elasticsearch的java语法
时间: 2023-09-02 13:09:10 浏览: 43
Elasticsearch的Java语法是通过使用客户端接口来与Elasticsearch服务器进行交互。在示例代码中,transportClient是获取访问Elasticsearch服务器的客户端接口。
以下是一些基本的Java语法示例:
1. 使用match_all查询所有文档:
```
QueryBuilder queryBuilder = QueryBuilders.matchAllQuery();
SearchResponse searchResponse = transportClient.prepareSearch("estest")
.setQuery(queryBuilder)
.setSize(3)
.get();
SearchHits searchHits = searchResponse.getHits();
for(SearchHit hit : searchHits) {
System.out.println(hit.getSourceAsString());
}
```
这段代码使用match_all查询所有文档,并打印每个文档的内容。
2. 使用match查询:
```
QueryBuilder queryBuilder2 = QueryBuilders.matchQuery("name", "csdn");
SearchResponse searchResponse2 = transportClient.prepareSearch("estest")
.setQuery(queryBuilder2)
.setSize(4)
.get();
SearchHits searchHits2 = searchResponse2.getHits();
for(SearchHit hit : searchHits2) {
System.out.println(hit.getSourceAsString());
}
```
这段代码使用match查询,通过指定字段名和查询关键词来搜索匹配的文档。
请注意,以上示例代码假设你已经连接到Elasticsearch服务器并创建了一个名为"estest"的索引。如果你对Elasticsearch的基本语法不熟悉,建议先了解一下基本语法。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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