java.sql.SQLException: Unsupported character encoding 'utf8mb4'.

四月 12, 2017 3:47:52 下午 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet [SpringMVC] in context with path [/yuyi] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

### Error updating database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Unsupported character encoding 'utf8mb4'.)

### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Unsupported character encoding 'utf8mb4'.)] with root cause

java.sql.SQLException: Unsupported character encoding 'utf8mb4'.

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1084)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:973)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:918)

at com.mysql.jdbc.StringUtils.getBytes(StringUtils.java:572)

at com.mysql.jdbc.StringUtils.getBytes(StringUtils.java:717)

at com.mysql.jdbc.Buffer.writeStringNoNull(Buffer.java:700)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2720)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2832)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2781)

at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1569)

at com.mysql.jdbc.ConnectionImpl.loadServerVariables(ConnectionImpl.java:4218)

at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3613)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2554)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2321)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

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:409)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)

at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)

at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)

at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247)

at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221)

at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)

at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)

at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)

at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:81)

at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:67)

at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)

at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)

at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:47)

at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:105)

at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:71)

at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:152)

at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:141)

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.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)

at com.sun.proxy.$Proxy13.insert(Unknown Source)

at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:240)

at com.wanyu.frame.base.BaseMyIbatisDao.save(BaseMyIbatisDao.java:198)

at com.wanyu.yuyi.dao.CommentDao.saveOrUpdate(CommentDao.java:29)

at com.wanyu.yuyi.dao.CommentDao.saveOrUpdate(CommentDao.java:1)

at com.wanyu.frame.base.BaseManager.saveOrUpdate(BaseManager.java:68)

at com.wanyu.yuyi.controller.CommentController.AddConment2(CommentController.java:274)

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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1524)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1480)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:745)

问题原因：

产生这个问题的原因是为解决  表情的问题，尝试在JDBC连接字符串中指定编码，但是不支持。

解决方法：

参考：MySQL 解决 emoji表情 的方法，使用utf8mb4 字符集(4字节 UTF-8 Unicode 编码)

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