1、引入依赖
xml
<!-- es工具-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>2、配置es连接信息
yaml
sring:
elasticsearch:
rest:
uris: "http://localhost:9200"3、构建索引
java
@Document(indexName = "test_index_person")
public class TestPerson{
public TestPerson( String personName, Integer personId, String gmtCreate, String gmtModified) {
this.personName = personName;
this.personId = personId;
this.gmtCreate = gmtCreate;
this.gmtModified = gmtModified;
}
public TestPerson() {
}
@Override
public String toString() {
return "TestPerson{" +
"id='" + id + '\'' +
", personName='" + personName + '\'' +
", personId=" + personId +
", gmtCreate=" + gmtCreate +
", gmtModified=" + gmtModified +
'}';
}
@Id
private String id;
@Field(type = FieldType.Text, analyzer = "ik_analyzer",name = "person_name")
private String personName;
@Field(type = FieldType.Integer,name = "person_id")
private Integer personId;
@Field(type = FieldType.Date,name = "gmt_create")
private String gmtCreate;
@Field(type = FieldType.Date,name = "gmt_modified")
private String gmtModified;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPersonName() {
return personName;
}
public void setPersonName(String personName) {
this.personName = personName;
}
public Integer getPersonId() {
return personId;
}
public void setPersonId(Integer personId) {
this.personId = personId;
}
public String getGmtCreate() {
return gmtCreate;
}
public void setGmtCreate(String gmtCreate) {
this.gmtCreate = gmtCreate;
}
public String getGmtModified() {
return gmtModified;
}
public void setGmtModified(String gmtModified) {
this.gmtModified = gmtModified;
}
}4、查询（包含自定义聚合查询）
java
@Autowired
ElasticsearchOperations elasticsearchOperations;
/***
* 自定义 match 查询
*/
@Test
public void test6(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("person_name", "小黑子");
queryBuilder.withQuery(matchQueryBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 自定义 term 查询
*/
@Test
public void test7(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
TermQueryBuilder personId = QueryBuilders.termQuery("person_id", "1");
queryBuilder.withQuery(personId);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 自定义 match_all 查询
*/
@Test
public void test8(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
queryBuilder.withQuery(matchAllQueryBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 自定义 match_phrase 查询
*/
@Test
public void test9(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
MatchPhraseQueryBuilder matchPhraseQueryBuilder = QueryBuilders.matchPhraseQuery("person_name", "小黑子");
queryBuilder.withQuery(matchPhraseQueryBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 范围查询
*/
@Test
public void test10(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("gmt_create");
rangeQuery.gte("2024-01-31T11:00:00");
rangeQuery.lt("2024-07-31T11:00:00");
queryBuilder.withQuery(rangeQuery);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 模糊匹配
*/
@Test
public void test11(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 添加基本分词查询
FuzzyQueryBuilder fuzzyQueryBuilder = QueryBuilders.fuzzyQuery("person_name", "张三");
queryBuilder.withQuery(fuzzyQueryBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 布尔查询 必须匹配(must) 过滤(filter) 至少匹配一个(should)
*/
@Test
public void test12(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 构建布尔查询
BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
//布尔查询下添加must
List<QueryBuilder> must = boolQueryBuilder.must();
TermQueryBuilder personId = QueryBuilders.termQuery("person_id", "1");
must.add(personId);
//布尔查询下添加filter
List<QueryBuilder> filter = boolQueryBuilder.filter();
RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("gmt_create");
rangeQuery.gte("2024-07-31T10:00:00");
filter.add(rangeQuery);
//布尔查询下添加should
List<QueryBuilder> should = boolQueryBuilder.should();
TermQueryBuilder shouldTerm = QueryBuilders.termQuery("person_id", "111");
should.add(shouldTerm);
//布尔查询下添加must_not
List<QueryBuilder> queryBuilders = boolQueryBuilder.mustNot();
TermQueryBuilder mustNotTerm = QueryBuilders.termQuery("person_name", "哈哈哈");
queryBuilders.add(mustNotTerm);
//构建布尔查询语法，准备执行
queryBuilder.withQuery(boolQueryBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 分页
*/
@Test
public void test13(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
// 查询全部
MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
queryBuilder.withQuery(matchAllQueryBuilder);
Pageable pageable = PageRequest.of(0, 10, Sort.by("personId").descending());
queryBuilder.withPageable(pageable);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
}
/***
* 对查询出来的值进行聚合查询 统计每个唯一值的个数
*/
@Test
public void test14(){
// 构建查询条件
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
//查询数据
MatchQueryBuilder matchQuery = QueryBuilders.matchQuery("person_name", "张三");
queryBuilder.withQuery(matchQuery);
//聚合数据
TermsAggregationBuilder termsAggregationBuilder = AggregationBuilders.terms("test_aggs").field("gmt_create");
queryBuilder.addAggregation(termsAggregationBuilder);
SearchHits<TestPerson> searchHits = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
searchHits.forEach(item ->{
System.out.println(item);
});
Aggregations aggregations = searchHits.getAggregations();
// 检查 aggregations 是否为 null
if (aggregations != null) {
// 第二步：通过聚合名称获取特定的聚合结果
Terms testAggs = aggregations.get("test_aggs");
// 检查特定聚合是否存在
if (testAggs != null) {
// 第三步：遍历聚合中的桶（buckets）
for (Terms.Bucket bucket : testAggs.getBuckets()) {
// 获取桶的键（在这个例子中是 gmt_create 的值）
String keyAsString = bucket.getKeyAsString();
// 获取桶中文档的数量
long docCount = bucket.getDocCount();
// 打印或处理每个桶的结果
System.out.println("Key: " + keyAsString + ", DocCount: " + docCount);
}
}
}
}
/***
* 对查询出来的值进行聚合查询 统计每个唯一值的个数 仅仅返回聚合结果
*/
@Test
public void test15(){
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
//仅仅返回聚合结果
queryBuilder.withPageable(PageRequest.of(0,1));
//查询数据
MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("person_name", "张三");
queryBuilder.withQuery(matchQueryBuilder);
//聚合
TermsAggregationBuilder aggregationBuilder = AggregationBuilders.terms("test_aggs").field("gmt_create");
queryBuilder.addAggregation(aggregationBuilder);
//获取聚合信息
SearchHits<TestPerson> search = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
Aggregations aggregations = search.getAggregations();
if (aggregations != null){
Terms terms = aggregations.get("test_aggs");
List<? extends Terms.Bucket> buckets = terms.getBuckets();
buckets.forEach(item ->{
System.out.println("key:"+item.getKeyAsString() +"===="+"doc_count:"+item.getDocCount());
});
}
}
/***
* 多个聚合
*/
@Test
public void test16(){
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
//仅仅返回聚合结果
queryBuilder.withPageable(PageRequest.of(0,1));
TermsAggregationBuilder test_aggs = AggregationBuilders.terms("test_aggs").field("gmt_create");
queryBuilder.addAggregation(test_aggs);
AvgAggregationBuilder test_aggs2 = AggregationBuilders.avg("test_aggs2").field("person_id");
queryBuilder.addAggregation(test_aggs2);
SearchHits<TestPerson> search = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
Aggregations aggregations = search.getAggregations();
if (aggregations != null){
Terms test_aggs1 = aggregations.get("test_aggs");
if (test_aggs != null){
test_aggs1.getBuckets().forEach(item ->{
System.out.println("key:"+ item.getKeyAsString()+"===="+"doc_count:"+item.getDocCount());
});
}
Avg test2_aggs = aggregations.get("test_aggs2");
System.out.println( test2_aggs.getValue());
}
}
/***
* 子聚合 先分组，再计算
*/
@Test
public void test17(){
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
queryBuilder.withPageable(PageRequest.of(0,1));
TermsAggregationBuilder test_aggs = AggregationBuilders.terms("test_aggs").field("gmt_create");
test_aggs.subAggregation(AggregationBuilders.avg("son_aggs_test").field("person_id"));
queryBuilder.addAggregation(test_aggs);
SearchHits<TestPerson> search = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
Aggregations aggregations = search.getAggregations();
Terms testAgges = aggregations.get("test_aggs");
testAgges.getBuckets().forEach(item ->{
Avg aggregations1 = item.getAggregations().get("son_aggs_test");
System.out.println("key:"+item.getKeyAsString()+"--doc_count:"+item.getKeyAsString()+"--son_aggs_test"+aggregations1.getValue());
});
}
/**
* 取聚合最大值
*/
@Test
public void test18(){
NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
queryBuilder.addAggregation(AggregationBuilders.max("test_agg").field("person_id"));
SearchHits<TestPerson> search = elasticsearchOperations.search(queryBuilder.build(), TestPerson.class);
Aggregations aggregations = search.getAggregations();
Max test_agg = aggregations.get("test_agg");
System.out.println(test_agg.getValue());
}