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after entering username and password i am getting this exception..please tell me the solution

 
syed mahboob
Greenhorn
Posts: 15
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this is my login.jsp page below






java.sql.SQLException: Invalid column name
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:208)
at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3296)
at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:1914)
at oracle.jdbc.driver.OracleResultSet.getString(OracleResultSet.java:1515)
at com.lara.login.LoginDAO.authenticateUser(LoginDAO.java:34)
at com.lara.login.LoginAction.process(LoginAction.java:23)
at com.lara.servlets.controller.ControllerServlet.doPerform(ControllerServlet.java:112)
at com.lara.servlets.controller.ControllerServlet.doPost(ControllerServlet.java:86)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
 
Seetharaman Venkatasamy
Ranch Hand
Posts: 5575
Eclipse IDE Java Windows XP
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quoted from your error stack trace.

at com.lara.login.LoginDAO.authenticateUser(LoginDAO.java:34)

 
Seetharaman Venkatasamy
Ranch Hand
Posts: 5575
Eclipse IDE Java Windows XP
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Please, CarefullyChooseOneForum :)

Moving to an appropriate forum now.
 
Paul Clapham
Sheriff
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Eclipse IDE Firefox Browser MySQL Database
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There's something wrong with your SQL statement (the error message says exactly what is wrong if you care to read it). However neither we nor you can see the SQL which is being executed.

But anyway, constructing SQL statements via string concatenation like that is a bad practice. You should use a PreparedStatement instead. Check the tutorials to find out how.
 
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