package org.dennisit.util; import java.io.IOException; import org.dennisit.entity.Medicine; import org.elasticsearch.common.xcontent.XContentBuilder; import org.elasticsearch.common.xcontent.XContentFactory; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="https://www.linuxidc.com/mailto:DennisIT@163.com">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-8 上午11:34:56 * * @function： TODO * */ public class JsonUtil { /** * 实现将实体对象转换成json对象 * @param medicine Medicine对象 * @return */ public static String obj2JsonData(Medicine medicine){ String jsonData = null; try { //使用XContentBuilder创建json数据 XContentBuilder jsonBuild = XContentFactory.jsonBuilder(); jsonBuild.startObject() .field("id",medicine.getId()) .field("name", medicine.getName()) .field("funciton",medicine.getFunction()) .endObject(); jsonData = jsonBuild.string(); System.out.println(jsonData); } catch (IOException e) { e.printStackTrace(); } return jsonData; } }
ElasticSearch核心搜索模拟类
package org.dennisit.elastic.process; import java.util.ArrayList; import java.util.List; import org.dennisit.entity.DataFactory; import org.dennisit.entity.Medicine; import org.elasticsearch.action.index.IndexRequestBuilder; import org.elasticsearch.action.index.IndexResponse; import org.elasticsearch.action.search.SearchResponse; import org.elasticsearch.client.Client; import org.elasticsearch.client.transport.TransportClient; import org.elasticsearch.common.transport.InetSocketTransportAddress; import org.elasticsearch.index.query.QueryBuilder; import org.elasticsearch.index.query.QueryBuilders; import org.elasticsearch.search.SearchHit; import org.elasticsearch.search.SearchHits; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="https://www.linuxidc.com/mailto:DennisIT@163.com">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-8 上午11:34:04 * * @function： TODO * */ public class ElasticSearchHandler { private Client client; public ElasticSearchHandler(){ //使用本机做为节点 this("127.0.0.1"); } public ElasticSearchHandler(String ipAddress){ //集群连接超时设置 /* Settings settings = ImmutableSettings.settingsBuilder().put("client.transport.ping_timeout", "10s").build(); client = new TransportClient(settings); */ client = new TransportClient().addTransportAddress(new InetSocketTransportAddress(ipAddress, 9300)); } /** * 建立索引,索引建立好之后,会在elasticsearch-0.20.6\data\elasticsearch\nodes\0创建所以你看 * @param indexName 为索引库名，一个es集群中可以有多个索引库。 名称必须为小写 * @param indexType Type为索引类型，是用来区分同索引库下不同类型的数据的，一个索引库下可以有多个索引类型。 * @param jsondata json格式的数据集合 * * @return */ public void createIndexResponse(String indexname, String type, List<String> jsondata){ //创建索引库 需要注意的是.setRefresh(true)这里一定要设置,否则第一次建立索引查找不到数据 IndexRequestBuilder requestBuilder = client.prepareIndex(indexname, type).setRefresh(true); for(int i=0; i<jsondata.size(); i++){ requestBuilder.setSource(jsondata.get(i)).execute().actionGet(); } } /** * 创建索引 * @param client * @param jsondata * @return */ public IndexResponse createIndexResponse(String indexname, String type,String jsondata){ IndexResponse response = client.prepareIndex(indexname, type) .setSource(jsondata) .execute() .actionGet(); return response; } /** * 执行搜索 * @param queryBuilder * @param indexname * @param type * @return */ public List<Medicine> searcher(QueryBuilder queryBuilder, String indexname, String type){ List<Medicine> list = new ArrayList<Medicine>(); SearchResponse searchResponse = client.prepareSearch(indexname).setTypes(type) .setQuery(queryBuilder) .execute() .actionGet(); SearchHits hits = searchResponse.hits(); System.out.println("查询到记录数=" + hits.getTotalHits()); SearchHit[] searchHists = hits.getHits(); if(searchHists.length>0){ for(SearchHit hit:searchHists){ Integer id = (Integer)hit.getSource().get("id"); String name = (String) hit.getSource().get("name"); String function = (String) hit.getSource().get("funciton"); list.add(new Medicine(id, name, function)); } } return list; } public static void main(String[] args) { ElasticSearchHandler esHandler = new ElasticSearchHandler(); List<String> jsondata = DataFactory.getInitJsonData(); String indexname = "indexdemo"; String type = "typedemo"; esHandler.createIndexResponse(indexname, type, jsondata); //查询条件 QueryBuilder queryBuilder = QueryBuilders.fieldQuery("name", "感冒"); /*QueryBuilder queryBuilder = QueryBuilders.boolQuery() .must(QueryBuilders.termQuery("id", 1));*/ List<Medicine> result = esHandler.searcher(queryBuilder, indexname, type); for(int i=0; i<result.size(); i++){ Medicine medicine = result.get(i); System.out.println("(" + medicine.getId() + ")药品名称:" +medicine.getName() + "\t\t" + medicine.getFunction()); } } }