Apache Solr Installation and Usage

Apache Solr is a search platform based on the open source search engine library Lucene, which provides powerful full-text search and real-time analysis capabilities for applications. The following is an introduction to the installation and use of Apache Solr. 1. Download and install: Firstly, from the official Apache website（ http://lucene.apache.org/solr/ ）Download the latest version of Solr compressed package. After decompression, enter the directory after decompression. 2. Start Solr: In the extracted directory, use the command line to enter the bin directory and execute the following command to start Solr: ./solr start This will start a Solr server, which defaults to listening on port 8983. 3. Create a data table (Core): Solr uses a data table (Core) to organize index data. Execute the following command in the bin directory to create a data table: ./solr create -c example This will create a data table called 'example'. The name of the data table can be customized according to actual needs. 4. Add document: Use Solr's API to add, modify, query, and delete documents. Firstly, we need to define the document structure and fields. In the Solr management interface, select the corresponding data table (such as example), click the "Schema" tab on the left, and on the right, you can define the document structure and fields. Then, you can use Solr's API to add documents. The following is an example POST request that adds a document to the data table: POST http://localhost:8983/solr/example/update/json/docs Content-Type: application/json { "id": "1", "title": "Solr Tutorial", "content": "This is a tutorial on how to use Apache Solr." } You can add more fields and content to the above request. 5. Modify the document: The operation of modifying a document is similar to adding, just use the same API interface and modify the corresponding document content. 6. Query documents: Using Solr's API for query operations, the following is an example GET request to query documents in the data table: GET http://localhost:8983/solr/example/select?q=title:Solr In this example, we queried documents with titles containing 'Solr'. The query results will be returned in JSON format. 7. Delete Document: The operation of deleting documents is also carried out through Solr's API. Here is an example POST request that deletes documents with specified conditions: POST http://localhost:8983/solr/example/update?commit=true Content-Type: application/json { "delete": { "query": "title:Solr" } } In this example, we removed all documents with "Solr" in the title. The above is an introduction to the installation and use of Apache Solr, including the process and examples of installing, creating data tables, inserting, modifying, querying, and deleting data. Corresponding operations and adjustments can be made based on actual needs and document structure.