SQLクエリを渡そうとしていますが、「java.sql.SQLException:ResultSetが閉じられた後に操作が許可されません」というメッセージが表示されます。私はstackoverflowで同じ例外に基づいて他の会話を行っているが、まだ私は問題を理解していない。ここで結果セット関数で 'ResultSetが閉じています'
はコードです:ここ
Class.forName("com.mysql.jdbc.Driver").newInstance();
String query="SELECT candidate,pan from hcl_candidates where jngstat='Joined'";
statement=conn.createStatement();
resultset=statement.executeQuery(query);
while(resultset.next()){
statement.executeUpdate("insert IGNORE into allinvoice (candidate,pan,invdate,client) select candidate,pan,CURDATE(),'HCL' from hcl_candidates where jngstat='Joined'");
}
}
catch (SQLException ex)
{
ex.printStackTrace();
out.println("Unable to connect to batabase.");
}
finally
{
try
{
if(statement!=null)
{
statement.close();
}
if(conn!=null){
conn.close();
}
if(resultset!=null){
resultset.close();
}
}
catch (SQLException e)
{
e.printStackTrace();
}
}
は完全なスタックトレースです:
java.sql.SQLException: Operation not allowed after ResultSet closed
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:896)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:885)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)
at com.mysql.jdbc.ResultSetImpl.checkClosed(ResultSetImpl.java:743)
at com.mysql.jdbc.ResultSetImpl.next(ResultSetImpl.java:6320)
at org.apache.jsp.hclimport_jsp._jspService(hclimport_jsp.java:92)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
あなたのプログラムはブロックされていません。 – EJP