elasticsearch java 增删改查 版本1

既然是开发篇，主要以代码为主，辅助一些说明。所有的内容都是代码实际应该验证过的。

引入的头文件：

import static org.elasticsearch.node.NodeBuilder.nodeBuilder;

import java.io.IOException;
import java.net.InetAddress;
import java.util.Date;
import java.util.Map;
import java.util.Set;

import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.ClusterAdminClient;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.cluster.health.ClusterIndexHealth;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.node.Node;
import static org.elasticsearch.common.xcontent.XContentFactory.*;

创建索引

XContentBuilder mapping = XContentFactory.jsonBuilder()
.startObject()
.startObject("settings")
.field("number_of_shards", 1)//设置分片数量
.field("number_of_replicas", 0)//设置副本数量
.endObject()
.endObject()
.startObject()
.startObject(type)//type名称
.startObject("properties") //下面是设置文档列属性。
.startObject("type").field("type", "string").field("store", "yes").endObject()
.startObject("eventCount").field("type", "long").field("store", "yes").endObject()
.startObject("eventDate").field("type", "date").field("format", "dateOptionalTime").field("store", "yes").endObject()
.startObject("message").field("type", "string").field("index", "not_analyzed").field("store", "yes").endObject()
.endObject()
.endObject()
.endObject();

CreateIndexRequestBuilder cirb = client
.admin()
.indices()
.prepareCreate(indexName)//index名称
.setSource(mapping);

CreateIndexResponse response = cirb.execute().actionGet();
if (response.isAcknowledged()) {
System.out.println("Index created.");
} else {
System.err.println("Index creation failed.");
}

增加文档

IndexResponse response = client
.prepareIndex(indexName, type, "1")
.setSource(//这里可以直接用json字符串
jsonBuilder().startObject()
.field("type", "syslog")
.field("eventCount", 1)
.field("eventDate", new Date())
.field("message", "secilog insert doc test")
.endObject()).get();
System.out.println("index:"+response.getIndex()
+" insert doc id:"+response.getId()
+" result:"+response.isCreated());

查询文档

GetResponse response = client.prepareGet("secilog", "log", "1").get();
String source = response.getSource().toString();
long version = response.getVersion();
String indexName = response.getIndex();
String type = response.getType();
String id = response.getId();

修改文档

修改文档有两种方式，一种是直接修改，另一种是如果文档不存在则插入存在则修改。

第一种代码

UpdateRequest updateRequest = new UpdateRequest();
updateRequest.index(indexName);
updateRequest.type(type);
updateRequest.id("1");
updateRequest.doc(jsonBuilder()
.startObject()
.field("type", "file")
.endObject());
client.update(updateRequest).get();

第二种代码：

IndexRequest indexRequest = new IndexRequest(indexName, type, "3")
.source(jsonBuilder()
.startObject()
.field("type", "syslog")
.field("eventCount", 2)
.field("eventDate", new Date())
.field("message", "secilog insert doc test")
.endObject());
UpdateRequest updateRequest = new UpdateRequest(indexName, type, "3")
.doc(jsonBuilder()
.startObject()
.field("type", "file")
.endObject())
.upsert(indexRequest);
client.update(updateRequest).get();

删除文档

DeleteResponse dresponse = client.prepareDelete("secilog", "log", "4").get();
boolean isFound = dresponse.isFound(); //文档存在返回true,不存在返回false；

删除索引

DeleteIndexRequest delete = new DeleteIndexRequest("secilog");
client.admin().indices().delete(delete);