1.搭建
1.1.下载地址
Elasticsearch：https://www.elastic.co/cn/downloads/elasticsearch
Kibana：https://www.elastic.co/cn/downloads/kibana
1.2.具体过程
下载安装包：访问上述链接，下载适合你操作系统的Elasticsearch和Kibana安装包。
1.3.安装Elasticsearch
解压下载的安装包。
进入解压后的目录。
如果是Windows系统，直接进入bin目录，双击elasticsearch.bat文件。看到命令行中打印日志中出现“started”，说明Elasticsearch启动完成。
linux中进入bin目录，然后执行./elasticsearch命令
详情参见linux系统安装elasticsearch教程_linux安装es-CSDN博客
1.4.配置Elasticsearch集群
修改elasticsearch.yml文件，设置集群名称、节点名称、网络主机和种子节点等。
对于集群中的其他节点，重复上述步骤，并确保每个节点的配置文件中都有所有节点的IP地址。
启动其他节点：在每个节点上重复上述安装步骤，并启动Elasticsearch服务。
检查集群健康状态：通过访问Elasticsearch的API或使用Kibana界面，查看集群的健康状态。
请注意，这只是一个基本的搭建指南。在生产环境中，你可能需要更详细的配置和优化。此外，确保你的网络设置允许Elasticsearch集群通信所需的端口。
1.5.注意点
1.不能用root权限启动，需要新建用户，如：
更改文件夹的用户为user1 chown -R user1:user1 /local
修改user1对文件夹的权限 chmod 777 /local
2.获取账号密码
elasticsearch的bin目录下，输入命令行：elasticsearch-reset-password -u elastic
2.springboot中集成ES8
2.1.依赖
<dependency>
<groupId>co.elastic.clients</groupId>
<artifactId>elasticsearch-java</artifactId>
<version>8.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.3</version>
</dependency>
<dependency>
<groupId>jakarta.json</groupId>
<artifactId>jakarta.json-api</artifactId>
<version>2.0.1</version>
</dependency>2.2.elasticsearch.properties
spring.elasticsearch.uris = IP:port
spring.elasticsearch.username = 用户名
spring.elasticsearch.password = 密码2.3.ElasticSearchConfig
@Configuration
public class ElasticSearchConfig {
@Value("${spring.elasticsearch.uris}")
private String hosts;
@Value("${spring.elasticsearch.username}")
private String userName;
@Value("${spring.elasticsearch.password}")
private String passWord;
@Bean(name="elasticsearchClient")
public ElasticsearchClient elasticsearchClient(){
HttpHost[] httpHosts = toHttpHost();
final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(
AuthScope.ANY, new UsernamePasswordCredentials(userName, passWord));
RestClientBuilder builder = RestClient.builder(httpHosts);
builder.setRequestConfigCallback(
new RestClientBuilder.RequestConfigCallback() {
@Override
public RequestConfig.Builder customizeRequestConfig(
RequestConfig.Builder requestConfigBuilder) {
return requestConfigBuilder.setSocketTimeout(60000).setConnectTimeout(5000);
}
});
builder.setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
@Override
public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpAsyncClientBuilder) {
return httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
}
});
RestClient restClient = builder.build();
ElasticsearchTransport transport = new RestClientTransport(restClient,new JacksonJsonpMapper());
return new ElasticsearchClient(transport);
}
private HttpHost[] toHttpHost() {
if (!StringUtils.hasLength(hosts)) {
throw new RuntimeException("invalid elasticsearch configuration. elasticsearch.hosts不能为空！");
}
// 多个IP逗号隔开
String[] hostArray = hosts.split(",");
HttpHost[] httpHosts = new HttpHost[hostArray.length];
HttpHost httpHost;
for (int i = 0; i < hostArray.length; i++) {
String[] strings = hostArray[i].split(":");
httpHost = new HttpHost(strings[0], Integer.parseInt(strings[1]), "http");
httpHosts[i] = httpHost;
}
return httpHosts;
}
}2.4.通用类
2.4.1.枚举类，ES实体类注解
@Target({ElemantType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface ElasticSearchDocument {
String index() default "";
int shards() default 0;
int replicas() default 0;
}2.4.2.查询实体类
@Data
public class EsQueryDTO {
private String indexName;//索引名称
private String field;//关键字属性
private String word;//关键字值
private List<String> words;//关键字值数组
private Integer from;//起始行
private Integer index;//当前页
private Integer size;//分页条数
private String order;//排序字段
private String orderType;//排序方式 asc/desc
private String dateField;//时间字段
private String startTime;//时间范围-开始时间
private String endTime;//时间范围-开始时间
public String getOrderType() {
if (StringUtils.isBlank(orderType)) {
orderType = SortOrder.Desc.name();
}
return orderType;
}
public Integer getSize() {
return size == 0 ? 30 : size;
}
public Integer getFrom() {
return getIndex() != 0 ? ((getIndex() - 1) * getSize()) : 0;
}
public Integer getIndex() {
return null == index ? 0 : index;
}
public String getStartTime(int offset) {
if (StringUtils.isBlank(startTime)) {
startTime = DateUtil.format(DateUtil.offsetDay(new Date(), offset), "yyyy-MM-dd 00:00:00");
return String.valueOf(DateUtil.parse(startTime, "yyyy-MM-dd 00:00:00").getTime());
}
return startTime;
}
public String getEndTime() {
if (StringUtils.isBlank(endTime)) {
endTime = String.valueOf(System.currentTimeMillis());
}
return endTime;
}
}2.4.3.查询工具类
@Component
public class ElasticClientUtils<T> {
/**
* @param
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字查询
* @date 2022/4/2 17:15
*/
public List<T> queryByFiled(ElasticsearchClient client, EsQueryDTO dto, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName())
.query(q -> q.term(t -> t
.field(dto.getField())
.value(dto.getWord())
)).sort(sorts),
HashMap.class);
return getResult(target, result, search);
}
/**
* @param
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字查询，基于游标查询scroll
* @date 2022/4/2 17:15
*/
public List<T> queryByFileds(ElasticsearchClient client, EsQueryDTO dto, List<Query> queries, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
getFieldValues(dto, queries);
//使用scroll深度分页查询
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName()).query(q -> q.bool(b -> b.must(queries))).size(5000).scroll(t -> t.time("5s"))
.sort(sorts),
HashMap.class);
StringBuffer scrollId = new StringBuffer(search.scrollId());
//循环查询，直到查不到数据
do {
getResult(target, result, search);
StringBuffer finalScrollId = scrollId;
search = client.scroll(s -> s.scrollId(finalScrollId.toString()).scroll(t -> t.time("5s")), HashMap.class);
scrollId = new StringBuffer(search.scrollId());
} while (!search.hits().hits().isEmpty());
//getResult(target, result, search)
return result;
}
/**
* @param
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字分页查询
* @date 2022/4/2 17:15
*/
public List<T> queryByFiledWithPage(ElasticsearchClient client, EsQueryDTO dto, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName())
.query(q -> q.term(t -> t
.field(dto.getField())
.value(dto.getWord())
)).sort(sorts).from(dto.getFrom()).size(dto.getSize()),
HashMap.class);
return getResult(target, result, search);
}
private List<T> getResult(Class<T> target, List<T> result, SearchResponse<HashMap> search) {
List<Hit<HashMap>> hits = search.hits().hits();
Iterator<Hit<HashMap>> iterator = hits.iterator();
while (iterator.hasNext()) {
Hit<HashMap> decodeBeanHit = iterator.next();
Map<String, Object> docMap = decodeBeanHit.source();
docMap.put("id", decodeBeanHit.id());
String json = JSON.toJSONString(docMap);
T obj = JSON.parseObject(json, target);
result.add(obj);
}
return result;
}
/**
* @param
* @param client
* @param dto
* @return long
* @author liuch
* @description 根据关键字查询总条数
* @date 2022/4/2 17:15
*/
public static long queryCountByFiled(ElasticsearchClient client, EsQueryDTO dto) throws Exception {
CountResponse count = client.count(c -> c.index(dto.getIndexName()).query(q -> q.term(t -> t
.field(dto.getField())
.value(dto.getWord())
)));
long total = count.count();
return total;
}
/**
* @param
* @param client
* @param dto
* @return long
* @author liuch
* @description 根据关键字查询总条数-复合查询
* @date 2022/4/2 17:15
*/
public static long queryCountByFileds(ElasticsearchClient client, List<Query> queries, EsQueryDTO dto) throws Exception {
getFieldValues(dto, queries);
CountResponse count = client.count(c -> c.index(dto.getIndexName()).query(q -> q.bool(b -> b.must(queries))));
long total = count.count();
return total;
}
/**
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字分页查询- 复合查询 must
* @date 2022/4/2 17:15
*/
public List<T> queryMustByFiledsWithPage(ElasticsearchClient client, EsQueryDTO dto, List<Query> queries, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s
.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName())
.query(q -> q.bool(b -> b.must(queries)))
.sort(sorts).from(dto.getFrom()).size(dto.getSize()),
HashMap.class);
return getResult(target, result, search);
}
/**
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字分页查询- 复合查询 must 过滤
* @date 2022/4/2 17:15
*/
public List<T> queryMustByFiledsWithPage(ElasticsearchClient client, EsQueryDTO dto, List<Query> queries, List<Query> filters, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s
.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName())
.query(q -> q.bool(b -> b.must(queries).filter(filters)))
.sort(sorts).from(dto.getFrom()).size(dto.getSize()),
HashMap.class);
return getResult(target, result, search);
}
/**
* @param client
* @param dto
* @param target
* @return java.util.List<T>
* @author liuch
* @description 根据关键字分页查询- 复合查询 should
* @date 2022/4/2 17:15
*/
public List<T> queryShouldByFiledsWithPage(ElasticsearchClient client, EsQueryDTO dto, List<Query> queries, Class<T> target) throws Exception {
List<T> result = new ArrayList<>();
List<SortOptions> sorts = new ArrayList<>();
if (StringUtils.isNotBlank(dto.getOrder())) {
SortOptions sortOptions = SortOptions.of(s -> s
.field(f -> f.field(dto.getOrder()).order(SortOrder.valueOf(dto.getOrderType()))));
sorts.add(sortOptions);
}
SearchResponse<HashMap> search = client.search(s -> s
.index(dto.getIndexName())
.query(q -> q.bool(b -> b.should(queries)))
.sort(sorts).from(dto.getFrom()).size(dto.getSize()),
HashMap.class);
return getResult(target, result, search);
}
/**
* 构件复合查询条件
*
* @param dto
* @param queries
*/
private static void getFieldValues(EsQueryDTO dto, List<Query> queries) {
List<FieldValue> fieldValues = new ArrayList<>();
//根据关键字列表构件复合查询的值
dto.getWords().stream().forEach(word -> fieldValues.add(FieldValue.of(word)));
//查询条件列表
queries.add(Query.of(q -> q.terms(t -> t.field(dto.getField()).terms(v -> v.value(fieldValues)))));
}
/**
* @param
* @param client
* @param dto
* @param target
* @return java.lang.Object
* @author liuch
* @description 根据文档id查询
* @date 2022/4/2 17:16
*/
public Object queryByDocumentId(ElasticsearchClient client, EsQueryDTO dto, Class<T> target) throws Exception {
GetResponse<HashMap> getResponse = client.get(s -> s
.index(dto.getIndexName()).id(dto.getWord()),
HashMap.class);
getResponse.source();
Map<String, Object> docMap = getResponse.source();
String json = JSON.toJSONString(docMap);
T obj = JSON.parseObject(json, target);
return obj;
}
}2.4.4.基础操作接口
/**
* 基础操作---接口
*/
public interface IElasticSearchIRepository<T, V> {
int delete(V id);
int update(T entity);
T getById(V id);
List<T> getAll();
long count();
PageInfo<T> getListByPage(int pageIndex, int pageSize);
/**
* 新增一个文档
*
* @param entity 实体类
* @return
*/
IndexResponse createByFluentDSL(T entity);
/**
* 新增一个文档
*
* @param entity 实体类
* @return
*/
IndexResponse createByBuilderPattern(T entity);
/**
* 批量增加文档
*
* @param list 对象集合
* @return 批量操作的结果
*/
BulkResponse bulkCreate(List<T> list);
/**
* 根据文档id查找文档，返回类型是ObjectNode
*
* @param id 文档id
* @return ObjectNode类型的查找结果
*/
ObjectNode getObjectNodeById(V id);
/**
* 批量删除文档
*
* @param docIds 要删除的文档id集合
* @return
* @throws Exception
*/
BulkResponse bulkDeleteByIds(List<V> docIds);
/**
* 根据文档id删除文档
*
* @param idxName 索引名
* @param docId 文档id
* @return Object类型的查找结果
* @throws Exception
*/
Boolean deleteById(String idxName, String docId) throws IOException;
/**
* 新建索引，指定索引名称
*
*/
Boolean createIndex();
/**
* 创建索引，指定索引名称和setting和mapping
*
* @param settingFn - 索引参数
* @param mappingFn - 索引结构
*/
Boolean createIndex(Function<IndexSettings.Builder, ObjectBuilder<IndexSettings>> settingFn,
Function<TypeMapping.Builder, ObjectBuilder<TypeMapping>> mappingFn);
/**
* 删除索引
* @throws IOException
*/
Boolean deleteIndex();
/**
* 修改索引字段信息 <br/>
* 字段可以新增，已有的字段只能修改字段的 search_analyzer 属性。
*
* @param propertyMap - 索引字段，每个字段都有自己的property
* @throws IOException
*/
Boolean updateIndexProperty(HashMap<String, Property> propertyMap);
/**
* 查询索引列表
*
* @return
* @throws IOException
*/
GetIndexResponse getIndexList();
/**
* 查询索引详情
*
* @return
* @throws IOException
*/
GetIndexResponse getIndexDetail();
/**
* 检查指定名称的索引是否存在
*
* @return - true：存在
* @throws IOException
*/
boolean indexExists();
}2.4.5.基础操作接口实现类
public abstract class ElasticSearchIRepository<T,V> implements IElasticSearchIRepository<T,V> {
@Autowired(required =false)
@Qualifier("elasticsearchClient")
private ElasticsearchClient elasticsearchClient;
protected ElasticSearchDocument getEntityProperties() {
Class<T> cls = getEntityClass();
ElasticSearchDocument esDoc = cls.getAnnotation(ElasticSearchDocument .calss);
return esDoc;
}
/**设置索引全局配置*/
protected abstract Function<IndexSettings.builder, ObjectBuilder<IndexSettings>> getIndexSettings();
/**手动设置映射（不手动设置会自动创建映射，同时在插入时若手动映射时没有的字段也会自动创建）*/
protected abstract Function<TypeMapping.builder, ObjectBuilder<TypeMapping>> getIndexMappings();
protected abstract Class<T> getEntityClass();
@Override
public int update(T entity) {
try {
ElasticSearchDocument doc = getEntityProperties();
UpdateRequest updateRequest = new UpdateRequest.Builder()
.index(doc.index())
.id(entity.getId().toString())
.doc(entity)
.build();
UpdateResponse updateResponse = elasticsearchClient.update(updateRequest, entity.getClass());
return updateResponse != null && StringUtils.isNotEmpty(updateResponse.id()) ? 1 : 0;
}
catch (IOException e) {
log.error(e);
}
return 0;
}
@Override
public PageInfo<T> getListByPage(int pageIndex, int pageSize) {
List<T> list = new ArrayList<>();
try {
ElasticSearchDocument doc = getEntityProperties();
ElasticClientUtils elasticClientUtils = new ElasticClientUtils();
EsQueryDTO dto = new EsQueryDTO();
dto.setIndex(paeIndex);
dto.setSize(pageSize);
dto.setIndexName(doc.index());
list = elasticClientUtils.queryPage(elasticsearchClient, dto, getEntityClass());
return new PageInde<T>(pageIndex, pageSize, (long)list.size(), list);
}
catch (IOException e) {
log.error(e);
}
return new PageInde<T>(pageIndex, pageSize, 0L, list);
}
@Override
public int delete(V id) {
try {
ElasticSearchDocument doc = getEntityProperties();
DeleteResponse delete = elasticsearchClient.delete(d -> d
.index(doc.index())
.id(id.toString()));
return delete.forcedRefresh() ? 1 : 0;
}
catch (IOException e) {
log.error(e);
}
return 0;
}
@Override
public List<T> getAll() {
try {
ElasticSearchDocument doc = getEntityProperties();
ElasticClientUtils elasticClientUtils = new ElasticClientUtils();
EsQueryDTO dto = new EsQueryDTO();
dto.setIndexName(doc.index());
return elasticClientUtils.queryAll(elasticsearchClient, dto, getEntityClass());
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public long count() {
try {
ElasticSearchDocument doc = getEntityProperties();
EsQueryDTO dto = new EsQueryDTO();
dto.setIndexName(doc.index());
return ElasticClientUtils.queryCountByFiled(elasticsearchClient, dto);
}
catch (IOException e) {
log.error(e);
}
return 0;
}
@Override
public IndexResponse createByFluentDSL(T entity) {
try {
ElasticSearchDocument doc = getEntityProperties();
IndexResponse response = elasticsearchClient.index(index -> idx
.index(doc.index())
.id(entity.getId().toString())
.document(entity));
return response;
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public IndexResponse createByBuilderPattern(T entity) {
try {
ElasticSearchDocument doc = getEntityProperties();
IndexRequest.Builder<Object> indexReqBuilder = new IndexRequest.Builder<>();
indexReqBuilder.index(doc.index());
indexReqBuilder.id(entity.getId().toString());
indexReqBuilder.document(entity);
return elasticsearchClient.index(indexReqBuilder.build());
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public BulkResponse bulkCreate(List<T> documents) {
try {
ElasticSearchDocument doc = getEntityProperties();
BulkRequest.Builder br = new BulkRequest.Builder();
documents.stream()
.forEach(esDocument -> br
.operations(op -> op
.index(idx -> idx
.index(doc.index())
.id(esDocument.getId().toString())
.document(esDocument))));
return elasticsearchClient.bulk(br.build());
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public T getById(V id) {
try {
ElasticSearchDocument doc = getEntityProperties();
GetResponse<Object> response = elasticsearchClient.get(g -> g
.index(doc.index())
.id(id.toString()),
Object.class);
return response.found() ? FastJsonUtil.fromJson(response.source().toString(), getEntityClass()) : null;
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public ObjectNode getObjectNodeById(V id) {
try {
ElasticSearchDocument doc = getEntityProperties();
GetResponse<ObjectNode> response = elasticsearchClient.get(g -> g
.index(doc.index())
.id(id.toString()),
ObjectNode.class);
return response.found() ? response.source() : null;
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public BulkResponse bulkDeleteByIds(List<V> docIds) {
try {
ElasticSearchDocument doc = getEntityProperties();
BulkRequest.Builder br = new BulkRequest.Builder();
// 将每一个对象都放入builder中
docIds.stream().forEach(id -> br
.operations(op -> op
.delete(d -> d
.index(doc.index())
.id(id.toString()))));
return elasticsearchClient.bulk(br.build());
}
catch (IOException e) {
log.error(e);
}
return null;
}
/**自动创建映射*/
@Override
public Boolean createIndex() {
try {
ElasticSearchDocument doc = getEntityProperties();
CreateIndexResponse response = elasticsearchClient.indices().create(c -> c.index(doc.index()));
log.info("createIndex方法，acknowledged={}", response.acknowledged());
return response.acknowledged();
}
catch (IOException e) {
log.error(e);
}
return false;
}
/**手动创建映射*/
@Override
public Boolean createIndex(Function<IndexSettings.Builder, ObjectBuilder<IndexSettings>> settingFn,
Function<TypeMapping.Builder, ObjectBuilder<TypeMapping>> mappingFn) {
try {
ElasticSearchDocument doc = getEntityProperties();
CreateIndexResponse response = elasticsearchClient
.indices()
.create(c -> c
.index(doc.index())
.settings(settingFn)
.mappings(mappingFn)
);
log.info("createIndex方法，acknowledged={}", response.acknowledged());
return response.acknowledged();
}
catch (IOException e) {
log.error(e);
}
return false;
}
@Override
public Boolean deleteIndex() {
try {
ElasticSearchDocument doc = getEntityProperties();
DeleteIndexResponse response = elasticsearchClient.indices().delete(c -> c.index(doc.index()));
log.info("deleteIndex方法，acknowledged={}", response.acknowledged());
return response.acknowledged();
}
catch (IOException e) {
log.error(e);
}
return false;
}
@Override
public Boolean updateIndexProperty(HashMap<String, Property> propertyMap) {
try {
ElasticSearchDocument doc = getEntityProperties();
PutMappingResponse response = elasticsearchClient.indices()
.putMapping(typeMappingBuilder ->
typeMappingBuilder
.index(doc.index())
.properties(propertyMap)
);
log.info("updateIndexMapping方法，acknowledged={}", response.acknowledged());
return response.acknowledged();
}
catch (IOException e) {
log.error(e);
}
return false;
}
@Override
public GetIndexResponse getIndexList() {
try {
ElasticSearchDocument doc = getEntityProperties();
//使用 * 或者 _all都可以
GetIndexResponse response = elasticsearchClient.indices().get(builder -> builder.index("_all"));
log.info("getIndexList方法，response.result()={}", response.result().toString());
return response;
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public GetIndexResponse getIndexDetail() {
try {
ElasticSearchDocument doc = getEntityProperties();
GetIndexResponse response = elasticsearchClient.indices().get(builder -> builder.index(doc.index()));
log.info("getIndexDetail方法，response.result()={}", response.result().toString());
return response;
}
catch (IOException e) {
log.error(e);
}
return null;
}
@Override
public boolean indexExists() {
try {
ElasticSearchDocument doc = getEntityProperties();
return elasticsearchClient.indices().exists(b -> b.index(doc.index())).value();
}
catch (IOException e) {
log.error(e);
}
return null;
}
}2.5.业务
2.5.1.接口
pulbic interface testRepo extends IElasticSearchIRepository<TestESDO, Long> {
}2.5.2. 实现类
@component
pulbic calss testRepo extends ElasticSearchIRepository<TestESDO, Long> implements testRepo{
/**设置索引全局配置*/
@Override
protected Function<IndexSettings.builder, ObjectBuilder<IndexSettings>> getIndexSettings() {
return builder -> builder.numberOfShards("3").numberOfReplicas("1");
}
/**手动设置映射（不手动设置会自动创建映射，同时在插入时若手动映射时没有的字段也会自动创建）*/
@Override
protected Function<TypeMapping.builder, ObjectBuilder<TypeMapping>> getIndexMappings() {
return builder -> {
HashMap<String, Property> propertiesMap = new HashMap<>();
propertiesMap.put("id", new Property.Builder().Long_(new LongNumberProperty.Builder().build()).build());
return builder.properties(propertiesMap);
}
}
@Override
protected Class<T> getEntityClass() {
return TestESDO.clas;
}
}2.5.3. 实体类
@Data
@ElasticSearchCocument(index="test")
public class TestESDO {
private Long id;
}2.5.4. 常见查询方法
1.使用MultiMatch可以多字段，如果想要把搜索词当成一个整体来匹配查询还需要增加TextQueryType.Phrase，如
//must复合查询
List<Query> queries = new ArrayLict<>();
MultiMatchQuery multiMatchQuery = new MultiMatchQuery.Builder()
.query("搜索词")
.type(TextQueryType.Phrase)
.fields("字段1", "字段2")
.build();
Query query = new Query.Builder()
.multiMatch(multiMatchQuery).build();
queries.add(multiMatchQuery);2.使用TermsQuery进行数组过滤，如对某个字段[1,2,3,4]进行过滤，要求只有搜索词中包含这些数字就进行匹配，如4,5或者1,2,3或者1，代码如下
//过滤
List<Query> filters = new ArrayLict<>();
List<FieldValue> fieldValueList = new ArrayList<>();
fieldValueList.add(new FieldValue.Builder().longValue(1).buld());
TermsQuery termsQuery = new TermsQuery .Builder()
.field("字段1")
.terms(new TermsQueryField.Builder().value(fieldValueList).build())
.build();
Query filter = new Query.Builder()
.terms(termsQuery).build();
filters.add(filter);3.更多查询参见：ElasticSearch使用教程、设计到实战-CSDN博客
