Lucene-2.0学习文档（４）
接http://www.iteye.com/topic/39876
下面是搜索的例子:
[code]
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[reader.maxDoc()];
??????? for(int i = 0;i
??????? {
??????????? Document doc =reader.document(i);
??????????? sort[i]=new Integer(doc.get("sort"));
??????? }
??? }
??? public int compare(ScoreDoc i, ScoreDoc j)
??? {
??????? if(sort[i.doc]>sort[j.doc])
??????????? return 1;
??????? if(sort[i.doc]<sort[j.doc])
??????????? 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[i.doc]);
??? }
}
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;
??? }
}[/code]
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);
?（未完） 1 楼 galaxystar 2006-12-22 java写搜索引擎，好多抄袭现有的设计，太委屈它了！
还是直接C++写的比较实际！ 2 楼 ITeye管理员 2006-12-26 根据仲裁委员会的意见，此贴取消良好，恢复楼主likunkun被加30分。

期待likunkun更多更好的帖子。

仲裁详情请见：

http://www.iteye.com/topic/40320
3 楼 夺天策 2007-04-29 新手提个问题！！
怎么实现搜索返回页面的摘要，像google，baidu那样，是不是需要把文档正文都保存到index中。。具体怎么实现？谢谢 4 楼 im9527 2007-08-29 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"));
}
}

这个方法怎么不用分析器的?new StandardAnalyzer();