statement.isClose（）拋出IllegalAccess異常，因爲該語句是關閉的？

我有下面的代碼。相當標準的東西。但是，我在if（！stmt.isClose（））行中收到了非法訪問異常......錯誤表明這是因爲語句已關閉。這不是該方法的要點嗎？任何人對此有一些想法？statement.isClose（）拋出IllegalAccess異常，因爲該語句是關閉的？

Connection conn = dataSource.getConnection(); 
conn.setAutoCommit(false); 
Statement stmt = conn.createStatement(); 
try { 
    stmt.executeUpdate(updateQuery1); 
    stmt.executeUpdate(updateQuery2); 
    stmt.executeUpdate(updateQuery3); 
    conn.commit(); 
    try { 
     if (!stmt.isClosed()) { 
      stmt.close(); 
     } 
     if (!conn.isClosed()) { 
      conn.close(); 
     } 
    } catch (Throwable ignored) { 
} catch(Throwable ignored) { 
}

499285 java.lang.IllegalAccessError: org.apache.tomcat.dbcp.dbcp.DelegatingStatement.isClosed()Z 499286 at com.millennialmedia.enterprise.services.impl.CampaignUtilServiceImpl.resetExceptionCampaign(CampaignUtilServiceImpl.java:80) 499287 at com.millennialmedia.rest.services.CampaignUtilRESTService$1.process(CampaignUtilRESTService.java:55) 499288 at com.millennialmedia.rest.services.CampaignUtilRESTService$1.process(CampaignUtilRESTService.java:49) 499289 at com.millennialmedia.services.util.Processor.doProcess(Processor.java:98) 499290 at com.millennialmedia.rest.services.CampaignUtilRESTService.resetExceptionCampaign(CampaignUtilRESTService.java:49) 499291 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 499292 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 499293 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 499294 at java.lang.reflect.Method.invoke(Method.java:597) 499295 at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60) 499296 at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchPro 499297 at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) 499298 at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288) 499299 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) 499300 at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) 499301 at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) 499302 at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) 499303 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469) 499304 at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400) 499305 at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349) 499306 at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339) 499307 at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416) 499308 at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) 499309 at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699) 499310 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 499311 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 499312 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 499313 at com.millennialmedia.instrumentation.MethodInvocationFilter._doFilter(MethodInvocationFilter.java:20) 499314 at com.millennialmedia.instrumentation.MethodInvocationFilter.doFilter(MethodInvocationFilter.java:31) 499315 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 499316 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 499317 at com.millennialmedia.session.BaseAuthenticatedUserFilter.doFilter(BaseAuthenticatedUserFilter.java:249) 499318 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 499319 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 499320 at com.millennialmedia.session.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:57) 499321 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 499322 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 499323 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 499324 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 499325 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) 499326 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) 499327 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 499328 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 499329 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) 499330 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) 499331 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)

來源

2012-09-17 jgerman

你是否禁用了自動提交模式？只有在自動提交模式被禁用時，才應使用commit（）方法。 – PermGenError

@ chaitanya10答案在代碼中。 – EJP

@downvoter請解釋。 – EJP

我不明白爲什麼你甚至測試它。聲明不可能在這個時候被關閉，所以不要測試它，關閉它。同上連接。事實上，如果已關閉，那麼這兩個關閉方法都將被指定爲什麼也不做。

不要讓百合花鍍金。

來源

2012-09-17 22:50:58 EJP

好吧，它在這一點顯然是封閉的，這就是爲什麼我得到異常:)我測試，因爲它更安全，例如，如果底層連接消失。 – jgerman

我知道這篇文章已經過時了，但是因爲我今天遇到了這個問題，所以我想我可以節省一些時間。你得到這個錯誤的原因是，您使用的是預Java 6中（和預JDBC-4）Tomcat的版本，其中

java.sql.Statement.isClosed()

是接口的不部分：

http://docs.oracle.com/javase/1.5.0/docs/api/java/sql/Statement.html

但在Java 6，它是：

http://docs.oracle.com/javase/6/docs/api/java/sql/Statement.html#isClosed%28%29

見isClosed）的方法，在這裏可見性（

http://www.jarvana.com/jarvana/view/org/apache/tomcat/dbcp/6.0.20/dbcp-6.0.20.jar!/org/apache/tomcat/dbcp/dbcp/DelegatingStatement.class?classDetails=ok

與這裏：當前DelegatingStatement的

http://www.jarvana.com/jarvana/view/org/apache/tomcat/tomcat-dbcp/7.0.23/tomcat-dbcp-7.0.23.jar!/org/apache/tomcat/dbcp/dbcp/DelegatingStatement.class?classDetails=ok

上isClose的評論（）說：

/* 
* Note was protected prior to JDBC 4 
* TODO Consider adding build flags to make this protected unless we are 
*  using JDBC 4. 
*/ 
public boolean isClosed() throws SQLException { 
    return _closed; 
}

來源

2013-01-23 10:04:33

statement.isClose（）拋出IllegalAccess異常，因爲該語句是關閉的？

回答

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