Spring Data elasticsearch整合elasticsearch

Spring Data elasticsearch与elasticsearch版本支持

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简单的使用步骤

1.引入依赖

<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>

2.application.yml配置端口

spring:
  data:
    elasticsearch:
      cluster-name: elasticsearch
      cluster-nodes: 192.168.56.101:9300

3.实体类写入注解，并配置映射字段

分片shards以及备份replicas都可以在Document里面配置

id注解一定是springdata里面的

4.创建索引库以及映射

5.添加索引

这里用到ElasticsearchRepository接口，类似通用mapper

使用：

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根据方法名自定义接口方法

命名合符规范即可自动实现

Keyword	Sample	Elasticsearch Query String
And	findByNameAndPrice	{"bool" : {"must" : [ {"field" : {"name" : "?"}}, {"field" : {"price" : "?"}} ]}}
Or	findByNameOrPrice	{"bool" : {"should" : [ {"field" : {"name" : "?"}}, {"field" : {"price" : "?"}} ]}}
Is	findByName	{"bool" : {"must" : {"field" : {"name" : "?"}}}}
Not	findByNameNot	{"bool" : {"must_not" : {"field" : {"name" : "?"}}}}
Between	findByPriceBetween	{"bool" : {"must" : {"range" : {"price" : {"from" : ?,"to" : ?,"include_lower" : true,"include_upper" : true}}}}}
LessThanEqual	findByPriceLessThan	{"bool" : {"must" : {"range" : {"price" : {"from" : null,"to" : ?,"include_lower" : true,"include_upper" : true}}}}}
GreaterThanEqual	findByPriceGreaterThan	{"bool" : {"must" : {"range" : {"price" : {"from" : ?,"to" : null,"include_lower" : true,"include_upper" : true}}}}}
Before	findByPriceBefore	{"bool" : {"must" : {"range" : {"price" : {"from" : null,"to" : ?,"include_lower" : true,"include_upper" : true}}}}}
After	findByPriceAfter	{"bool" : {"must" : {"range" : {"price" : {"from" : ?,"to" : null,"include_lower" : true,"include_upper" : true}}}}}
Like	findByNameLike	{"bool" : {"must" : {"field" : {"name" : {"query" : "?*","analyze_wildcard" : true}}}}}
StartingWith	findByNameStartingWith	{"bool" : {"must" : {"field" : {"name" : {"query" : "?*","analyze_wildcard" : true}}}}}
EndingWith	findByNameEndingWith	{"bool" : {"must" : {"field" : {"name" : {"query" : "*?","analyze_wildcard" : true}}}}}
Contains/Containing	findByNameContaining	{"bool" : {"must" : {"field" : {"name" : {"query" : "**?**","analyze_wildcard" : true}}}}}
In	findByNameIn(Collection<String>names)	{"bool" : {"must" : {"bool" : {"should" : [ {"field" : {"name" : "?"}}, {"field" : {"name" : "?"}} ]}}}}
NotIn	findByNameNotIn(Collection<String>names)	{"bool" : {"must_not" : {"bool" : {"should" : {"field" : {"name" : "?"}}}}}}
Near	findByStoreNear	Not Supported Yet !
True	findByAvailableTrue	{"bool" : {"must" : {"field" : {"available" : true}}}}
False	findByAvailableFalse	{"bool" : {"must" : {"field" : {"available" : false}}}}
OrderBy	findByAvailableTrueOrderByNameDesc	{"sort" : [{ "name" : {"order" : "desc"} }],"bool" : {"must" : {"field" : {"available" : true}}}}

举例：

public interface ItemRepository extends ElasticsearchRepository<Item,Long> {

    /**
     * 根据价格区间查询
     * @param price1
     * @param price2
     * @return
     */
    List<Item> findByPriceBetween(double price1, double price2);
}

不需要实现类 可以直接查询
分页的话 需要传入一个Pageable的参数，两个变量 page和size

聚合查询或者过滤无法通过spring data elasticsearch的repository实现，需要用到elasticsearch原生查询。
template.queryForPage()或者repository.search()
前者使用两个参数，需要指定类型。后者不需要指定类型

此外queryBuilder还能做排序以及分页
排序

queryBuilder.withSort(SortBuilders.fieldSort("price").order(SortOrder.DESC));

分页
页码从0开始

queryBuilder.withPageable(PageRequest.of(1, 2));

完整代码模板

聚合查询

使用
template来查询

查与取可以参照原生查询的格式与返回结构，可以更好的理解每一步