03、ElasticSearch 实战：Java操作ElasticSearch索引之CRUD
1 package com.gxy.ESChap01;
2
3 import java.net.InetAddress;
4 import java.util.HashMap;
5 import java.util.Map;
6
7 import org.elasticsearch.action.delete.DeleteResponse;
8 import org.elasticsearch.action.get.GetResponse;
9 import org.elasticsearch.action.index.IndexResponse;
10 import org.elasticsearch.action.update.UpdateRequest;
11 import org.elasticsearch.action.update.UpdateResponse;
12 import org.elasticsearch.client.transport.TransportClient;
13 import org.elasticsearch.common.settings.Settings;
14 import org.elasticsearch.common.transport.InetSocketTransportAddress;
15 import org.elasticsearch.common.xcontent.XContentFactory;
16 import org.elasticsearch.common.xcontent.XContentType;
17 import org.elasticsearch.transport.client.PreBuiltTransportClient;
18 import org.junit.After;
19 import org.junit.Before;
20 import org.junit.Test;
21
22 import com.google.gson.JsonObject;
23
24
25 public class ESIndex {
26
27 private static String host="192.168.56.3"; // 服务器地址
28 private static int port=9300; // 端口
29
30 private TransportClient client=null;
31
32
33 //获取客户端
34 @SuppressWarnings({ "resource", "unchecked" })
35 @Before
36 public void getClient() throws Exception {
37 try {
38 client = new PreBuiltTransportClient(Settings.EMPTY)
39 .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(host),port));
40 } catch (Exception e) {
41 // TODO Auto-generated catch block
42 e.printStackTrace();
43 }
44 }
45
46 //关闭客户端
47 @After
48 public void close() {
49 if(client!=null) {
50 client.close();
51 }
52 }
53 /***
54 * 创建索引，添加文档
55 * @throws Exception
56 */
57 @Test
58 public void testIndex() throws Exception {
59 IndexResponse response=client.prepareIndex("book","java","1")
60 .setSource(XContentFactory.jsonBuilder()
61 .startObject()
62 .field("name","MySQL从入门到删库跑路")
63 .field("publishDate","2012-11-11")
64 .field("price",100)
65 .endObject()).get();
66 System.out.println("索引名称："+response.getIndex());
67 System.out.println("类型:"+response.getType());
68 System.out.println("文档ID："+response.getId());
69 System.out.println("当前实例状态："+response.status());
70
71 }
72 /**
73 * 添加文档，创建索引
74 */
75 @Test
76 public void TestIndex2() {
77 JsonObject jsonObiect=new JsonObject();
78 jsonObiect.addProperty("name", "java从入门到放弃");
79 jsonObiect.addProperty("publishDate", "2018-05-06");
80 jsonObiect.addProperty("price", 62);
81 System.out.println(jsonObiect);
82 IndexResponse response=client.prepareIndex("book", "java", "2")
83 .setSource(jsonObiect.toString(), XContentType.JSON).get();
84 System.out.println("索引名称："+response.getIndex());
85 System.out.println("类型："+response.getType());
86 System.out.println("文档ID："+response.getId());
87 System.out.println("当前实例状态："+response.status());
88
89 }
90
91 /**
92 * 根据ID获取文档
93 */
94 @Test
95 public void testGetById() {
96 GetResponse response=client.prepareGet("book","java","1").get();
97 System.out.println(response.getSourceAsString());
98 }
99 /***
100 * 根据ID修改文档
101 * @throws Exception
102 * @throws InterruptedException
103 */
104 @Test
105 public void testUpdate() throws InterruptedException, Exception {
106 UpdateRequest request=new UpdateRequest("book","java","1");
107 Map<String,Object> source = new HashMap<String, Object>();
108 source.put("name", "python网络爬虫");
109 source.put("publishDate", "2012-11-12");
110 source.put("price", 102);
111 request.doc(source);
112 UpdateResponse response=client.update(request).get();
113 System.out.println("索引名称："+response.getIndex());
114 System.out.println("类型："+response.getType());
115 System.out.println("文档ID："+response.getId());
116 System.out.println("当前实例状态："+response.status());
117 }
118 /**
119 * 根据ID删除文档
120 */
121 @Test
122 public void testDelete() {
123 DeleteResponse response=client.prepareDelete("book","java","1").get();
124 System.out.println("索引名称："+response.getIndex());
125 System.out.println("类型："+response.getType());
126 System.out.println("文档ID："+response.getId());
127 System.out.println("当前实例状态："+response.status());
128 }
129 }
注意：ElasticSearch中通过HTTP请求的端口为9200，通过Java API 请求的端口为9300！！！