ElasticSearch开启了x-pack插件添加账号密码功能后，Java案例连接ElasticSearch

   因为spring data现在新的整合的jar包是支持elasticSearch的账号密码配置的，所以如果我们的ElasticSearch设置了账号密码，一般首选用spring data elasticsearch 的jar包 而且spring data简化配置

但是需要注意springdata-elasticsearch的版本，有一些版本是依赖 HighRestClient的jar包

  下面是进行springdata-elasticsearch整合到test项目里，尝试连接测试是否行通

 首先导入在pom里分别导入ElasticSearch server，spring data elasticsearch的jar包

	org.elasticsearch
	elasticsearch
	7.8.1



     org.springframework.boot
     spring-boot-starter-data-elasticsearch
 

 然后在配置文件配置elasticsearch的节点名，ip地址，账号和密码

                                  

 

 切记端口不要搞错，首先ElasticSearch有两个端口的，可以在启动ElasticSearch的时候发现

9300是tcp协议端口，9200是http端口，！！！

结果是无法创建repository实例，一直看下去是无法创建highRestClient

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'requestMappingHandlerAdapter' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Unsatisfied dependency expressed through method 'requestMappingHandlerAdapter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ESTeacherRepository': Cannot resolve reference to bean 'elasticsearchTemplate' while setting bean property 'elasticsearchOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'elasticsearchTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/elasticsearch/ElasticsearchDataConfiguration$RestClientConfiguration.class]: Unsatisfied dependency expressed through method 'elasticsearchTemplate' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'elasticsearchRestHighLevelClient' defined in class path resource [org/springframework/boot/autoconfigure/elasticsearch/rest/RestClientConfigurations$RestHighLevelClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'elasticsearchRestHighLevelClient' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/action/admin/indices/analyze/AnalyzeRequest
Related cause: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'requestMappingHandlerAdapter' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Unsatisfied dependency expressed through method 'requestMappingHandlerAdapter' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcConversionService' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.format.support.FormattingConversionService]: Factory method 'mvcConversionService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ESTeacherRepository': Cannot resolve reference to bean 'elasticsearchTemplate' while setting bean property 'elasticsearchOperations'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'elasticsearchTemplate' defined in class path resource [org/springframework/boot/autoconfigure/data/elasticsearch/ElasticsearchDataConfiguration$RestClientConfiguration.class]: Unsatisfied dependency expressed through method 'elasticsearchTemplate' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'elasticsearchRestHighLevelClient' defined in class path resource [org/springframework/boot/autoconfigure/elasticsearch/rest/RestClientConfigurations$RestHighLevelClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.RestHighLevelClient]: Factory method 'elasticsearchRestHighLevelClient' threw exception; nested exception is java.lang.NoClassDefFoundError: org/elasticsearch/action/admin/indices/analyze/AnalyzeRequest
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798)
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:539)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1338)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1177)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:882)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:126)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
	at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
	... 45 more

 

 

瞬间懂了，这个版本的springdata ElasticSearch依赖HighRestClient那么就要在pom导入对应的jar包

                  

至于为什么要加入restclient的jar包是因为

然后去官网查了一下

We released a low-level REST client in 2016, which is based on the well known Apache HTTP client and it allows to communicate with an Elasticsearch cluster in any version using HTTP. On top of that we released the high-level REST client which is based on the low-level client but takes care of request marshalling and response un-marshalling.

HighRestClient是依赖于restClient，但是没有我现在用的7.8的版本，那意思就是我必须要自己加入restClient的依赖

 

最好跟elasticsearch的版本一致，避免不必要的错误

@org.junit.Test
	public void addTeacherByRepository() throws IOException {

		    Teacher teacher = new Teacher(1,"刘老师",23,"男");
			esTeacherRepository.save(teacher);
			 
		}

 

搞定！