我想在我的IntelliJ Idea中启用AspectJ编译器，因为我希望在编译时就结合几个方面。
同时，我在代码库中使用Lombok和Mapstruct。
这2个程序需要附加的注释处理，这必须在ajc插入之前进行。
我为Lombok和Mapstruct安装了两个插件。它们独立运行良好，正在生成源代码。但是，当我启用ajc并勾选Enable annotation processing options，然后构建一个项目时，我得到：
Error:(9, 0) ajc: Internal error in the mapping processor: java.lang.NullPointerException at org.aspectj.org.eclipse.jdt.internal.compiler.lookup.FieldBinding.sourceField(FieldBinding.java:425) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.determineSourceStart(TypeElementImpl.java:108) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.getSourceStart(TypeElementImpl.java:72) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.compare(TypeElementImpl.java:65) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl$SourceLocationComparator.compare(TypeElementImpl.java:1) at java.util.TimSort.countRunAndMakeAscending(TimSort.java:360) at java.util.TimSort.sort(TimSort.java:234) at java.util.Arrays.sort(Arrays.java:1512) at java.util.ArrayList.sort(ArrayList.java:1462) at java.util.Collections.sort(Collections.java:175) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.model.TypeElementImpl.getEnclosedElements(TypeElementImpl.java:166) at org.mapstruct.ap.internal.util.workarounds.SpecificCompilerWorkarounds.replaceTypeElementIfNecessary(SpecificCompilerWorkarounds.java:99) at org.mapstruct.ap.internal.util.Executables.getAllEnclosedExecutableElements(Executables.java:99) at org.mapstruct.ap.internal.model.common.Type.getAllMethods(Type.java:633) at org.mapstruct.ap.internal.model.common.Type.getPropertyReadAccessors(Type.java:496) at org.mapstruct.ap.internal.model.BeanMappingMethod$Builder.build(BeanMappingMethod.java:168) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.getMappingMethods(MapperCreationProcessor.java:376) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.getMapper(MapperCreationProcessor.java:151) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.process(MapperCreationProcessor.java:122) at org.mapstruct.ap.internal.processor.MapperCreationProcessor.process(MapperCreationProcessor.java:76) at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:283) at org.mapstruct.ap.MappingProcessor.processMapperTypeElement(MappingProcessor.java:263) at org.mapstruct.ap.MappingProcessor.processMapperElements(MappingProcessor.java:221) at org.mapstruct.ap.MappingProcessor.process(MappingProcessor.java:156) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.handleProcessor(RoundDispatcher.java:139) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.RoundDispatcher.round(RoundDispatcher.java:121) at org.aspectj.org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:159) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:931) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:437) at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:417) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performCompilation(AjBuildManager.java:1036) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performBuild(AjBuildManager.java:272) at org.aspectj.ajdt.internal.core.builder.AjBuildManager.batchBuild(AjBuildManager.java:185) at com.intellij.lang.aspectj.build.AjJpsCompiler.doBuild(AjJpsCompiler.java:249) at com.intellij.lang.aspectj.build.AjJpsCompiler.build(AjJpsCompiler.java:119) at com.intellij.lang.aspectj.build.AjTranslatingBuilder.doBuild(AjTranslatingBuilder.java:114) at com.intellij.lang.aspectj.build.AjBuilderBase.build(AjBuilderBase.java:74) at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1328) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:1008) at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:1075) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:969) at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:798) at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:380) at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:178) at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139) at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:302) at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:135) at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:228) at org.jetbrains.jps.service.impl.SharedThreadPoolImpl.lambda$executeOnPooledThread$0(SharedThreadPoolImpl.java:42) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)
此外，我还看到了许多其他ajc编译错误，因为它无法定位Lombok应该生成的方法。
我该如何解决这些问题？
答案 0 :(得分：3)
在 IntelliJ 中启用 Post-compile weave mode 为我解决了这个问题 (https://www.jetbrains.com/help/idea/using-the-aspectj-ajc-compiler.html)。
答案 1 :(得分：1)
嗨，我有类似的问题。
解决方法是让Aspectj-maven-plugin仅在编译类后才开始编织。
这里https://www.mojohaus.org/aspectj-maven-plugin/examples/weaveDirectories.html
有更详细的描述我需要：
（1）通过<weaveDirectories >指定已编译的类所在的文件夹
（2）将maven-compiler-plugin生命周期的阶段更改为“进程类”或更高版本。
这就是我的pom的样子。
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${org.projectlombok.version}</version>
</path>
</annotationProcessorPaths>
<compilerArgs>
<compilerArg>-Amapstruct.defaultComponentModel="spring"</compilerArg>
<compilerArg>-Amapstruct.unmappedTargetPolicy=ERROR</compilerArg>
<compilerArg>-Amapstruct.suppressGeneratorTimestamp=true</compilerArg>
<compilerArg>-Amapstruct.suppressGeneratorVersionInfoComment=true</compilerArg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<configuration>
<showWeaveInfo>${showWeaveInfo}</showWeaveInfo>
<showWeaveInfo>true</showWeaveInfo>
<Xlint>ignore</Xlint>
<complianceLevel>${java.compiler.version}</complianceLevel>
<encoding>UTF-8</encoding>
<verbose>false</verbose>
<verbose>true</verbose>
<forceAjcCompile>true</forceAjcCompile>
<sources/>
<weaveDirectories>
<weaveDirectory>${project.build.directory}/classes</weaveDirectory>
</weaveDirectories>
<aspectLibraries>
<aspectLibrary>
<groupId>com.lib.test</groupId>
<artifactId>test1</artifactId>
</aspectLibrary>
<aspectLibrary>
<groupId>com.lib.test2</groupId>
<artifactId>test2</artifactId>
</aspectLibrary>
</aspectLibraries>
</configuration>
<executions>
<execution>
<phase>process-classes</phase>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>