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Java

??? ???? Java Rest API ??

AddSpringsecurityandjwtdependemenciesinpom.xmltoenablesecurityandtokenhandling.2.createajwtrequestfiltertointerceptrects, extractandvalidatejwttokens, andsetauthenticationinthesecuritycontext.3.configuresecurityConfigTodisbeCsrf, publicacceSso

Jul 28, 2025 am 02:13 AM

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

?? Java ??? ??? ?? JVM ?? ????, ?? ?????, ?? ??, ?? ?? ? ??? ????? ?? ??? ?????. 1. JMM (Java Memory Model)? ??? ?? ???, ??? ? ??? ?? ??? ?????. ??? ???? ???? ?? ???? ??? CPU ??? ?? ???? ??? ?? ??? ??? ?? ??? ???? ?????. G1GC? ? ? ? ?? ??? ?? ?? ????? ?????. ?? ?????? ??? ?? ???? ?? ?????. ZGC? ?? ???? ?? ??? ???? ?? ? ??? ?? ??? ???? ?? ?? ??? ? ??? ????, ?? ?? ?? ???? ?????. 2. ConsurenThashMap? ???? ???-?? LRU ??? ??????

Jul 28, 2025 am 02:12 AM

java ???? ??

Java 17 ??? ??? ??

Java17 introduceDkeyFeaturesLikeSealedClasses, PatternMatchingForswitch (????), TheAppleTapi ??, AnewMacosrenderingPipleline, JdkinalsByDefault ? MemoryApi;

Jul 28, 2025 am 02:03 AM

Java ? ??? ?? ?? : Spring Boot, Micronaut ? Quarkus

quarkuswinsfornativecompilationand fasteststartup, 2.micronautexcelsinlow-memoryjvmscenarios, 3.springbootleadsinecosystemsizeandeasoftion, 4. quarkusandmicronautoffersuperiordeveloperexperienceperiver withlivereload, 5. forcloud-native-native-native quarkerless

Jul 28, 2025 am 01:51 AM

?? ? Java ?? ??????? Eclipse Vert.x ?? ??

eclipsevert.xisAlightweight, ??? ?? ??? ?? ??, ???-??? ? JavaApplicationsonejvm.1.itusesaneventloopmodeltoHandleConcurrency withBlocking

Jul 28, 2025 am 01:50 AM

??? ????? Vert.x

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

ProjectLoominTroduceSweightWeightWealThreadStojava, high-throughputconcurrentApplicationDevelopment.1.VirtualThreadSarelightsweight, JVM-ManagedThreadsThatenAblesVeConcurrency? ?? theoverHeadoFOS-backedPlatFormthHreads.

Jul 28, 2025 am 01:48 AM

??? Java ????? ??

gargagecollectionsingobjectpooling, stackallocationviaescapeanalysis, primitivececollection, andlimitingobjectchurn, whilleginglow-pausegcs likezgcorshenandoah.2.useringbuffersandlock-freedattructuressuchasthedisruptorpatternforhhhighhhghhhhgrou grouth

Jul 28, 2025 am 01:37 AM

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

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

Jul 28, 2025 am 01:34 AM

php java

Null-Safe ?? ? Java?`?? '? ?? ?? ???

?? ??? ??? ???? ??? ?? ???? ?????? ?? ?? ? ? ??? ???? ???????. 2. Map/FlatMap? ???? ??? ?? ??? ???? ?? ? ? ??? ?????. 3. ???? ?? ???? ???? ?? Orelse ?? Orelseget? ??????. 4. ??? ???? ????? IFPRESENT? ???? ???? ???? ?? ???? ??????. 5. ??? ??? ?? ?? ??? ?? ? ? ????. ?? ???? ?? ???? ?? ?? ?? ?? NULL? ???? ???? .empty (). ?? ??? ??? ?? ?? ????? ??? ???? ?? ?? ???????. ??? ??? ????? ???? ?? ? ??? ??? ?????.

Jul 28, 2025 am 01:25 AM

??? ?? ??????? Java 21 ?? ??? ??? ?

Java21? ?? ???? ??? ?? ????? ??? ?? ??????. 1. JVM? ?? ?? ???? ????? ???? ??? ?? ?? ??? ?? ??? ? ????. 2. ? ???, ???? ??? ? ?? ??? ?? I/O ??? ????? ?????. 3. ?? ?? ??? ?? ??? ??? ??? ?? ?????? ???????. 4. ?? ??? ??? ?? ?? ??? ???? ?? ??? ? ??? ???? ?? ????. 5. CPU ??? ? ???? ???? ??? ??? ??? ?? ?? ???? ?? ????????. 6. SpringBoot6, Tomcat ? Jetty? ?? ?? ??? ??? ???? ??? ?? ??? ? ? ????. 7. JDBC? ?? ?? ??? ??? ???? ???? ?? ???? ??? ????.

Jul 28, 2025 am 01:20 AM

Java Classloader? ?? ?? : ??? ??

TheJavaclassLoaderIsacoreCorecorecorecorecorecorecorecorecorcomponome? hatDynamicallyLoadSclasseTruntime, enablefeatureslikemodularityandhotDeployment.2.itoperatesTHROUGHAHIERARCHYOFRIMARYCLASSLODERS : bootStrap (loadScorejavaClasses), ??? (handlesteStionsixectories)

Jul 28, 2025 am 01:18 AM

Java ?? ??? ??? ?? ??? ? ??? : SLF4J, LOGBACK ? LOG4J2

SLF4J? ?? ???, ??? ? ?? 4J2? ?? ????, ??? ?? ??? ???????. 1. ????? SpringBoot ?? ????? ?? ?? ? ??? ???? ?? SLF4J ???? ???? ?? ????. 2. ? ??? ???? SLF4J LOG4J2? ???? ? ?? ??? ??? ?? ??? ??????. 3. ???? ????? ??? ? ??? ??? ?? Log4J2? JSON ???? ?? LogBack? Logstash-Logback-Encoder? ?? ? ? ????. 4. ?? ???? ?????? ? ? log4j1.x? log4j2? ??????????. ?? SLF4J ???? ??? ?? ?? ??? ???? {} ?? ???? ???????.

Jul 28, 2025 am 01:08 AM

Java Nio ? ??? I/O? ?? ?? ???

Javanio ? Asynchronousi/O? ?? ??? ? ?? ??? ?? ????? ?????. 1. NIO? ??, ?? ? ???? ?? ? ??? I/O? ???? ?? ??? ?? ??? ??? ???? ?? ???? ??? ?????. 2. Asynchronousi/O (AIIO)? ?? ?? ??? ??????, ???? ??? ??? ????, ?? ? ?? ??? ?? ???? ?????. 3. ?? I/O ? ??? ?? ?? NIO FiLechannel ?? ? ??? ???? ???? NIO ???? ???? ?? AIO? ??? ??? ?? ? ? ????. 4. ?? ???? Netty? ?? ??? ??? ?????.

Jul 28, 2025 am 01:04 AM