问题：项目启动后，登录到登录界面可以成功登录，并且可以进行其他查询操作，长时间不操作身份过期后刷新界面变成空白页（理论上应该刷新后是登录界面），浏览器和程序不报错，日志文件中有一个报错，报错如下：
java.sql.SQLException: Io exception: Connection reset
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3649)
at oracle.jdbc.ttc7.TTC7Protocol.open(TTC7Protocol.java:591)
at oracle.jdbc.driver.OracleStatement.open(OracleStatement.java:581)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2851)
at oracle.jdbc.driver.OracleStatement.execute(OracleStatement.java:953)
at com.sinosoft.utility.DBConn.createConnection(DBConn.java:138)
at com.sinosoft.utility.DBConnPool.getConnection(DBConnPool.java:84)
at com.sinosoft.lis.db.LDSysVarDB.query(LDSysVarDB.java:483)
at com.sinosoft.lis.aml.AntiInit.getValueFromSysvar(AntiInit.java:132)
at com.sinosoft.lis.aml.AntiInit.init(AntiInit.java:79)
at org.apache.jsp.logon.main_jsp._jspService(main_jsp.java:63)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:394)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
数据库用的oracle，有两个数据源，大佬们帮孩子看看吧，没有找到代码编辑器，抱歉