基于lucene的案例开发:查询语句创建PackQuery
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在之前的《基于lucene的案例开发:Query查询》这篇博客中对实际开发过程中比较常见的Query做了简单的介绍,这里就介绍下具体的代码实现。查看最新代码点击这里或访问 http://www.llwjy.com/source/com.lulei.lucene.query.PackQuery.html
- /**
- *@Description: 创建查询Query
- */
- package com.lulei.lucene.query;
- import java.io.IOException;
- import java.io.StringReader;
- import java.util.ArrayList;
- import org.apache.lucene.analysis.Analyzer;
- import org.apache.lucene.analysis.TokenStream;
- import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
- import org.apache.lucene.index.Term;
- import org.apache.lucene.queryparser.classic.MultiFieldQueryParser;
- import org.apache.lucene.queryparser.classic.ParseException;
- import org.apache.lucene.queryparser.classic.QueryParser;
- import org.apache.lucene.search.BooleanClause.Occur;
- import org.apache.lucene.search.BooleanQuery;
- import org.apache.lucene.search.NumericRangeQuery;
- import org.apache.lucene.search.PhraseQuery;
- import org.apache.lucene.search.PrefixQuery;
- import org.apache.lucene.search.Query;
- import org.apache.lucene.search.TermQuery;
- import org.apache.lucene.search.TermRangeQuery;
- import org.apache.lucene.search.WildcardQuery;
- import org.apache.lucene.util.Version;
- import com.lulei.lucene.index.manager.IndexManager;
- public class PackQuery {
- //分词器
- private Analyzer analyzer;
- //使用索引中的分词器
- public PackQuery(String indexName) {
- analyzer = IndexManager.getIndexManager(indexName).getAnalyzer();
- }
- //使用自定义分词器
- public PackQuery(Analyzer analyzer) {
- this.analyzer = analyzer;
- }
- /**
- * @param key
- * @param fields
- * @return Query
- * @throws ParseException
- * @Author: lulei
- * @Description: 查询字符串匹配多个查询域
- */
- public Query getMultiFieldQuery(String key, String[] fields) throws ParseException{
- MultiFieldQueryParser parse = new MultiFieldQueryParser(Version.LUCENE_43, fields, analyzer);
- Query query = null;
- query = parse.parse(key);
- return query;
- }
- /**
- * @param key
- * @param field
- * @return Query
- * @throws ParseException
- * @Author: lulei
- * @Description: 查询字符串匹配单个查询域
- */
- public Query getOneFieldQuery(String key, String field) throws ParseException{
- if (key == null || key.length() < 1){
- return null;
- }
- QueryParser parse = new QueryParser(Version.LUCENE_43, field, analyzer);
- Query query = null;
- query = parse.parse(key);
- return query;
- }
- /**
- * @param key
- * @param fields
- * @param occur
- * @return Query
- * @throws IOException
- * @Author: lulei
- * @Description: 查询字符串、多个查询域以及查询域在查询语句中的关系
- */
- public Query getBooleanQuery(String key, String[] fields, Occur[] occur) throws IOException{
- if (fields.length != occur.length){
- System.out.println("fields.length isn't equals occur.length, please check params!");
- return null;
- }
- BooleanQuery query = new BooleanQuery();
- TokenStream tokenStream = analyzer.tokenStream("", new StringReader(key));
- ArrayList<String> analyzerKeys = new ArrayList<String>();
- while(tokenStream.incrementToken()){
- CharTermAttribute term = tokenStream.getAttribute(CharTermAttribute.class);
- analyzerKeys.add(term.toString());
- }
- for(int i = 0; i < fields.length; i++){
- BooleanQuery queryField = new BooleanQuery();
- for(String analyzerKey : analyzerKeys){
- TermQuery termQuery = new TermQuery(new Term(fields[i], analyzerKey));
- queryField.add(termQuery, Occur.SHOULD);
- }
- query.add(queryField, occur[i]);
- }
- return query;
- }
- /**
- * @param querys
- * @param occur
- * @return Query
- * @Author: lulei
- * @Description: 组合多个查询,之间的关系由occur确定
- */
- public Query getBooleanQuery(ArrayList<Query> querys, ArrayList<Occur> occurs){
- if (querys.size() != occurs.size()){
- System.out.println("querys.size() isn't equals occurs.size(), please check params!");
- return null;
- }
- BooleanQuery query = new BooleanQuery();
- for (int i = 0; i < querys.size(); i++){
- query.add(querys.get(i), occurs.get(i));
- }
- return query;
- }
- /**
- * @param fieldName
- * @param value
- * @return
- * @Author: lulei
- * @Description: StringField属性的搜索
- */
- public Query getStringFieldQuery(String value, String fieldName){
- Query query = null;
- query = new TermQuery(new Term(fieldName, value));
- return query;
- }
- /**
- * @param fields
- * @param values
- * @return
- * @Author: lulei
- * @Description: 多个StringField属性的搜索
- */
- public Query getStringFieldQuery(String[] values, String[] fields, Occur occur){
- if (fields == null || values == null || fields.length != values.length){
- return null;
- }
- ArrayList<Query> querys = new ArrayList<Query>();
- ArrayList<Occur> occurs = new ArrayList<Occur>();
- for (int i = 0; i < fields.length; i++){
- querys.add(getStringFieldQuery(values[i], fields[i]));
- occurs.add(occur);
- }
- return getBooleanQuery(querys, occurs);
- }
- /**
- * @param key
- * @param field
- * @param lucene43
- * @return
- * @throws ParseException
- * @Author: lulei
- * @Description: 查询字符串和单个查询域 QueryParser是否使用4.3
- */
- public Query getOneFieldQuery(String key, String field, boolean lucene43) throws ParseException{
- if (key == null || key.length() < 1){
- return null;
- }
- if (lucene43){
- return getOneFieldQuery(key, field);
- }
- @SuppressWarnings("deprecation")
- QueryParser parse = new QueryParser(Version.LUCENE_30, field, analyzer);
- Query query = null;
- query = parse.parse(key);
- return query;
- }
- /**
- * @param key
- * @param field
- * @Author: lulei
- * @Description: key开头的查询字符串,和单个域匹配
- */
- public Query getStartQuery(String key, String field) {
- if (key == null || key.length() < 1){
- return null;
- }
- Query query = new PrefixQuery(new Term(field, key));
- return query;
- }
- /**
- * @param key
- * @param fields
- * @param occur
- * @Author: lulei
- * @Description: key开头的查询字符串,和多个域匹配,每个域之间的关系由occur确定
- */
- public Query getStartQuery(String key, String []fields, Occur occur){
- if (key == null || key.length() < 1){
- return null;
- }
- ArrayList<Query> querys = new ArrayList<Query>();
- ArrayList<Occur> occurs = new ArrayList<Occur>();
- for (String field : fields) {
- querys.add(getStartQuery(key, field));
- occurs.add(occur);
- }
- return getBooleanQuery(querys, occurs);
- }
- /**
- * @param key
- * @param fields
- * @Author: lulei
- * @Description: key开头的查询字符串,和多个域匹配,每个域之间的关系Occur.SHOULD
- */
- public Query getStartQuery(String key, String []fields) {
- return getStartQuery(key, fields, Occur.SHOULD);
- }
- /**
- * @param key
- * @param field
- * @param slop
- * @return
- * @Author:lulei
- * @Description: 自定每个词元之间的最大距离
- */
- public Query getPhraseQuery(String key, String field, int slop) {
- if (key == null || key.length() < 1){
- return null;
- }
- StringReader reader = new StringReader(key);
- PhraseQuery query = new PhraseQuery();
- query.setSlop(slop);
- try {
- TokenStream tokenStream = this.analyzer.tokenStream(field, reader);
- tokenStream.reset();
- CharTermAttribute term = tokenStream.getAttribute(CharTermAttribute.class);
- while(tokenStream.incrementToken()){
- query.add(new Term(field, term.toString()));
- }
- reader.close();
- } catch (IOException e) {
- e.printStackTrace();
- return null;
- }
- return query;
- }
- /**
- * @param key
- * @param fields
- * @param slop
- * @param occur
- * @return
- * @Author:lulei
- * @Description: 自定每个词元之间的最大距离,查询多个域,每个域之间的关系由occur确定
- */
- public Query getPhraseQuery(String key, String[] fields, int slop, Occur occur) {
- if (key == null || key.length() < 1){
- return null;
- }
- ArrayList<Query> querys = new ArrayList<Query>();
- ArrayList<Occur> occurs = new ArrayList<Occur>();
- for (String field : fields) {
- querys.add(getPhraseQuery(key, field, slop));
- occurs.add(occur);
- }
- return getBooleanQuery(querys, occurs);
- }
- /**
- * @param key
- * @param fields
- * @param slop
- * @return
- * @Author:lulei
- * @Description: 自定每个词元之间的最大距离,查询多个域,每个域之间的关系是Occur.SHOULD
- */
- public Query getPhraseQuery(String key, String[] fields, int slop) {
- return getPhraseQuery(key, fields, slop, Occur.SHOULD);
- }
- /**
- * @param key
- * @param field
- * @return
- * @Author:lulei
- * @Description: 通配符检索 eg:getWildcardQuery("a*thor", "field")
- */
- public Query getWildcardQuery(String key, String field) {
- if (key == null || key.length() < 1){
- return null;
- }
- return new WildcardQuery(new Term(field, key));
- }
- /**
- * @param key
- * @param fields
- * @param occur
- * @return
- * @Author:lulei
- * @Description: 通配符检索,域之间的关系为occur
- */
- public Query getWildcardQuery(String key, String[] fields, Occur occur) {
- if (key == null || key.length() < 1){
- return null;
- }
- ArrayList<Query> querys = new ArrayList<Query>();
- ArrayList<Occur> occurs = new ArrayList<Occur>();
- for (String field : fields) {
- querys.add(getWildcardQuery(key, field));
- occurs.add(occur);
- }
- return getBooleanQuery(querys, occurs);
- }
- /**
- * @param key
- * @param fields
- * @return
- * @Author:lulei
- * @Description: 通配符检索,域之间的关系为Occur.SHOULD
- */
- public Query getWildcardQuery(String key, String[] fields) {
- return getWildcardQuery(key, fields, Occur.SHOULD);
- }
- /**
- * @param keyStart
- * @param keyEnd
- * @param field
- * @param includeStart
- * @param includeEnd
- * @return
- * @Author:lulei
- * @Description: 范围搜索
- */
- public Query getRangeQuery (String keyStart, String keyEnd, String field, boolean includeStart, boolean includeEnd) {
- return TermRangeQuery.newStringRange(field, keyStart, keyEnd, includeStart, includeEnd);
- }
- /**
- * @param min
- * @param max
- * @param field
- * @param includeMin
- * @param includeMax
- * @return
- * @Author:lulei
- * @Description: 范围搜索
- */
- public Query getRangeQuery (int min, int max, String field, boolean includeMin, boolean includeMax) {
- return NumericRangeQuery.newIntRange(field, min, max, includeMin, includeMax);
- }
- /**
- * @param min
- * @param max
- * @param field
- * @param includeMin
- * @param includeMax
- * @return
- * @Author:lulei
- * @Description: 范围搜索
- */
- public Query getRangeQuery (float min, float max, String field, boolean includeMin, boolean includeMax) {
- return NumericRangeQuery.newFloatRange(field, min, max, includeMin, includeMax);
- }
- /**
- * @param min
- * @param max
- * @param field
- * @param includeMin
- * @param includeMax
- * @return
- * @Author:lulei
- * @Description: 范围搜索
- */
- public Query getRangeQuery (double min, double max, String field, boolean includeMin, boolean includeMax) {
- return NumericRangeQuery.newDoubleRange(field, min, max, includeMin, includeMax);
- }
- public static void main(String[] args) throws IOException {
- }
- }
PackQuery类的构造方法,可以手动指定分词器也可以使用索引的分词器。个人建议,在项目中使用索引中的分词器,这样就不会因为分词器的不同造成不知名的错误。
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ps:最近发现其他网站可能会对博客转载,上面并没有源链接,如想查看更多关于 基于lucene的案例开发 请点击这里。或访问网址http://blog.csdn.net/xiaojimanman/article/category/2841877