Elasticsearch 的查询很灵活，并且有Filter，有分组功能，还有ScriptFilter等等，所以很强大。下面上代码：
一个简单的查询，返回一个List<对象> .。
/** * 根据Id 查询 SOBangg * @param key * @return */ public static List findSOBanggById(String id) { Client client = ESTools.client; SearchResponse response = client.prepareSearch(MappingManager.INDEX) .setTypes(MappingManager.B_TYPE) .setSearchType(SearchType.DFS_QUERY_THEN_FETCH) .setQuery(QueryBuilders.termQuery("id",id)) // Query
.setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18)) // Filter .setFrom(0).setSize(60).setExplain(true) .execute() .actionGet(); SearchHits hits = response.getHits(); List list = new ArrayList(); for (SearchHit searchHit : hits) { Map source = searchHit.getSource(); SOBangg entity = (SOBangg) JSONObject.toBean(JSONObject.fromObject(source) , SOBangg.class); list.add(entity); } return list; }
下面我把我整个类贴出来。
package com.sojson.core.elasticsearch.manager; import java.util.ArrayList; import java.util.List; import java.util.Map; import net.sf.json.JSONObject; import org.elasticsearch.action.get.GetRequest; import org.elasticsearch.action.get.GetResponse; import org.elasticsearch.action.search.SearchRequestBuilder; import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.action.search.SearchType; import org.elasticsearch.client.Client; import org.elasticsearch.common.unit.TimeValue; import org.elasticsearch.index.query.QueryBuilder; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.SearchHits; import com.sojson.common.model.SOBang; import com.sojson.common.model.SOBangg; import com.sojson.common.model.SOBanggKey; import com.sojson.core.elasticsearch.utils.ESTools; import com.sojson.core.mybatis.page.Pagination; public class SelectManager { /** * 分页查询 SOBang * @param resultMap * @param pageSize * @param pageNo * @return */ public static Pagination findByPage(Map resultMap, Integer pageSize, Integer pageNo){ Pagination page = new Pagination(); pageNo = null==pageNo?1:pageNo; page.setPageNo(pageNo); page.setPageSize(pageSize); Client client = ESTools.client; SearchRequestBuilder srb = client.prepareSearch(MappingManager.INDEX); srb.setSearchType(SearchType.DFS_QUERY_THEN_FETCH); srb.setTypes(MappingManager.TYPE); // srb.setQuery(resultMap); srb.setFrom((pageNo - 1) * pageSize).setSize(pageSize) .setExplain(true); SearchResponse response = srb.execute().actionGet(); SearchHits hits = response.getHits(); page.setTotalCount((int)hits.getTotalHits()); List list = new ArrayList(); for (SearchHit searchHit : hits) { Map source = searchHit.getSource(); SOBang entity = (SOBang)JSONObject.toBean(JSONObject.fromObject(source) , SOBang.class); list.add(entity); } page.setList(list); return page; } /** * 分页查询 SOBangg * @param resultMap * @param pageSize * @param pageNo * @return */ public static Pagination findSOBanggByPage(Map resultMap, Integer pageSize, Integer pageNo){ Pagination page = new Pagination(); pageNo = null==pageNo?1:pageNo; page.setPageNo(pageNo); page.setPageSize(pageSize); Client client = ESTools.client; SearchRequestBuilder srb = client.prepareSearch(MappingManager.INDEX); srb.setSearchType(SearchType.DFS_QUERY_THEN_FETCH); srb.setTypes(MappingManager.B_TYPE); srb.setQuery(QueryBuilders.termQuery("status",0)); srb.setFrom((pageNo - 1) * pageSize).setSize(pageSize) .setExplain(true); SearchResponse response = srb.execute().actionGet(); SearchHits hits = response.getHits(); page.setTotalCount((int)hits.getTotalHits()); List list = new ArrayList(); for (SearchHit searchHit : hits) { Map source = searchHit.getSource(); SOBangg entity = (SOBangg) JSONObject .toBean(JSONObject.fromObject(source) , SOBangg.class); list.add(entity); } page.setList(list); return page; } /** * 根据ID查询SOBang * @param id * @return */ public static SOBang findSOBangById(String id){ GetRequest rq = new GetRequest(MappingManager.INDEX, MappingManager.TYPE, id); //GetResponse response = client.prepareGet(MappingManager.INDEX, MappingManager.TYPE, id); GetResponse response = ESTools.client.get(rq).actionGet(); SOBang entity = null; //判断非空 if(!response.isSourceEmpty()){ Map data = response.getSource(); entity = (SOBang)JSONObject.toBean(JSONObject.fromObject(data) ,SOBang.class); } return entity; } /** * 根据Key 查询 SOBangg * @param key * @return */ public static SOBangg findSOBanggByKey(SOBanggKey key) { String prefix = "%sx_x%s"; String id = String.format(prefix, key.getId(),key.getGid()); GetRequest rq = new GetRequest(MappingManager.INDEX, MappingManager.B_TYPE, id); //GetResponse response = client.prepareGet(MappingManager.INDEX, MappingManager.TYPE, id); GetResponse response = ESTools.client.get(rq).actionGet(); SOBangg entity = null; //判断非空 if(!response.isSourceEmpty()){ Map data = response.getSource(); entity = (SOBangg)JSONObject.toBean(JSONObject.fromObject(data) ,SOBangg.class); } return entity; } /** * 根据Id 查询 SOBangg * @param key * @return */ public static List findSOBanggById(String id) { Client client = ESTools.client; SearchResponse response = client.prepareSearch(MappingManager.INDEX) .setTypes(MappingManager.B_TYPE) .setSearchType(SearchType.DFS_QUERY_THEN_FETCH) .setQuery(QueryBuilders.termQuery("id",id)) // Query // .setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18)) // Filter .setFrom(0).setSize(60).setExplain(true) .execute() .actionGet(); SearchHits hits = response.getHits(); List list = new ArrayList(); for (SearchHit searchHit : hits) { Map source = searchHit.getSource(); SOBangg entity = (SOBangg) JSONObject.toBean(JSONObject.fromObject(source) , SOBangg.class); list.add(entity); } return list; } public static BangDetailsBo findById(String id) { BangDetailsBo result = new BangDetailsBo(); GetRequest rq = new GetRequest(MappingManager.INDEX, MappingManager.TYPE, id); GetResponse response = ESTools.client.get(rq).actionGet(); //判断非空 if(!response.isSourceEmpty()){ Map data = response.getSource(); SOBang entity = (SOBang)JSONObject.toBean(JSONObject.fromObject(data) ,SOBang.class); result.setEntity(entity); } return result; } }