Getting null pointer exception from dao

Question

I am getting NullPointerException while calling a method: Xgenexport.java

Map agent_Details = commonLookupDAO.getAgentDetails(dQuoteDetails.getAgentId());

And the method in: Commonlookup dao:

public Map getAgentDetails(String agentId);

Commonlookupdaoimpl

public Map getAgentDetails(String agentId) {
    /*some code*/
    return resultMap;
}

Im getting NullPointerException while calling this method don't know the exact reason.

So what exactly is at the line `XGenExportmotorcycle.java:281`? Is it the code which you posted first? If so, post a little more code, like where the Dao is injected. — dunni, Oct 01 '16 at 07:44
@mike - No. Your case is the same. That Q & A gives a >>general<< explanation of what an NPE is and a >>general<< approach to solving the problem. You apply it to your particular problem. — Stephen C, Oct 01 '16 at 07:59
And for what it is worth, you have not shown us any evidence that would help us help you anyway. You need to 1) show us the stack trace, 2) show us the relevant code, 3) identify clearly the line of code at which the exception was thrown. — Stephen C, Oct 01 '16 at 08:00
No i got little bit confused when im using a return type as string i can acces this method — mike, Oct 01 '16 at 08:03
if(StringUtils.isNotBlank(dQuoteDetails.getAgentId())){ Map agent_details = commonLookupDAO.getAgentDetails(dQuoteDetails.getAgentId()); } — mike, Oct 01 '16 at 09:30
public Map getAgentDetails(String agentId) { LOGGER.info("agent details starts :::::::::"); Session session = getSessionFactory().getCurrentSession(); String oa_code = ""; String ag_code = ""; Map resultMap = new HashedMap(); try{ SQLQuery query = session.createSQLQuery("Select OA_CODE,AG_CODE from AGENT_MASTER where AGENT_ID= :agentId"); query.setParameter("agentId", agentId); List query_list = query.list(); — mike, Oct 01 '16 at 09:32
when i changed the return type to String im not getting any exception.it works fine.. — mike, Oct 01 '16 at 09:36
if any body can't understand my code plz revert me so that i can do the possible note.. — mike, Oct 01 '16 at 09:37

score 0 · Answer 1 · answered Oct 01 '16 at 08:01

0

how you are creating obect commonLookupDAO

using Spring you may need to use Autowire it, if you are creating Single object of DAO class

answered Oct 01 '16 at 08:01

Shantaram Tupe

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Show me your controller – Shantaram Tupe Oct 01 '16 at 08:02
I used autowired only – mike Oct 01 '16 at 09:06

Getting null pointer exception from dao

1 Answers1