Solr Facet
1、在schema.xml中的内容如下：<?xml version="1.0" ?>
<schema name="my core" version="1.1">
<fieldtype name="string"class="solr.StrField" sortMissingLast="true" omitNorms="true"/>
<fieldType name="long" class="solr.TrieLongField" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="tdate" class="solr.TrieDateField" precisionStep="6" positionIncrementGap="0"/>
<fieldType name="int" class="solr.TrieIntField" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="float" class="solr.TrieFloatField" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="double" class="solr.TrieDoubleField" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="boolean" class="solr.BoolField" sortMissingLast="true"/>
<fieldtype name="binary" class="solr.BinaryField"/>
<fieldType name="text_cn" class="solr.TextField">
<analyzer type="index" class="org.wltea.analyzer.lucene.IKAnalyzer" />
<analyzer type="query" class="org.wltea.analyzer.lucene.IKAnalyzer" />
<analyzer>
<tokenizer class="solr.KeywordTokenizerFactory"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
<!-- general -->
<field name="id" type="long" indexed="true" stored="true" multiValued="false" required="true"/>
<field name="subject" type="text_cn" indexed="true" stored="true" />
<field name="content" type="text_cn" indexed="true" stored="true" />
<field name="regionId" type="int" indexed="true" stored="true" />
<field name="region" type="text_cn" indexed="true" stored="true" />
<field name="categoryId" type="int" indexed="true" stored="true" />
<field name="category" type="text_cn" indexed="true" stored="true" />
<field name="price" type="float" indexed="true" stored="true" />
<field name="_version_" type="long" indexed="true" stored="true"/>
<!-- field to use to determine and enforce document uniqueness. -->
<uniqueKey>id</uniqueKey>
<!-- field for the QueryParser to use when an explicit fieldname is absent -->
<defaultSearchField>subject</defaultSearchField>
<!-- SolrQueryParser configuration: defaultOperator="AND|OR" -->
<solrQueryParser defaultOperator="OR"/>
</schema>
2、Java bean:
package com.my.entity;
import org.apache.solr.client.solrj.beans.Field;
public class Item {
@Field
private long id;
@Field
private String subject;
@Field
private String content;
@Field
private int regionId;
@Field
private int categoryId;
@Field
private float price;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public int getRegionId() {
return regionId;
}
public void setRegionId(int regionId) {
this.regionId = regionId;
}
public int getCategoryId() {
return categoryId;
}
public void setCategoryId(int categoryId) {
this.categoryId = categoryId;
}
public float getPrice() {
return price;
}
public void setPrice(float price) {
this.price = price;
}
}
3、使用solrj测试例子：
package com.my.solr;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrQuery.ORDER;
import org.apache.solr.client.solrj.SolrQuery.SortClause;
import org.apache.solr.client.solrj.SolrServerException;
import org.apache.solr.client.solrj.impl.HttpSolrServer;
import org.apache.solr.client.solrj.impl.XMLResponseParser;
import org.apache.solr.client.solrj.response.FacetField;
import org.apache.solr.client.solrj.response.FacetField.Count;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.params.FacetParams;
import com.my.entity.Item;
public class TestSolr {
private static HashMap<Integer, String> mapRegion = new HashMap<Integer, String>();
private static HashMap<Integer, String> mapCategory = new HashMap<Integer, String>();
public static void main(String[] args) throws IOException,
SolrServerException {
// ------------------------------------------------------
// Set map
// ------------------------------------------------------
mapRegion.put(1, "罗湖区");
mapRegion.put(2, "南山区");
mapRegion.put(3, "龙岗区");
mapRegion.put(4, "福田区");
mapCategory.put(1, "单间");
mapCategory.put(2, "2房1厅");
mapCategory.put(3, "3房2厅");
mapCategory.put(4, "1房1厅");
String url = "http://localhost:8899/solr/mycore";
HttpSolrServer core = new HttpSolrServer(url);
core.setMaxRetries(1);
core.setConnectionTimeout(5000);
core.setParser(new XMLResponseParser()); // binary parser is used by
// default
core.setSoTimeout(1000); // socket read timeout
core.setDefaultMaxConnectionsPerHost(100);
core.setMaxTotalConnections(100);
core.setFollowRedirects(false); // defaults to false
core.setAllowCompression(true);
// ------------------------------------------------------
// remove all data
// ------------------------------------------------------
core.deleteByQuery("*:*");
List<Item> items = new ArrayList<Item>();
items.add(makeItem(items.size() + 1, "龙城公寓一房一厅", "豪华城城公寓1房1厅，拧包入住", 1, 1, 1200f));
items.add(makeItem(items.size() + 1, "兴新宿舍楼 1室0厅", " 中等装修 招女性合租", 1, 1, 1000f));
items.add(makeItem(items.size() + 1, "西丽新屋村新宿舍楼单间", " 无敌装修只招女性", 2, 1, 1000f));
items.add(makeItem(items.size() + 1, "大芬村信和爱琴居地铁口2房1厅", " 地铁口 + 出行便利=居家首选", 3, 2, 2000f));
items.add(makeItem(items.size() + 1, "龙岗富豪花园3房2厅出租", " 离地铁口只要5分钟，快来秒杀吧", 3, 3, 4500f));
items.add(makeItem(items.size() + 1, "海景房园3房2厅出租", "无敌海景，可以看到伦敦", 4, 3, 8500f));
items.add(makeItem(items.size() + 1, "天域花园1房1厅出租", "男女不限，入住免水电一月", 2, 4, 1500f));
items.add(makeItem(items.size() + 1, "神一样的漂亮，玉馨山庄3房2厅", "心动不如行动，拧包即可入住，来吧！", 1, 3, 9500f));
items.add(makeItem(items.size() + 1, "玉馨山庄2房1厅，情侣最爱", "宅男宅女快来吧只要2500，走过路过，别再错过", 1, 2, 2500f));
items.add(makeItem(items.size() + 1, "天域花园3房2厅出租", "都来看看，都来瞄瞄，3房只要7500.", 4, 3, 7500f));
items.add(makeItem(items.size() + 1, "深都花园出租3房2厅", "找爱干净的人氏，全新装修", 4, 3, 5200f));
core.addBeans(items);
// commit
core.commit();
// ------------------------------------------------------
// search
// ------------------------------------------------------
SolrQuery query = new SolrQuery();
query.setQuery("*:*");
query.setStart(0); // query的开始行数(分页使用)
query.setRows(100); // query的返回行数(分页使用)
query.setFacet(true); // 设置使用facet
query.setFacetMinCount(1); // 设置facet最少的统计数量
query.setFacetLimit(10); // facet结果的返回行数
query.addFacetField("categoryId", "regionId"); // facet的字段
query.setFacetSort(FacetParams.FACET_SORT_COUNT);
query.addSort(new SortClause("id", ORDER.asc)); // 排序
QueryResponse response = core.query(query);
List<Item> items_rep = response.getBeans(Item.class);
List<FacetField> facetFields = response.getFacetFields();
// 因为上面的start和rows均设置为0，所以这里不会有query结果输出
System.out.println("--------------------");
System.out.println("Search result:");
for (Item item : items_rep) {
System.out.println("id=" + item.getId() + "\tsubject=" + item.getSubject()
+ "\tregion=" + mapRegion.get(item.getRegionId())
+ "\tcategory=" + mapCategory.get(item.getCategoryId())
+ "\tprice=" + item.getPrice());
}
// 打印所有facet
for (FacetField ff : facetFields) {
System.out.println("--------------------");
System.out.println("name=" + ff.getName() + "\tcount=" + ff.getValueCount());
System.out.println("--------------------");
switch (ff.getName()) {
case "regionId":
printOut(mapRegion, ff.getValues());
break;
case "categoryId":
printOut(mapCategory, ff.getValues());
break;
}
}
}
@SuppressWarnings({ "rawtypes" })
private static void printOut(HashMap map, List<Count> counts) {
for (Count count : counts) {
System.out.println("name=" + map.get(Integer.parseInt(count.getName())) + "\tcount=" + count.getCount());
}
System.out.println("--------------------");
}
private static Item makeItem(long id, String subject, String content, int regionId, int categoryId, float price) {
Item item = new Item();
item.setId(id);
item.setSubject(subject);
item.setContent(content);
item.setRegionId(regionId);
item.setCategoryId(categoryId);
item.setPrice(price);
return item;
}
}
运行结果：
如果把测试例子中的这句query:
query.setQuery("*:*");
修改为：
query.setQuery("subject:*出租* && price:");
运行结果将为：
如果将：
query.setFacetMinCount(1); // 设置facet最少的统计数量
修改为：
query.setFacetMinCount(0); // 设置facet最少的统计数量
运行结果为：
比较上面两个运行结果图可以看出，这个setFacetMinCount(...)方法是过滤将最少统计量的数据
当然，也可以使用solr admin的浏览器地址栏进行访问查询：
http://localhost:8899/solr/mycore/select?q=subject:*出租* AND price :[1000 TO 8000]&wt=json&indent=true&facet=true&facet.field=categoryId&facet.field=regionId&facet.sort=count
运行输出：
页:
[1]