{"id":124,"date":"2026-04-06T16:32:24","date_gmt":"2026-04-06T16:32:24","guid":{"rendered":"https:\/\/www.hi-posts.com\/vn\/myth-busting-object-oriented-analysis-design\/"},"modified":"2026-04-06T16:32:24","modified_gmt":"2026-04-06T16:32:24","slug":"myth-busting-object-oriented-analysis-design","status":"publish","type":"post","link":"https:\/\/www.hi-posts.com\/vn\/myth-busting-object-oriented-analysis-design\/","title":{"rendered":"Ph\u00e1 v\u1ee1 Nh\u1eefng Suy Ngh\u0129 Sai L\u1ea7m V\u1ec1 Ph\u00e2n T\u00edch V\u00e0 Thi\u1ebft K\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng: Ph\u00e2n Bi\u1ec7t Suy T\u01b0\u1edfng V\u1edbi Th\u1ef1c T\u1ebf Cho C\u00e1c L\u1eadp Tr\u00ecnh Vi\u00ean M\u1edbi"},"content":{"rendered":"<p>V\u00e0o th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m th\u01b0\u1eddng c\u1ea3m gi\u00e1c nh\u01b0 b\u01b0\u1edbc v\u00e0o m\u1ed9t khu r\u1eebng r\u1eadm r\u1ea1p m\u00e0 kh\u00f4ng c\u00f3 b\u1ea3n \u0111\u1ed3. Trong s\u1ed1 r\u1ea5t nhi\u1ec1u con \u0111\u01b0\u1eddng, Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng (OOAD) n\u1ed5i b\u1eadt nh\u01b0 m\u1ed9t con \u0111\u01b0\u1eddng \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i nhi\u1ec1u, nh\u01b0ng v\u1eabn b\u1ecb bao quanh b\u1edfi s\u1ef1 hi\u1ec3u l\u1ea7m \u0111\u00e1ng k\u1ec3. Nhi\u1ec1u l\u1eadp tr\u00ecnh vi\u00ean m\u1edbi ti\u1ebfp c\u1eadn OOAD v\u1edbi s\u1ef1 t\u00f2 m\u00f2 v\u00e0 lo l\u1eafng, th\u01b0\u1eddng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nh\u1eefng l\u1eddi tuy\u00ean b\u1ed1 qu\u00e1 m\u1ee9c v\u1ec1 t\u00ednh c\u1ea7n thi\u1ebft v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a n\u00f3. C\u1ea9m nang n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch lo\u1ea1i b\u1ecf nh\u1eefng ti\u1ebfng \u1ed3n. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c c\u01a1 ch\u1ebf th\u1ef1c t\u1ebf c\u1ee7a OOAD, ph\u00e2n bi\u1ec7t s\u1ef1 th\u1eadt v\u1edbi h\u01b0 c\u1ea5u, v\u00e0 cung c\u1ea5p g\u00f3c nh\u00ecn th\u1ef1c t\u1ebf cho nh\u1eefng ng\u01b0\u1eddi \u0111ang x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng v\u1eefng ch\u1eafc \u0111\u1ea7u ti\u00ean c\u1ee7a m\u00ecnh.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Sketch-style infographic debunking four common myths about Object-Oriented Analysis and Design for new developers, illustrating the difference between analysis (what the system does) and design (how it's built), core principles including encapsulation, inheritance, polymorphism, and coupling\/cohesion, common pitfalls like over-engineering and diagram overload, and guidance on when to apply OOAD methodology versus simpler approaches\" decoding=\"async\" src=\"https:\/\/www.hi-posts.com\/wp-content\/uploads\/2026\/04\/ooad-myth-busting-infographic-sketch.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83c\udfd7\ufe0f Hi\u1ec3u R\u00f5 N\u1ec1n T\u1ea3ng<\/h2>\n<p>Tr\u01b0\u1edbc khi b\u00e1c b\u1ecf nh\u1eefng hi\u1ec3u l\u1ea7m, \u0111i\u1ec1u thi\u1ebft y\u1ebfu l\u00e0 ph\u1ea3i x\u00e1c \u0111\u1ecbnh r\u00f5 ch\u00fang ta \u0111ang n\u00f3i v\u1ec1 \u0111i\u1ec1u g\u00ec. Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0110\u1ed1i T\u01b0\u1ee3ng l\u00e0 m\u1ed9t quy tr\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a v\u00e0 x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m. N\u00f3 t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng, thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi c\u1ee7a ch\u00fang. M\u1ee5c ti\u00eau l\u00e0 t\u1ea1o ra m\u1ed9t c\u1ea5u tr\u00fac ph\u1ea3n \u00e1nh mi\u1ec1n v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch g\u1ea7n nh\u1ea5t c\u00f3 th\u1ec3.<\/p>\n<p>C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 vi\u1ebft m\u00e3. \u0110\u00f3 l\u00e0 v\u1ec1 t\u01b0 duy. N\u00f3 bao g\u1ed3m vi\u1ec7c chia nh\u1ecf c\u00e1c y\u00eau c\u1ea7u ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c th\u00e0nh ph\u1ea7n d\u1ec5 qu\u1ea3n l\u00fd. Khi \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u00fang c\u00e1ch, h\u1ec7 th\u1ed1ng k\u1ebft qu\u1ea3 s\u1ebd d\u1ec5 b\u1ea3o tr\u00ec, m\u1edf r\u1ed9ng v\u00e0 hi\u1ec3u h\u01a1n. Tuy nhi\u00ean, l\u1ee3i \u00edch n\u00e0y kh\u00f4ng t\u1ef1 \u0111\u1ed9ng x\u1ea3y ra. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt v\u00e0 hi\u1ec3u r\u00f5 c\u00e1c nguy\u00ean t\u1eafc li\u00ean quan.<\/p>\n<p>\u0110\u1ed1i v\u1edbi m\u1ed9t l\u1eadp tr\u00ecnh vi\u00ean m\u1edbi, b\u01b0\u1edbc chuy\u1ec3n t\u1eeb vi\u1ebft script sang thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 khi\u1ebfn ng\u01b0\u1eddi ta lo l\u1eafng. Ngay c\u1ea3 t\u1eeb ng\u1eef chuy\u00ean m\u00f4n\u2014bao \u0111\u00f3ng, k\u1ebf th\u1eeba, \u0111a h\u00ecnh\u2014\u0111\u00e3 c\u00f3 th\u1ec3 khi\u1ebfn ng\u01b0\u1eddi ta c\u1ea3m th\u1ea5y \u0111\u00e1ng s\u1ee3. Tuy nhi\u00ean, ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng l\u1eddi nguy\u1ec1n huy\u1ec1n b\u00ed. Ch\u00fang l\u00e0 c\u00f4ng c\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 t\u1ed5 ch\u1ee9c logic. Th\u1ef1c t\u1ebf l\u00e0 OOAD l\u00e0 m\u1ed9t khung \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u1ee9c t\u1ea1p, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c cho t\u1eebng d\u00f2ng m\u00e3 \u0111\u01b0\u1ee3c vi\u1ebft ra.<\/p>\n<h2>\ud83d\udd75\ufe0f\u200d\u2642\ufe0f B\u1ed1n Suy Ngh\u0129 Sai L\u1ea7m L\u1edbn V\u1ec1 OOAD<\/h2>\n<p>M\u1ed9t s\u1ed1 ni\u1ec1m tin dai d\u1eb3ng lan truy\u1ec1n trong c\u1ed9ng \u0111\u1ed3ng l\u1eadp tr\u00ecnh vi\u00ean v\u1ec1 l\u0129nh v\u1ef1c n\u00e0y. Nh\u1eefng hi\u1ec3u l\u1ea7m n\u00e0y th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn vi\u1ec7c l\u00e3ng ph\u00ed c\u00f4ng s\u1ee9c ho\u1eb7c lo l\u1eafng kh\u00f4ng c\u1ea7n thi\u1ebft. H\u00e3y c\u00f9ng xem x\u00e9t nh\u1eefng tuy\u00ean b\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00e0 \u0111\u1ed1i chi\u1ebfu ch\u00fang v\u1edbi th\u1ef1c t\u1ebf th\u1ef1c ti\u1ec5n.<\/p>\n<table>\n<thead>\n<tr>\n<th>Suy Ngh\u0129 Sai L\u1ea7m<\/th>\n<th>Th\u1ef1c T\u1ebf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ed7i l\u1edbp \u0111\u1ec1u ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/td>\n<td>Kh\u00f4ng ph\u1ea3i m\u1ecdi th\u1ef1c th\u1ec3 logic n\u00e0o c\u0169ng c\u1ea7n c\u00f3 m\u1ed9t l\u1edbp. \u0110\u00f4i khi m\u1ed9t h\u00e0m ho\u1eb7c m\u1ed9t c\u1ea5u tr\u00fac d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n s\u1ebd ph\u00f9 h\u1ee3p h\u01a1n.<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft k\u1ebf ph\u1ea3i ho\u00e0n t\u1ea5t tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u vi\u1ebft m\u00e3.<\/td>\n<td>Thi\u1ebft k\u1ebf l\u00e0 qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. N\u00f3 ph\u00e1t tri\u1ec3n song song v\u1edbi m\u00e3 ngu\u1ed3n th\u00f4ng qua vi\u1ec7c tinh ch\u1ec9nh v\u00e0 ph\u1ea3n h\u1ed3i.<\/td>\n<\/tr>\n<tr>\n<td>S\u01a1 \u0111\u1ed3 ph\u1ee9c t\u1ea1p \u0111\u1ed3ng ngh\u0129a v\u1edbi thi\u1ebft k\u1ebf t\u1ed1t.<\/td>\n<td>S\u1ef1 r\u00f5 r\u00e0ng l\u00e0 then ch\u1ed1t. M\u1ed9t s\u01a1 \u0111\u1ed3 l\u1ed9n x\u1ed9n kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 h\u1ec7 th\u1ed1ng l\u1ed9n x\u1ed9n, nh\u01b0ng m\u1ed9t s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng s\u1ebd gi\u00fap giao ti\u1ebfp t\u1ed1t h\u01a1n.<\/td>\n<\/tr>\n<tr>\n<td>OOAD ch\u1ec9 d\u00e0nh cho c\u00e1c nh\u00f3m l\u1edbn.<\/td>\n<td>L\u1eadp tr\u00ecnh vi\u00ean \u0111\u1ed9c l\u1eadp c\u0169ng \u0111\u01b0\u1ee3c l\u1ee3i t\u1eeb c\u1ea5u tr\u00fac nh\u01b0 c\u00e1c nh\u00f3m l\u1edbn \u0111\u1ec3 tr\u00e1nh n\u1ee3 k\u1ef9 thu\u1eadt.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Hi\u1ec3u r\u00f5 nh\u1eefng s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y gi\u00fap \u00e1p d\u1ee5ng m\u1ee9c \u0111\u1ed9 nghi\u00eam t\u00fac ph\u00f9 h\u1ee3p cho m\u1ed9t d\u1ef1 \u00e1n. Vi\u1ec7c thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c cho m\u1ed9t script nh\u1ecf l\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn. Vi\u1ec7c thi\u1ebft k\u1ebf qu\u00e1 s\u01a1 s\u00e0i cho m\u1ed9t n\u1ec1n t\u1ea3ng l\u1edbn c\u0169ng l\u00e0 m\u1ed9t sai l\u1ea7m kh\u00e1c. S\u1ef1 c\u00e2n b\u1eb1ng n\u1eb1m \u1edf vi\u1ec7c hi\u1ec3u r\u00f5 quy m\u00f4 v\u00e0 th\u1eddi gian s\u1ed1ng c\u1ee7a ph\u1ea7n m\u1ec1m.<\/p>\n<h2>\ud83e\uddd0 Ph\u00e2n T\u00edch So V\u1edbi Thi\u1ebft K\u1ebf: N\u01a1i G\u00e2y Ra S\u1ef1 Nh\u1ea7m L\u1eabn<\/h2>\n<p>M\u1ed9t ngu\u1ed3n hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 s\u1ef1 ph\u00e2n bi\u1ec7t gi\u1eefa Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf. M\u1eb7c d\u00f9 ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u00f3m l\u1ea1i v\u1edbi nhau, nh\u01b0ng ch\u00fang c\u00f3 nh\u1eefng m\u1ee5c \u0111\u00edch kh\u00e1c nhau trong v\u00f2ng \u0111\u1eddi ph\u00e1t tri\u1ec3n ph\u1ea7n m\u1ec1m.<\/p>\n<h3>\ud83d\udccb Giai \u0110o\u1ea1n Ph\u00e2n T\u00edch<\/h3>\n<p>Ph\u00e2n t\u00edch quan t\u00e2m \u0111\u1ebfn <strong>\u0111i\u1ec1u g\u00ec<\/strong> h\u1ec7 th\u1ed1ng c\u1ea7n l\u00e0m g\u00ec. N\u00f3 \u0111\u1ed9c l\u1eadp v\u1edbi c\u00f4ng ngh\u1ec7. Trong giai \u0111o\u1ea1n n\u00e0y, b\u1ea1n thu th\u1eadp y\u00eau c\u1ea7u v\u00e0 m\u00f4 h\u00ecnh h\u00f3a mi\u1ec1n v\u1ea5n \u0111\u1ec1. B\u1ea1n x\u00e1c \u0111\u1ecbnh c\u00e1c danh t\u1eeb (th\u1ef1c th\u1ec3) v\u00e0 \u0111\u1ed9ng t\u1eeb (h\u00e0nh \u0111\u1ed9ng) trong kh\u00f4ng gian v\u1ea5n \u0111\u1ec1.<\/p>\n<ul>\n<li><strong>M\u1ee5c ti\u00eau:<\/strong> X\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c ph\u1ea1m vi v\u1ea5n \u0111\u1ec1.<\/li>\n<li><strong>K\u1ebft qu\u1ea3 \u0111\u1ea7u ra:<\/strong> C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng, m\u00f4 h\u00ecnh mi\u1ec1n v\u00e0 t\u00e0i li\u1ec7u y\u00eau c\u1ea7u.<\/li>\n<li><strong>C\u00e2u h\u1ecfi then ch\u1ed1t:<\/strong> \u201cNg\u01b0\u1eddi d\u00f9ng c\u1ea7n g\u00ec?\u201d<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n \u0111ang x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng th\u01b0 vi\u1ec7n, giai \u0111o\u1ea1n ph\u00e2n t\u00edch bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c cu\u1ed1n s\u00e1ch, th\u00e0nh vi\u00ean v\u00e0 c\u00e1c giao d\u1ecbch m\u01b0\u1ee3n s\u00e1ch. N\u00f3 kh\u00f4ng quy\u1ebft \u0111\u1ecbnh xem cu\u1ed1n s\u00e1ch c\u00f3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u01a1 s\u1edf d\u1eef li\u1ec7u hay trong m\u1ed9t t\u1ec7p v\u0103n b\u1ea3n. Quy\u1ebft \u0111\u1ecbnh \u0111\u00f3 thu\u1ed9c v\u1ec1 giai \u0111o\u1ea1n thi\u1ebft k\u1ebf.<\/p>\n<h3>\ud83d\udee0\ufe0f Giai \u0111o\u1ea1n Thi\u1ebft k\u1ebf<\/h3>\n<p>Thi\u1ebft k\u1ebf chuy\u1ec3n tr\u1ecdng t\u00e2m sang<strong>l\u00e0m th\u1ebf n\u00e0o<\/strong>h\u1ec7 th\u1ed1ng s\u1ebd \u0111\u1ea1t \u0111\u01b0\u1ee3c nh\u1eefng m\u1ee5c ti\u00eau \u0111\u00f3. \u0110\u00e2y l\u00e0 n\u01a1i c\u00e1c l\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7, ki\u1ebfn tr\u00fac v\u00e0 chi ti\u1ebft tri\u1ec3n khai \u0111\u01b0\u1ee3c \u0111\u01b0a ra. B\u1ea1n chuy\u1ec3n \u0111\u1ed5i c\u00e1c m\u00f4 h\u00ecnh ph\u00e2n t\u00edch th\u00e0nh b\u1ea3n thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt.<\/p>\n<ul>\n<li><strong>M\u1ee5c ti\u00eau:<\/strong>T\u1ea1o b\u1ea3n thi\u1ebft k\u1ebf cho vi\u1ec7c tri\u1ec3n khai.<\/li>\n<li><strong>K\u1ebft qu\u1ea3:<\/strong>S\u01a1 \u0111\u1ed3 l\u1edbp, s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 v\u00e0 \u0111\u1ecbnh ngh\u0129a giao di\u1ec7n.<\/li>\n<li><strong>C\u00e2u h\u1ecfi then ch\u1ed1t:<\/strong> \u201cCh\u00fang ta s\u1ebd x\u00e2y d\u1ef1ng n\u00f3 nh\u01b0 th\u1ebf n\u00e0o?\u201d<\/li>\n<\/ul>\n<p>Ti\u1ebfp t\u1ee5c v\u00ed d\u1ee5 v\u1ec1 th\u01b0 vi\u1ec7n, thi\u1ebft k\u1ebf quy\u1ebft \u0111\u1ecbnh c\u00e1ch l\u1edbp \u201cS\u00e1ch\u201d t\u01b0\u01a1ng t\u00e1c v\u1edbi l\u1edbp \u201cC\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d. N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t. \u0110\u00e2y ch\u00ednh l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u00e1c y\u00eau c\u1ea7u tr\u1eebu t\u01b0\u1ee3ng v\u00e0 m\u00e3 ngu\u1ed3n c\u1ee5 th\u1ec3.<\/p>\n<h2>\ud83e\uddf1 C\u00e1c nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i m\u00e0 kh\u00f4ng c\u1ea7n l\u1eddi hoa m\u1ef9<\/h2>\n<p>C\u00f3 nh\u1eefng kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng l\u00e0m n\u1ec1n t\u1ea3ng cho c\u00f4ng vi\u1ec7c h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng th\u00e0nh c\u00f4ng. B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ea3i ghi nh\u1edb m\u1ecdi ch\u1eef vi\u1ebft t\u1eaft, nh\u01b0ng vi\u1ec7c hi\u1ec3u \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch \u0111\u1eb1ng sau nh\u1eefng nguy\u00ean t\u1eafc n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n<h3>1. Bao \u0111\u00f3ng<\/h3>\n<p>Bao \u0111\u00f3ng l\u00e0 v\u1ec1 vi\u1ec7c che gi\u1ea5u c\u00e1c chi ti\u1ebft b\u00ean trong. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp v\u00e0o d\u1eef li\u1ec7u c\u1ee7a ch\u00ednh n\u00f3. \u0110i\u1ec1u n\u00e0y ng\u0103n c\u1ea3n m\u00e3 b\u00ean ngo\u00e0i ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c chi ti\u1ebft tri\u1ec3n khai b\u00ean trong c\u00f3 th\u1ec3 thay \u0111\u1ed5i. B\u1eb1ng c\u00e1ch gi\u1edbi h\u1ea1n quy\u1ec1n truy c\u1eadp, b\u1ea1n b\u1ea3o v\u1ec7 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n<ul>\n<li><strong>L\u1ee3i \u00edch:<\/strong>Gi\u1ea3m thi\u1ec3u c\u00e1c t\u00e1c \u0111\u1ed9ng ph\u1ee5 kh\u00f4ng mong mu\u1ed1n.<\/li>\n<li><strong>Th\u1ef1c h\u00e0nh:<\/strong>S\u1eed d\u1ee5ng c\u00e1c tr\u01b0\u1eddng ri\u00eang t\u01b0 v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u00f4ng khai \u0111\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<h3>2. K\u1ebf th\u1eeba<\/h3>\n<p>K\u1ebf th\u1eeba cho ph\u00e9p m\u1ed9t l\u1edbp k\u1ebf th\u1eeba thu\u1ed9c t\u00ednh v\u00e0 h\u00e0nh vi t\u1eeb m\u1ed9t l\u1edbp kh\u00e1c. \u0110i\u1ec1u n\u00e0y th\u00fac \u0111\u1ea9y vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng m\u00e3 ngu\u1ed3n. Tuy nhi\u00ean, n\u00f3 th\u01b0\u1eddng b\u1ecb l\u1ea1m d\u1ee5ng. C\u00e1c c\u1ea5u tr\u00fac k\u1ebf th\u1eeba s\u00e2u c\u00f3 th\u1ec3 tr\u1edf n\u00ean mong manh v\u00e0 kh\u00f3 hi\u1ec3u.<\/p>\n<ul>\n<li><strong>L\u1ee3i \u00edch:<\/strong>Gi\u1ea3m thi\u1ec3u vi\u1ec7c tr\u00f9ng l\u1eb7p logic chung.<\/li>\n<li><strong>Th\u1ef1c h\u00e0nh:<\/strong>Ch\u1ec9 s\u1eed d\u1ee5ng k\u1ebf th\u1eeba khi c\u00f3 m\u1ed1i quan h\u1ec7 \u201cl\u00e0 m\u1ed9t\u201d r\u00f5 r\u00e0ng. \u01afu ti\u00ean s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p khi c\u00f3 th\u1ec3.<\/li>\n<\/ul>\n<h3>3. \u0110a h\u00ecnh<\/h3>\n<p>\u0110a h\u00ecnh cho ph\u00e9p c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ec3 ch\u00fang l\u00e0 c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp cha thay v\u00ec l\u1edbp th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra s\u1ef1 linh ho\u1ea1t trong c\u00e1ch m\u00e3 ngu\u1ed3n t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c ki\u1ec3u kh\u00e1c nhau. N\u00f3 cho ph\u00e9p b\u1ea1n vi\u1ebft m\u00e3 t\u1ed5ng qu\u00e1t c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3.<\/p>\n<ul>\n<li><strong>L\u1ee3i \u00edch:<\/strong> T\u0103ng t\u00ednh linh ho\u1ea1t v\u00e0 gi\u1ea3m s\u1ef1 ph\u1ee5 thu\u1ed9c.<\/li>\n<li><strong>Th\u1ef1c h\u00e0nh:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c giao di\u1ec7n ho\u1eb7c l\u1edbp tr\u1eebu t\u01b0\u1ee3ng m\u00e0 c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3 tu\u00e2n theo.<\/li>\n<\/ul>\n<h3>4. S\u1ef1 ph\u1ee5 thu\u1ed9c v\u00e0 t\u00ednh g\u1eafn k\u1ebft<\/h3>\n<p>Hai kh\u00e1i ni\u1ec7m n\u00e0y l\u00e0 nh\u1ecbp \u0111\u1eadp c\u1ee7a thi\u1ebft k\u1ebf t\u1ed1t.<strong>S\u1ef1 ph\u1ee5 thu\u1ed9c<\/strong> ch\u1ec9 ra m\u1ee9c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c c\u1ee7a m\u1ed9t module v\u00e0o module kh\u00e1c. S\u1ef1 ph\u1ee5 thu\u1ed9c th\u1ea5p l\u00e0 mong mu\u1ed1n.<strong>T\u00ednh g\u1eafn k\u1ebft<\/strong> ch\u1ec9 ra m\u1ee9c \u0111\u1ed9 li\u00ean quan m\u1eadt thi\u1ebft gi\u1eefa c\u00e1c tr\u00e1ch nhi\u1ec7m c\u1ee7a m\u1ed9t module duy nh\u1ea5t. T\u00ednh g\u1eafn k\u1ebft cao l\u00e0 mong mu\u1ed1n.<\/p>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t module x\u1eed l\u00fd \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng, g\u1eedi email, c\u1eadp nh\u1eadt c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 ghi nh\u1eadt k\u00fd l\u1ed7i. \u0110\u00e2y l\u00e0 s\u1ef1 ph\u1ee5 thu\u1ed9c cao v\u00e0 t\u00ednh g\u1eafn k\u1ebft th\u1ea5p. R\u1ea5t kh\u00f3 \u0111\u1ec3 thay \u0111\u1ed5i d\u1ecbch v\u1ee5 email m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng logic \u0111\u0103ng nh\u1eadp. M\u1ed9t thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n s\u1ebd t\u00e1ch c\u00e1c v\u1ea5n \u0111\u1ec1 n\u00e0y th\u00e0nh c\u00e1c module ri\u00eang bi\u1ec7t.<\/p>\n<h2>\ud83d\udea7 Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ee7a ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/h2>\n<p>Ngay c\u1ea3 v\u1edbi nh\u1eefng \u00fd \u0111\u1ecbnh t\u1ed1t, sai l\u1ea7m v\u1eabn x\u1ea3y ra. Nh\u1eadn di\u1ec7n nh\u1eefng sai l\u1ea7m n\u00e0y s\u1edbm c\u00f3 th\u1ec3 gi\u00fap ti\u1ebft ki\u1ec7m h\u00e0ng gi\u1edd cho vi\u1ec7c g\u1ee1 l\u1ed7i v\u00e0 t\u00e1i c\u1ea5u tr\u00fac sau n\u00e0y.<\/p>\n<h3>\ud83d\udd27 Thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c<\/h3>\n<p>R\u1ea5t c\u00e1m d\u1ed7 khi x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 x\u1eed l\u00fd m\u1ecdi t\u00ecnh hu\u1ed1ng t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 x\u1ea3y ra. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn c\u00e1c c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p, kh\u00f3 s\u1eed d\u1ee5ng cho c\u00e1c y\u00eau c\u1ea7u hi\u1ec7n t\u1ea1i. Nguy\u00ean t\u1eafc KISS (Gi\u1eef \u0111\u01a1n gi\u1ea3n, ngu ng\u1ed1c) th\u01b0\u1eddng \u00e1p d\u1ee5ng \u1edf \u0111\u00e2y. H\u00e3y x\u00e2y d\u1ef1ng cho v\u1ea5n \u0111\u1ec1 \u0111ang g\u1eb7p, ch\u1ee9 kh\u00f4ng ph\u1ea3i cho nh\u1eefng t\u00ecnh hu\u1ed1ng gi\u1ea3 \u0111\u1ecbnh.<\/p>\n<h3>\ud83d\uddfa\ufe0f B\u1ecf qua y\u00eau c\u1ea7u<\/h3>\n<p>Thi\u1ebft k\u1ebf m\u00e0 kh\u00f4ng hi\u1ec3u r\u00f5 y\u00eau c\u1ea7u s\u1ebd d\u1eabn \u0111\u1ebfn h\u1ec7 th\u1ed1ng gi\u1ea3i quy\u1ebft sai v\u1ea5n \u0111\u1ec1. Ph\u00e2n t\u00edch kh\u00f4ng ph\u1ea3i l\u00e0 t\u00f9y ch\u1ecdn. B\u1ecf qua giai \u0111o\u1ea1n ph\u00e2n t\u00edch \u0111\u1ec3 b\u1eaft \u0111\u1ea7u l\u1eadp tr\u00ecnh ngay l\u1eadp t\u1ee9c th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn h\u1ec7 th\u1ed1ng ph\u1ea3i \u0111\u01b0\u1ee3c vi\u1ebft l\u1ea1i ho\u00e0n to\u00e0n khi hi\u1ec3u r\u00f5 nhu c\u1ea7u th\u1ef1c s\u1ef1.<\/p>\n<h3>\ud83e\udde9 T\u1ed1i \u01b0u h\u00f3a qu\u00e1 s\u1edbm<\/h3>\n<p>T\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t tr\u01b0\u1edbc khi h\u1ec7 th\u1ed1ng ho\u1ea1t \u0111\u1ed9ng l\u00e0 m\u1ed9t sai l\u1ea7m ph\u1ed5 bi\u1ebfn. H\u00e3y t\u1eadp trung v\u00e0o t\u00ednh \u0111\u00fang \u0111\u1eafn v\u00e0 s\u1ef1 r\u00f5 r\u00e0ng tr\u01b0\u1edbc ti\u00ean. T\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t s\u1ebd \u0111\u1ebfn sau, khi \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c \u0111i\u1ec3m ngh\u1ebdn. Thi\u1ebft k\u1ebf \u0111\u1ec3 d\u1ec5 \u0111\u1ecdc v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec tr\u01b0\u1edbc ti\u00ean.<\/p>\n<h3>\ud83d\udcd0 Qu\u00e1 t\u1ea3i s\u01a1 \u0111\u1ed3<\/h3>\n<p>T\u1ea1o ra nh\u1eefng s\u01a1 \u0111\u1ed3 kh\u1ed5ng l\u1ed3 m\u00e0 kh\u00f4ng ai \u0111\u1ecdc l\u00e0 ph\u00ed th\u1eddi gian. S\u01a1 \u0111\u1ed3 l\u00e0 c\u00f4ng c\u1ee5 giao ti\u1ebfp, ch\u1ee9 kh\u00f4ng ph\u1ea3i t\u00e0i li\u1ec7u tu\u00e2n th\u1ee7. H\u00e3y gi\u1eef ch\u00fang \u0111\u01a1n gi\u1ea3n v\u00e0 c\u1eadp nh\u1eadt. N\u1ebfu m\u1ed9t s\u01a1 \u0111\u1ed3 kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 th\u1ea3o lu\u1eadn v\u1ec1 h\u1ec7 th\u1ed1ng, th\u00ec n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng mang l\u1ea1i gi\u00e1 tr\u1ecb g\u00ec.<\/p>\n<h2>\u2696\ufe0f Khi n\u00e0o OOAD ph\u00f9 h\u1ee3p v\u00e0 khi n\u00e0o kh\u00f4ng<\/h2>\n<p>Ph\u00e2n t\u00edch v\u00e0 thi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1ea3i ph\u00e1p v\u1ea1n n\u0103ng. C\u00f3 nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00f3 ph\u00f9 h\u1ee3p ho\u00e0n h\u1ea3o, v\u00e0 c\u0169ng c\u00f3 nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00f3 ch\u1ec9 l\u00e0m t\u0103ng g\u00e1nh n\u1eb7ng kh\u00f4ng c\u1ea7n thi\u1ebft.<\/p>\n<h3>\u2705 Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng OOAD<\/h3>\n<ul>\n<li><strong>H\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p:<\/strong> Khi l\u0129nh v\u1ef1c c\u00f3 nhi\u1ec1u th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u00e0 quy t\u1eafc.<\/li>\n<li><strong>Th\u1eddi gian s\u1ed1ng d\u00e0i:<\/strong> Khi ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c k\u1ef3 v\u1ecdng s\u1ebd ph\u00e1t tri\u1ec3n trong nhi\u1ec1u n\u0103m.<\/li>\n<li><strong>H\u1ee3p t\u00e1c nh\u00f3m:<\/strong> Khi nhi\u1ec1u nh\u00e0 ph\u00e1t tri\u1ec3n c\u1ea7n l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng c\u00f9ng l\u00fac.<\/li>\n<li><strong>Y\u00eau c\u1ea7u b\u1ea3o tr\u00ec cao:<\/strong> Khi m\u00e3 ngu\u1ed3n c\u1ea7n \u0111\u01b0\u1ee3c hi\u1ec3u v\u00e0 s\u1eeda \u0111\u1ed5i d\u1ec5 d\u00e0ng b\u1edfi nh\u1eefng ng\u01b0\u1eddi kh\u00e1c.<\/li>\n<\/ul>\n<h3>\u274c Khi n\u00e0o n\u00ean c\u00e2n nh\u1eafc c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf<\/h3>\n<ul>\n<li><strong>C\u00e1c t\u1eadp l\u1ec7nh m\u1ed9t l\u1ea7n:<\/strong> \u0110\u1ed1i v\u1edbi m\u1ed9t nhi\u1ec7m v\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u nhanh ch\u00f3ng, m\u1ed9t t\u1eadp l\u1ec7nh c\u00f3 th\u1ec3 nhanh h\u01a1n.<\/li>\n<li><strong>X\u1eed l\u00fd d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n:<\/strong> N\u1ebfu logic l\u00e0 tuy\u1ebfn t\u00ednh v\u00e0 kh\u00f4ng tr\u1ea1ng th\u00e1i, c\u00e1c c\u00e1ch ti\u1ebfp c\u1eadn ch\u1ee9c n\u0103ng c\u00f3 th\u1ec3 s\u1ea1ch s\u1ebd h\u01a1n.<\/li>\n<li><strong>Th\u1eed nghi\u1ec7m ban \u0111\u1ea7u:<\/strong> Khi t\u1ed1c \u0111\u1ed9 l\u00e0 \u01b0u ti\u00ean duy nh\u1ea5t v\u00e0 m\u00e3 ngu\u1ed3n s\u1ebd b\u1ecb lo\u1ea1i b\u1ecf.<\/li>\n<\/ul>\n<p>\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 \u0111\u00e1nh gi\u00e1 b\u1ed1i c\u1ea3nh. \u0110\u1eebng \u00e1p d\u1ee5ng c\u00e1c m\u1eabu thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p cho m\u1ed9t c\u00f4ng c\u1ee5 d\u00f2ng l\u1ec7nh \u0111\u01a1n gi\u1ea3n. Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u1eebng coi \u1ee9ng d\u1ee5ng ng\u00e2n h\u00e0ng nh\u01b0 m\u1ed9t t\u1eadp l\u1ec7nh t\u1ea1m th\u1eddi. Ph\u00f9 h\u1ee3p ph\u01b0\u01a1ng ph\u00e1p v\u1edbi quy m\u00f4 c\u1ee7a th\u00e1ch th\u1ee9c.<\/p>\n<h2>\ud83d\ude80 Ti\u1ebfn b\u01b0\u1edbc t\u1ef1 tin<\/h2>\n<p>H\u1ecdc c\u00e1ch suy ngh\u0129 theo \u0111\u1ed1i t\u01b0\u1ee3ng m\u1ea5t th\u1eddi gian. \u0110\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc b\u1ea1n c\u00f3 th\u1ec3 b\u1eadt t\u1eaft trong m\u1ed9t \u0111\u00eam. N\u00f3 \u0111\u00f2i h\u1ecfi th\u1ef1c h\u00e0nh, xem x\u00e9t l\u1ea1i v\u00e0 ph\u1ea3n t\u01b0 v\u1ec1 c\u00e1c d\u1ef1 \u00e1n tr\u01b0\u1edbc \u0111\u00e2y. Khi t\u00edch l\u0169y \u0111\u01b0\u1ee3c kinh nghi\u1ec7m, b\u1ea1n s\u1ebd h\u00ecnh th\u00e0nh tr\u1ef1c gi\u00e1c v\u1ec1 vi\u1ec7c khi n\u00e0o n\u00ean t\u1ea1o m\u1ed9t l\u1edbp m\u1edbi v\u00e0 khi n\u00e0o n\u00ean t\u00e1i s\u1eed d\u1ee5ng m\u1ed9t l\u1edbp hi\u1ec7n c\u00f3.<\/p>\n<p>T\u1eadp trung v\u00e0o c\u00e1c nguy\u00ean t\u1eafc thay v\u00ec quy t\u1eafc. C\u00e1c nguy\u00ean t\u1eafc nh\u01b0\u8026 h\u1ee3p th\u1ea5p v\u00e0 g\u1eafn k\u1ebft cao l\u00e0 v\u0129nh c\u1eedu. C\u00e1c m\u1eabu c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7. Hi\u1ec3u \u0111\u01b0\u1ee3c <em>t\u1ea1i sao<\/em>n\u1eb1m sau m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf c\u00f3 gi\u00e1 tr\u1ecb h\u01a1n vi\u1ec7c bi\u1ebft <em>c\u00e1i g\u00ec<\/em>.<\/p>\n<p>H\u00e3y nh\u1edb r\u1eb1ng m\u1ee5c ti\u00eau c\u1ee7a thi\u1ebft k\u1ebf l\u00e0 gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c. D\u00f9 cho b\u1ea3n th\u00e2n hay \u0111\u1ed9i nh\u00f3m, m\u1ed9t h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac t\u1ed1t n\u00ean d\u1ec5 d\u00e0ng thao t\u00e1c. N\u1ebfu b\u1ea1n li\u00ean t\u1ee5c ph\u1ea3i chi\u1ebfn \u0111\u1ea5u v\u1edbi m\u00e3 ngu\u1ed3n, c\u00f3 l\u1ebd \u0111\u00e3 \u0111\u1ebfn l\u00fac xem x\u00e9t l\u1ea1i thi\u1ebft k\u1ebf.<\/p>\n<p>B\u1eaft \u0111\u1ea7u nh\u1ecf. M\u00f4 h\u00ecnh h\u00f3a m\u1ed9t ph\u1ea7n nh\u1ecf trong l\u0129nh v\u1ef1c c\u1ee7a b\u1ea1n. T\u00e1i c\u1ea5u tr\u00fac n\u00f3. Xem nh\u1eefng thay \u0111\u1ed5i \u1ea3nh h\u01b0\u1edfng th\u1ebf n\u00e0o \u0111\u1ebfn ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng. Qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i n\u00e0y gi\u00fap x\u00e2y d\u1ef1ng tr\u00ed nh\u1edb c\u01a1 b\u1eafp c\u1ea7n thi\u1ebft cho c\u00e1c d\u1ef1 \u00e1n l\u1edbn h\u01a1n. Kh\u00f4ng c\u1ea7n v\u1ed9i v\u00e0ng \u00e1p d\u1ee5ng m\u1ecdi m\u1eabu ngay l\u1eadp t\u1ee9c. Ti\u1ebfn tri\u1ec3n \u1ed5n \u0111\u1ecbnh t\u1ed1t h\u01a1n l\u00e0 s\u1ef1 ph\u1ee9c t\u1ea1p v\u1ed9i v\u00e0ng.<\/p>\n<p>B\u1eb1ng c\u00e1ch t\u00e1ch bi\u1ec7t \u1ed3n \u00e0o kh\u1ecfi th\u1ef1c t\u1ebf, b\u1ea1n c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi \u0111\u1ea7u \u00f3c minh m\u1eabn. S\u1eed d\u1ee5ng n\u00f3 nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1, ch\u1ee9 kh\u00f4ng ph\u1ea3i nh\u01b0 m\u1ed9t y\u00eau c\u1ea7u \u0111\u1ec3 ch\u1ee9ng minh ki\u1ebfn th\u1ee9c c\u1ee7a b\u1ea1n. S\u1ef1 thay \u0111\u1ed5i t\u01b0 duy n\u00e0y th\u01b0\u1eddng l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean h\u01b0\u1edbng t\u1edbi tr\u1edf th\u00e0nh m\u1ed9t k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m th\u00e0nh th\u1ea1o.<\/p>\n<h2>\ud83d\udcdd T\u00f3m t\u1eaft nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd<\/h2>\n<ul>\n<li><strong>OOAD l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh:<\/strong> N\u00f3 bao g\u1ed3m c\u1ea3 ph\u00e2n t\u00edch (c\u00e1i g\u00ec) v\u00e0 thi\u1ebft k\u1ebf (l\u00e0m th\u1ebf n\u00e0o).<\/li>\n<li><strong>Gi\u1eef \u0111\u01a1n gi\u1ea3n:<\/strong>Tr\u00e1nh thi\u1ebft k\u1ebf qu\u00e1 m\u1ee9c v\u00e0 t\u1ed1i \u01b0u h\u00f3a s\u1edbm.<\/li>\n<li><strong>T\u1eadp trung v\u00e0o nguy\u00ean t\u1eafc:<\/strong>Bao \u0111\u00f3ng, k\u1ebf th\u1eeba, \u0111a h\u00ecnh v\u00e0 g\u1eafn k\u1ebft l\u00e0 nh\u1eefng tr\u1ee5 c\u1ed9t c\u1ed1t l\u00f5i.<\/li>\n<li><strong>B\u1ed1i c\u1ea3nh l\u00e0 quan tr\u1ecdng:<\/strong>\u00c1p d\u1ee5ng OOAD \u1edf nh\u1eefng n\u01a1i mang l\u1ea1i gi\u00e1 tr\u1ecb, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u1edf m\u1ecdi n\u01a1i.<\/li>\n<li><strong>L\u1eb7p l\u1ea1i:<\/strong>Thi\u1ebft k\u1ebf ph\u00e1t tri\u1ec3n c\u00f9ng v\u1edbi m\u00e3 ngu\u1ed3n.<\/li>\n<\/ul>\n<p>V\u1edbi ki\u1ebfn th\u1ee9c n\u00e0y, b\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng \u0111\u1ec3 \u0111\u1ed1i m\u1eb7t v\u1edbi d\u1ef1 \u00e1n ti\u1ebfp theo c\u1ee7a m\u00ecnh v\u1edbi m\u1ed9t g\u00f3c nh\u00ecn c\u00e2n b\u1eb1ng. Con \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn chuy\u00ean m\u00f4n l\u00e0 d\u00e0i, nh\u01b0ng \u0111\u00edch \u0111\u1ebfn\u2014m\u1ed9t h\u1ec7 th\u1ed1ng d\u1ec5 b\u1ea3o tr\u00ec, v\u1eefng ch\u1eafc\u2014th\u1eadt s\u1ef1 x\u1ee9ng \u0111\u00e1ng v\u1edbi n\u1ed7 l\u1ef1c b\u1ecf ra.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u00e0o th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m th\u01b0\u1eddng c\u1ea3m gi\u00e1c nh\u01b0 b\u01b0\u1edbc v\u00e0o m\u1ed9t khu r\u1eebng r\u1eadm r\u1ea1p m\u00e0 kh\u00f4ng c\u00f3 b\u1ea3n \u0111\u1ed3. Trong s\u1ed1 r\u1ea5t nhi\u1ec1u con \u0111\u01b0\u1eddng, Ph\u00e2n&hellip;<\/p>\n","protected":false},"author":1,"featured_media":125,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: Nh\u1eefng hi\u1ec3u l\u1ea7m vs Th\u1ef1c t\u1ebf d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u","_yoast_wpseo_metadesc":"Kh\u00e1m ph\u00e1 s\u1ef1 th\u1eadt v\u1ec1 OOAD. Ph\u00e2n bi\u1ec7t l\u1eddi qu\u1ea3ng c\u00e1o hoa m\u1ef9 v\u1edbi th\u1ef1c t\u1ebf. H\u01b0\u1edbng d\u1eabn thi\u1ebft y\u1ebfu cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi v\u1ec1 ph\u00e2n t\u00edch, nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf v\u00e0 tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn.","inline_featured_image":false,"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[14],"tags":[6,13],"class_list":["post-124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-object-oriented-analysis-and-design","tag-academic","tag-object-oriented-analysis-and-design"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ph\u00e2n t\u00edch v\u00e0 Thi\u1ebft k\u1ebf H\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng: Nh\u1eefng hi\u1ec3u l\u1ea7m vs Th\u1ef1c t\u1ebf d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u<\/title>\n<meta name=\"description\" content=\"Kh\u00e1m ph\u00e1 s\u1ef1 th\u1eadt v\u1ec1 OOAD. Ph\u00e2n bi\u1ec7t l\u1eddi qu\u1ea3ng c\u00e1o hoa m\u1ef9 v\u1edbi th\u1ef1c t\u1ebf. 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