【解决方案】使用mapStruct时，编译报错：java: Internal error in the mapping processor:java.lang.NullPointerException

原创

程序员小2 2023-04-01 08:08:40 博主文章分类：java ©著作权

文章标签 java intellij-idea maven 解决方案 Java 文章分类 HarmonyOS 后端开发

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背景

mapStruct的作用：
MapStruct是一个代码生成器，简化了不同的Java Bean之间映射的处理。我们在写代码时经常涉及到VO、DTO、BO、DO之间实体的转换，有了mapStruct之后，可以让不同实体之间的转换变的简单。我们只需要按照约定的方式进行配置即可。
但是最近在使用mapStruct时，IDEA编译报如下错误：

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)