ES提供了多种编程语言的链接方式,有Java API,PHP API,.NET API

官网可以详细了解

https://www.elastic.co/guide/en/elasticsearch/client/index.html

下面阐述ES支持的客户端链接方式:

1:REST API

可以通过浏览器请求get方法进行链接;

利用Postman等工具发起REST请求;

Java发起HttpClient请求;

2:Transport链接

通过socket链接,用官网一个的TransPort客户端,底层是netty

特别提示:

ES在7.0版本开始将废弃TransportClient,8.0版本开始将完全移除TransportClient

取而代之的是High Level REST Client。

Java High Level REST Client 为高级别的Rest客户端,基于低级别的REST客户端,增加了编组请求JSON串,解析响应JSON串等相关API,使用的版本需要和ES服务端的版本保持一致,否则会有版本问题。

首先在使用Java REST Client的时候引入maven的Jar包依赖:

<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>6.2.4</version>
</dependency>

  

将log4j2.xml编译到classes路径下

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="OFF">
<appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</Console>
</appenders>
<loggers>
<root level="info">
<appender-ref ref="Console"/>
</root>
</loggers>
</configuration>

  

Java High Level REST Client 初始化以及增加修改,批量操作使用示例:

package com.herbert.test;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHost;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.action.DocWriteRequest;
import org.elasticsearch.action.DocWriteResponse;
import org.elasticsearch.action.bulk.BulkItemResponse;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.support.replication.ReplicationResponse;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.RestStatus; import java.io.IOException;
import java.util.*; /**
* Created by Herbert on 2019/1/28.
*/
public class ESUtil { protected RestHighLevelClient client; /**
* Java High Level REST Client 初始化
*/
public ESUtil (){
client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http")));
} /**
* 新增,修改文档
* @param indexName 索引
* @param type mapping type
* @param id 文档id
* @param jsonStr 文档数据
*/
public void addData(String indexName,String type ,String id,String jsonStr) {
try {
// 1、创建索引请求 //索引 // mapping type //文档id
IndexRequest request = new IndexRequest(indexName, type, id); //文档id
// 2、准备文档数据
// 直接给JSON串
request.source(jsonStr, XContentType.JSON);
//4、发送请求
IndexResponse indexResponse = null;
try {
// 同步方式
indexResponse = client.index(request);
} catch (ElasticsearchException e) {
// 捕获,并处理异常
//判断是否版本冲突、create但文档已存在冲突
if (e.status() == RestStatus.CONFLICT) {
System.out.println("冲突了,请在此写冲突处理逻辑!" + e.getDetailedMessage());
}
}
//5、处理响应
if (indexResponse != null) {
String index1 = indexResponse.getIndex();
String type1 = indexResponse.getType();
String id1 = indexResponse.getId();
long version1 = indexResponse.getVersion();
if (indexResponse.getResult() == DocWriteResponse.Result.CREATED) {
System.out.println("新增文档成功!" + index1 + type1 + id1 + version1);
} else if (indexResponse.getResult() == DocWriteResponse.Result.UPDATED) {
System.out.println("修改文档成功!");
}
// 分片处理信息
ReplicationResponse.ShardInfo shardInfo = indexResponse.getShardInfo();
if (shardInfo.getTotal() != shardInfo.getSuccessful()) {
System.out.println("分片处理信息.....");
}
// 如果有分片副本失败,可以获得失败原因信息
if (shardInfo.getFailed() > 0) {
for (ReplicationResponse.ShardInfo.Failure failure : shardInfo.getFailures()) {
String reason = failure.reason();
System.out.println("副本失败原因:" + reason);
}
}
} } catch (Exception e) {
e.printStackTrace();
}
} /**
* 批量插入ES
* @param indexName 索引
* @param type 类型
* @param idName id名称
* @param list 数据集合
*/
public void bulkDate(String indexName,String type ,String idName ,List<Map<String,Object>> list ){
try { if(null == list || list.size()<=0){
return;
}
if(StringUtils.isBlank(indexName) || StringUtils.isBlank(idName) || StringUtils.isBlank(type)){
return;
}
BulkRequest request = new BulkRequest();
for(Map<String,Object> map : list){
if(map.get(idName)!=null){
request.add(new IndexRequest(indexName, type, String.valueOf(map.get(idName)))
.source(map,XContentType.JSON));
}
}
// 2、可选的设置
/*
request.timeout("2m");
request.setRefreshPolicy("wait_for");
request.waitForActiveShards(2);
*/
//3、发送请求
// 同步请求
BulkResponse bulkResponse = client.bulk(request);
//4、处理响应
if(bulkResponse != null) {
for (BulkItemResponse bulkItemResponse : bulkResponse) {
DocWriteResponse itemResponse = bulkItemResponse.getResponse(); if (bulkItemResponse.getOpType() == DocWriteRequest.OpType.INDEX
|| bulkItemResponse.getOpType() == DocWriteRequest.OpType.CREATE) {
IndexResponse indexResponse = (IndexResponse) itemResponse;
//TODO 新增成功的处理
System.out.println("新增成功,{}"+ indexResponse.toString());
} else if (bulkItemResponse.getOpType() == DocWriteRequest.OpType.UPDATE) {
UpdateResponse updateResponse = (UpdateResponse) itemResponse;
//TODO 修改成功的处理
System.out.println("修改成功,{}"+ updateResponse.toString());
} else if (bulkItemResponse.getOpType() == DocWriteRequest.OpType.DELETE) {
DeleteResponse deleteResponse = (DeleteResponse) itemResponse;
//TODO 删除成功的处理
System.out.println("删除成功,{}"+ deleteResponse.toString());
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String ags[]){
Map<String,Object> map1 = new HashMap<String, Object>();
map1.put("id","2");
map1.put("user1","bbherbert1");
map1.put("postDate","2018-08-30");
map1.put("username","aa");
map1.put("message","message");
Map<String,Object> map2 = new HashMap<String, Object>();
map2.put("id","3");
map2.put("user2","bbherbert1");
map2.put("postDate","2018-08-30");
map2.put("username","aa");
map2.put("message","message");
Map<String,Object> map = new HashMap<String, Object>();
map.put("id","1");
map.put("user","bbherbert1");
map.put("postDate","2018-08-30");
map.put("username","aa");
map.put("message","message"); List<Map<String,Object>> list = new ArrayList<Map<String, Object>>();
list.add(map);
list.add(map1);
list.add(map2);
ESUtil esUtil= new ESUtil();
esUtil.bulkDate("book15","boo","id",list);
// Map<String,Object> map = new HashMap<String, Object>();
// map.put("user","herbert1");
// map.put("postDate","2018-08-30");
// map.put("username","aa");
// map.put("message","message");
// String jsonString = JSON.toJSONString(map);
// esUtil.addData("hh","d","4",jsonString);
// esUtil.addData("hh","d","4","{" +
// "\"user\":\"kimchy\"," +
// "\"postDate\":\"2013-01-30\"," +
// "\"username\":\"zhangsan\"," +
// "\"message\":\"trying out Elasticsearch\"" +
// "}");
} }

上述简单的介绍了增加文档的操作示例。详情可参照官方API

最新文章

  1. L2 Population 原理 - 每天5分钟玩转 OpenStack(113)
  2. Linux命令(22)find的使用
  3. Geolocation
  4. struts2视频学习笔记 29-30(Struts 2常用标签,防止表单重复提交)
  5. Javascript模块化编程(三):require.js的用法 (转)
  6. The Aggregate Magic Algorithms
  7. Linux Shell 脚本
  8. Razor视图引擎布局
  9. c# winfrom 委托实现窗体相互传值
  10. build.prop各种优化代码
  11. 常用LINUX脚本汇总(1)
  12. array_multisort 关联(string)键名保持不变,但数字键名会被重新索引。
  13. 两种设计模式和XML解析
  14. MySQL中间件之ProxySQL(8):SQL语句的重写规则
  15. vue问题大全
  16. 最大似然估计实例 | Fitting a Model by Maximum Likelihood (MLE)
  17. 20 约束 异常处理 MD5 日志
  18. 认识hasLayout——IE浏览器css bug的一大罪恶根源
  19. HTTP 基础术语
  20. 基于kcp,consul的service mesh实现

热门文章

  1. Spring 插件安装
  2. Spring Boot中application.properties和application.yml文件
  3. (七)spring+druid多数据源配置
  4. CHI 2015大会:着眼于更加个性化的人机交互
  5. POJ 3522 用不同的排序方式
  6. Java 去掉字符串中的重复数据
  7. 算法设计与分析-Week12
  8. Hexo博客maupassant主题添加Google Adsense广告
  9. SGD与Adam识别MNIST数据集
  10. 做直播能有多赚钱,Python告诉你