Sqoop 连接mysql 错误 java.lang.NoClassDefFoundError（已解决）

错误信息

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
        at org.apache.sqoop.manager.MySQLManager.initOptionDefaults(MySQLManager.java:73)
        at org.apache.sqoop.manager.SqlManager.<init>(SqlManager.java:89)
        at com.cloudera.sqoop.manager.SqlManager.<init>(SqlManager.java:33)
        at org.apache.sqoop.manager.GenericJdbcManager.<init>(GenericJdbcManager.java:51)
        at com.cloudera.sqoop.manager.GenericJdbcManager.<init>(GenericJdbcManager.java:30)
        at org.apache.sqoop.manager.CatalogQueryManager.<init>(CatalogQueryManager.java:46)
        at com.cloudera.sqoop.manager.CatalogQueryManager.<init>(CatalogQueryManager.java:31)
        at org.apache.sqoop.manager.InformationSchemaManager.<init>(InformationSchemaManager.java:38)
        at com.cloudera.sqoop.manager.InformationSchemaManager.<init>(InformationSchemaManager.java:31)
        at org.apache.sqoop.manager.MySQLManager.<init>(MySQLManager.java:65)
        at org.apache.sqoop.manager.DefaultManagerFactory.accept(DefaultManagerFactory.java:67)
        at org.apache.sqoop.ConnFactory.getManager(ConnFactory.java:184)
        at org.apache.sqoop.tool.BaseSqoopTool.init(BaseSqoopTool.java:272)
        at org.apache.sqoop.tool.ListDatabasesTool.run(ListDatabasesTool.java:44)
        at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:81)
        at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
        at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
        at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils
        at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        ... 20 more

解决方法:

Sqoop 连接mysql 错误 java.lang.NoClassDefFoundError