Video: JdbcTemplate ua haujlwm li cas thaum caij nplooj ntoos hlav?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov JdbcTemplate chav kawm executes SQL queries, iterates tshaj lub ResultSet, thiab retrieves lub hu ua qhov tseem ceeb, hloov tshiab cov lus qhia thiab cov txheej txheem hu, "catches" cov kev zam, thiab txhais lawv rau hauv cov kev zam uas tau teev tseg nyob rau hauv lub org.
Ua raws li qhov no, kev siv JdbcTemplate nyob rau lub caij nplooj ntoo hlav yog dab tsi?
Caij nplooj ntoos hlav yog Java nrov daim ntawv thov lub moj khaum. JdbcTemplate yog ib qho cuab yeej rau kev yooj yim programming nrog JDBC. Nws saib xyuas qhov tsis txaus ntseeg thiab ua yuam kev-qib cov ntsiab lus qis xws li tuav kev lag luam, ntxuav cov peev txheej, thiab ua kom raug kev zam. JdbcTemplate yog suav nrog Caij nplooj ntoos hlav caij nplooj ntoos hlav -jdbc module.
Tsis tas li ntawd, Spring txuas mus rau database li cas? Txhawm rau nkag mus rau Relational Database los ntawm kev siv JdbcTemplate hauv Caij nplooj ntoos hlav Boot daim ntawv thov, peb yuav tsum tau ntxiv cov Caij nplooj ntoos hlav Boot Starter JDBC kev vam khom nyob rau hauv peb cov ntaub ntawv configuration. Tom qab ntawd, yog tias koj @Autowired chav kawm JdbcTemplate, Caij nplooj ntoos hlav Boot yeej txuas cov Database thiab teev cov Cov ntaub ntawv rau cov khoom JdbcTemplate.
Ib yam li ntawd, queryForObject nyob rau lub caij nplooj ntoo hlav yog dab tsi?
Hauv Caij nplooj ntoos hlav , peb tuaj yeem siv jdbcTemplate. queryForObject () kom nug ib kab ntawv sau los ntawm cov ntaub ntawv, thiab hloov cov kab mus rau hauv ib qho khoom ntawm kab mapper.
Puas yog caij nplooj ntoos hlav JdbcTemplate kaw kev sib txuas?
4 Teb. Hauv luv yog nws tsis kaw tus kev sib txuas . Cov lus teb ntev nws nyob ntawm. Thaum koj tsis muaj Caij nplooj ntoos hlav tswj kev lag luam ces yog tus JdbcTemplate yuav hu lub kaw () txoj hauv kev Kev sib txuas.
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