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Java

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JDBC ? Hikaricp? ???? PostgreSQL? Java ?? ????? ?????

AddPostgresqljdbcandhikaricpdenciesviamavenorgradle.2.configurehikaricpwithdatabaseUrl, ?? ??, ? ???, ?? ?? ? ??? ??? QloptimizationslikelikedStatementCaching.3

Jul 25, 2025 am 02:15 AM

WebSockets? ???? ??? Java ?? ???? ??

WebsocketSenableLeAL-timeCommunicationInjavaAppsBymainingOpenConnections.1.useJSR356Viajavaee7 ??FrameWorkSlikespring.2. ensureserVersupport (Tomcat8, Jetty9, Wildfly) .3.AdDMAvendENCENCENDENCENDANTONTATEENDPOINTS@DESTRENDPPORIT.4.ManagesESSVIAS

Jul 25, 2025 am 02:03 AM

?? ?? ?????? Google Guava? ?? ???

guavaremainsvaluableformodernjavadevelopers? immutablecollections likeimmutablelistandimmutablest? ?????.

Jul 25, 2025 am 02:01 AM

AWS Lambda ? API ???????? ???? Java

javacanbeefecticallySticallySticallySticallySTICTALYSTICALYSTIALYSTICALYSTICALYSTICTIALSTARTS.1.JavaOffersStrongtyping, goodPost-WarmPerformance ? andgraalvmsPortFornativeComplationTureColdStarts.2AvavacOndeTENSTARTS.

Jul 25, 2025 am 01:55 AM

Java?? ?? ??? ???? ??? ??????

1. System.currentTimeMillis ()? ???? ?? ????? ??? ?? ? ??? ?????. 2. System.nanoTime ()? ???? ???? ????? ??? ?? ? ???? ?????. 3. JMH? ???? ?? ?? ? ?? ????? ??? ?? ????? ??????. Java?? ?? ?? ??? ???? ? ?? ?? ??? ????. ? ??? System.currentTimeMillis ()? ?? ?? ? ?? ?? ???? ?? ????. ? ??? System.nanoTime ()? ???? ? ?? ???? ?? ? ?? ??? ?? ????. ?? ??? ??? ?? ??? ?????. ? ??? j? ???? ????

Jul 25, 2025 am 01:54 AM

Java ?? ????? ?? ? ??

?? ?????? ?? Java ??? ?? ???? ??? ?????. 1. ??, ???, ?? ? ?? ?????? ?? ??? ????? ?? ??? ????? ? ?? ???? ???? Lambda? ???? ??? ??? ?????. 2. ???? ??? ?? ???? ??? ??? ????, ?? ???? ??? ???? ?? ?? ??? ???? ??????. 3. ??? ??? ??? StreamApi? ????, ?? ??? ??,??, ?? ? ?? ??? ????, ????? ??? ????. 4. ?? ??? ????, ?? ?? ?? ??? ?? ??? ????, ?? ??? ?? ??????. 5. ???? ???? ??? ???? ? ??? ? ??? ??? ?? ? ????.

Jul 25, 2025 am 01:45 AM

???? ??? ???? ???? ??

Java??? ??? ???? ???? ???? ???? Array.aslist () ??, Arraylist ???? ???? ??? ??? ?? ????? ???? ??? ?? ?? ??? ???? ?? ?????. 1. Arrays.Aslist (ARR) ??? ?? ???? ???? ?? ?? (? : String [], integer [])? ????? ?? ? ??? ???? ?? ?? ?? ? ? ????. 2. ??? ??? ??? ??, ?? ? ?? ??? ???? NewArrayList (Array.Aslist (ARR))? ?? ?? ? ????. 3. ?? ?? (int [])? ?? ??? ?? ??????.

Jul 25, 2025 am 01:32 AM

Java ?? ????? ??? ??? (I18N)

Java 'sinternationalization (i18N)? ApplicationStroadAptToDifferentLanguages ? RegressingLocaleAndresourceBundle.1.uselocaleobjects (? : EN_US, FR_FR) TOINDIFYGENSANDDOADDOWNDOADDOWNDOADDOWNDOADDOWNDOWNDOWNDOARRRESTIONSANDINGRESOURCEBUNDLES (message_en.properties, messess_fr.propertie

Jul 25, 2025 am 01:32 AM

Java ? Websockets? ??? ?? ???? ??

WebSocketSenAblereAl, BidirectionalCommunicationInItwebapplications, whatessentialporfeatureslikeChatandNotifications;? ??, theAllowserVerStoPushDatainStallyToclients.1.usespringbootwiththespring-boot-starter-webscocketdenclytosimpl

Jul 25, 2025 am 01:31 AM

?? ??? ???? (JCA)? ?? ?? ???

JAVACRYPTOGRAPHYARICITECTION (JCA)? Java ?? ????? ??? ???? ?????? ???? ??? ??? ?????. ???, ??? ? ?? ???? ?? ?? ? ????? ???? ???, ?? ??, ??? ??, ??? ?????, ? ?? ? ?? ??? ?? ??? ?????. 1. Security.getProviders ()? ???? ??? ?????? Sun, Sunjce ?? Bouncycastle? ?? ?? ?? ??? ?? ??? ??????. 2. ? ???? ?? ?? ?? ???? (? : AES-256? ?? JCE? ????.

Jul 25, 2025 am 01:29 AM

Monolith?? ???? ???? : Java ?? ??????? ?????? ??

STARTBYCLEARLYDEFINITYTHIVITIVITIVITION ? STARTBOUNDEDCONTEXTSFROM DOMAIN-DRIVENDETIFINGENDENCENDENCENDENCENDENDENCENDENCERDULESKINGOREDERANDERCERUSERUSTICATION.2.ApplyThestRanglerFigPatternOgradallyselyStradallyStradElyPlacemonOlitHFICVIAANAP

Jul 25, 2025 am 01:22 AM

java ???????

ARM ?????? Java ?? ???? ???

tooptimizejavaapplicationSonarm, selectAtunedjvmlikeazulzuluoramazoncorretto, usejdk17orlater, andtestarm-specificbuilds.next, tu NegarbageCollectionByswitchingtozgcorshenandoah, monitorgclogs ? oloptimizeHeapsize.tend, ExplorEnativeCompilationViagraalvMnati

Jul 25, 2025 am 01:17 AM

java ? ????

???? ??? API ?????? Java ?? ?? ??

Java? ?? ? API ?????? ??? ????? ??, ??, ?? ??, ?? ? ?? ??????? ? ?? ???? ???????. 1. OAUTH2 ?? JWT? ???? ???? ??? ???? Springsecurity Verification ??? ???? ?? ??? ?? ?? ??? ??????. 2. Redis LUA ????? ???? ?? ? ?? ??? ????, ??? ??? ??? ????, ?? ??? ????? ???? ??? ??? ?????. 3. ?? ?? IP, ??? ID ?? ?? ?? ??? ??? ???? ???? ??? MDC? ?? TraceId ?? ??? ?????. 4. HTTPS ??? ??? ????? TLS1.2 ??? ???? ?? ? ?? ????? ??? TLS? ???? ????? ???? ?????? ??? ?????.

Jul 25, 2025 am 01:15 AM

Java? ???? ?? ???? ?? TestContainers ??

TestContainers? ???? Java ?? ????? ?? ???? ???? ??? ??? ??? ? ????. 1. PostgreSQL ? Junitjupiter ??? ?? Maven ?? Gradle? TestContainers ??? ??; 2. ?? ?? ???? ???? @Container? ?? PostgreSQL ????? ???? @DynamicPropertySource? ?? ?????? ?? ??? ???? ???? ???? ??? ????? ??????. 3. ????? Postgres? ??????. SetReus (True) ?????

Jul 25, 2025 am 12:54 AM