我正在嘗試將我的webapp部署到Tomcat容器,但是我得到一個例外,說明找不到我的數據庫的驅動程序.在本地我測試Jetty上的應用程序,驅動程序jar由Maven提供.我將驅動程序jar復制到Tomcat主文件夾中的lib文件夾,但我仍然遇到此異常：

java.sql.SQLException: No suitable driver found for jdbc:sqlserver:

at java.sql.DriverManager.getConnection(DriverManager.java:604) ~[?:1.7.0_21]

at java.sql.DriverManager.getConnection(DriverManager.java:243) ~[?:1.7.0_21]

at com.mypackage.ConnectionFactory.createConnection(ConnectionFactory.java:34) ~[ConnectionFactory.class:?]

at com.mypackage.SimpleWebSession.authenticate(SimpleWebSession.java:63) [SimpleWebSession.class:?]

at org.apache.wicket.authroles.authentication.AuthenticatedWebSession.signIn(AuthenticatedWebSession.java:65) [AuthenticatedWebSession.class:6.15.0]

at com.mypackage.SimpleWebSession.signIn(SimpleWebSession.java:118) [SimpleWebSession.class:?]

at com.mypackage.SignInPage$1.onSubmit(SignInPage.java:67) [SignInPage$1.class:?]

at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1272) [Form.class:6.15.0]

at org.apache.wicket.markup.html.form.Form.process(Form.java:938) [Form.class:6.15.0]

at org.apache.wicket.markup.html.form.StatelessForm.process(StatelessForm.java:96) [StatelessForm.class:6.15.0]

at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:770) [Form.class:6.15.0]

at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:703) [Form.class:6.15.0]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_21]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_21]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_21]

at java.lang.reflect.Method.invoke(Method.java:601) ~[?:1.7.0_21]

at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258) [RequestListenerInterface.class:6.15.0]

at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:216) [RequestListenerInterface.class:6.15.0]

at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:243) [ListenerInterfaceRequestHandler.class:6.15.0]

at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:236) [ListenerInterfaceRequestHandler.class:6.15.0]

at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:862) [RequestCycle$HandlerExecutor.class:6.15.0]

at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) [RequestHandlerStack.class:6.15.0]

at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261) [RequestCycle.class:6.15.0]

at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218) [RequestCycle.class:6.15.0]

at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289) [RequestCycle.class:6.15.0]

at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259) [WicketFilter.class:6.15.0]

at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201) [WicketFilter.class:6.15.0]

at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282) [WicketFilter.class:6.15.0]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [catalina.jar:8.0.8]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:8.0.8]

at org.apache.logging.log4j.core.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:66) [Log4jServletFilter.class:2.0-rc1]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) [catalina.jar:8.0.8]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) [catalina.jar:8.0.8]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) [catalina.jar:8.0.8]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) [catalina.jar:8.0.8]

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) [catalina.jar:8.0.8]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136) [catalina.jar:8.0.8]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:78) [catalina.jar:8.0.8]

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) [catalina.jar:8.0.8]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) [catalina.jar:8.0.8]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526) [catalina.jar:8.0.8]

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1033) [tomcat-coyote.jar:8.0.8]

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:652) [tomcat-coyote.jar:8.0.8]

at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) [tomcat-coyote.jar:8.0.8]

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566) [tomcat-coyote.jar:8.0.8]

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523) [tomcat-coyote.jar:8.0.8]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [?:1.7.0_21]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [?:1.7.0_21]

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.0.8]

at java.lang.Thread.run(Thread.java:722) [?:1.7.0_21]

驅動程序也在WEB-INF / lib中的應用程序的lib文件夾中可能導致異常嗎？我正在使用Java 7和MSSQL JDBC驅動程序的第4版.

更新

如果我寫

try {

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

} catch (final ClassNotFoundException e) {

// Should not happen.

e.printStackTrace();

}

之前,我得到了連接.為什么會這樣？

解決方法:

我想我得到了理由. Tomcat嘗試防止由于某些特定的java / javax apis導致的內存泄漏,似乎sql server驅動程序就是其中之一.如果禁用該功能,則應自動加載驅動程序.要禁用,請修改server.xml JreMemoryLeakPreventionListener條目,如下所示.

標簽：java,sql-server,jdbc,tomcat

來源： https://codeday.me/bug/20191007/1865312.html

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