Dab tsi yog siv mapper hauv Java?
Dab tsi yog siv mapper hauv Java?

Video: Dab tsi yog siv mapper hauv Java?

Video: Dab tsi yog siv mapper hauv Java?
Video: Leng Yang - Yog Vim Dab Tsi (Official Full Song | Nkauj Tawm Tshiab) 2020/05/24 2024, Kaum ib hlis
Anonim

Jackson Object daim ntawv qhia tuaj yeem cais JSON rau hauv cov khoom ntawm cov chav kawm tsim los ntawm koj, lossis rau hauv cov khoom ntawm JSON ntoo qauv piav qhia tom qab hauv qhov kev qhia no. Los ntawm txoj kev, vim li cas nws hu ua ObjectMapper yog vim nws maps JSON rau hauv Java Cov khoom (deserialization), los yog Java Cov khoom rau hauv JSON (serialization).

Tsis tas li ntawd, dab tsi yog siv cov chav kawm mapper hauv Java?

Nws muab ib qho yooj yim API los hloov a Java cov khoom ntawm ib hom mus rau hauv ib yam khoom ntawm lwm hom. Caij nplooj ntoos hlav moj khaum: Caij nplooj ntoos hlav muaj kev txhawb nqa zoo heev rau PropertyEditors, uas tuaj yeem ua tau siv hloov cov khoom mus rau / los ntawm Strings.

Ib tug kuj yuav nug, Orika Mapper yog dab tsi? Orika yog Java Bean daim ntawv qhia lub moj khaum uas recursively luam cov ntaub ntawv los ntawm ib yam khoom mus rau lwm tus. Nws tuaj yeem muaj txiaj ntsig zoo thaum tsim cov ntawv thov ntau txheej. Txawm li cas los xij, nws tuaj yeem siv los ua kom yooj yim cov txheej txheem ntawm daim ntawv qhia nruab nrab ntawm ib txheej khoom thiab lwm yam.

Tsuas yog li ntawd, dab tsi yog qhov khoom mapper hauv Java?

ObjectMapper yog lub ntsiab actor chav kawm ntawm Jackson tsev qiv ntawv. ObjectMapper chav kawm ObjectMapper muab kev ua haujlwm rau kev nyeem ntawv thiab sau JSON, xws li mus rau thiab los ntawm POJOs (Plain Old Java Objects ), lossis mus rau thiab los ntawm lub hom phiaj dav dav JSON Tsob Ntoo Model (JsonNode), nrog rau cov haujlwm muaj feem cuam tshuam rau kev hloov pauv.

Dab tsi yog chav kawm mapper?

Cov Mapper chav kawm yog hom generic, nrog plaub yam tsis raug cai uas qhia meej cov tswv yim tseem ceeb, tus nqi tawm tswv yim, tso tawm qhov tseem ceeb thiab cov nqi tso tawm hom ntawm daim ntawv qhia muaj nuj nqi.

Pom zoo: