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From Srikanth Balusni <balu...@cs.odu.edu>
Subject Re: search exception in servlet!Please help me
Date Wed, 04 Aug 2004 06:20:55 GMT
By observing the implementation details of the Hits object lucene, I feel
that  Hits.doc(n) intends 'n' to be the index of the results. So, my
feeling is that progam which Li wrote should work ideally.
Erik, Correct me if I am wrong.
Li, Can you post entire stack trace?

Thanks,
sri


> hi,Erik
>
> But before I put my code to the servlet I can get the correct document
> by following:
> Hits hits=searcher.search(query);
> for (int i=0;i<hits.length(),i++){
> Document doc= hits.doc(i);
> ....
> }
> Could you tell me how you get the document?
>
> thanks,
> Li
>
>> Where did you get 'i'?   Keep in mind that using Hits.doc(n) intends
>> 'n' to be a document *id*, not the iteration through the Hits
>> collection.  This is a very common mistake, and I'm guessing one
>> you've made here.
>>
>> 	Erik
>>
>>
>> On Aug 3, 2004, at 7:49 PM, xuemei li wrote:
>>
>>> Thank you for your reply.
>>> when I want to get the document from hits.It throws
>>> nullpointerexception.But the hits.length() value is not 0.
>>>
>>> thanks,
>>> Xuemei Li
>>>> What is the exception? Is hits null or the index (i) out of bounds?
>>>>
>>>> sv
>>>>
>>>> On Tue, 3 Aug 2004, xuemei li wrote:
>>>>
>>>>> hi,all,
>>>>>
>>>>> I am using lucene to search.When I use console to run my code it
>>>>> works
>>>>> fine.But after I put my code to a servlet.It will throw
>>>>> exception.Here
>>>>> is my exception code:
>>>>>          Document doc= hits.doc(i);-->exception
>>>>> But I can use the following code to get the hits.length() value.
>>>>>     out.println("<center><p>There are  "+hits.length()+"
 matches
>>>>> for
>>>>> the
>>>>> word you have entered !</p></center>");
>>>>>
>>>>> What's the problem?Any reply will be appreciated.
>>>>>
>>>>> thanks,
>>>>> Xuemei Li
>>>>>
>>>>>
>>>>>
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>>>
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>
>
>
>
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