报错如上：

相关程序代码

//gradle.build
buildscript {
 ext {
  springBootVersion = '2.0.0.RELEASE'
 }
 // 自定义 Elasticsearch 的版本
 //ext['elasticsearch.version'] = '5.2.2'
 
 repositories {
  //mavenCentral()
  maven{
   url 'http://maven.aliyun.com/nexus/content/groups/public/'
     }
 }
 dependencies {
  classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
 }
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
repositories {
 //mavenCentral()
 maven{
  url 'http://maven.aliyun.com/nexus/content/groups/public/'
 }
}

dependencies {
 compile('org.springframework.boot:spring-boot-starter-web')
 // 添加  Spring Data Elasticsearch 的依赖
 compile('org.springframework.boot:spring-boot-starter-data-elasticsearch')
 // 添加  JNA 的依赖
 compile('net.java.dev.jna:jna:4.3.0')
 testCompile('org.springframework.boot:spring-boot-starter-test')
}

//repository
package com.example.demo.blog.repository.es;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import com.example.demo.blog.domain.EsBlog;
/**
 * EsBlog Repository 接口
 * @author lightning
 *
 */
public interface EsBlogRepository extends ElasticsearchRepository<EsBlog, String> {
 Page<EsBlog> findDistinctEsBlogByTitleContainingOrSummaryContainingOrContentContaining
 (String title,String summary,String content,Pageable pageable);
}

//test
package com.example.demo.blog.repository.es;
import static org.assertj.core.api.Assertions.assertThat;
import org.hamcrest.core.Is;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.test.context.junit4.SpringRunner;
import com.example.demo.blog.domain.EsBlog;
@RunWith(SpringRunner.class)
@SpringBootTest
public class EsBlogRespositoryTest {
 
 @Autowired
 private EsBlogRepository esBlogRepository;
 
 @Before
 public void initRepositoryData() {
  esBlogRepository.deleteAll();
  esBlogRepository.save(new EsBlog("静夜思","李白","床前看月光，疑是地上霜。抬头望山月，低头思故乡。"));
  esBlogRepository.save(new EsBlog("静夜思","李白","床前看月光，疑是地上霜。抬头望山月，低头思故乡。"));
  esBlogRepository.save(new EsBlog("静夜思","李白","床前看月光，疑是地上霜。抬头望山月，低头思故乡。"));
 }
 @Test
 public void testfindDistinctEsBlogByTitleContainingOrSummaryContainingOrContentContaining() {
  Pageable pageable=new PageRequest(0, 20);
  String title="思";
  String summary="相思";
  String content="相思";
  Page<EsBlog> page=esBlogRepository.findDistinctEsBlogByTitleContainingOrSummaryContainingOrContentContaining(title, summary, content, pageable);
  assertThat(page.getTotalElements()).isEqualTo(1);
  
  System.out.println("***********");
  for(EsBlog blog:page.getContent()) {
   System.out.println(blog);
  }
  System.out.println("***********");
 }
}