ElasticSearch Java Api(三) -更新索引库

官网文档：https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-update.html

一、UpdateRequest

创建一个UpdateRequest,然后将其发送给client.

UpdateRequest uRequest = new UpdateRequest();
            uRequest.index("blog");
            uRequest.type("article"); uRequest.id("2"); uRequest.doc(jsonBuilder().startObject().field("content", "学习目标 掌握java泛型的产生意义ssss").endObject()); client.update(uRequest).get();

二、prepareUpdate()

2.1使用脚本方式

首先打开elasticsearch-2.3.3/config/elasticsearch.yml,新增一行：

script.engine.groovy.inline.update: on

之后重启elasticsearch.

client.prepareUpdate("blog", "article", "1")
                .setScript(new Script("ctx._source.title = \"git入门\"", ScriptService.ScriptType.INLINE, null, null)) .get();

2.2用doc方式

client.prepareUpdate("blog", "article", "1")
                    .setDoc(jsonBuilder().startObject().field("content", "SVN与Git对比。。。").endObject()).get(); 

三、updateRequest

UpdateRequest updateRequest = new UpdateRequest("blog", "article", "1")
                    .doc(jsonBuilder().startObject().field("commet", "0").endObject()); client.update(updateRequest).get();

这种方式可以新增字段。

四、upsert

如果文档不存在则创建新的索引.

IndexRequest indexRequest = new IndexRequest("blog", "article", "10").source(jsonBuilder().startObject() .field("title", "Git安装10").field("content", "学习目标 git。。。10").endObject()); UpdateRequest uRequest2 = new UpdateRequest("blog", "article", "10").doc( jsonBuilder().startObject().field("title", "Git安装").field("content", "学习目标 git。。。").endObject()) .upsert(indexRequest); client.update(uRequest2).get();

这个例子中，如果blog/article/10存在，那么根据UpdateRequest更新索引；如果不存在，新建indexRequest索引.

五、java demo

package cn.com.bropen.es;

import java.io.IOException; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.concurrent.ExecutionException; import org.elasticsearch.action.index.IndexRequest; import org.elasticsearch.action.update.UpdateRequest; import org.elasticsearch.client.Client; import org.elasticsearch.client.transport.TransportClient; import org.elasticsearch.common.transport.InetSocketTransportAddress; import org.elasticsearch.script.Script; import org.elasticsearch.script.ScriptService; import static org.elasticsearch.common.xcontent.XContentFactory.*; public class ElasticSearchUpdate { private static Client client; public static void main(String[] args) { try { // client startup client = TransportClient.builder().build() .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300)); } catch (UnknownHostException e) { e.printStackTrace(); } upMethod1(); } public static void upMethod1() { try { // 方法一:创建一个UpdateRequest,然后将其发送给client. UpdateRequest uRequest = new UpdateRequest(); uRequest.index("blog"); uRequest.type("article"); uRequest.id("22"); uRequest.doc(jsonBuilder().startObject().field("content", "学习目标 掌握java泛型的产生意义ssss").endObject()); client.update(uRequest).get(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } } public static void upMethod2() { // 方法二:prepareUpdate() 使用脚本更新索引 client.prepareUpdate("blog", "article", "1") .setScript(new Script("ctx._source.title = \"git入门\"", ScriptService.ScriptType.INLINE, null, null)) .get(); } public static void upMethod3() { // 方法三:prepareUpdate() 使用doc更新索引 try { client.prepareUpdate("blog", "article", "1") .setDoc(jsonBuilder().startObject().field("content", "SVN与Git对比。。。").endObject()).get(); } catch (IOException e) { e.printStackTrace(); } } public static void upMethod4() { // 方法四: 增加新的字段 try { UpdateRequest updateRequest = new UpdateRequest("blog", "article", "1") .doc(jsonBuilder().startObject().field("commet", "0").endObject()); client.update(updateRequest).get(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } } public static void upMethod5() { // 方法五：upsert 如果文档不存在则创建新的索引 try { IndexRequest indexRequest = new IndexRequest("blog", "article", "10").source(jsonBuilder().startObject() .field("title", "Git安装10").field("content", "学习目标 git。。。10").endObject()); UpdateRequest uRequest2 = new UpdateRequest("blog", "article", "10").doc( jsonBuilder().startObject().field("title", "Git安装").field("content", "学习目标 git。。。").endObject()) .upsert(indexRequest); client.update(uRequest2).get(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } catch (ExecutionException e) { e.printStackTrace(); } } }