code: private void freeMicroConnection(MicroPooledConnection microConn) { 
  
  
  		Connection tempConn=null;
  		try {
  			tempConn = microConn.getConnection();
  		} catch (SQLException e) {
  			// TODO Auto-generated catch block
  			e.printStackTrace();
  		}
  		if(tempConn!=null){
  			int totalSize=getConnCount();
  			if(totalSize<=getMinSize()){
  				pool.add(tempConn); 
  			}
  		}
      }
docs: 连接归池
  
  @param conn