Video: Constructor dependency txhaj yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Constructor Txhaj yog txoj cai ntawm statically txhais cov npe uas yuav tsum tau ua Kev vam meej los ntawm kev qhia lawv ua parameters rau cov chav kawm tus tsim . Cov chav kawm uas xav tau Kev vam meej yuav tsum nthuav tawm rau pej xeem tus tsim uas siv ib qho piv txwv ntawm qhov xav tau Kev vam meej as a tus tsim kev sib cav.
Kuj paub yog, dab tsi yog constructor raws li kev txhaj tshuaj?
Tus tsim - Raws li kev vam meej Txhaj tshuaj Constructor - raws DI yog thaum lub thawv invokes a tus tsim nrog ib tug xov tooj ntawm cov lus sib cav, txhua tus uas sawv cev rau a kev vam khom lossis lwm chav kawm. Nws yog POJO uas tsis muaj kev vam khom ntawm lub thawv tshwj xeeb interfaces, cov chav kawm hauv paus, lossis cov lus piav qhia.
Kuj Paub, dab tsi yog qhov kev txhaj tshuaj tiv thaiv? Hauv software engineering, kev vam meej txhaj tshuaj yog ib tug txheej txheem uas ib yam khoom (los yog static method) muab cov kev vam khom ntawm lwm yam khoom. A kev vam khom yog ib yam khoom uas siv tau (kev pabcuam). Qhov ntawd yog Wikipedia txhais tab sis tseem, tab sis nws tsis yooj yim to taub.
Nyob rau hauv no, dab tsi yog kev txhaj tshuaj tiv thaiv nrog piv txwv?
Hauv software engineering, kev vam meej txhaj tshuaj yog ib txoj kev uas ib yam khoom muab cov kev vam khom ntawm lwm yam khoom. A " kev vam khom " yog ib yam khoom uas yuav siv tau, rau piv txwv raws li kev pabcuam. Hloov chaw tus neeg siv khoom qhia qhov kev pabcuam twg nws yuav siv, qee yam qhia tus neeg siv khoom siv qhov kev pabcuam twg.
Dependency txhaj yog dab tsi hauv cov lus yooj yim?
Kev Txhaum Cai yog lub tswv yim tsim software uas tso cai rau kev pabcuam siv / txhaj nyob rau hauv ib txoj kev uas yog kiag li ywj siab ntawm txhua tus neeg siv khoom. Kev txhaj tshuaj tiv thaiv cais cov creation ntawm tus neeg siv khoom kev vam khom los ntawm tus neeg siv khoom tus cwj pwm, uas tso cai rau kev tsim cov kev pab cuam kom xoob ua ke.
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