我的应用程序使用 Oracle UCP 监听几个表。在生产环境中应用程序工作正常，但在测试环境中，应用程序从池中用完了连接。我也在每个查询中关闭并返回使用的连接。请参考连接关闭方法。
public static synchronized void closeConnection(Connection con) throws Exception {
String print;
try {
if (con != null && !con.isClosed()) {
con.close();
con =null;
Config.DB_POOL_COUNT_AVAILABLE = pds.getAvailableConnectionsCount();
Config.DB_POOL_COUNT_BUSSY = pds.getBorrowedConnectionsCount();
Config.DB_POOL_COUNT_OPENED = Config.DB_POOL_COUNT_AVAILABLE + Config.DB_POOL_COUNT_BUSSY;
} else {
Config.DB_POOL_COUNT_AVAILABLE = pds.getAvailableConnectionsCount();
Config.DB_POOL_COUNT_BUSSY = pds.getBorrowedConnectionsCount();
Config.DB_POOL_COUNT_OPENED = Config.DB_POOL_COUNT_AVAILABLE + Config.DB_POOL_COUNT_BUSSY;
}
} catch (Exception e) {
Logger.errorLog(e);
} finally {
Config.DB_POOL_COUNT_AVAILABLE = pds.getAvailableConnectionsCount();
Config.DB_POOL_COUNT_BUSSY = pds.getBorrowedConnectionsCount();
Config.DB_POOL_COUNT_OPENED = Config.DB_POOL_COUNT_AVAILABLE + Config.DB_POOL_COUNT_BUSSY;
if(con != null && !con.isClosed()){
con.close();
con=null;
}
}
}