Jackson JSON ua haujlwm li cas?
Jackson JSON ua haujlwm li cas?

Video: Jackson JSON ua haujlwm li cas?

Video: Jackson JSON ua haujlwm li cas?
Video: Me koj txiv ntshe yog txoj hmoo 9/17/2017 2024, Kaum ib hlis
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Cov Jackson ObjectMapper tau parse JSON los ntawm ib txoj hlua, kwj lossis cov ntaub ntawv, thiab tsim ib qho khoom siv Java lossis cov duab kos uas sawv cev rau qhov parsed JSON . Parsing JSON rau hauv Java cov khoom kuj raug xa mus rau deserialize Java khoom los ntawm JSON . Cov Jackson ObjectMapper kuj tsim tau JSON los ntawm Java khoom.

Raws li, Jackson JSON yog dab tsi?

Jackson yog ib lub tsev qiv ntawv java nrov heev thiab muaj txiaj ntsig zoo rau serialize lossis map java khoom rau JSON thiab vice versa. Qhov kev qhia no yuav qhia koj qhov yooj yim thiab qib siab Jackson lub tsev qiv ntawv API nta thiab lawv cov kev siv nyob rau hauv ib qho yooj yim thiab intuitive txoj kev.

Jackson puas siv kev xav? Piv txwv li, Java Kev xav tuaj yeem yog siv los qhia cov khoom hauv JSON cov ntaub ntawv kom tau txais / teeb tsa txoj hauv kev hauv Java cov khoom, zoo li Jackson , GSON, Boon thiab lwm yam. ua . Los yog, Kev xav tuaj yeem yog siv los qhia cov npe kab ntawm JDBC ResultSet rau getter / setter txoj kev hauv Java khoom.

Tsis tas li ntawd, JSON deserialize ua haujlwm li cas?

Nws rov qab los JSON cov ntaub ntawv nyob rau hauv txoj hlua hom. Hauv Deserialization , nws ua qhov opposite ntawm Serialization uas txhais tau tias nws converts JSON txoj hlua rau kev cai. Hauv cov cai hauv qab no, nws hu rau txoj kev zoo li qub DeserializeObject() ntawm JsonConvert chav kawm dhau los JSON cov ntaub ntawv. Nws rov qab kev cai khoom (BlogSites) los ntawm JSON cov ntaub ntawv.

Puas yog lub caij nplooj ntoos hlav siv Jackson?

Caij nplooj ntoos hlav khau raj , los ntawm lub neej ntawd, suav nrog Jackson 2 kev vam thiab yog ib feem ntawm caij nplooj ntoos hlav - khau raj -starter-json. Siv JacksonAutoConfiguration chav kawm, caij nplooj ntoos hlav khau raj cia li configures Jackson nrog tus cwj pwm hauv qab no: ObjectMapper nyob rau hauv cov ntaub ntawv tsis muaj ib qho twb tau teeb tsa.

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