本篇文章代碼實現很少,主要是教你如何用JestClient去實現ElasticSearch上的操做。html
授人以魚不如授人以漁。java
1、說明
一、elasticsearch版本:6.2.4 。linux
jdk版本:1.8(該升級趕忙升級吧,如今不少技術都是最低要求1.8)。apache
jest版本:5.3.3。json
二、一些不錯的文章緩存
一些基本概念的講解:http://www.gaowm.com/categories/Elasticsearch/app
es配置文件參數介紹:https://www.jianshu.com/p/149a8da90bbcelasticsearch
中文ik插件安裝:https://blog.csdn.net/zjcjava/article/details/78653753maven
linux啓動須要更改的一些參數:https://www.cnblogs.com/woxpp/p/6061073.htmlide
2、前提:
一、最好已經大概看過es的官方文檔,附上文檔地址:
中文:https://www.elastic.co/guide/cn/elasticsearch/guide/cn/index.html 雖然已經有點老了,不過仍是能夠看看的。(我英文很差看的這個)
英文:https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html 英文好的直接看英文版的,畢竟是最新的。
二、知道本身須要的es命令:
好比想用jest進行索引模版的相關操做,須要知道操做模版的命令是「template」 等等。而後能在官方文檔裏查到相關命令的詳細操做。
簡單說就是如今已經知道怎麼在 es裏進行相關操做了。如今想要用jest進行實現。
3、開始:
一、pom依賴:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>ceshi</groupId> <artifactId>ceshi</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>io.searchbox</groupId> <artifactId>jest</artifactId> <version>5.3.3</version> </dependency> <dependency> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> <version>6.2.4</version> </dependency> </dependencies> <build> <plugins> <!-- java編譯插件 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build> </project>
二、jest初始化,這裏就不說了。直接開始操做了,簡單說幾個命令拋磚引玉:
索引模版:es命令地址:https://www.elastic.co/guide/cn/elasticsearch/guide/cn/index-templates.html
文檔中能夠看到命令是「_template」。
如今在jest的jar包裏找 「template」相關的類
其實寫到這 大概應該知道啥意思了。補張圖:
寫的有點亂,之後整理吧。
-------------------------2018-07-17------------------------------------
附上本身的代碼實現(index的一些操做)。數據操做以後整理完,再發。
建立index public void createIndex(String index) { try { JestResult jestResult = jestClient.execute(new CreateIndex.Builder(index).build()); System.out.println("createIndex:{}" + jestResult.isSucceeded()); } catch (IOException e) { e.printStackTrace(); } } 刪除index public void deleteIndex(String index) { try { JestResult jestResult = jestClient.execute(new DeleteIndex.Builder(index).build()); System.out.println("deleteIndex result:{}" + jestResult.isSucceeded()); } catch (IOException e) { e.printStackTrace(); } } 設置index的mapping(設置數據類型和分詞方式) public void createIndexMapping(String index, String type, String mappingString) { //mappingString爲拼接好的json格式的mapping串 PutMapping.Builder builder = new PutMapping.Builder(index, type, mappingString); try { JestResult jestResult = jestClient.execute(builder.build()); System.out.println("createIndexMapping result:{}" + jestResult.isSucceeded()); if (!jestResult.isSucceeded()) { System.err.println("settingIndexMapping error:{}" + jestResult.getErrorMessage()); } } catch (IOException e) { e.printStackTrace(); } } 獲取index的mapping public String getMapping(String indexName, String typeName) { GetMapping.Builder builder = new GetMapping.Builder(); builder.addIndex(indexName).addType(typeName); try { JestResult result = jestClient.execute(builder.build()); if (result != null && result.isSucceeded()) { return result.getSourceAsObject(JsonObject.class).toString(); } } catch (Exception e) { e.printStackTrace(); } return null; } 獲取索引index設置setting public boolean getIndexSettings(String index) { try { JestResult jestResult = jestClient.execute(new GetSettings.Builder().addIndex(index).build()); System.out.println(jestResult.getJsonString()); if (jestResult != null) { return jestResult.isSucceeded(); } } catch (IOException e) { e.printStackTrace(); } return false; } 更改索引index設置setting public boolean updateIndexSettings(String index) { String source; XContentBuilder mapBuilder = null; try { mapBuilder = XContentFactory.jsonBuilder(); mapBuilder.startObject().startObject("index").field("max_result_window", "1000000").endObject().endObject(); source = mapBuilder.string(); JestResult jestResult = jestClient.execute(new UpdateSettings.Builder(source).build()); System.out.println(jestResult.getJsonString()); if (jestResult != null) { return jestResult.isSucceeded(); } } catch (IOException e) { e.printStackTrace(); } return false; } 獲取索引 別名 public boolean getIndexAliases(String index) { try { JestResult jestResult = jestClient.execute(new GetAliases.Builder().addIndex(index).build()); System.out.println(jestResult.getJsonString()); if (jestResult != null) { return jestResult.isSucceeded(); } } catch (IOException e) { e.printStackTrace(); } return false; } 添加索引別名 public void addAlias(List<String> index, String alias) { try { AddAliasMapping build = new AddAliasMapping.Builder(index, alias).build(); JestResult jestResult = jestClient.execute(new ModifyAliases.Builder(build).build()); System.out.println("result:" + jestResult.getJsonString()); } catch (IOException e) { e.printStackTrace(); } } 獲取索引模版 public void getTemplate(String template) { try { JestResult jestResult = jestClient.execute(new GetTemplate.Builder(template).build()); System.out.println("result:" + jestResult.getJsonString()); } catch (IOException e) { e.printStackTrace(); } } 添加索引模版 public void putreturnreportTemplate() { String source; XContentBuilder mapBuilder = null; try { mapBuilder = XContentFactory.jsonBuilder(); mapBuilder.startObject().field("template", "df_returnreport*").field("order", 1)// .startObject("settings").field("number_of_shards", 5)//五個分片 .startObject("index").field("max_result_window", "1000000")//一次查詢最大一百萬 .endObject()// .endObject()// .startObject("mappings")// .startObject("df_returnreport")//type名 .startObject("properties")// .startObject("id").field("type", "long").endObject()// .startObject("username").field("type", "keyword").endObject()// .startObject("content").field("type", "text").field("analyzer", "ik_max_word").endObject()// .startObject("returntime").field("type", "date").field("format", "yyyy-MM-dd HH:mm:ss").endObject()// .startObject("gateway").field("type", "integer").endObject()// .endObject()// .endObject()// .endObject()// .startObject("aliases").startObject("df_returnreport").endObject().endObject()//別名 .endObject();// source = mapBuilder.string(); JestResult jestResult = jestClient.execute(new PutTemplate.Builder("my_returnreport", source).build()); System.out.println("result:" + jestResult.getJsonString()); } catch (IOException e) { e.printStackTrace(); } } 索引優化 public void optimizeIndex() { Optimize optimize = new Optimize.Builder().build(); jestClient.executeAsync(optimize, new JestResultHandler<JestResult>() { public void completed(JestResult jestResult) { System.out.println("optimizeIndex result:{}" + jestResult.isSucceeded()); } public void failed(Exception e) { e.printStackTrace(); } }); } 清理緩存 public void clearCache() { try { ClearCache clearCache = new ClearCache.Builder().build(); jestClient.execute(clearCache); } catch (IOException e) { e.printStackTrace(); } }