{"id":1748,"date":"2022-03-17T09:42:13","date_gmt":"2022-03-17T09:42:13","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=1748"},"modified":"2022-03-17T09:42:14","modified_gmt":"2022-03-17T09:42:14","slug":"dependency-injection-la-gi","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/","title":{"rendered":"Dependency Injection l\u00e0 g\u00ec? \u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ef9 thu\u1eadt n\u00e0y"},"content":{"rendered":"\n<p><strong>Dependency Injection l\u00e0 g\u00ec<\/strong> \u0111ang l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi quan t\u00e2m khi t\u00ecm hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m n\u00e0y. Tr\u00ean th\u1ef1c t\u1ebf, \u0111\u1ec3 c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c Dependency Injection l\u00e0 g\u00ec s\u1ebd kh\u00e1 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u1ea7n c\u00f3 v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n. N\u1ebfu b\u1ea1n c\u0169ng \u0111ang t\u00ecm hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m n\u00e0y, b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a <strong><a href=\"https:\/\/topviecit.vn\/\">topviecit.vn<\/a><\/strong> s\u1ebd h\u1eefu \u00edch cho b\u1ea1n.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Ban_co_that_su_hieu_Dependency_Injection_la_gi\" title=\"B\u1ea1n c\u00f3 th\u1eadt s\u1ef1 hi\u1ec3u Dependency Injection l\u00e0 g\u00ec?\">B\u1ea1n c\u00f3 th\u1eadt s\u1ef1 hi\u1ec3u Dependency Injection l\u00e0 g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Khai_niem_Dependency_Injection_la_gi\" title=\"Kh\u00e1i ni\u1ec7m Dependency Injection l\u00e0 g\u00ec?\">Kh\u00e1i ni\u1ec7m Dependency Injection l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Chuc_nang_cua_Dependency_Injection_la_gi\" title=\"Ch\u1ee9c n\u0103ng c\u1ee7a Dependency Injection l\u00e0 g\u00ec?\">Ch\u1ee9c n\u0103ng c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Phan_loai_Dependency_Injection\" title=\"Ph\u00e2n lo\u1ea1i Dependency Injection\">Ph\u00e2n lo\u1ea1i Dependency Injection<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Tim_hieu_ve_uu_%E2%80%93_nhuoc_diem_cua_Dependency_Injection\" title=\"T\u00ecm hi\u1ec3u v\u1ec1 \u01b0u \u2013 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection\">T\u00ecm hi\u1ec3u v\u1ec1 \u01b0u \u2013 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Uu_diem_cua_Dependency_Injection_la_gi\" title=\"\u01afu \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?\">\u01afu \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#Nhuoc_diem_cua_Dependency_Injection_la_gi\" title=\"Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?\">Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ban_co_that_su_hieu_Dependency_Injection_la_gi\"><\/span><strong>B\u1ea1n c\u00f3 th\u1eadt s\u1ef1 hi\u1ec3u Dependency Injection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Dependency Injection (DI) v\u1eabn \u0111ang l\u00e0 thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin. H\u00e3y theo d\u00f5i ph\u1ea7n ti\u1ebfp theo \u0111\u1ec3 hi\u1ec3u h\u01a1n v\u1ec1 thu\u1eadt ng\u1eef Dependency Injection l\u00e0 g\u00ec.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Khai_niem_Dependency_Injection_la_gi\"><\/span><strong>Kh\u00e1i ni\u1ec7m Dependency Injection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Dependency Injection l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt trong l\u0129nh v\u1ef1c IT. V\u1edbi k\u1ef9 thu\u1eadt n\u00e0y, m\u1ed9t object (static method) s\u1ebd cung c\u1ea5p c\u00e1c dependencies cho object kh\u00e1c. M\u1ed7i m\u1ed9t dependency s\u1ebd l\u00e0 m\u1ed9t object c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng hay c\u0169ng c\u00f3 th\u1ec3 hi\u1ec3u l\u00e0 m\u1ed9t server.<\/p>\n\n\n\n<p>\u0110\u1ec3 d\u1ec5 hi\u1ec3u h\u01a1n, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng, dependency\/dependent c\u00f3 ngh\u0129 d\u1ecbch ra ti\u1ebfng Vi\u1ec7t l\u00e0 \u201cph\u1ee5 thu\u1ed9c\u201d. V\u1eady, hi\u1ec3u \u0111\u01a1n gi\u1ea3n th\u00ec Dependency Injection s\u1ebd l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt m\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 n\u00e0o \u0111\u00f3 s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a c\u00e1i g\u00ec ho\u1eb7c s\u1ef1 vi\u1ec7c n\u00e0o \u0111\u00f3.<\/p>\n\n\n\n<p>Dependency Injection s\u1ebd l\u1eadp tr\u00ecnh m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0y s\u1ebd nh\u1eadn c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c m\u00e0 n\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o. Hay theo chuy\u00ean ng\u00e0nh, \u0111\u00e2y s\u1ebd l\u00e0 qu\u00e1 tr\u00ecnh \u201cti\u00eam ph\u1ee5 thu\u1ed9c\u201d. Nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1eadn s\u1ef1 ph\u1ee5 thu\u1ed9c s\u1ebd tr\u1edf th\u00e0nh m\u00e1y kh\u00e1ch, \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c ti\u00eam ph\u1ee5 thu\u1ed9c s\u1ebd l\u00e0 d\u1ecbch v\u1ee5.<\/p>\n\n\n\n<p>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/computer-science-la-gi\/\">Computer Science l\u00e0 g\u00ec? N\u00ean h\u1ecdc tr\u01b0\u1eddng n\u00e0o t\u1ed1t nh\u1ea5t?<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-21.jpeg\" alt=\"Kh\u00e1i ni\u1ec7m Dependency Injection l\u00e0 g\u00ec?\" class=\"wp-image-1749\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-21.jpeg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-21-640x400.jpeg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-21-768x480.jpeg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>Kh\u00e1i ni\u1ec7m Dependency Injection l\u00e0 g\u00ec?<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Chuc_nang_cua_Dependency_Injection_la_gi\"><\/span><strong>Ch\u1ee9c n\u0103ng c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Dependency Injection th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi 3 m\u1ee5c \u0111\u00edch ch\u00ednh trong l\u1eadp tr\u00ecnh. \u0110\u00e2y l\u00e0 nh\u1eefng ch\u1ee9c n\u0103ng kh\u00e1 quan tr\u1ecdng v\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean, bao g\u1ed3m:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>&nbsp;T\u1ea1o ra \u0111\u1ed1i t\u01b0\u1ee3ng (object) trong khi l\u1eadp tr\u00ecnh.<\/li><li>Gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean bi\u1ebft \u0111\u01b0\u1ee3c c\u00e1c class (l\u1edbp) n\u00e0o s\u1ebd c\u1ea7n nh\u1eefng object v\u1eeba t\u1ea1o.<\/li><li>Cung c\u1ea5p cho c\u00e1c class (l\u1edbp) v\u1ec1 object m\u00e0 ch\u00fang c\u1ea7n.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Phan_loai_Dependency_Injection\"><\/span><strong>Ph\u00e2n lo\u1ea1i Dependency Injection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Hi\u1ec7n t\u1ea1i, Dependency Injection \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh c\u00e1c lo\u1ea1i sau \u0111\u00e2y d\u1ef1a v\u00e0o m\u1ee5c \u0111\u00edch, nhi\u1ec7m v\u1ee5 ri\u00eang c\u1ee7a m\u1ed7i lo\u1ea1i. Bao g\u1ed3m:<\/p>\n\n\n\n<p><strong>Constructor Injection:<\/strong> L\u1eadp tr\u00ecnh vi\u00ean s\u1ebd th\u1ef1c hi\u1ec7n t\u1ea1o m\u1ed9t h\u00e0m t\u1ea1o l\u1edbp \u1edf lo\u1ea1i n\u00e0y. Sau \u0111\u00f3 h\u00e0m n\u00e0y s\u1ebd cung c\u1ea5p c\u00e1c bi\u1ebfn ph\u1ee5 thu\u1ed9c v\u00e0 ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng sau \u0111\u00f3. K\u1ef9 thu\u1eadt Constructor Injection \u0111\u01b0\u1ee3c xem l\u00e0 k\u1ef9 thu\u1eadt l\u1eadp n\u1ec1n m\u00f3ng trong khi l\u1eadp tr\u00ecnh.<\/p>\n\n\n\n<p><strong>Setter Injection: <\/strong>V\u1edbi k\u1ef9 thu\u1eadt n\u00e0y, c\u00e1c client s\u1ebd \u0111\u01b0a ra ph\u01b0\u01a1ng th\u1ee9c \u0111\u1ec3 t\u1ea1o ra ch\u1ee9c n\u0103ng setter. Sau \u0111\u00f3 khi \u0111\u00e3 c\u00f3 ch\u1ee9c n\u0103ng setter, c\u00e1c l\u1edbp (class) s\u1ebd b\u1eaft \u0111\u1ea7u ti\u1ebfn h\u00e0nh Dependency Injection theo c\u00e1ch \u0111\u01a1n gi\u1ea3n h\u01a1n.<\/p>\n\n\n\n<p><strong>Interface Injection: <\/strong>\u0110\u00e2y l\u00e0 qu\u00e1 tr\u00ecnh ph\u1ee5 thu\u1ed9c, cung c\u1ea5p th\u00f4ng tin c\u0169ng nh\u01b0 ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c h\u00e0m injector. Nh\u1eefng h\u00e0m n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c inject c\u1ee5 th\u1ec3 v\u1edbi t\u1eebng client. Sau khi ch\u00fang \u0111\u01b0\u1ee3c inject, c\u00e1c setter method s\u1ebd xu\u1ea5t hi\u1ec7n v\u00e0 ch\u1ea5p nh\u1eadn bi\u1ebfn ph\u1ee5 thu\u1ed9c.<\/p>\n\n\n\n<p>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/side-effect-la-gi\/\">Side Effect l\u00e0 g\u00ec? T\u1ea5t c\u1ea3 nh\u1eefng ki\u1ebfn th\u1ee9c newbie c\u1ea7n bi\u1ebft<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-22.jpeg\" alt=\"Dependency Injection \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a v\u00e0o m\u1ee5c \u0111\u00edch, nhi\u1ec7m v\u1ee5\" class=\"wp-image-1750\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-22.jpeg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-22-640x400.jpeg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-22-768x480.jpeg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>Dependency Injection \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a v\u00e0o m\u1ee5c \u0111\u00edch, nhi\u1ec7m v\u1ee5<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tim_hieu_ve_uu_%E2%80%93_nhuoc_diem_cua_Dependency_Injection\"><\/span><strong>T\u00ecm hi\u1ec3u v\u1ec1 \u01b0u \u2013 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>B\u1ea5t k\u1ef3 k\u1ef9 thu\u1eadt n\u00e0o trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec1u c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m, nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang. \u0110\u1ed1i v\u1edbi Dependency Injection c\u0169ng kh\u00f4ng ngo\u1ea1i l\u1ec7. N\u1ebfu b\u1ea1n \u0111ang mu\u1ed1n t\u00ecm hi\u1ec3u ngay v\u1ec1 \u01b0u \u2013 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec, h\u00e3y theo d\u00f5i ph\u1ea7n ti\u1ebfp theo c\u1ee7a b\u00e0i vi\u1ebft.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Uu_diem_cua_Dependency_Injection_la_gi\"><\/span><strong>\u01afu \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Khi s\u1eed d\u1ee5ng Dependency Injection, b\u1ea1n s\u1ebd nh\u1eadn th\u1ea5y k\u1ef9 thu\u1eadt n\u00e0y c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Gi\u00fap l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 vi\u1ebft c\u00e1c Unit Test \u0111\u01b0\u1ee3c d\u1ec5 d\u00e0ng h\u01a1n. \u0110i\u1ec1u n\u00e0y th\u1ec3 hi\u1ec7n \u1edf kh\u00eda c\u1ea1nh b\u1ea1n c\u00f3 th\u1ec3 inject dependency v\u00e0o m\u1ed9t class th\u00ec c\u0169ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u201cti\u00eam\u201d \u0111\u01b0\u1ee3c c\u00e1c mock object v\u00e0o trong class \u0111\u01b0\u1ee3c tess \u0111\u00f3.<\/li><li>Gi\u1ea3m thi\u1ec3u boilerplate code do kh\u1edfi t\u1ea1o dependency \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb m\u1ed9t component kh\u00e1c.<\/li><li>C\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y \u0111\u01b0\u1ee3c quan h\u1ec7 gi\u1eefa c\u00e1c object \u0111\u01b0\u1ee3c d\u1ec5 d\u00e0ng h\u01a1n. B\u1edfi Dependency Injection s\u1ebd th\u1ef1c hi\u1ec7n inject nh\u1eefng object ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c th\u00e0nh ph\u1ea7n interface c\u1ee7a object b\u1ecb ph\u1ee5 thu\u1ed9c. V\u00ec v\u1eady khi s\u1eed d\u1ee5ng k\u1ef9 thu\u1eadt n\u00e0y s\u1ebd d\u1ec5 d\u00e0ng th\u1ea5y \u0111\u01b0\u1ee3c m\u1ed1i quan h\u1ec7 \u0111\u00f3.<\/li><li>Gi\u00fap cho l\u1eadp tr\u00ecnh vi\u00ean c\u00f3 th\u1ec3 m\u1edf d\u1ee5ng d\u1ef1 \u00e1n \u0111\u01b0\u1ee3c \u0111\u01a1n gi\u1ea3n, d\u1ec5 d\u00e0ng h\u01a1n.<\/li><li>H\u1eefu \u00edch v\u1edbi c\u00e1c loose coupling (li\u00ean k\u1ebft l\u1ecfng) gi\u1eefa nh\u1eefng th\u00e0nh ph\u1ea7n trong d\u1ef1 \u00e1n v\u1edbi nhau.<\/li><li>M\u1edf r\u1ed9ng c\u00e1c t\u00ednh n\u0103ng, \u1ee9ng d\u1ee5ng d\u1ec5 d\u00e0ng v\u00e0 \u0111\u01a1n gi\u1ea3n h\u01a1n.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nhuoc_diem_cua_Dependency_Injection_la_gi\"><\/span><strong>Nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Dependency Injection l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>B\u00ean c\u1ea1nh nh\u1eefng \u01b0u \u0111i\u1ec3m, vi\u1ec7c s\u1eed d\u1ee5ng Dependency Injection c\u0169ng s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m, h\u1ea1n ch\u1ebf nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u0110\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c Dependency Injection, b\u1ea1n s\u1ebd c\u1ea7n ph\u1ea3i h\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c kh\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 tr\u1eebu t\u01b0\u1ee3ng. N\u1ebfu s\u1eed d\u1ee5ng qu\u00e1 \u0111\u00e0, Dependency Injection c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 c\u00f3 h\u1ea1i kh\u00e1c cho qu\u00e1 tr\u00ecnh l\u1eadp tr\u00ecnh.<\/li><li>Khi s\u1eed d\u1ee5ng Dependency Injection, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng m\u1ed9t s\u1ed1 l\u1ed7i \u1edf compile time c\u00f3 th\u1ec3 s\u1ebd b\u1ecb \u0111\u1ea9y sang runtime. \u0110i\u1ec1u n\u00e0y s\u1ebd g\u00e2y kh\u00f3 kh\u0103n cho qu\u00e1 tr\u00ecnh debug source code, b\u1edfi b\u1ea1n s\u1ebd kh\u00f4ng th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c implement n\u00e0o \u0111ang \u0111\u01b0\u1ee3c truy\u1ec1n v\u00e0o.<\/li><li>Dependency Injection c\u00f3 th\u1ec3 l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng find references hay auto-complete c\u1ee7a m\u1ed9t s\u1ed1 IDE. Do Dependency Injection \u1ea9n dependencies, m\u1ed9t s\u1ed1 l\u1ed7i s\u1ebd ch\u1ec9 xu\u1ea5t hi\u1ec7n khi ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh m\u00e0 kh\u00f4ng xu\u1ea5t hi\u1ec7n khi th\u1ef1c hi\u1ec7n bi\u00ean d\u1ecbch ch\u01b0\u01a1ng tr\u00ecnh.<\/li><li>Dependency Injection s\u1ebd kh\u00f4ng r\u00f5 r\u00e0ng v\u1ec1 t\u01b0 t\u01b0\u1edfng khi th\u1ef1c hi\u1ec7n. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n Dependency Injection b\u1ecb nh\u1eadp nh\u1eb1ng, c\u00e1c injector b\u1ecb ph\u1ee5 thu\u1ed9c v\u00e0 kh\u00f4ng tho\u00e1t \u0111\u01b0\u1ee3c ho\u00e0n to\u00e0n theo t\u01b0 t\u01b0\u1edfng c\u1ee7a Dependency Injection.<\/li><\/ul>\n\n\n\n<p>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/stackoverflow-la-gi\/\">Stackoverflow l\u00e0 g\u00ec? Nh\u1eefng \u0111i\u1ec1u l\u00ednh m\u1edbi c\u1ea7n bi\u1ebft<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-23.jpeg\" alt=\"Dependency Injection s\u1ebd t\u1ed3n t\u1ea1i c\u00e1c \u01b0u - nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang khi s\u1eed d\u1ee5ng\" class=\"wp-image-1751\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-23.jpeg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-23-640x400.jpeg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/image-23-768x480.jpeg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption><em>Dependency Injection s\u1ebd t\u1ed3n t\u1ea1i c\u00e1c \u01b0u &#8211; nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang khi s\u1eed d\u1ee5ng<\/em><\/figcaption><\/figure><\/div>\n\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 b\u00e0i vi\u1ebft t\u1ed5ng h\u1ee3p c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n m\u00e0 b\u1ea1n c\u1ea7n hi\u1ec3u v\u1ec1 Dependency Injection. Hy v\u1ecdng sau nh\u1eefng th\u00f4ng tin n\u00e0y, b\u1ea1n s\u1ebd n\u1eafm \u0111\u01b0\u1ee3c <strong>Dependency Injection l\u00e0 g\u00ec<\/strong>. Tuy l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m kh\u00e1 tr\u1eebu t\u01b0\u1ee3ng, nh\u01b0ng Dependency Injection v\u1eabn l\u00e0 ki\u1ebfn th\u1ee9c m\u00e0 b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 n\u1ebfu l\u00e0m vi\u1ec7c trong l\u0129nh v\u1ef1c IT.<\/p>\n\n\n\n<p>>>>Xem th\u00eam: <a href=\"https:\/\/topviecit.vn\/blog\/chuc-nang-cua-he-quan-tri-co-so-du-lieu\/\">Kh\u00e1m ph\u00e1 nh\u1eefng ch\u1ee9c n\u0103ng c\u1ee7a h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/a><\/p>\n\n\n\n<p class=\"has-text-align-right\"><em>H\u00ecnh \u1ea3nh: S\u01b0u t\u1ea7m<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dependency Injection l\u00e0 g\u00ec \u0111ang l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi quan t\u00e2m khi t\u00ecm hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m n\u00e0y. Tr\u00ean th\u1ef1c t\u1ebf, \u0111\u1ec3 c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c Dependency Injection l\u00e0 g\u00ec s\u1ebd kh\u00e1 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u1ea7n c\u00f3 v\u00ed d\u1ee5 c\u1ee5 th\u1ec3 \u0111\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n. N\u1ebfu b\u1ea1n c\u0169ng \u0111ang t\u00ecm [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":1752,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[86],"tags":[417],"class_list":["post-1748","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem","tag-dependency-injection-la-gi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dependency Injection l\u00e0 g\u00ec? \u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ef9 thu\u1eadt n\u00e0y<\/title>\n<meta name=\"description\" content=\"Dependency Injection l\u00e0 g\u00ec? \u0110\u00f3 l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt trong l\u0129nh v\u1ef1c IT. V\u1edbi k\u1ef9 thu\u1eadt n\u00e0y, m\u1ed9t object (static method) s\u1ebd cung c\u1ea5p c\u00e1c dependencies cho object kh\u00e1c.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dependency Injection l\u00e0 g\u00ec? \u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ef9 thu\u1eadt n\u00e0y\" \/>\n<meta property=\"og:description\" content=\"Dependency Injection l\u00e0 g\u00ec? \u0110\u00f3 l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt trong l\u0129nh v\u1ef1c IT. V\u1edbi k\u1ef9 thu\u1eadt n\u00e0y, m\u1ed9t object (static method) s\u1ebd cung c\u1ea5p c\u00e1c dependencies cho object kh\u00e1c.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\" \/>\n<meta property=\"og:site_name\" content=\"TopviecIT\" \/>\n<meta property=\"article:published_time\" content=\"2022-03-17T09:42:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-03-17T09:42:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/2-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Dang Huong\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dang Huong\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\"},\"author\":{\"name\":\"Dang Huong\",\"@id\":\"https:\/\/topviecit.vn\/blog\/#\/schema\/person\/bf5d0c56a2c02d2a5dba393c3e18f8de\"},\"headline\":\"Dependency Injection l\u00e0 g\u00ec? \u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ef9 thu\u1eadt n\u00e0y\",\"datePublished\":\"2022-03-17T09:42:13+00:00\",\"dateModified\":\"2022-03-17T09:42:14+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\"},\"wordCount\":1686,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/2-1.jpg\",\"keywords\":[\"Dependency Injection l\u00e0 g\u00ec\"],\"articleSection\":[\"Chia s\u1ebb kinh nghi\u1ec7m\"],\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\",\"url\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/\",\"name\":\"Dependency Injection l\u00e0 g\u00ec? \u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m k\u1ef9 thu\u1eadt n\u00e0y\",\"isPartOf\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/topviecit.vn\/blog\/dependency-injection-la-gi\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2022\/03\/2-1.jpg\",\"datePublished\":\"2022-03-17T09:42:13+00:00\",\"dateModified\":\"2022-03-17T09:42:14+00:00\",\"description\":\"Dependency Injection l\u00e0 g\u00ec? \u0110\u00f3 l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt trong l\u0129nh v\u1ef1c IT. 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