Lucene-2.0学习文档（４）
接http://www.iteye.com/topic/39876下面是搜索的例子:
public void SearchSort1() throws IOException, ParseException{ IndexSearcher indexSearcher = new IndexSearcher("C:\\indexStore"); QueryParser queryParser = new QueryParser("sort",new StandardAnalyzer()); Query query = queryParser.parse("4"); Hits hits = indexSearcher.search(query); System.out.println("有"+hits.length()+"个结果"); Document doc = hits.doc(0); System.out.println(doc.get("sort"));}public void SearchSort2() throws IOException, ParseException{ IndexSearcher indexSearcher = new IndexSearcher("C:\\indexStore"); Query query = new RangeQuery(new Term("sort","1"),new Term("sort","9"),true);//这个地方前面没有提到，它是用于范围的Query可以看一下帮助文档. Hits hits = indexSearcher.search(query,new Sort(new SortField("sort",new MySortComparatorSource()))); System.out.println("有"+hits.length()+"个结果"); for(int i=0;i { Document doc = hits.doc(i); System.out.println(doc.get("sort")); }}public class MyScoreDocComparator implements ScoreDocComparator{ private Integer[]sort; public MyScoreDocComparator(String s,IndexReader reader, String fieldname) throws IOException { sort = new Integer; for(int i = 0;i { Document doc =reader.document(i); sort=new Integer(doc.get("sort")); } } public int compare(ScoreDoc i, ScoreDoc j) { if(sort>sort) return 1; if(sort<sort) return -1; return 0; } public int sortType() { return SortField.INT; } public Comparable sortValue(ScoreDoc i) { // TODO 自动生成方法存根 return new Integer(sort); }}public class MySortComparatorSource implements SortComparatorSource{ private static final long serialVersionUID = -9189690812107968361L; public ScoreDocComparator newComparator(IndexReader reader, String fieldname) throws IOException { if(fieldname.equals("sort")) return new MyScoreDocComparator("sort",reader,fieldname); return null; }}
SearchSort1()输出的结果没有排序,SearchSort2()就排序了。
2.多域搜索MultiFieldQueryParser
如果想输入关键字而不想关心是在哪个Field里的就可以用MultiFieldQueryParser了
用它的构造函数即可后面的和一个Field一样。
MultiFieldQueryParser. parse(String[] queries, String[] fields, BooleanClause.Occur[] flags, Analyzer analyzer) ~~~~~~~~~~~~~~~~~
第三个参数比较特殊这里也是与以前lucene1.4.3不一样的地方
看一个例子就知道了
String[] fields = {"filename", "contents", "description"};
BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD,
BooleanClause.Occur.MUST,//在这个Field里必须出现的
BooleanClause.Occur.MUST_NOT};//在这个Field里不能出现
MultiFieldQueryParser.parse("query", fields, flags, analyzer);
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