Video: Dab tsi yog qhov peev txheej thaum caij nplooj ntoos hlav?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov peev txheej yog ib qho interface hauv Caij nplooj ntoos hlav sawv cev rau sab nraud peev txheej . Caij nplooj ntoos hlav muab ntau yam kev siv rau cov Cov peev txheej interface. Txoj kev getResource() ntawm ResourceLoader txiav txim siab qhov Cov peev txheej kev siv los siv. Qhov no yog txiav txim los ntawm lub peev txheej txoj kev. Code ntawm lub Cov peev txheej interface yog qhov no.
Hauv qhov no, @resource annotation nyob rau lub caij nplooj ntoo hlav yog dab tsi?
JSR 250 @ Resource annotation yog siv los kos ib qho kev siv raws li a peev txheej . Qhov no lus piav qhia tuaj yeem siv rau hauv chav kawm, teb thiab txoj kev. Caij nplooj ntoos hlav txhawb kev txhaj tshuaj siv cov @ Resource annotation , thaum nws yog siv rau ntawm ib daim teb los yog setter txoj kev ntawm taum.
Tsis tas li ntawd, @inject nyob rau lub caij nplooj ntoo hlav yog dab tsi? @ Txhaj annotation yog ib tug qauv annotation, uas yog txhais nyob rau hauv tus txheej txheem "Dependency Txhaj tshuaj rau Java" (JSR-330). Caij nplooj ntoos hlav (txij li lub version 3.0) txhawb nqa tus qauv dav dav ntawm kev vam khom txhaj tshuaj uas tau txhais nyob rau hauv tus qauv JSR-330.
Tsis tas li ntawd, dab tsi yog kev xaim hauv caij nplooj ntoos hlav?
- Taum kab hluav taws xob yog cov txheej txheem ntawm kev sib txuas taum nrog Caij nplooj ntoos hlav thawv. Cov taum uas xav tau yuav tsum tau ceeb toom rau lub thawv thiab yuav ua li cas lub thawv yuav tsum siv cov tshuaj tiv thaiv los khi lawv ua ke, thaum lub sijhawm kab hluav taws xob cov taum.
ClassPath nyob rau lub caij nplooj ntoos hlav yog dab tsi?
A chav kawm txoj kev cov peev txheej zoo li cov chav kawm lossis cov ntaub ntawv muaj peev xwm thiab ib txwm raug txheeb xyuas nrog rau cov chav kawm loader. Caij nplooj ntoos hlav Classpath Cov peev txheej. Hauv qhov piv txwv hauv qab no, peb ua qauv qhia yuav ua li cas classPathResource khaws cov peev txheej raws li classloader peb dhau.
Pom zoo:
Tam sim no version ntawm caij nplooj ntoos hlav yog dab tsi?
Lub Caij Nplooj Ntoos Hlav 4.3 tau tshaj tawm rau 10 Lub Rau Hli 2016 thiab yuav txhawb nqa mus txog rau xyoo 2020. Nws 'yuav yog tiam kawg nyob rau hauv lub caij nplooj ntoos hlav 4 dav dav (Java 6+, Servlet 2.5+), []'. Caij nplooj ntoos hlav 5 tau tshaj tawm los ua raws li Reactive Stream tau tshaj Reactor Core
@value ua dab tsi thaum caij nplooj ntoos hlav?
Spring @Value annotation yog siv los muab qhov tseem ceeb rau qhov sib txawv thiab cov lus sib cav. Peb tuaj yeem nyeem qhov hloov pauv ib puag ncig lub caij nplooj ntoo hlav nrog rau cov kab ke sib txawv siv @Value annotation. Spring @Value annotation kuj txhawb SpEL
Dab tsi yog Qhov Chaw Tso Khoom Hauv Caij Nplooj Ntoos Hlav?
Caij nplooj ntoos hlav ntsiab lus: khoom vaj khoom tsev-placeholder. Cov ntsiab lus: khoom vaj khoom tsev-qhov chaw cim npe yog siv los tsim cov khoom ntiag tug hauv cov ntaub ntawv cais. Nws cia li configures PropertyPlaceholderConfigurer, uas hloov lub ${} placeholder, uas yog daws tawm tsam ib tug tshwj xeeb cov ntaub ntawv (raws li lub caij nplooj ntoos hlav resource chaw)
Kev siv @controller thaum caij nplooj ntoos hlav yog dab tsi?
Spring Controller annotation tuaj yeem siv rau ntawm cov chav kawm nkaus xwb. Nws yog siv los kos ib chav kawm raws li tus neeg thov web thov. Nws feem ntau yog siv nrog Spring MVC daim ntawv thov
Dab tsi yog qhov txawv ntawm byType thiab byName hauv caij nplooj ntoos hlav?
Qhov sib txawv ntawm byType thiab byName autowiring yog raws li hauv qab no: Autowire byType yuav tshawb nrhiav taum hauv cov ntaub ntawv teeb tsa, uas nws tus id phim nrog cov cuab yeej cuab tam yuav raug xaim whereas autowire byName yuav tshawb rau taum uas nws tus id yog txuam nrog cov cuab yeej lub npe. siv kab