1ea1n.<\/p>\n

    C\u00e1c b\u01b0\u1edbc th\u1ef1c h\u00e0nh<\/h3>\n
      \n
    1. X\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh:<\/strong>Li\u1ec7t k\u00ea c\u00e1c danh t\u1eeb \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong b\u1ea3n m\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1. V\u00ed d\u1ee5 bao g\u1ed3m Product (S\u1ea3n ph\u1ea9m), Warehouse (Kho h\u00e0ng), Order (\u0110\u01a1n h\u00e0ng), Customer (Kh\u00e1ch h\u00e0ng), v\u00e0 InventoryRecord (S\u1ed5 ghi nh\u1eadn t\u1ed3n kho).<\/li>\n
    2. X\u00e1c \u0111\u1ecbnh tr\u00e1ch nhi\u1ec7m:<\/strong>V\u1edbi m\u1ed7i th\u1ef1c th\u1ec3, x\u00e1c \u0111\u1ecbnh d\u1eef li\u1ec7u n\u00f3 l\u01b0u tr\u1eef v\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng n\u00f3 th\u1ef1c hi\u1ec7n. \u0110\u1ed1i t\u01b0\u1ee3ng Product c\u00f3 bi\u1ebft v\u1ec1 chi ph\u00ed v\u1eadn chuy\u1ec3n kh\u00f4ng? Th\u01b0\u1eddng l\u00e0 kh\u00f4ng. \u0110\u1ed1i t\u01b0\u1ee3ng InventoryRecord c\u00f3 bi\u1ebft c\u00e1ch \u0111\u1eb7t gi\u1eef h\u00e0ng t\u1ed3n kho kh\u00f4ng? C\u00f3.<\/li>\n
    3. X\u00e1c \u0111\u1ecbnh m\u1ed1i quan h\u1ec7:<\/strong>X\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c th\u1ef1c th\u1ec3 n\u00e0y t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. M\u1ed9t s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u1edf nhi\u1ec1u kho h\u00e0ng. M\u1ed9t \u0111\u01a1n h\u00e0ng ch\u1ee9a nhi\u1ec1u s\u1ed5 ghi nh\u1eadn t\u1ed3n kho.<\/li>\n
    4. \u00c1p d\u1ee5ng \u0111a h\u00ecnh:<\/strong>Xem x\u00e9t c\u00e1ch x\u1eed l\u00fd c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m kh\u00e1c nhau (v\u00ed d\u1ee5: H\u1ecfng h\u1ecfng so v\u1edbi Chu\u1ea9n). S\u1eed d\u1ee5ng m\u1ed9t l\u1edbp Product c\u01a1 b\u1ea3n v\u00e0 c\u00e1c l\u1edbp con c\u1ee5 th\u1ec3.<\/li>\n<\/ol>\n

      C\u00e1c c\u00e2n nh\u1eafc thi\u1ebft k\u1ebf<\/h3>\n
        \n
      • Vi\u1ec7c ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u1ed3n kho n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf c\u1ea5p \u0111\u1ed9 S\u1ea3n ph\u1ea9m hay c\u1ea5p \u0111\u1ed9 S\u1ed5 ghi nh\u1eadn t\u1ed3n kho?C\u00e2u tr\u1ea3 l\u1eddi:<\/strong>S\u1ed5 ghi nh\u1eadn t\u1ed3n kho. M\u1ed9t s\u1ea3n ph\u1ea9m t\u1ed3n t\u1ea1i tr\u00ean to\u00e0n c\u1ea7u, nh\u01b0ng t\u1ed3n kho l\u00e0 \u0111\u1ecba ph\u01b0\u01a1ng t\u1ea1i m\u1ed9t kho h\u00e0ng.<\/li>\n
      • B\u1ea1n x\u1eed l\u00fd c\u00e1c c\u1eadp nh\u1eadt \u0111\u1ed3ng th\u1eddi cho c\u00f9ng m\u1ed9t m\u1eb7t h\u00e0ng t\u1ed3n kho nh\u01b0 th\u1ebf n\u00e0o?C\u00e2u tr\u1ea3 l\u1eddi:<\/strong>Th\u1ef1c hi\u1ec7n c\u01a1 ch\u1ebf kh\u00f3a ho\u1eb7c ki\u1ec3m so\u00e1t \u0111\u1ed3ng th\u1eddi t\u1ed1i \u01b0u trong InventoryRecord.<\/li>\n
      • \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu m\u1ed9t \u0111\u01a1n h\u00e0ng th\u1ea5t b\u1ea1i thanh to\u00e1n?C\u00e2u tr\u1ea3 l\u1eddi:<\/strong>InventoryRecord ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng gi\u1ea3i ph\u00f3ng s\u1ed1 l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u1eb7t tr\u01b0\u1edbc.<\/li>\n<\/ul>\n

        V\u00ed d\u1ee5 c\u1ea5u tr\u00fac l\u1edbp<\/h3>\n\n\n\n\n\n
        T\u00ean l\u1edbp<\/th>\nThu\u1ed9c t\u00ednh ch\u00ednh<\/th>\nPh\u01b0\u01a1ng th\u1ee9c ch\u00ednh<\/th>\n<\/tr>\n
        S\u1ea3n ph\u1ea9m<\/td>\nid, t\u00ean, m\u00f4 t\u1ea3, gi\u00e1 c\u01a1 b\u1ea3n<\/td>\ngetDetails(), updatePrice()<\/td>\n<\/tr>\n
        InventoryRecord<\/td>\nproductId, warehouseId, s\u1ed1 l\u01b0\u1ee3ng, s\u1ed1 l\u01b0\u1ee3ng \u0111\u00e3 \u0111\u1eb7t tr\u01b0\u1edbc<\/td>\nreserve(), release(), checkAvailability()<\/td>\n<\/tr>\n
        \u0110\u01a1n h\u00e0ng<\/td>\norderId, customerId, items[], tr\u1ea1ng th\u00e1i<\/td>\naddItem(), calculateTotal(), cancel()<\/td>\n<\/tr>\n<\/table>\n

        T\u00ecnh hu\u1ed1ng 2: X\u00e1c th\u1ef1c v\u00e0 ph\u00e2n quy\u1ec1n ng\u01b0\u1eddi d\u00f9ng \ud83d\udd10<\/h2>\n

        B\u1ea3o m\u1eadt l\u00e0 v\u1ea5n \u0111\u1ec1 quan tr\u1ecdng trong c\u00e1c h\u1ec7 th\u1ed1ng hi\u1ec7n \u0111\u1ea1i. T\u00ecnh hu\u1ed1ng n\u00e0y t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e1c minh danh t\u00ednh v\u00e0 x\u00e1c \u0111\u1ecbnh quy\u1ec1n truy c\u1eadp. Thi\u1ebft k\u1ebf ph\u1ea3i an to\u00e0n, m\u1edf r\u1ed9ng \u0111\u01b0\u1ee3c cho c\u00e1c ph\u01b0\u01a1ng th\u1ee9c \u0111\u0103ng nh\u1eadp m\u1edbi, v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 m\u1eb7t hi\u1ec7u su\u1ea5t.<\/p>\n

        C\u00e1c b\u01b0\u1edbc th\u1ef1c h\u00e0nh<\/h3>\n
          \n
        1. M\u00f4 h\u00ecnh ng\u01b0\u1eddi d\u00f9ng v\u00e0 vai tr\u00f2:<\/strong>T\u1ea1o m\u1ed9t l\u1edbp User \u0111\u1ec3 l\u01b0u tr\u1eef th\u00f4ng tin \u0111\u0103ng nh\u1eadp. T\u1ea1o m\u1ed9t l\u1edbp Role \u0111\u1ec3 \u0111\u1ecbnh ngh\u0129a quy\u1ec1n h\u1ea1n.<\/li>\n
        2. T\u00e1ch bi\u1ec7t c\u00e1c v\u1ea5n \u0111\u1ec1:<\/strong>Kh\u00f4ng tr\u1ed9n l\u1eabn logic x\u00e1c th\u1ef1c (ki\u1ec3m tra m\u1eadt kh\u1ea9u) v\u1edbi logic ph\u00e2n quy\u1ec1n (ki\u1ec3m tra quy\u1ec1n h\u1ea1n). T\u1ea1o c\u00e1c th\u00e0nh ph\u1ea7n ri\u00eang bi\u1ec7t cho t\u1eebng m\u1ee5c.<\/li>\n
        3. X\u1eed l\u00fd nhi\u1ec1u lo\u1ea1i x\u00e1c th\u1ef1c:<\/strong>H\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 m\u1eadt kh\u1ea9u, token ho\u1eb7c sinh tr\u1eafc h\u1ecdc. S\u1eed d\u1ee5ng giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng cho AuthenticationMethod.<\/li>\n
        4. Qu\u1ea3n l\u00fd phi\u00ean l\u00e0m vi\u1ec7c:<\/strong>Thi\u1ebft k\u1ebf m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u1ec3 qu\u1ea3n l\u00fd c\u00e1c phi\u00ean ho\u1ea1t \u0111\u1ed9ng, \u0111\u1ea3m b\u1ea3o ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng th\u1ec3 \u0111\u0103ng nh\u1eadp \u0111\u1ed3ng th\u1eddi t\u1eeb nhi\u1ec1u thi\u1ebft b\u1ecb n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n<\/ol>\n

          Xem x\u00e9t thi\u1ebft k\u1ebf<\/h3>\n
            \n
          • B\u1ea3o m\u1eadt:<\/strong>Kh\u00f4ng bao gi\u1edd l\u01b0u m\u1eadt kh\u1ea9u d\u01b0\u1edbi d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n. L\u1edbp User ch\u1ec9 n\u00ean l\u01b0u gi\u00e1 tr\u1ecb \u0111\u00e3 b\u0103m.<\/li>\n
          • Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong>N\u1ebfu b\u1ea1n c\u1ea7n th\u00eam x\u00e1c th\u1ef1c hai y\u1ebfu t\u1ed1 sau n\u00e0y, thi\u1ebft k\u1ebf ph\u1ea3i cho ph\u00e9p \u0111i\u1ec1u \u0111\u00f3 m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft l\u1ea1i logic c\u1ed1t l\u00f5i c\u1ee7a l\u1edbp User.<\/li>\n
          • Hi\u1ec7u su\u1ea5t:<\/strong>Ki\u1ec3m tra ph\u00e2n quy\u1ec1n x\u1ea3y ra v\u1edbi m\u1ed7i y\u00eau c\u1ea7u. D\u00f9ng b\u1ed9 nh\u1edb \u0111\u1ec7m vai tr\u00f2 khi c\u00f3 th\u1ec3 \u0111\u1ec3 gi\u1ea3m s\u1ed1 l\u1ea7n truy v\u1ea5n c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

            Lu\u1ed3ng t\u01b0\u01a1ng t\u00e1c<\/h3>\n

            1. Ng\u01b0\u1eddi d\u00f9ng g\u1eedi th\u00f4ng tin x\u00e1c th\u1ef1c.
            \n2. AuthenticationController x\u00e1c th\u1ef1c \u0111\u1ed1i chi\u1ebfu v\u1edbi CredentialStore.
            \n3. N\u1ebfu h\u1ee3p l\u1ec7, m\u1ed9t AuthToken s\u1ebd \u0111\u01b0\u1ee3c t\u1ea1o ra.
            \n4. AuthorizationService ki\u1ec3m tra xem ng\u01b0\u1eddi d\u00f9ng c\u00f3 vai tr\u00f2 c\u1ea7n thi\u1ebft cho h\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u hay kh\u00f4ng.
            \n5. T\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c truy c\u1eadp ho\u1eb7c truy c\u1eadp b\u1ecb t\u1eeb ch\u1ed1i.<\/p>\n

            K\u1ecbch b\u1ea3n 3: H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd thi\u1ebft b\u1ecb IoT \ud83d\udce1<\/h2>\n

            Internet v\u1ea1n v\u1eadt mang l\u1ea1i nh\u1eefng th\u00e1ch th\u1ee9c \u0111\u1eb7c bi\u1ec7t. C\u00e1c thi\u1ebft b\u1ecb th\u01b0\u1eddng b\u1ecb gi\u1edbi h\u1ea1n t\u00e0i nguy\u00ean, giao ti\u1ebfp qua m\u1ea1ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd t\u1eeb xa. K\u1ecbch b\u1ea3n n\u00e0y ki\u1ec3m tra kh\u1ea3 n\u0103ng m\u00f4 h\u00ecnh h\u00f3a m\u00e1y tr\u1ea1ng th\u00e1i v\u00e0 giao th\u1ee9c truy\u1ec1n th\u00f4ng c\u1ee7a b\u1ea1n.<\/p>\n

            C\u00e1c b\u01b0\u1edbc th\u1ef1c h\u00e0nh<\/h3>\n
              \n
            1. X\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i thi\u1ebft b\u1ecb:<\/strong> M\u1ed9t thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 \u1edf tr\u1ea1ng th\u00e1i Ng\u1eaft k\u1ebft n\u1ed1i, \u0110ang k\u1ebft n\u1ed1i, Ho\u1ea1t \u0111\u1ed9ng, L\u1ed7i ho\u1eb7c \u0110ang c\u1eadp nh\u1eadt. S\u1eed d\u1ee5ng m\u1eabu State \u0111\u1ec3 qu\u1ea3n l\u00fd chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/li>\n
            2. X\u1eed l\u00fd k\u1ebft n\u1ed1i:<\/strong> T\u1ea1o m\u1ed9t l\u1edbp NetworkManager ch\u1ecbu tr\u00e1ch nhi\u1ec7m g\u1eedi d\u1eef li\u1ec7u v\u00e0 nh\u1eadn l\u1ec7nh. N\u00f3 ph\u1ea3i x\u1eed l\u00fd vi\u1ec7c th\u1eed l\u1ea1i v\u00e0 th\u1eddi gian ch\u1edd h\u1ebft h\u1ea1n.<\/li>\n
            3. D\u1eef li\u1ec7u truy\u1ec1n c\u1ea3m bi\u1ebfn:<\/strong> M\u00f4 h\u00ecnh h\u00f3a c\u00e1c \u0111i\u1ec3m d\u1eef li\u1ec7u d\u01b0\u1edbi d\u1ea1ng \u0111\u1ed1i t\u01b0\u1ee3ng. Nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 \u1ea9m v\u00e0 \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 c\u00f9ng chia s\u1ebb m\u1ed9t giao di\u1ec7n TelemetryData chung.<\/li>\n
            4. Th\u1ef1c thi l\u1ec7nh:<\/strong> C\u00e1c l\u1ec7nh g\u1eedi t\u1eeb \u0111\u00e1m m\u00e2y (v\u00ed d\u1ee5: \u201cKh\u1edfi \u0111\u1ed9ng l\u1ea1i\u201d) n\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t v\u00e0o h\u00e0ng \u0111\u1ee3i v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb th\u1ef1c thi m\u1ed9t c\u00e1ch an to\u00e0n.<\/li>\n<\/ol>\n

              Xem x\u00e9t thi\u1ebft k\u1ebf<\/h3>\n
                \n
              • Qu\u1ea3n l\u00fd tr\u1ea1ng th\u00e1i:<\/strong> M\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 v\u1eeba \u1edf tr\u1ea1ng th\u00e1i ‘Ho\u1ea1t \u0111\u1ed9ng’ v\u1eeba \u1edf tr\u1ea1ng th\u00e1i ‘\u0110ang c\u1eadp nh\u1eadt’ c\u00f9ng l\u00fac. B\u1eaft bu\u1ed9c chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i nghi\u00eam ng\u1eb7t.<\/li>\n
              • Gi\u1edbi h\u1ea1n t\u00e0i nguy\u00ean:<\/strong> Kh\u00f4ng t\u1ea1o c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p ti\u00eau t\u1ed1n qu\u00e1 nhi\u1ec1u b\u1ed9 nh\u1edb. Gi\u1eef c\u1ea5u tr\u00fac d\u1eef li\u1ec7u nh\u1eb9 nh\u00e0ng.<\/li>\n
              • Thao t\u00e1c b\u1ea5t \u0111\u1ed3ng b\u1ed9:<\/strong> C\u00e1c l\u1ec7nh th\u01b0\u1eddng n\u00ean x\u1eed l\u00fd b\u1ea5t \u0111\u1ed3ng b\u1ed9. Thi\u1ebft b\u1ecb n\u00ean x\u00e1c nh\u1eadn \u0111\u00e3 nh\u1eadn nh\u01b0ng x\u1eed l\u00fd sau.<\/li>\n<\/ul>\n

                Ti\u00eau ch\u00ed \u0111\u00e1nh gi\u00e1 thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n \ud83d\udcca<\/h2>\n

                Sau khi b\u1ea1n \u0111\u00e3 m\u00f4 h\u00ecnh h\u00f3a m\u1ed9t t\u00ecnh hu\u1ed1ng, l\u00e0m sao b\u1ea1n bi\u1ebft thi\u1ebft k\u1ebf c\u1ee7a m\u00ecnh c\u00f3 t\u1ed1t kh\u00f4ng? H\u00e3y s\u1eed d\u1ee5ng danh s\u00e1ch ki\u1ec3m tra sau \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00f4ng vi\u1ec7c c\u1ee7a b\u1ea1n m\u1ed9t c\u00e1ch kh\u00e1ch quan.<\/p>\n

                  \n
                • T\u00ednh g\u1eafn k\u1ebft:<\/strong> M\u1ed7i l\u1edbp c\u00f3 m\u1ed9t m\u1ee5c \u0111\u00edch duy nh\u1ea5t v\u00e0 r\u00f5 r\u00e0ng kh\u00f4ng? N\u1ebfu m\u1ed9t l\u1edbp th\u1ef1c hi\u1ec7n qu\u00e1 nhi\u1ec1u vi\u1ec7c, th\u00ec n\u00f3 c\u00f3 \u0111\u1ed9 g\u1eafn k\u1ebft th\u1ea5p.<\/li>\n
                • T\u00ednh li\u00ean k\u1ebft:<\/strong> C\u00e1c l\u1edbp c\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o chi ti\u1ebft tri\u1ec3n khai n\u1ed9i b\u1ed9 c\u1ee7a nhau kh\u00f4ng? Li\u00ean k\u1ebft cao khi\u1ebfn vi\u1ec7c thay \u0111\u1ed5i tr\u1edf n\u00ean kh\u00f3 kh\u0103n. H\u00e3y h\u01b0\u1edbng \u0111\u1ebfn li\u00ean k\u1ebft th\u1ea5p.<\/li>\n
                • Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng:<\/strong> Thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 x\u1eed l\u00fd th\u00eam d\u1eef li\u1ec7u ho\u1eb7c ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i s\u1eeda \u0111\u1ed5i l\u1edbn kh\u00f4ng? H\u00e3y t\u00ecm c\u00e1c \u0111i\u1ec3m ngh\u1ebdn trong c\u1ea5u tr\u00fac d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/li>\n
                • Kh\u1ea3 n\u0103ng ki\u1ec3m th\u1eed:<\/strong> B\u1ea1n c\u00f3 th\u1ec3 vi\u1ebft c\u00e1c b\u00e0i ki\u1ec3m th\u1eed \u0111\u01a1n v\u1ecb cho t\u1eebng l\u1edbp m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp kh\u00f4ng? N\u1ebfu m\u1ed9t l\u1edbp c\u1ea7n k\u1ebft n\u1ed1i c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 kh\u1edfi t\u1ea1o, th\u00ec n\u00f3 r\u1ea5t kh\u00f3 ki\u1ec3m th\u1eed.<\/li>\n
                • Kh\u1ea3 n\u0103ng \u0111\u1ecdc hi\u1ec3u:<\/strong> M\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n kh\u00e1c c\u00f3 th\u1ec3 hi\u1ec3u lu\u1ed3ng ho\u1ea1t \u0111\u1ed9ng trong v\u00f2ng 5 ph\u00fat kh\u00f4ng? T\u00ean g\u1ecdi r\u00f5 r\u00e0ng v\u00e0 c\u1ea5u tr\u00fac t\u1ed1t l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng.<\/li>\n<\/ul>\n

                  Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn khi m\u00f4 h\u00ecnh h\u00f3a \u26a0\ufe0f<\/h2>\n

                  Ngay c\u1ea3 nh\u1eefng nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng li\u1ec7t k\u00ea nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c ch\u00fang.<\/p>\n\n\n\n\n\n\n
                  Sai l\u1ea7m<\/th>\nM\u00f4 t\u1ea3<\/th>\nChi\u1ebfn l\u01b0\u1ee3c kh\u1eafc ph\u1ee5c<\/th>\n<\/tr>\n
                  \u0110\u1ed1i t\u01b0\u1ee3ng th\u1ea7n th\u00e1nh<\/td>\nM\u1ed9t l\u1edbp bi\u1ebft m\u1ecdi th\u1ee9 v\u00e0 l\u00e0m m\u1ecdi th\u1ee9.<\/td>\nChia nh\u1ecf tr\u00e1ch nhi\u1ec7m th\u00e0nh c\u00e1c l\u1edbp nh\u1ecf, t\u1eadp trung h\u01a1n.<\/td>\n<\/tr>\n
                  K\u1ebf th\u1eeba s\u00e2u<\/td>\nT\u1ea1o c\u00e1c c\u1ea5u tr\u00fac k\u1ebf th\u1eeba qu\u00e1 s\u00e2u (nhi\u1ec1u h\u01a1n 3 c\u1ea5p).<\/td>\n\u01afu ti\u00ean k\u1ebft h\u1ee3p (composition) h\u01a1n l\u00e0 k\u1ebf th\u1eeba. S\u1eed d\u1ee5ng giao di\u1ec7n \u0111\u1ec3 chia s\u1ebb h\u00e0nh vi.<\/td>\n<\/tr>\n
                  S\u1ef1 lan r\u1ed9ng t\u00ednh n\u0103ng<\/td>\nTh\u00eam c\u00e1c t\u00ednh n\u0103ng v\u00e0o m\u1ed9t l\u1edbp m\u00e0 ch\u00fang kh\u00f4ng thu\u1ed9c v\u1ec1.<\/td>\nXem l\u1ea1i Nguy\u00ean t\u1eafc tr\u00e1ch nhi\u1ec7m duy nh\u1ea5t. Chuy\u1ec3n logic sang c\u00e1c qu\u1ea3n l\u00fd ph\u00f9 h\u1ee3p.<\/td>\n<\/tr>\n
                  Li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd<\/td>\nC\u00e1c l\u1edbp ph\u1ee5 thu\u1ed9c v\u00e0o tri\u1ec3n khai c\u1ee5 th\u1ec3 thay v\u00ec tr\u1eebu t\u01b0\u1ee3ng.<\/td>\nPh\u1ee5 thu\u1ed9c v\u00e0o giao di\u1ec7n ho\u1eb7c c\u00e1c l\u1edbp c\u01a1 s\u1edf tr\u1eebu t\u01b0\u1ee3ng.<\/td>\n<\/tr>\n<\/table>\n

                  Quy tr\u00ecnh tinh ch\u1ec9nh l\u1eb7p l\u1ea1i \ud83d\udd01<\/h2>\n

                  Thi\u1ebft k\u1ebf hi\u1ebfm khi ho\u00e0n h\u1ea3o ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean. Quy tr\u00ecnh Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 l\u1eb7p l\u1ea1i. B\u1ea1n ph\u1ea3i s\u1eb5n s\u00e0ng xem x\u00e9t l\u1ea1i m\u00f4 h\u00ecnh c\u1ee7a m\u00ecnh khi y\u00eau c\u1ea7u thay \u0111\u1ed5i.<\/p>\n

                    \n
                  • Xem x\u00e9t th\u01b0\u1eddng xuy\u00ean:<\/strong>L\u00ean l\u1ecbch xem x\u00e9t thi\u1ebft k\u1ebf v\u1edbi \u0111\u1ed3ng nghi\u1ec7p. Nh\u1eefng \u0111\u00f4i m\u1eaft m\u1edbi s\u1ebd ph\u00e1t hi\u1ec7n nh\u1eefng v\u1ea5n \u0111\u1ec1 b\u1ea1n c\u00f3 th\u1ec3 b\u1ecf s\u00f3t.<\/li>\n
                  • T\u00e1i c\u1ea5u tr\u00fac li\u00ean t\u1ee5c:<\/strong> N\u1ebfu b\u1ea1n th\u1ea5y m\u00ecnh th\u01b0\u1eddng xuy\u00ean thay \u0111\u1ed5i m\u1ed9t l\u1edbp \u0111\u1ec3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u m\u1edbi, thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 \u0111ang c\u00f3 v\u1ea5n \u0111\u1ec1.<\/li>\n
                  • T\u00e0i li\u1ec7u h\u00f3a c\u00e1c quy\u1ebft \u0111\u1ecbnh:<\/strong> L\u01b0u l\u1ea1i l\u00fd do t\u1ea1i sao b\u1ea1n ch\u1ecdn m\u1ed9t m\u1eabu c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n t\u01b0\u01a1ng lai hi\u1ec3u \u0111\u01b0\u1ee3c b\u1ed1i c\u1ea3nh.<\/li>\n
                  • X\u00e1c minh theo y\u00eau c\u1ea7u:<\/strong> \u0110\u1ea3m b\u1ea3o m\u1ecdi l\u1edbp v\u00e0 m\u1ed1i quan h\u1ec7 \u0111\u1ec1u ph\u1ee5c v\u1ee5 nhu c\u1ea7u kinh doanh, ch\u1ee9 kh\u00f4ng ch\u1ec9 l\u00e0 s\u1edf th\u00edch k\u1ef9 thu\u1eadt.<\/li>\n<\/ul>\n

                    \u1ee8ng d\u1ee5ng m\u1eabu n\u00e2ng cao trong c\u00e1c t\u00ecnh hu\u1ed1ng \ud83e\udde9<\/h2>\n

                    C\u00e1c m\u1eabu thi\u1ebft k\u1ebf c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 l\u1eb7p l\u1ea1i trong nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y. Vi\u1ec7c \u00e1p d\u1ee5ng ch\u00fang \u0111\u00fang c\u00e1ch th\u1ec3 hi\u1ec7n s\u1ef1 th\u00e0nh th\u1ea1o trong qu\u00e1 tr\u00ecnh t\u01b0 duy thi\u1ebft k\u1ebf.<\/p>\n

                    M\u1eabu Factory<\/h3>\n

                    Trong t\u00ecnh hu\u1ed1ng Kho h\u00e0ng, vi\u1ec7c t\u1ea1o ra c\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m kh\u00e1c nhau (D\u1ec5 v\u1ee1, Chu\u1ea9n) c\u00f3 th\u1ec3 y\u00eau c\u1ea7u logic kh\u00e1c nhau. M\u1ed9t l\u1edbp Factory c\u00f3 th\u1ec3 \u0111\u00f3ng g\u00f3i quy tr\u00ecnh t\u1ea1o, gi\u00fap m\u00e3 kh\u00e1ch h\u00e0ng lu\u00f4n s\u1ea1ch s\u1ebd.<\/p>\n

                    M\u1eabu Quan s\u00e1t vi\u00ean<\/h3>\n

                    Trong t\u00ecnh hu\u1ed1ng IoT, B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n c\u1ea7n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt m\u1ed7i khi thi\u1ebft b\u1ecb g\u1eedi d\u1eef li\u1ec7u m\u1edbi. M\u1eabu Quan s\u00e1t vi\u00ean cho ph\u00e9p Thi\u1ebft b\u1ecb th\u00f4ng b\u00e1o cho B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u00e0 kh\u00f4ng c\u1ea7n Thi\u1ebft b\u1ecb bi\u1ebft v\u1ec1 B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n

                    M\u1eabu Chi\u1ebfn l\u01b0\u1ee3c<\/h3>\n

                    Trong t\u00ecnh hu\u1ed1ng Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, chi ph\u00ed v\u1eadn chuy\u1ec3n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh kh\u00e1c nhau t\u00f9y theo v\u1ecb tr\u00ed. Giao di\u1ec7n ShippingStrategy cho ph\u00e9p b\u1ea1n thay \u0111\u1ed5i thu\u1eadt to\u00e1n t\u00ednh to\u00e1n m\u00e0 kh\u00f4ng c\u1ea7n thay \u0111\u1ed5i l\u1edbp Order.<\/p>\n

                    X\u00e2y d\u1ef1ng m\u1ed9t m\u00f4 h\u00ecnh tinh th\u1ea7n v\u1eefng ch\u1eafc \ud83e\udde0<\/h2>\n

                    Cu\u1ed1i c\u00f9ng, m\u1ee5c ti\u00eau c\u1ee7a nh\u1eefng b\u00e0i t\u1eadp n\u00e0y l\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t m\u00f4 h\u00ecnh tinh th\u1ea7n c\u00f3 th\u1ec3 chuy\u1ec3n h\u00f3a m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean th\u00e0nh m\u00e3 ngu\u1ed3n. Khi b\u1ea1n nh\u00ecn th\u1ea5y m\u1ed9t y\u00eau c\u1ea7u, b\u1ea1n n\u00ean t\u1ef1 nhi\u00ean suy ngh\u0129 v\u1ec1 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0 s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa ch\u00fang.<\/p>\n

                      \n
                    • Suy ngh\u0129 theo danh t\u1eeb v\u00e0 \u0111\u1ed9ng t\u1eeb:<\/strong> Danh t\u1eeb tr\u1edf th\u00e0nh l\u1edbp; \u0111\u1ed9ng t\u1eeb tr\u1edf th\u00e0nh ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n
                    • H\u1ecfi v\u1ec1 m\u1ed1i quan h\u1ec7:<\/strong> H\u1ecfi: \u201c\u0110\u1ed1i t\u01b0\u1ee3ng n\u00e0y c\u00f3 c\u1ea7n bi\u1ebft \u0111\u1ebfn \u0111\u1ed1i t\u01b0\u1ee3ng kia kh\u00f4ng?\u201d N\u1ebfu c\u00e2u tr\u1ea3 l\u1eddi l\u00e0 \u201ckh\u00f4ng\u201d, h\u00e3y lo\u1ea1i b\u1ecf li\u00ean k\u1ebft \u0111\u00f3.<\/li>\n
                    • T\u1eadp trung v\u00e0o h\u00e0nh vi:<\/strong> L\u1edbp kh\u00f4ng ch\u1ec9 l\u00e0 n\u01a1i ch\u1ee9a d\u1eef li\u1ec7u. Ch\u00fang l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n t\u00edch c\u1ef1c trong h\u1ec7 th\u1ed1ng.<\/li>\n
                    • Gi\u1eef \u0111\u01a1n gi\u1ea3n:<\/strong> S\u1ef1 ph\u1ee9c t\u1ea1p l\u00e0 k\u1ebb th\u00f9 c\u1ee7a kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec. N\u1ebfu m\u1ed9t thi\u1ebft k\u1ebf c\u1ea3m gi\u00e1c qu\u00e1 ph\u1ee9c t\u1ea1p, h\u00e3y \u0111\u01a1n gi\u1ea3n h\u00f3a n\u00f3.<\/li>\n<\/ul>\n

                      B\u1eb1ng c\u00e1ch luy\u1ec7n t\u1eadp \u0111\u1ec1u \u0111\u1eb7n v\u1edbi nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y, b\u1ea1n ph\u00e1t tri\u1ec3n tr\u1ef1c gi\u00e1c c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra c\u00e1c h\u1ec7 th\u1ed1ng v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian. Tr\u1ecdng t\u00e2m v\u1eabn l\u00e0 c\u1ea5u tr\u00fac, s\u1ef1 r\u00f5 r\u00e0ng v\u00e0 kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng thay v\u00ec t\u1ed1c \u0111\u1ed9 tri\u1ec3n khai. C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 k\u1ef7 lu\u1eadt n\u00e0y \u0111\u1ea3m b\u1ea3o ph\u1ea7n m\u1ec1m b\u1ea1n x\u00e2y d\u1ef1ng l\u00e0 n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc cho s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai.<\/p>\n","protected":false},"excerpt":{"rendered":"

                      X\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m m\u1ea1nh m\u1ebd \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c vi\u1ebft m\u00e3. N\u00f3 \u0111\u00f2i h\u1ecfi m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 hi\u1ec3u v\u1ea5n \u0111\u1ec1 v\u00e0 t\u1ed5 ch\u1ee9c…<\/p>\n","protected":false},"author":1,"featured_media":70,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"T\u00ecnh hu\u1ed1ng OOAD & B\u00e0i t\u1eadp thi\u1ebft k\u1ebf: H\u01b0\u1edbng d\u1eabn th\u1ef1c h\u00e0nh","_yoast_wpseo_metadesc":"Kh\u00e1m ph\u00e1 c\u00e1c t\u00ecnh hu\u1ed1ng OOAD th\u1ef1c t\u1ebf v\u00e0 c\u00e1c b\u00e0i t\u1eadp t\u01b0 duy thi\u1ebft k\u1ebf. 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