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

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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();
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二、prepareUpdate()

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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();
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2.2使用doc方式

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

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UpdateRequest updateRequest = new UpdateRequest("blog", "article", "1")                    .doc(jsonBuilder().startObject().field("commet", "0").endObject());            client.update(updateRequest).get();
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这种方式可以新增字段。

四、upsert

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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();
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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

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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();        }    }}