关于springboot整合elasticsearch8.4.3的找不到相关类JsonProvider、JsonProvider的解决方案

环境是springboot是2.3.7，elasticsearch是8.4.3

关于8.4.3的官方文档：https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/8.4/installation.html

问题描述

创建ElasticsearchClient 对象：

一开始报错ClassNotFoundException: jakarta.json.spi.JsonProvider，然后看了下官方文档修改了下jakarta.json-api的版本.解决完成之后报的找不到这个类nested exception is java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/util/JsonProvider。

后来参考了好多博客，最后终于解决了，写下个博客记一下

================================================================

找不到类JsonProvider

项目已经导入：


如果直接导入jakarta.json-api，会出先没有导入成功的结果：还会是默认的1.1.6版本

spring子项目依赖修改父项目依赖问题：必须在下面dependencyManagement中导入正确的依赖

<dependencyManagement>
     <dependencies>
         <dependency>
             <groupId>jakarta.jsongroupId>
             <artifactId>jakarta.json-apiartifactId>
             <version>${jakartajson.version}version>
         dependency>
         <dependency>
             <groupId>org.springframework.bootgroupId>
             <artifactId>spring-boot-dependenciesartifactId>
             <version>${spring-boot.version}version>
             <type>pomtype>
             <scope>importscope>
         dependency>
     dependencies>
 dependencyManagement>
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其中的jakartajson.version在上面声明

<properties>
     <java.version>1.8java.version>
     <elasticsearch.version>8.4.3elasticsearch.version>
     <jackson.version>2.11.3jackson.version>
     <jakartajson.version>2.0.1jakartajson.version>
     <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
     <spring-boot.version>2.3.7.RELEASEspring-boot.version>
 properties>
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刷新，可以看到导入成功

================================================================

找不到类JacksonFeature

是因为

这两个版本号不一致的问题，按照官网推荐，这边在创建springboot项目的时候没有勾选springboot-data-elasticsearch，而在在springboot中默认版本为7.6.2。

解决办法
效仿上面，导入正确的版本8.4.3
properties标签中

<properties>
    <java.version>1.8java.version>
    <elasticsearch.version>8.4.3elasticsearch.version>
    <jackson.version>2.11.3jackson.version>
    <jakartajson.version>2.0.1jakartajson.version>
    <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
    <spring-boot.version>2.3.7.RELEASEspring-boot.version>
properties>
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dependencyManagement标签中

<dependencyManagement>
     <dependencies>
         <dependency>
             <groupId>org.elasticsearch.clientgroupId>
             <artifactId>elasticsearch-rest-clientartifactId>
             <version>${elasticsearch.version}version>
         dependency>
         <dependency>
             <groupId>jakarta.jsongroupId>
             <artifactId>jakarta.json-apiartifactId>
             <version>${jakartajson.version}version>
         dependency>
         <dependency>
             <groupId>org.springframework.bootgroupId>
             <artifactId>spring-boot-dependenciesartifactId>
             <version>${spring-boot.version}version>
             <type>pomtype>
             <scope>importscope>
         dependency>
     dependencies>
 dependencyManagement>
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刷新之后，可以看到

最后

关于项目中的完整pom.xml

<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>4.0.0modelVersion>
    <groupId>com.ruigroupId>
    <artifactId>ElasticSearch_StudyartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>ElasticSearch_Studyname>
    <description>ElasticSearch_Studydescription>

    <properties>
        <java.version>1.8java.version>
        <elasticsearch.version>8.4.3elasticsearch.version>
        <jackson.version>2.11.3jackson.version>
        <jakartajson.version>2.0.1jakartajson.version>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <spring-boot.version>2.3.7.RELEASEspring-boot.version>
    properties>

    <dependencies>

        <dependency>
            <groupId>co.elastic.clientsgroupId>
            <artifactId>elasticsearch-javaartifactId>
            <version>${elasticsearch.version}version>
        dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.coregroupId>
            <artifactId>jackson-databindartifactId>
            <version>${jackson.version}version>
        dependency>


        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starterartifactId>
        dependency>

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintagegroupId>
                    <artifactId>junit-vintage-engineartifactId>
                exclusion>
            exclusions>
        dependency>
    dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.elasticsearch.clientgroupId>
                <artifactId>elasticsearch-rest-clientartifactId>
                <version>${elasticsearch.version}version>
            dependency>
            <dependency>
                <groupId>jakarta.jsongroupId>
                <artifactId>jakarta.json-apiartifactId>
                <version>${jakartajson.version}version>
            dependency>
            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-dependenciesartifactId>
                <version>${spring-boot.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>3.8.1version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
                <version>2.3.7.RELEASEversion>
                <configuration>
                    <mainClass>com.rui.ElasticSearchStudyApplicationmainClass>
                configuration>
                <executions>
                    <execution>
                        <id>repackageid>
                        <goals>
                            <goal>repackagegoal>
                        goals>
                    execution>
                executions>
            plugin>
        plugins>
    build>

project>
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配置类ElasticSearchClientConfig

package com.rui.config;


import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.ElasticsearchTransport;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ElasticSearchClientConfig {
    @Bean
    public ElasticsearchClient elasticsearchClient(){
        RestClient restClient = RestClient.builder(new HttpHost("localhost", 9200)).build();
        ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
        //es 客户端
        ElasticsearchClient client = new ElasticsearchClient(transport);
        return client;

    }
}
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测试类ElasticSearchStudyApplicationTests

package com.rui;

import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch.indices.CreateIndexResponse;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;

@SpringBootTest
class ElasticSearchStudyApplicationTests {
    @Autowired
    @Qualifier("elasticsearchClient")
    private ElasticsearchClient client;

    //测试索引的创建
    @Test
    void test1() throws IOException {
        //写法比RestHighLevelClient更加简洁
        CreateIndexResponse indexResponse = client.indices().create(c -> c.index("user2"));
    }

}
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测试成功

关于具体CRUD的操作，推荐博客：https://blog.csdn.net/yscjhghngh/article/details/123620860