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Java中MapStruct映射處理器報(bào)錯(cuò)的問(wèn)題解決

更新時(shí)間：2024年03月01日 11:43:25 作者：奇遇少年

MapStruct是一個(gè)強(qiáng)大的Java映射框架,它能夠在編譯時(shí)生成映射代碼,,本文主要介紹了Java中MapStruct映射處理器報(bào)錯(cuò)的問(wèn)題解決,具有一定的參考價(jià)值,感興趣的可以了解一下

引言

MapStruct是一個(gè)強(qiáng)大的Java映射框架，它能夠在編譯時(shí)生成映射代碼，提高了映射的性能。然而，有時(shí)候在使用MapStruct時(shí)可能會(huì)遇到一些問(wèn)題，其中之一就是java: Internal error in the mapping processor: java.lang.NullPointerException錯(cuò)誤。

錯(cuò)誤原因

這個(gè)錯(cuò)誤通常是由于MapStruct在處理映射時(shí)出現(xiàn)了空指針異常引起的?？赡艿脑蚴牵?br />版本兼容性問(wèn)題：使用不兼容的MapStruct版本可能導(dǎo)致內(nèi)部處理器錯(cuò)誤。

 <!--MapStruct 依賴(lài)-->
 <dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct</artifactId>
      <version>1.3.1.Final</version>
  </dependency>
  <!--MapStruct 注解處理器-->
  <dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct-processor</artifactId>
      <version>1.3.1.Final</version>
  </dependency>

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 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:248) 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$0(BuildMain.java:219) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:748)

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解決方案

將 MapStruct 更新到 1.4.1.Final 或更高版本

<!--MapStruct 依賴(lài)-->
<dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct</artifactId>
      <version>1.4.1.Final</version>
  </dependency>
  <!--MapStruct 注解處理器-->
  <dependency>
      <groupId>org.mapstruct</groupId>
      <artifactId>mapstruct-processor</artifactId>
      <version>1.4.1.Final</version>
  </dependency>

在這里插入圖片描述

如果還出現(xiàn)以下錯(cuò)誤

java:No property named "xxx" exists in source parameter(s). Did you mean "null"?

在這里插入圖片描述

引入依賴(lài)解決

<dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok-mapstruct-binding</artifactId>
      <version>0.2.0</version>
</dependency>

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