weblogic Connection has already been closed解決方案

com.ibatis.common.jdbc.exception.NestedSQLException:   

--- The error occurred while applying a parameter map.  
--- Check the CheckErrorDetail.getDeviceErrorDetailCount-InlineParameterMap.  
--- Check the results (failed to retrieve results).  
--- Cause: java.sql.SQLException: Connection has already been closed.
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryWithCallback(GeneralStatement.java:185)
at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForObject(GeneralStatement.java:104)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:568)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:543)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:83)

at com.comtop.product.component.simpleorm.dao.SimpleORMDAO.getObject(SimpleORMDAO.java:145)