springboot使用elasticsearch的客户端操作eslaticsearch

一 ES客户端

　　ES提供多种不同的客户端：

　　　　1、TransportClient

　　　　ES提供的传统客户端，官方计划8.0版本删除此客户端。

　　　　2、RestClient

　　　　RestClient是官方推荐使用的，它包括两种：Java Low Level REST Client和 Java High Level REST Client。

　　　　ES在6.0之后提供 Java High Level REST Client，两种客户端官方更推荐使用 Java High Level REST Client，不过当前它还处于完善中，有些功能还没有。

　　　　3 spring-data-elasticsearch

　　　　这个是基于TransportClient开发的，虽然在有些版本还是可以用，但是更新对应版本太慢了

采用 Java High Level REST Client，如果它有不支持的功能，则使用Java Low Level REST Client。

二整合

　　首先是pom.xml

　　注意我这个地方引入的是springbooot2.0.1 版本，首先这么做下去，再升级

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.</modelVersion>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>2.0..RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <groupId>com.cxy</groupId>

    <artifactId>elasticsearch</artifactId>

    <version>0.0.-SNAPSHOT</version>

    <name>elasticsearch</name>

    <description>Demo project for Spring Boot</description>

    <properties>

        <java.version>1.8</java.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.elasticsearch.client</groupId>

            <artifactId>elasticsearch-rest-high-level-client</artifactId>

            <version>6.2.</version>

        </dependency>

        <dependency>

            <groupId>org.elasticsearch</groupId>

            <artifactId>elasticsearch</artifactId>

            <version>6.2.</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>com.alibaba</groupId>

            <artifactId>fastjson</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.commons</groupId>

            <artifactId>commons-io</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.commons</groupId>

            <artifactId>commons-lang3</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

            </plugin>

        </plugins>

    </build>

</project>

yml文件：

server:

  port: ${port:}

spring:

  application:

    name:search-service

  elasticsearch:

    hostlist: ${eshostlist:127.0.0.1:}

es的配置类：

package com.cxy.elasticsearch.config;

import org.apache.http.HttpHost;

import org.elasticsearch.client.RestClient;

import org.elasticsearch.client.RestHighLevelClient;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@Configuration

public class ElasticsearchConfig {

    @Value("${spring.elasticsearch.hostlist}")

    private String hostlist;

    @Bean

    public RestHighLevelClient restHighLevelClient(){

        //解析hostlist配置信息

        String[] split = hostlist.split(",");

        //创建HttpHost数组，其中存放es主机和端口的配置信息

        HttpHost[] httpHostArray = new HttpHost[split.length];

        for(int i=;i<split.length;i++){

            String item = split[i];

            httpHostArray[i] = new HttpHost(item.split(":")[], Integer.parseInt(item.split(":")[]), "http");

        }

        //创建RestHighLevelClient客户端

        return new RestHighLevelClient(RestClient.builder(httpHostArray));

    }

    //项目主要使用RestHighLevelClient，对于低级的客户端暂时不用

    @Bean

    public RestClient restClient(){

        //解析hostlist配置信息

        String[] split = hostlist.split(",");

        //创建HttpHost数组，其中存放es主机和端口的配置信息

        HttpHost[] httpHostArray = new HttpHost[split.length];

        for(int i=;i<split.length;i++){

            String item = split[i];

            httpHostArray[i] = new HttpHost(item.split(":")[], Integer.parseInt(item.split(":")[]), "http");

        }

        return RestClient.builder(httpHostArray).build();

    }

}

然后再看我的controller

package com.cxy.elasticsearch.controller;

import org.elasticsearch.action.DocWriteResponse;

import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;

import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;

import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;

import org.elasticsearch.action.get.GetRequest;

import org.elasticsearch.action.get.GetResponse;

import org.elasticsearch.action.index.IndexRequest;

import org.elasticsearch.action.index.IndexResponse;

import org.elasticsearch.action.support.master.AcknowledgedResponse;

import org.elasticsearch.client.IndicesClient;

import org.elasticsearch.client.RestClient;

import org.elasticsearch.client.RestHighLevelClient;

import org.elasticsearch.common.settings.Settings;

import org.elasticsearch.common.xcontent.XContentType;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Map;

@RestController

public class EsController {

    @Autowired

    RestHighLevelClient client;

    @Autowired

    RestClient restClient;

    @RequestMapping(value = "/createIndex" ,method = RequestMethod.POST)

    public String createIndex(){

        //创建索引请求对象

        CreateIndexRequest createIndexRequest = new CreateIndexRequest("chenxuyou3");

        // 设置参数

        createIndexRequest.settings(Settings.builder().put("number_of_shards","").put("number_of_replicas",""));

        //指定映射

        createIndexRequest.mapping("doc"," {\n" +

                " \t\"properties\": {\n" +

                "            \"studymodel\":{\n" +

                "             \"type\":\"keyword\"\n" +

                "           },\n" +

                "            \"name\":{\n" +

                "             \"type\":\"keyword\"\n" +

                "           },\n" +

                "           \"description\": {\n" +

                "              \"type\": \"text\",\n" +

                "              \"analyzer\":\"ik_max_word\",\n" +

                "              \"search_analyzer\":\"ik_smart\"\n" +

                "           },\n" +

                "           \"pic\":{\n" +

                "             \"type\":\"text\",\n" +

                "             \"index\":false\n" +

                "           }\n" +

                " \t}\n" +

                "}", XContentType.JSON);

        //指定索引操作的客户端

        IndicesClient indices = client.indices();

        //执行创建索引库

        CreateIndexResponse createIndexResponse = null;

        try {

            createIndexResponse = indices.create(createIndexRequest);

        } catch (IOException e) {

            e.printStackTrace();

        }

        boolean acknowledged = createIndexResponse.isAcknowledged();

        //获取返回结果

        System.err.println(acknowledged);

        return "ok";

    }

    @RequestMapping(value = "/deleteIndex",method = RequestMethod.POST)

    public String deleteIndex(){

        DeleteIndexRequest chenxuyou3 = new DeleteIndexRequest("chenxuyou2");

        IndicesClient indices = client.indices();

        AcknowledgedResponse delete =null;

        try {

            delete = indices.delete(chenxuyou3);

        } catch (IOException e) {

            e.printStackTrace();

        }

        boolean acknowledged = delete.isAcknowledged();

        System.err.println(acknowledged);

        return "";

    }

    @RequestMapping(value = "/addDoc",method = RequestMethod.POST)

    public String addDoc(){

//文档内容

        //准备json数据

        Map<String, Object> jsonMap = new HashMap<>();

        jsonMap.put("name", "spring cloud实战");

        jsonMap.put("description", "本课程主要从四个章节进行讲解： 1.微服务架构入门 2.spring cloud 基础入门 3.实战Spring Boot 4.注册中心eureka。");

        jsonMap.put("studymodel", "");

        SimpleDateFormat dateFormat =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        jsonMap.put("timestamp", dateFormat.format(new Date()));

        jsonMap.put("price", 5.6f);

        //创建索引创建对象

        //带有type的方法已经废弃

       // IndexRequest indexRequest = new IndexRequest("chenxuyou3","doc");

        IndexRequest indexRequest = new IndexRequest("chenxuyou3");

        //文档内容

        indexRequest.source(jsonMap);

        //通过client进行http的请求

        IndexResponse indexResponse = null;

        try {

            indexResponse = client.index(indexRequest);

        } catch (IOException e) {

            e.printStackTrace();

        }

        DocWriteResponse.Result result = indexResponse.getResult();

        System.err.println(result);

        return "ok";

    }

    @RequestMapping(value = "/selectDoc",method = RequestMethod.GET)

    public String selectDoc(){

        //查询请求对象

       // GetRequest getRequest = new GetRequest("chenxuyou2","doc","8tyV-m4B7rvW_ZY4LvVU");

        GetRequest getRequest = new GetRequest("chenxuyou3","doc","8tyV-m4B7rvW_ZY4LvVU");

        GetResponse getResponse = null;

        try {

            getResponse = client.get(getRequest);

        } catch (IOException e) {

            e.printStackTrace();

        }

        //得到文档的内容

        Map<String, Object> sourceAsMap = getResponse.getSourceAsMap();

        System.out.println(sourceAsMap);

        return "ok" ;

    }

}

然后启动项目可以看到很清晰的运行

调用 localhost:8085/createIndex

可以看到成功了，后面的也就自然可以操作了。

三问题一：

修改springboot的版本为2.1.8，环境：我使用的es版本是6.2.1 版本：

出现问题：

{

    "timestamp": "2019-12-15T04:46:53.518+0000",

    "status": ,

    "error": "Internal Server Error",

    "message": "org.elasticsearch.client.Request.<init>(Ljava/lang/String;Ljava/lang/String;)V",

    "path": "/createIndex"

}

控制台：

java.lang.NoSuchMethodError: org.elasticsearch.client.Request.<init>(Ljava/lang/String;Ljava/lang/String;)V

    at org.elasticsearch.client.RestClient.performRequest(RestClient.java:) ~[elasticsearch-rest-client-6.4..jar:6.2.]

    at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:) ~[elasticsearch-rest-high-level-client-6.2..jar:6.2.]

    at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:) ~[elasticsearch-rest-high-level-client-6.2..jar:6.2.]

    at org.elasticsearch.client.IndicesClient.create(IndicesClient.java:) ~[elasticsearch-rest-high-level-client-6.2..jar:6.2.]

    at com.cxy.elasticsearch.controller.EsController.createIndex(EsController.java:) ~[classes/:na]

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:) ~[na:1.8.0_191]

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:) ~[na:1.8.0_191]

    at java.lang.reflect.Method.invoke(Method.java:) ~[na:1.8.0_191]

    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:) ~[spring-webmvc-5.1..RELEASE.jar:5.1..RELEASE]

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:) ~[tomcat-embed-websocket-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:) ~[spring-web-5.1..RELEASE.jar:5.1..RELEASE]

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:) ~[tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:) [na:1.8.0_191]

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:) [na:1.8.0_191]

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:) [tomcat-embed-core-9.0..jar:9.0.]

    at java.lang.Thread.run(Thread.java:) [na:1.8.0_191]

java.lang.NoSuchMethodError: org.elasticsearch.client.Request.<init>(Ljava/lang/String;Ljava/lang/String;)V

这句话的具体意思是这样的，就是没有这个方法，Request对象init的时候创建使用（String，String）后面v是值得意思

可以很清楚，就是升级时候，这个方法没了

    /** @deprecated */

    @Deprecated

    public Response performRequest(String method, String endpoint, Map<String, String> params, Header... headers) throws IOException {

        Request request = new Request(method, endpoint);

        addParameters(request, params);

        addHeaders(request, headers);

        return this.performRequest(request);

    }

由于这个方法已经废弃了，所以在重新去找的时候，版本升级，springboot就没有去找这个类，

所以就报错了

四问题二

出现了上叙问题之后，我想到了解决方法，就是将client得版本升级为最新得，7.23

然后还有就是他那个type得移除，构造方法里面不能有type

最终由于跟我es版本不一致，

Search problem, contains unrecognized parameter: [typed_keys]

报包含错误得字段，我在删除得时候明没什么都没有

然后将版本进行升级：升级到6.6.1就成功了

springboot使用elasticsearch的客户端操作eslaticsearch的更多相关文章

ElasticSearch相关概念与客户端操作
一.Elasticsearch概述 Elasticsearch是面向文档(document oriented)的,这意味着它可以存储整个对象或文档(document).然而它不仅仅是存储,还会索引(i ...
springboot整合es客户端操作elasticsearch（五）
springboot整合es客户端操作elasticsearch的总结: 客户端可以进行可以对所有文档进行查询,就是不加任何条件: SearchRequest searchRequest = new ...
springboot整合es客户端操作elasticsearch（二）
在上章节中整合elasticsearch客户端出现版本问题进行了处理,这章来进行springboot整合得操作环境:elaticsearch6.2.1,springboot 2.1.8 客户端版本采 ...
使用Java客户端操作elasticsearch（二）
承接上文,使用Java客户端操作elasticsearch,本文主要介绍常见的配置和Sniffer(集群探测) 的使用. 常见的配置前面已介绍过,RestClientBuilder支持同时提供一 ...
SpringBoot整合ElasticSearch实现多版本的兼容
前言在上一篇学习SpringBoot中,整合了Mybatis.Druid和PageHelper并实现了多数据源的操作.本篇主要是介绍和使用目前最火的搜索引擎ElastiSearch,并和Spring ...
ElasticSearch+Kibana 索引操作( 附源码)
一前言 ElasticiSearch 简介 ElasticSearch是一个基于Lucene的搜索服务器.它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口.Elastics ...
ElasticSearch+Kibana 索引操作
ElasticSearch+Kibana 索引操作一前言 ElasticiSearch 简介 ElasticSearch是一个基于Lucene的搜索服务器.它提供了一个分布式多用户能力的全文搜索引 ...
全文检索-Elasticsearch （四） elasticsearch.net 客户端
本篇摘自elasticsearch.net search入门使用指南中文版(翻译) 原文:http://edu.dmeiyang.com/book/nestusing.html elasticsear ...
springboot集成elasticsearch
在基础阶段学习ES一般是首先是安装ES后借助 Kibana 来进行CURD 了解ES的使用: 在进阶阶段可以需要学习ES的底层原理,如何通过Version来实现乐观锁保证ES不出问题等核心原理: 第 ...

随机推荐

计数dp做题笔记
YCJS 3924 饼干 Description 给定一个长度为\(n\)的序列,序列每个元素的取值为\([1,x]\),现在给定\(q\)个区间,求在所有取值方案中,区间最小值的最大值的期望是多少? ...
http method
get: 获取资源get方法用来请求访问已被URL识别的资源 post: 传输实体主体POST方法用来传输实体的主体 put: 传输文件PUT方法用来传输文件. head: 获取报文首部head方法与 ...
Java进阶知识15 Spring的基础配置详解
1.SSH各个的职责 Struts2:是web框架(管理jsp.action.actionform等).Hibernate:是ORM框架,处于持久层.Spring:是一个容器框架,用于配置bean,并 ...
Centos 7 搭建蓝鲸V4.1.16稳定社区版
在本地用VMware模拟了三台主机准备至少3台 CentOS 7 以上操作系统的机器,保证三台虚拟机都可以上网最低配置:2核4G(我用的是这个) 建议配置: 4核12G 以上 192.168.16 ...
neo4j︱与python结合的py2neo使用教程
—- 目前的几篇相关:—– neo4j︱图数据库基本概念.操作罗列与整理(一) neo4j︱Cypher 查询语言简单案例(二) neo4j︱Cypher完整案例csv导入.关系联通.高级查询(三) ...
爬虫之requests库的使用
get基本请求响应对象的属性: # 获取响应对象中的内容是str格式 text # 获取响应对象中的内容是二进制格式的 content # 获取响应状态码 status_code # 获取响应头信息 ...
Python datetime库计算两个时间点之间的分钟（秒、天）数
计算两个时间点之间的分钟数 import datetime def minNums(startTime, endTime): '''计算两个时间点之间的分钟数''' # 处理格式,加上秒位 start ...
phpstorm配置了git后Terminal 不能使用显示：git' 不是内部或外部命令，也不是可运行的程序
问题:在phpstorm上配置好git后,将代码拉了下来 ,但是命令行无法使用显示如图解决方法:①找到安装git的位置,然后在该目录的子目录下分别找到git-core.bin 两个目录,我的安装在了 ...
中间件 | Nginx实现动静分离
Nginx动静分离基本概述动静分离,通过中间件将动静分离和静态请求进行分离: 通过中间件将动态请求和静态请求分离,可以建上不必要的请求消耗,同事能减少请求的延时. 通过中间件将动态请求和静态请求分离 ...
C realloc
https://baike.baidu.com/item/realloc/659993?fr=aladdin 也就是说:原地址后面有连续可以空间可以满足需要,则追加在后面,否则开辟新空间,并拷贝数据

springboot使用elasticsearch的客户端操作eslaticsearch

springboot使用elasticsearch的客户端操作eslaticsearch的更多相关文章

随机推荐

热门专题