com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: Too many connections
最简单的办法是因为你的my.ini中设定的并发连接数太少或者系统繁忙导致连接数被占满解决方式：打开MySQL安装目录打开MY.INI找到max_connections默认是100.--实例WINDOWS解决mysql Errno.:1040错误XXXXinfo:CannotconnecttoMySQLserv...
注解 javax.validation.constraints下的注解
@NotBlank,@NotNoll,@NotEmpty实体字段校验之间的区别简单的来说字符串用@NotBlank基本类型用@NotNoll集合类型@NotEmpty...
ORA-00001: unique constraint violated异常处理
程序中保存数据时报错，ORA-00001:uniqueconstraint(xxxx)violated先是查看数据库结构，最近也没什么改动，开发环境也正常，测试环境就报这个错后来发现主键id是自增的，查询序列的下个值 selecttable_seq.nextval fromdual发现这...
ORA-41666: XML schema validation failed when validating against string
文档解释ORA-41666:XMLschemavalidationfailedwhenvalidatingagainststringCause:TheuserinputhasundefinedelementorattributeaccordingtotheprovidedXMLschemadefinition.Acti...
ORA-47402: incorrect evaluation options value for Factor string
文档解释ORA-47402:incorrectevaluationoptionsvalueforFactorstringCause:ThefactorevaluationsoptionsvalueisincorrectAction:Pleasereviewthefactordefinitionandcorrectita...
ORA-32486: unsupported operation in recursive branch of recursive WITH clause
文档解释ORA-32486:unsupportedoperationinrecursivebranchofrecursiveWITHclauseCause:TherecursivecomponentoftheUNIONALLinarecursiveWITHclauseelementusedanoperationthat...
ORA-38734: Flashback log is inconsistent; belongs to another database.
文档解释ORA-38734:Flashbacklogisinconsistent;belongstoanotherdatabase.Cause:ThedatabaseIDintheflashbackdatabaselogfiledidnotmatchthedatabaseIDinthecontrolfile.Actio...
ORA-32313: REFRESH FAST of “string”.”string” unsupported after PMOPs
文档解释ORA-32313:REFRESHFASTof“string”.”string”unsupportedafterPMOPsCause:APartitionMaintenanceOperation(PMOP)hasbeenperformedonadetailtabl...
ORA-28556: authorization insufficient to access table
文档解释ORA-28556:authorizationinsufficienttoaccesstableCause:Aqueryattemptedtoaccessatableinthenon-Oraclesystemthatiseitherprivilegedorhasprivilegedcolumns.Action:...