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;}}
自己鼓捣鼓捣吧，有问题加群问我，Pagination对象我没公开，这个是系统里的，和这个查询没关系，你可以替换成你的Page对象即可。