数据库搜索效果优化的Java技巧经验分享与总结

String query = "SELECT * FROM users WHERE username = ?";
PreparedStatement statement = connection.prepareStatement(query);
statement.setString(1, "john_doe");
ResultSet resultSet = statement.executeQuery();

// 处理结果集
...

String query = "SELECT * FROM users WHERE age > ?";
PreparedStatement statement = connection.prepareStatement(query);
statement.setInt(1, 18);
ResultSet resultSet = statement.executeQuery();

// 处理结果集
...

String query = "SELECT * FROM users LIMIT ?";
PreparedStatement statement = connection.prepareStatement(query);
statement.setInt(1, 10);
ResultSet resultSet = statement.executeQuery();

// 处理结果集
...

// 创建Lucene索引
Analyzer analyzer = new StandardAnalyzer();
IndexWriterConfig config = new IndexWriterConfig(analyzer);
Directory directory = new RAMDirectory();
IndexWriter indexWriter = new IndexWriter(directory, config);

// 添加文档到索引
Document document = new Document();
document.add(new TextField("content", "Java数据库搜索技巧", Field.Store.YES));
indexWriter.addDocument(document);
indexWriter.close();

// 执行搜索操作
String searchString = "数据库搜索";
IndexReader indexReader = DirectoryReader.open(directory);
IndexSearcher indexSearcher = new IndexSearcher(indexReader);
QueryParser queryParser = new QueryParser("content", analyzer);
Query query = queryParser.parse(searchString);
TopDocs topDocs = indexSearcher.search(query, 10);

// 处理搜索结果
...