SQLNonTransientConnectionException：在与Derby数据库交互时，在我的应用程序中没有当前连接

 public synchronized Connection createConnection() throws Exception {

        Connection rescon = null;

        try {
            if (this.dbuser == null) {
                rescon = DriverManager.getConnection(this.URI + \";create=true\");
                } else {
                rescon = DriverManager.getConnection(this.URI + \";create=true\",
                        this.dbuser, this.dbpass);
            }
            // new connection in connection pool created
        } catch (SQLException e) {
            final String stackNum = Utility.exceptionHandler(e);
            throw new Exception(\"Exception get during Connection - \" + e.getMessage());
        }
        return rescon;
    }

private Connection objConnection = null;
objConnectionpool = new Connection(\"jdbc:derby:\" + Folder.getAbsolutePath() +        \"/myapplication\" + sFileName, null, null, \"org.apache.derby.jdbc.EmbeddedDriver\");
objConnection =  objConnectionpool.createNewConnection();

sQuery = \"select value,reason from \" + TableNm + \" where fileName =\'\" + FileName + \"\' AND type=\'\"+Type+\"\' AND status =\'remaining\'\"; 

objConnection.setAutoCommit(false);

ps = objConnection.prepareStatement(sQuery);
rs = ps.executeQuery();
objConnection.commit();
objConnection.setAutoCommit(true);

java.sql.SQLNonTransientConnectionException: No current connection.
    at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.Util.noCurrentConnection(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.checkIfClosed(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.setupContextStack(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
    at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
    at com.myapplication.c.aw.a(Unknown Source)
    at com.myapplication.c.aw.a(Unknown Source)
    at com.myapplication.main.avd.run(Unknown Source)
Caused by: java.sql.SQLException: No current connection.
    at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
    at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
    ... 11 more