Video: Cron kev qhia yog dab tsi nyob rau lub caij nplooj ntoos hlav?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A Cron kev qhia suav nrog rau qhov sib luag - thib ob, feeb, teev, hnub ntawm lub hli, hli, hnub (s) ntawm lub lis piam.and tau tshaj tawm raws li hauv qab no @Scheduled( cron = "* * * * **")
Kuj kom paub yog, dab tsi yog qhov kev qhia cron?
A CRON kev qhia yog ib txoj hlua ntawm 6 lossis 7 teb, sib cais los ntawm qhov chaw dawb, uas sawv cev rau lub sijhawm. A CRONexpression siv cov qauv hauv qab no (xyoo yog xaiv tau): Yog tias koj hloov lub sijhawm teev rau 6, 0 0 6 * * *, koj cov hlua sawv cev txhua hnub thaum 6:00 AM.
Cron qhia dab tsi hauv Java? A Cron Expressions Cron nthuav qhia yog siv los teeb tsa qhov piv txwv ntawm CronTrigger, subclass ntawm org.quartz. Trigger. A cronexpression yog ib txoj hlua uas muaj rau los yog xyasubexpressions (thaj chaw) uas piav qhia txog tus kheej cov ntsiab lus ntawm lub sijhawm.
Hauv qhov no, cron txoj hauj lwm nyob rau lub caij nplooj ntoos hlav yog dab tsi?
Caij nplooj ntoos hlav @Scheduled – 4 Txoj kev mus teem sijhawm Cov hauj lwm . Caij nplooj ntoos hlav muab kev txhawb nqa zoo rau ob leeg txoj hauj lwm teem sijhawm thiab asynchronous txoj kev ua raws li cron qhia siv @Scheduled annotation. Lub @Scheduledannotation tuaj yeem ntxiv rau ib txoj hauv kev nrog rau triggermetadata.
Lub caij nplooj ntoos hlav Schedule yog dab tsi?
Teem sijhawm yog ib txheej txheem ntawm kev ua cov haujlwm rau lub sijhawm tshwj xeeb. Caij nplooj ntoos hlav Boot muab kev txhawb nqa zoo sau a tus teem sijhawm ntawm Caij nplooj ntoos hlav daim ntawv thov.
Pom zoo:
Dao chav kawm nyob rau lub caij nplooj ntoos hlav yog dab tsi?
Nws yog tus qauv tsim nyob rau hauv uas cov ntaub ntawv nkag mus siv khoom (DAO) yog ib yam khoom uas muab qhov kev paub daws teeb meem rau qee hom database lossis lwm yam kev ua haujlwm ruaj khov. Lub caij nplooj ntoos hlav cov ntaub ntawv nkag mus rau lub moj khaum yog muab los koom ua ke nrog cov txheej txheem sib txawv xws li JDBC, Hibernate, JPA, iBatis thiab lwm yam
Kev siv @value annotation nyob rau lub caij nplooj ntoos hlav yog dab tsi?
Spring @PropertySource annotations yog tsuas yog siv los nyeem los ntawm cov ntaub ntawv khoom siv Spring's Environment interface. Cov lus piav qhia no yog nyob rau hauv kev xyaum, muab tso rau ntawm @Configuration chav kawm. Caij nplooj ntoos hlav @Value annotation tuaj yeem siv los qhia cov lus qhia ntawm daim teb lossis txoj hauv kev. Cov ntaub ntawv siv feem ntau yog qhia cov cuab yeej los ntawm a
Dab tsi yog kev siv cov tshuaj tivthaiv scan nyob rau lub caij nplooj ntoos hlav?
Siv cov khoom siv tshuaj ntsuam xyuas yog ib txoj hauv kev nug Spring kom paub txog Spring-managed Cheebtsam. Caij nplooj ntoos hlav xav tau cov ntaub ntawv los nrhiav thiab sau npe tag nrho cov Caij Nplooj Ntoos Hlav nrog cov ntsiab lus ntawm daim ntawv thov thaum daim ntawv thov pib
Kev siv Autowired annotation nyob rau lub caij nplooj ntoos hlav yog dab tsi?
Spring @Autowired annotation yog siv rau kev txhaj tshuaj tsis siv neeg. Spring moj khaum yog tsim los ntawm kev vam khom kev txhaj tshuaj thiab peb txhaj cov chav kawm dependencies los ntawm lub caij nplooj ntoos hlav taum configuration file
Lub ntsiab lus configuration nyob rau lub caij nplooj ntoos hlav yog dab tsi?
Lub Caij Nplooj Ntoos Zeeg yog dab tsi? Caij nplooj ntoos hlav ntsiab lus tseem hu ua Spring IoC ntim, uas yog lub luag hauj lwm rau instantiating, configuring, thiab assembling taum los ntawm kev nyeem configuration metadata los ntawm XML, Java annotations, thiab / los yog Java code nyob rau hauv cov ntaub ntawv configuration