Maven 整合 Mybatis 的逆向工程时的问题总结

一、运行环境

  JDK 版本 1.8.0_171

二、问题日志

[INFO] Scanning for projects...
[INFO] 
[INFO] -------------------------< com:mybatis-maven >--------------------------
[INFO] Building mybatis-maven 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- mybatis-generator-maven-plugin:1.3.0:generate (default-cli) @ mybatis-maven ---
java.lang.RuntimeException: Exception getting JDBC Driver
	at org.mybatis.generator.internal.db.ConnectionFactory.getDriver(ConnectionFactory.java:84)
	at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(ConnectionFactory.java:53)
	at org.mybatis.generator.config.Context.getConnection(Context.java:487)
	at org.mybatis.generator.config.Context.introspectTables(Context.java:396)
	at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:222)
	at org.mybatis.generator.maven.MyBatisGeneratorMojo.execute(MyBatisGeneratorMojo.java:184)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:154)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:146)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:956)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:290)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:194)
	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)
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at org.mybatis.generator.internal.ObjectFactory.externalClassForName(ObjectFactory.java:89)
	at org.mybatis.generator.internal.db.ConnectionFactory.getDriver(ConnectionFactory.java:81)
	... 27 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.066 s
[INFO] Finished at: 2018-10-20T12:45:10+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.0:generate (default-cli) on project mybatis-maven: Exception getting JDBC Driver -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

三、pom.xml 内容

	
		org.mybatis.generator
		mybatis-generator-maven-plugin
		1.3.2
		
			
	            mysql
	            mysql-connector-java
	            5.1.35
	        	
		
		
			true
		
	

四、问题解决

  当时我排查了很久，将配置文件什么的都查了一遍，最后查出是因为 Mysql 的驱动程序版本是5.1.35 ，把它改成其他接近的版本就可以解决问题，比如：5.1.38，如果不行，建议上下多换几个版本试一试。