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org.springframework.dao.DataIntegrityViolationException: ### Error updating database.  Cause: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'content' at row 1### The error may exist in cn/hadron/doc/dao/FileDao.java (best guess)### The error may involve cn.hadron.doc.dao.FileDao.saveFile-Inline### The error occurred while setting parameters### SQL: insert into files(fileName,fileSize,fileDir,category,content,md5) values(?,?,?,?,?,?)### Cause: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'content' at row 1; Data truncation: Data too long for column 'content' at row 1; nested exception is com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'content' at row 1	at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:104)	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)	at com.sun.proxy.$Proxy58.insert(Unknown Source)	at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:278)	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:59)	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58)	at com.sun.proxy.$Proxy63.saveFile(Unknown Source)	at cn.hadron.doc.service.impl.FileServiceImpl.saveFile(FileServiceImpl.java:29)	at cn.hadron.doc.controller.FileController.upload(FileController.java:90)	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.doInvoke(InvocableHandlerMethod.java:189)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:748)Caused by: com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'content' at row 1	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3976)	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530)	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683)	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2495)	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1903)	at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1242)	at com.zaxxer.hikari.pool.ProxyPreparedStatement.execute(ProxyPreparedStatement.java:44)	at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.execute(HikariProxyPreparedStatement.java)	at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47)	at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50)	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)	... 61 more

解决办法，因为text类型是可变长度的字符串，最多65535个字符，所有，最好是把字段类型设置为longtext，最多存放4294967295个字符

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