其他配置都和官方的jfinal_demo_for_maven模版一样的，就是在配置好configPlugin之后运行项目就会报下面的错，求大神帮帮忙！谢谢！
Starting JFinal 3.2
Starting scanner at interval of 5 seconds.
Starting web server on port: 8080
2017-11-17 13:42:35
[ERROR]-[Thread: main]-[com.alibaba.druid.pool.DruidDataSource.init()]: init datasource error, url: jdbc:mysql://localhost/hucai?characterEncoding=utf8&zeroDateTimeBehavior=convertToNull
java.sql.SQLException: java.lang.IllegalAccessError: class sun.reflect.GeneratedConstructorAccessor2 cannot access its superclass sun.reflect.ConstructorAccessorImpl
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:435)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:148)
at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:220)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:142)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1463)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1525)
at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:734)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1060)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1056)
at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:104)
at com.jfinal.plugin.activerecord.TableBuilder.build(TableBuilder.java:43)
at com.jfinal.plugin.activerecord.ActiveRecordPlugin.start(ActiveRecordPlugin.java:226)
at com.jfinal.core.Config.startPlugins(Config.java:107)
at com.jfinal.core.Config.configJFinal(Config.java:53)
at com.jfinal.core.JFinal.init(JFinal.java:63)
at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:49)
at org.eclipse.jetty.servlet.FilterHolder.doStart(FilterHolder.java:119)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:724)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:265)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:706)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:492)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)
at org.eclipse.jetty.server.Server.doStart(Server.java:277)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at com.jfinal.server.JettyServer.doStart(JettyServer.java:131)
at com.jfinal.server.JettyServer.start(JettyServer.java:70)
at com.jfinal.core.JFinal.start(JFinal.java:157)
at com.hucai.common.MyConfig.main(MyConfig.java:65)
2017-11-17 13:42:35
[ERROR]-[Thread: main]-[com.jfinal.core.Config.startPlugins()]: Plugin start error: com.jfinal.plugin.activerecord.ActiveRecordPlugin.
java.sql.SQLException: Error
com.jfinal.plugin.activerecord.ActiveRecordException: java.sql.SQLException: Error
at com.jfinal.plugin.activerecord.TableBuilder.build(TableBuilder.java:55)
at com.jfinal.plugin.activerecord.ActiveRecordPlugin.start(ActiveRecordPlugin.java:226)
at com.jfinal.core.Config.startPlugins(Config.java:107)
at com.jfinal.core.Config.configJFinal(Config.java:53)
at com.jfinal.core.JFinal.init(JFinal.java:63)
at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:49)
at org.eclipse.jetty.servlet.FilterHolder.doStart(FilterHolder.java:119)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:724)
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:265)
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:706)
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:492)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)
at org.eclipse.jetty.server.Server.doStart(Server.java:277)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
at com.jfinal.server.JettyServer.doStart(JettyServer.java:131)
at com.jfinal.server.JettyServer.start(JettyServer.java:70)
at com.jfinal.core.JFinal.start(JFinal.java:157)
at com.hucai.common.MyConfig.main(MyConfig.java:65)
Caused by: java.sql.SQLException: Error
at com.alibaba.druid.pool.DruidDataSource.handleConnectionException(DruidDataSource.java:1330)
at com.alibaba.druid.pool.DruidPooledConnection.handleException(DruidPooledConnection.java:136)
at com.alibaba.druid.pool.DruidPooledStatement.checkException(DruidPooledStatement.java:65)
at com.alibaba.druid.pool.DruidPooledStatement.executeQuery(DruidPooledStatement.java:151)
at com.jfinal.plugin.activerecord.TableBuilder.doBuild(TableBuilder.java:71)
at com.jfinal.plugin.activerecord.TableBuilder.build(TableBuilder.java:47)
... 20 more
Caused by: java.lang.IllegalAccessError: class sun.reflect.GeneratedConstructorAccessor3 cannot access its superclass sun.reflect.ConstructorAccessorImpl
at sun.misc.Unsafe.defineClass(Native Method)
at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:63)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:399)
at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:394)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:393)
at sun.reflect.MethodAccessorGenerator.generateConstructor(MethodAccessorGenerator.java:92)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:55)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.ResultSetImpl.getInstance(ResultSetImpl.java:383)
at com.mysql.jdbc.MysqlIO.buildResultSetWithRows(MysqlIO.java:3140)
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:491)
at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:3118)
at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:2288)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2709)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2677)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2627)
at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1556)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2363)
at com.alibaba.druid.filter.FilterAdapter.statement_executeQuery(FilterAdapter.java:2481)
at com.alibaba.druid.filter.FilterEventAdapter.statement_executeQuery(FilterEventAdapter.java:302)
at com.alibaba.druid.filter.FilterChainImpl.statement_executeQuery(FilterChainImpl.java:2360)
at com.alibaba.druid.proxy.jdbc.StatementProxyImpl.executeQuery(StatementProxyImpl.java:211)
at com.alibaba.druid.pool.DruidPooledStatement.executeQuery(DruidPooledStatement.java:140)
... 22 more
