刪除索引的方式很多，這里列舉三種。

1. 指定 index 、type、id 執行刪除

   1. package com.gsoft.gsearch.util;import org.elasticsearch.action.get.GetResponse;
      import org.junit.Test;import com.gsoft.gsearch.BaseTest;
      import com.gsoft.gsearch.entity.Person;public class DeleteTest extends BaseTest {@Testpublic void delete() {try {String id = "1234567890";Person p = new Person();p.setId(id);p.setAge(20);p.setIsStudent(false);p.setSex("男");p.setName("張三的車");String source = ElasticSearchUtil.BeanToJson(p);// 創建索引client.prepareIndex(index, type, id).setSource(source).execute();System.out.println("休息6秒鐘，以便創建索引");Thread.sleep(6000);// GetSystem.out.println("================================第一次Get");showById(id);client.prepareDelete(index, type, id).execute();System.out.println("休息6秒鐘，以便刪除索引");Thread.sleep(6000);System.out.println("================================第二次Get");showById(id);} catch (Exception e) {e.printStackTrace();} finally {if (null != client) {client.close();}if (null != node) {node.close();}}}/*** 根據ID查詢，使用Get* @param id* @throws Exception*/private void showById(String id) throws Exception {GetResponse response = client.prepareGet(index, type, id).execute().actionGet();String json = response.getSourceAsString();if (null != json) {Person newPerson = mapper.readValue(json, Person.class);System.out.println("id\t\t" + newPerson.getId());System.out.println("name\t\t" + newPerson.getName());System.out.println("sex\t\t" + newPerson.getSex());System.out.println("age\t\t" + newPerson.getAge());System.out.println("isStudent\t\t" + newPerson.getIsStudent());} else {log.info("未查詢到任何結果！");}}
      }
      

      ?

2. 使用 Bulk 執行批量操作

   1. package com.gsoft.gsearch.util;import org.elasticsearch.action.bulk.BulkRequestBuilder;
      import org.elasticsearch.action.search.SearchResponse;
      import org.elasticsearch.index.query.QueryBuilder;
      import org.elasticsearch.index.query.QueryBuilders;
      import org.elasticsearch.search.SearchHit;
      import org.elasticsearch.search.SearchHits;
      import org.junit.Test;import com.gsoft.gsearch.BaseTest;
      import com.gsoft.gsearch.entity.Person;public class BulkDeleteTest extends BaseTest {@Testpublic void delete() {try {String id = "1234567890";BulkRequestBuilder builder1 = client.prepareBulk();for (int i = 0; i < 5; i++) {String myId = id + "_" + i;Person p = new Person();p.setId(myId);p.setAge(20);p.setIsStudent(false);p.setSex("男");p.setName("張三的車");String source = ElasticSearchUtil.BeanToJson(p);// 創建索引builder1.add(client.prepareIndex(index, type, myId).setSource(source).request());}builder1.execute();System.out.println("休息6秒鐘，以便創建索引");Thread.sleep(6000);// GetSystem.out.println("================================第一次查詢");query();BulkRequestBuilder builder = client.prepareBulk();for (int i = 0; i < 5; i++) {String myId = id + "_" + i;builder.add(client.prepareDelete(index, type, myId).request());}builder.execute();System.out.println("休息6秒鐘，以便刪除索引");Thread.sleep(6000);System.out.println("================================第二次查詢");query();} catch (Exception e) {e.printStackTrace();} finally {if (null != client) {client.close();}if (null != node) {node.close();}}}private void query() throws Exception {// 檢索QueryBuilder qb = QueryBuilders.matchPhraseQuery("name", "張三的車");SearchResponse searchResponse = client.prepareSearch(index).setTypes(type).setQuery(qb).setFrom(0).setSize(12).execute().actionGet();SearchHits hits = searchResponse.getHits();if (null == hits || hits.totalHits() == 0) {log.error("使用\"張三的車\"沒有查詢到任何結果！");} else {for (SearchHit hit : hits) {String json = hit.getSourceAsString();Person newPerson = mapper.readValue(json, Person.class);System.out.println("id\t\t" + newPerson.getId());System.out.println("name\t\t" + newPerson.getName());System.out.println("sex\t\t" + newPerson.getSex());System.out.println("age\t\t" + newPerson.getAge());System.out.println("isStudent\t\t" + newPerson.getIsStudent());System.out.println("+++++++++++++++++++++++++++++++++++++++++++++++++++");}}}
      }
      

      ?

3. 根據條件刪除匹配的索引

   1. QueryBuild qb = QueryBuilders.matchAllQuery();
      client.prepareDeleteQuery(indeices).setQuery(qb).execute();

      ?

?

第一種 和 第二種 需要知道 索引的ID后方可執行刪除，局限性較大，第三種根據條件刪除匹配索引，也比比較簡單。

?

?

?

?