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.XXXDaoat 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/