Cov txheej txheem:
Video: Daim ntawv qhia hauv JSON yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Lub hom phiaj. Koj ua tau daim ntawv qhia cov ntaub ntawv hom ntawm koj tus qauv ua lag luam rau hauv JSON los ntawm kev siv cov piv txwv. A JSON khoom yog ib qho kev sau npe thiab cov nqi uas tsis tau txiav txim. A JSON array yog ib qho kev txiav txim ntawm cov nqi. Tus nqi yuav yog ib txoj hlua, tus lej, Boolean, ib qho null, ib qho khoom, lossis ib qho array.
Tom qab ntawd, hom ntaub ntawv twg yog JSON?
JSON (JavaScript Object Notation) yog siv dav tshaj plaws cov ntaub ntawv format rau cov ntaub ntawv kev sib pauv ntawm lub vev xaib. JSON yog ib lub teeb hnyav raws li cov ntawv nyeem, cov ntaub ntawv - sib pauv hom ntawv thiab nws ua lus ywj siab. Nws yog raws li ib feem ntawm JavaScript programming lus thiab nws yooj yim to taub thiab tsim.
Ib tug kuj yuav nug, JSON sawv cev yog dab tsi? JSON , lossis JavaScript Object Notation, yog qhov tsawg kawg nkaus, nyeem tau hom ntawv rau kev teeb tsa cov ntaub ntawv. Nws yog siv feem ntau xa cov ntaub ntawv ntawm tus neeg rau zaub mov thiab lub vev xaib thov, ua lwm txoj hauv kev rau XML. Squarespace siv JSON khaws thiab teeb tsa cov ntsiab lus ntawm qhov chaw tsim nrog CMS.
Ib sab saum toj no, kuv yuav ua li cas qhia txoj hlua rau JSON khoom?
Kauj ruam 2: Hloov Java Daim Ntawv Qhia rau JSON thiab sau JSON rau ib cov ntaub ntawv
- import java.io. File;
- import java.util. HashMap;
- import com.fasterxml.jackson.core.type. TypeReference;
- public class JsonJacksonMapMappingDemo {
- public static void main(String args) {
- map carMap = new HashMap();
Kuv yuav ua li cas daim ntawv qhia JSON rau Java khoom siv Jackson?
Ua piv txwv
- Kauj Ruam 1: suav nrog JACKSON kev vam khom hauv pom.xml. Muaj ntau lub thawv hauv JACKSON lub tsev qiv ntawv.
- Kauj ruam 2: Tsim POJO's. Cov khoom no yuav raug hloov mus rau thiab los ntawm JSON.
- Kauj ruam 3: Hloov Java Object rau JSON thiab sau JSON rau ib cov ntaub ntawv. Hloov cov khoom CarFleet rau hauv JSON thiab sau JSON rau hauv cov ntaub ntawv.
Pom zoo:
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