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$1.invoke(APIWrappers.java:213) at lombok.launch.AnnotationProcessorHider$AnnotationProcessor.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:498) at org.jetbrains.jps.incremental.java.JavaBuilder.compile(JavaBuilder.java:350) at org.jetbrains.jps.incremental.java.JavaBuilder.doBuild(JavaBuilder.java:274) at org.jetbrains.jps.incremental.java.JavaBuilder.build(JavaBuilder.java:228) 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)
建议断点调试，尝试自己解决。单纯的粘贴上来错误信息，很难得到答案
这个问题十有八九是因为你用mapstructer，后来你又修改了你的实体类，但是没有重新编译。 重新编译你的项目即可。如果是maven项目，先clean 再package
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