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Elasticsearch5.x创建索引（Java）
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索引创建代码使用官方给的示例代码，我把它在java项目里实现了一遍。
官方示例
1、创建索引
/**
* Java创建Index
*/
public void CreateIndex() {
int i = 0;
List<IndexDomain> list = getIndexList(); for (IndexDomain indexDomain : list) {
if (indexExists(indexDomain.getIndex())) {
continue;
} // create indexDomain, setting, put mapping
adminClient.prepareCreate(indexDomain.getIndex())
.setSettings(Settings.builder()
.put("indexDomain.number_of_shards", indexDomain.getNumber_of_shards())
.put("indexDomain.number_of_replicas", indexDomain.getNumber_of_replicas())
)
.addMapping(indexDomain.getType(), indexDomain.getFieldsJson())
.get(); i++;
}
System.out.println("IndexDomain creation success! create " + i + " IndexDomain");
}
2、附一些其它小方法：
2.1 集群初始化
private Client client;
private IndicesAdminClient adminClient; /**
* 构造方法 单例
*/
public Elasticsearch() {
try {
init();
} catch (Exception e) {
System.out.println("init() exception!");
e.printStackTrace();
}
adminClient = client.admin().indices();
} /**
* 集群配置初始化方法
*
* @throws Exception
*/
private void init() throws Exception {
// 读取配置文件中数据
Properties properties = readElasticsearchConfig();
String clusterName = properties.getProperty("clusterName");
String[] inetAddresses = properties.getProperty("hosts").split(","); Settings settings = Settings.builder().put("cluster.name", clusterName).build(); client = new PreBuiltTransportClient(settings); for (int i = 0; i < inetAddresses.length; i++) {
String[] tmpArray = inetAddresses[i].split(":");
String ip = tmpArray[0];
int port = Integer.valueOf(tmpArray[1]); client = ((TransportClient) client).addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(ip), port));
}
}
2.2 读取ES配置信息
/**
* 读取ES配置信息
*
* @return
*/
public Properties readElasticsearchConfig() {
Properties properties = new Properties();
try {
InputStream is = this.getClass().getClassLoader().getResourceAsStream("elasticsearch.properties");
properties.load(new InputStreamReader(is, "UTF-8"));
} catch (IOException e) {
System.out.println("readEsConfig exception!");
e.printStackTrace();
}
return properties;
}
elasticsearch.properties
hosts: 192.168.33.5:9300,192.168.33.50:9300
clusterName: my-es-analyze
2.3 读取json配置文件
/**
* 读取json配置文件
*
* @return JSONArray
* @throws IOException
*/
public JSONArray readJosnFile() throws IOException {
InputStream is = this.getClass().getClassLoader().getResourceAsStream("index.json");
BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
StringBuffer sb = new StringBuffer();
String tmp = null;
while ((tmp = br.readLine()) != null) {
sb.append(tmp);
}
JSONArray result = JSONArray.parseArray(sb.toString());
return result;
}
index.json
[
{
"index": "caixiao",
"type": "compensate",
"number_of_shards": 2,
"number_of_replicas": 1,
"fieldsSource": {
"compensate": {
"properties": {
"name": {
"type": "string"
},
"message": {
"type": "string"
},"createtime": {
"type": "date"
}
}
}
}
}
]
2.4 判断集群中索引是否存在
/**
* 判断集群中{Index}是否存在
*
* @param index
* @return 存在（true）、不存在（false）
*/
public boolean indexExists(String index) {
IndicesExistsRequest request = new IndicesExistsRequest(index);
IndicesExistsResponse response = adminClient.exists(request).actionGet();
if (response.isExists()) {
return true;
}
return false;
}
2.5 创建索引实体类
/**
* 获取要创建的index列表
*
* @return List<IndexDomain>
*/
public List<IndexDomain> getIndexList() { List<IndexDomain> result = new ArrayList<IndexDomain>();
JSONArray jsonArray = null;
try {
jsonArray = readJosnFile();
} catch (IOException e) {
System.out.println("readJsonFile exception!");
e.printStackTrace();
} if (jsonArray == null || jsonArray.size() == 0) {
return null;
} for (int i = 0; i < jsonArray.size(); i++) {
JSONObject jsonObject = jsonArray.getJSONObject(i);
IndexDomain indexDomainObject = new IndexDomain();
String index = jsonObject.getString("index");
String type = jsonObject.getString("type");
Integer number_of_shards = jsonObject.getInteger("number_of_shards");
Integer number_of_replicas = jsonObject.getInteger("number_of_replicas");
String fieldsSource = jsonObject.get("fieldsSource").toString(); indexDomainObject.setIndex(index);
indexDomainObject.setType(type);
indexDomainObject.setFieldsJson(fieldsSource);
indexDomainObject.setNumber_of_shards(number_of_shards);
indexDomainObject.setNumber_of_replicas(number_of_replicas);
result.add(indexDomainObject);
}
return result;
}
2.6 索引实体类
public class IndexDomain {
private String index; //索引名
private String type; //type表名
private Integer number_of_shards; //分片数
private Integer number_of_replicas; //备份数
private String fieldsJson; //字段类型
public String getIndex() {
return index;
}
public void setIndex(String index) {
this.index = index;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getFieldsJson() {
return fieldsJson;
}
public void setFieldsJson(String fieldsJson) {
this.fieldsJson = fieldsJson;
}
public Integer getNumber_of_shards() {
return number_of_shards;
}
public void setNumber_of_shards(Integer number_of_shards) {
this.number_of_shards = number_of_shards;
}
public Integer getNumber_of_replicas() {
return number_of_replicas;
}
public void setNumber_of_replicas(Integer number_of_replicas) {
this.number_of_replicas = number_of_replicas;
}
}
2.7 log4j2.properties
appender.console.type = Console
appender.console.name = console
appender.console.layout.type = PatternLayout rootLogger.level = info
rootLogger.appenderRef.console.ref = console
2.8 pom文件依赖
<properties>
<elasticsearch.version>5.3.0</elasticsearch.version>
<log4j.version>2.8.2</log4j.version>
<fastjson.version>1.2.31</fastjson.version>
</properties> <dependencies>
<!-- Elasticsearch -->
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>${elasticsearch.version}</version>
</dependency> <!-- Log4j -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j.version}</version>
</dependency> <!-- Alibaba Json -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>${fastjson.version}</version>
</dependency>
</dependencies>
