java返回存储过程异常信息

import java.sql.CallableStatement;
import java.sql.SQLException;
import java.sql.Types;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.springframework.orm.hibernate3.
	HibernateTransactionManager;

public class ScreenMethodSessionImp extends DefaultBaseManager 
	implements ScreenMethodSession{
	/**50*/
	public static Integer PAGE_NUMBER = 50;
	//预到货预警-初始化数据-fdj-001-4
	public void screenAsnPre(){
		HibernateTransactionManager t = (HibernateTransactionManager) 
				applicationContext.getBean("transactionManager");
		Session session = t.getSessionFactory().getCurrentSession();
		String produce = "call insert_screen_asn_pre(?,?,?)";
		CallableStatement call = null;
		String mes = "success";
		try {
			call = session.connection().prepareCall(produce);
			call.setInt(1, PAGE_NUMBER);
			call.registerOutParameter(2, Types.INTEGER);
			call.registerOutParameter(3, Types.VARCHAR);
			call.execute();
			if(call.getInt(2)!=0){
				mes = call.getString(3);
				mes = MyUtils.font(mes);
			}
		} catch (HibernateException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}finally{
			if(call!=null){
				try {
					call.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		}
		LocalizedMessage.addLocalizedMessage(mes);
	}
}

create or replace procedure insert_screen_asn_pre
(PAGE_NUMBER IN int,ISERROR OUT int,errorMes OUT varchar2)
as
type cursors is ref cursor;
curs cursors; 
V_SUP_NAME SCREEN_ASN_PRE.Sup_Name%type;
V_ASN_CODE SCREEN_ASN_PRE.Asn_Code%type;
V_ARRIVAL_PRE SCREEN_ASN_PRE.Arrival_Pre%type;
nums int:=0;
begin
  open curs for select sup.name,a.code,a.estimate_date from wms_asn a
            left join wms_organization sup on sup.id = a.supplier_id
             where a.status in ('OPEN','ACTIVE') and a.estimate_date is not null
             and not exists(select 1 from SCREEN_ASN_PRE sc where sc.asn_code = a.code)
             ;
   loop
     fetch curs into V_SUP_NAME,V_ASN_CODE,V_ARRIVAL_PRE;
     exit when curs%notfound;
     insert into SCREEN_ASN_PRE(TYPE,Sup_Name,ASN_CODE,ARRIVAL_PRE) 
	 values('预到货预警',V_SUP_NAME,V_ASN_CODE,V_ARRIVAL_PRE);
     nums:= nums+1;
     --dbms_output.put_line('loop:'||nums);
     if nums >= PAGE_NUMBER
       then
         commit;
         nums:=0;
     end if;
   end loop;
   --dbms_output.put_line('end loop:'||nums);
   if nums >0 
     then
       commit;
       nums:=0;
   end if;
   ISERROR:=0;
   --dbms_output.put_line('end if:'||nums);
   exception
     when others
       then
         ISERROR:=1;
         errorMes:=sqlerrm;
         dbms_output.enable(buffer_size => null);
         dbms_output.put_line(dbms_utility.format_error_backtrace);
         --dbms_output.put_line('sqlcode:'||sqlcode);
         dbms_output.put_line('sqlerrm:'||sqlerrm);
       rollback;
   close curs;
end;