Elasticsearch 2.20 JAVA開發篇:索引文檔操作
來自: http://my.oschina.net/secisland/blog/616549
既然是開發篇,主要以代碼為主,輔助一些說明。所有的內容都是代碼實際應該驗證過的。
引入的頭文件:
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.*;
創建索引
XContentBuilder mapping = XContentFactory.jsonBuilder()
.startObject()
.startObject("settings")
.field("number_of_shards", 1)//設置分片數量
.field("number_of_replicas", 0)//設置副本數量
.endObject()
.endObject()
.startObject()
.startObject(type)//type名稱
.startObject("properties") //下面是設置文檔列屬性。
.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名稱
.setSource(mapping);
CreateIndexResponse response = cirb.execute().actionGet();
if (response.isAcknowledged()) {
System.out.println("Index created.");
} else {
System.err.println("Index creation failed.");
} 增加文檔
IndexResponse response = client
.prepareIndex(indexName, type, "1")
.setSource(//這里可以直接用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()); 查詢文檔
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(); 本文由賽克藍德(secisland)原創,轉載請標明作者和出處。
修改文檔
修改文檔有兩種方式,一種是直接修改,另一種是如果文檔不存在則插入存在則修改。
第一種代碼
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(); 第二種代碼:
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(); 刪除文檔
DeleteResponse dresponse = client.prepareDelete("secilog", "log", "4").get();
boolean isFound = dresponse.isFound(); //文檔存在返回true,不存在返回false; 刪除索引
DeleteIndexRequest delete = new DeleteIndexRequest("secilog");
client.admin().indices().delete(delete); 賽克藍德(secisland)后續會逐步對Elasticsearch的最新版本的各項功能進行分析,近請期待。也歡迎加入secisland公眾號進行關注。
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