Java uses es query example code

As we all know, elastic search is short for ES, which is a Lucene based search server. It provides a distributed multi-user full-text search engine based on restful web interface. Elasticsearch is developed in Java and released as an open source under the Apache license terms. It is a popular enterprise search engine. Designed for cloud computing, it can achieve real-time search, stable, reliable, fast, easy to install and use.

We build a website or application and add search function, but it is very difficult to complete the creation of search work. We want the search solution to run fast. We want to have a zero configuration and a completely free search mode. We want to simply use JSON to index data through HTTP. We want our search server to be always available. We want to start from one and expand to hundreds. We want real-time search and we want simple multi tenancy, We want to build a cloud solution. Therefore, we use elasticsearch to solve all these problems and more other problems that may arise.

When using ES in Java, you just want to solve the problem that the query speed is not fast enough and the efficiency is not high enough. Querying data from the database alone can no longer meet the current business needs. OK! Now let's talk about how to use es as a magical search server in Java. First, you have to refer to the dependency package of ES. The dependencies are as follows: