问题
I'm very new to Solr and I'm evaluating it. My task is to look for words within a corpus of books and return them within a small context. So far, I'm storing the books in a database split by paragraphs (slicing the books by line breaks), I do a fulltext search and return the row.
In Solr, would I have to do the same, or can I add the whole book (in .txt format) and, whenever a match is found, return something like the match plus 100 words before and 100 words after or something like that? Thanks
回答1:
Highlighting will do your bidding. http://wiki.apache.org/solr/HighlightingParameters
Here are relevant options for you:
hl.snippets
The maximum number of highlighted snippets to generate per field.....
hl.fragsize
The size, in characters, of the snippets (aka fragments) created by the highlighter.....
The default value is "100".
hl.mergeContiguous
Collapse contiguous fragments into a single fragment....
For what you describe, set it to return 5 (or whatever a human can sanely handle) snippets from text field with hl.fl; the length of each snippet 400 characters (my approximation of 100 words) around the word/phrase.
See also hl.regex.slop for building snippets around phrases and hl.simple.pre/hl.simple.post for markup.
来源：https://stackoverflow.com/questions/9156614/searching-books-in-apache-solr