已解决java internal error in the mapping processor java.lang.nullpointerexception异常的正确解决方法，亲测有效！！！-爱代码爱编程
已解决java Internal error in the mapping processor java.lang.NullPointerException异常的正确解决方法，亲测有效！！！
报错问题
粉丝群里面的一个小伙伴敲代码时发生了报错（当时他心里瞬间凉了一大截，跑来找我求助，然后顺利帮助他解决了，顺便记录一下希望可以帮助到更多遇到这个bug不会解决的小伙伴），报错信息如下：
java: Internal error in the mapping processor: java.lang.NullPointerException
at org.mapstruct.ap.internal.processor.DefaultVersionInformation.createManifestUrl(DefaultVersionInformation.java:182)
at org.mapstruct.ap.internal.processor.DefaultVersionInformation.openManifest(DefaultVersionInformation.java:153)
at org.mapstruct.ap.internal.processor.DefaultVersionInformation.getLibraryName(DefaultVersionInformation.java:129)
at org.mapstruct.ap.internal.processor.DefaultVersionInformation.getCompiler(DefaultVersionInformation.java:122)
at org.mapstruct.ap.internal.processor.DefaultVersionInformation.fromProcessingEnvironment(DefaultVersionInformation.java:95)
at org.mapstruct.ap.internal.processor.DefaultModelElementProcessorContext.<init>(DefaultModelElementProcessorContext.java:50)
at org.mapstruct.ap.MappingProcessor.processMapperElements(MappingProcessor.java:218)
at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:156)
at org.jetbrains.jps.javac.APIWrappers$ProcessorWrapper.process(APIWrappers.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jetbrains.jps.javac.APIWrappers$1.invoke(APIWrappers.java:213)
at org.mapstruct.ap.MappingProcessor.process(Unknown Source)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91)
at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035)
at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176)
at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170)
at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856)
at com.sun.tools.javac.main.Main.compile(Main.java:523)
at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129)
at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138)
at org.jetbrains.jps.javac.JavacMain.compile(JavacMain.java:231)
at org.jetbrains.jps.incremental.java.JavaBuilder.compileJava(JavaBuilder.java:501)
at org.jetbrains.jps.incremental.java.JavaBuilder.compile(JavaBuilder.java:353)
at org.jetbrains.jps.incremental.java.JavaBuilder.doBuild(JavaBuilder.java:277)
at org.jetbrains.jps.incremental.java.JavaBuilder.build(JavaBuilder.java:231)
at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1441)
at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:1100) at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1224) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:1066) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:832) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:419) at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:183) at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:132) at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:302) at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:132) at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:219) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
在使用MapStruct，idea2020.3版本在build项目的时候出现错误：java: Internal error in the mapping processor: java.lang.NullPointerException
解决方法
解决方法如下
Setting -->Build,Execution,Deployment -->Compiler -->User-local build加上参数：
-Djps.track.ap.dependencies=false
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