cassandra mvn compile编译错误问题处理

编译项目出现如下错误：

DEBUG com.datastax.oss.driver.internal.core.util.Reflection - Could not load com.mango.mgimdao.cassandra.dao.XXXDao: java.lang.ClassNotFoundException: com.mango.mgimdao.cassandra.dao.XXXDao java.lang.ClassNotFoundException: com.mango.mgimdao.cassandra.dao.XXXDao at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.datastax.oss.driver.internal.core.util.Reflection.loadClass(Reflection.java:55) at com.datastax.oss.driver.internal.mapper.processor.dao.DaoMethodGenerator.isFromClassFile(DaoMethodGenerator.java:235) at com.datastax.oss.driver.internal.mapper.processor.dao.DaoMethodGenerator.validateCqlNamesPresent(DaoMethodGenerator.java:196) at com.datastax.oss.driver.internal.mapper.processor.dao.DaoQueryMethodGenerator.generate(DaoQueryMethodGenerator.java:113) at java.util.Optional.flatMap(Optional.java:241) at com.datastax.oss.driver.internal.mapper.processor.dao.DaoImplementationGenerator.getContents(DaoImplementationGenerator.java:330) at com.datastax.oss.driver.internal.mapper.processor.SingleFileCodeGenerator.generate(SingleFileCodeGenerator.java:43) at com.datastax.oss.driver.internal.mapper.processor.MapperProcessor.processAnnotatedTypes(MapperProcessor.java:117) at com.datastax.oss.driver.internal.mapper.processor.MapperProcessor.process(MapperProcessor.java:83) 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.codehaus.plexus.compiler.javac.JavaxToolsCompiler.compileInProcess(JavaxToolsCompiler.java:126) at org.codehaus.plexus.compiler.javac.JavacCompiler.performCompile(JavacCompiler.java:174) at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:1134) at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:187) at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116) at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80) at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51) at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106) at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863) at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288) at org.apache.maven.cli.MavenCli.main(MavenCli.java:199) 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.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415) at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

虽然上面的问题并不影响编译后install，但是总是要处理下：

解决方案：在pom.xml中加入如下：

<project> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <!-- (or higher) --> <target>1.8</target> <!-- (or higher) --> <annotationProcessorPaths> <path> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> </path> <path> <groupId>com.datastax.oss</groupId> <artifactId>java-driver-mapper-processor</artifactId> <version>4.7.2</version> </path> </annotationProcessorPaths> </configuration> </plugin> </plugins> </build> </project>

参考连接：https://docs.datastax.com/en/developer/java-driver/4.6/manual/mapper/config/