JAVA编译过程中的一些错误解决方案_fatal error compiling: java.lang.exceptionininitia

报错信息

 Fatal error compiling: java.lang.ExceptionInInitializerError: Unable to make field private com.sun.tools.javac.processing.JavacProcessingEnvironment$DiscoveredProcessors com.sun.tools.javac.processing.JavacProcessingEnvironment.discoveredProcs accessible: module jdk.compiler does not "opens com.sun.tools.javac.processing" to unnamed module @402c3dce -> [Help 1]
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解决方案

先用mvn -v查看mvn版本信息，如果jdk设置了 jdk16，则说明jdk版本过高，需要降级。建议使用jdk8.

报错信息

Failed to execute goal on project xxx-base-core: Could not resolve dependencies 
for project org.dekunframework.boot:xxxx-base-core:jar:2.4.0: The following artifacts 
could not be resolved: org.hibernate:hibernate-re:jar:2.3.07, 
org.jeecgframework.boot:codegenerate:jar:1.2.5: Cannot access nexus-aliyun 
(http://maven.aliyun.com/nexus/content/groups/public) in offline mode and the artifact 
org.hibernate:hibernate-re:jar:2.3.07 has not been downloaded from it before. -> [Help 1]
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解决方案

mvn换镜像源：

<mirrors>
       <mirror>
            <id>nexus-aliyun</id>
            <mirrorOf>*,!jeecg,!jeecg-snapshots,!getui-nexus</mirrorOf>
            <name>Nexus aliyun</name>
            <url>https://maven.aliyun.com/repository/public</url>
        </mirror> 
 </mirrors>
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