Lucene various query methods

Various inquiries
Method One: Use Queryparser with query syntax. (Word breaker will be used)

Multifieldqueryparser
Querying strings------------------------> Query objects

For example:
Shanghai and Weather
Shanghai OR Weather
Shanghai News and Site:news.163.com
...

way two:
Create an instance of query directly (subclass) without using the word breaker
new termquery (..);
New Booleanquery (..);

package cn.itcast.i_query;import java.util.arraylist;import java.util.list;import  org.apache.lucene.document.document;import org.apache.lucene.index.term;import  org.apache.lucene.search.booleanquery;import org.apache.lucene.search.fuzzyquery;import  org.apache.lucene.search.indexsearcher;import org.apache.lucene.search.matchalldocsquery;import  org.apache.lucene.search.numericrangequery;import org.apache.lucene.search.query;import  org.apache.lucene.search.termquery;import org.apache.lucene.search.topdocs;import  org.apache.lucene.search.wildcardquery;import org.apache.lucene.search.booleanclause.occur;import  Org.junit.test;import cn.itcast._domain. Article;import cn.itcast._util. Articledocumentutils;import cn.itcast._util. luceneutils;public class testapp {    //  keyword Query      @Test     public void testtermquery () &nbsp {        //  the corresponding query string is:title:lucene         termquery query = new termquery (New term ("title",  "Lucene"));         searchandshowresult (query);    }     //  Wildcard Query     // ?  represents an arbitrary character     //  *  represents 0 or more arbitrary characters      @Test     public void testwildcardquery ( )  {        //  the corresponding query string is:title:lu*n?         // wildcardquery query = new wildcardquery (New Term (" Title ", " Lu*n ")); The query string for         //  is: content: Mutual Network          wildcardquery query = new wildcardquery (New Term ("content", &NBSP; " Network ");         searchandshowresult (query);     }     //  Search all      @Test     public void  testmatchalldocsquery ()  {        //  the corresponding query string is: *:*         MatchAllDocsQuery query = new  Matchalldocsquery ();         searchandshowresult (query);     }    //  fuzzy query      @Test     public  void testfuzzyquery ()  {        //  the corresponding query string is: Title :lucenx~0.9        //  The second parameter is the minimum similarity, indicating how much of the correct one is displayed, such as 0.9 for 90% The correct characters will be displayed.         fuzzyquery query = new fuzzyquery (New  term ("title",  "Lucenx"), 0.8f);         searchandshowresult (query);     }    //  Range Search      @Test     public  Void testnumericrangequery ()  {        //  the corresponding query string is: id:[ 5 to 15]        // numericrangequery query =  numericrangequery.newintrange ("id",  5, 15, true, true);         //  the corresponding query string is:id:{5 to 15}         // numericrangequery query = numericrangequery.newintrange ("id",  5, 15,  false, false);        //  The corresponding query string is:id:[5 to  15}        numericrangequery query =  Numericrangequery.newintrange ("id",  5,  15, true, false);         searchandshowresult (query);     }    //  Boolean queries      @Test      Public void testbooleanquery ()  {        booleanquery  booleanquery = new booleanquery ();         //  booleanquery.add (Query, occur.must); //  must meet          // booleanquery.add (query, occur.should); //  multiple should with or relationship          // booleanquery.add (Query, occur.must_not); //  non-         query query1 = new termquery (New Term ("title",   "Lucene");        query query2 =  Numericrangequery.newintrange ("id", &NBSP;5,&Nbsp;15, false, true);        // //  The corresponding query string is: + title:lucene +id:{5 to 15]        // //  The corresponding query string is (uppercase and):title:lucene and id:{5 to 15]         // booleanquery.add (query1, occur.must);         //  booleanquery.add (Query2, occur.must);        //  The corresponding query string is:title:lucene id:{5 to 15]        //  The corresponding query string is: title:lucene or id:{5 to 15]        //  booleanquery.add (query1, occur.should);        //  Booleanquery.add (query2, occur.should);        //  the corresponding query string is: +title:lucene -id:{5 to 15]        //  the corresponding query string is:title:lucene  (NOT id:{5 TO  15] )         booleanquery.add (query1, occur.must);         booleanquery.add (Query2, occur.must_not);         searchandshowresult (booleanquery);    }     /**     *  tool methods for testing search      *       *  @param  query     */    private  void searchandshowresult (query query)  {         try {            // //  Preparing query conditions              // String queryString =  "Content:lucene";            // //  1. Convert query string to query object (queries from title and content)             //  queryparser queryparser = new multifieldqueryparser (Version.LUCENE_30, new  String[] {  "title",  "Content"  }, luceneutils.getanalyzer ());             // query query = queryparser.parse ( queryString); &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN ("--- >  //  the corresponding query string is: " + query +  \ n");             // 2, execute queries, get intermediate results              indexsearcher indexsearcher = new indexsearcher ( Luceneutils.getdirectory ()); //  specifies the index library used     &nbsP;       topdocs topdocs = indexsearcher.search (query,  ; //  back up to top n results             //  3, processing results             list<article> list  = new ArrayList<Article> ();             for  (int i = 0; i < topdocs.scoredocs.length; i++)  {                //   Get document data by number                  int docid = topdocs.scoredocs[i].doc; // document's internal number                  Document doc =  Indexsearcher.doc (docId);                 //  Convert Document to article                 article article = articledocumentutils.documenttoarticle (DOC);                 list.add (article);             }             indexsearcher.close ();             //  Display Results             system.out.println (" Total number of results: " + list.size ()");             for   (article a : list)  {                 system.Out.println ("------------------------------");                 system.out.println ("id = "  + a.getid ());                 system.out.println ("title  =  " + a.gettitle ());                 system.out.println ("content = "  + a.getcontent ());             }         } catch  (exception e)  {             throw new runtimeexception (e);        }     }}

Lucene various query methods