java mysql慢查询监控

import java.sql.*;

public class SlowQueryMonitor {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            String sql = "SELECT * FROM mytable WHERE id > 1000";
            long startTime = System.currentTimeMillis();
            try (Statement stmt = conn.createStatement();
                 ResultSet rs = stmt.executeQuery(sql)) {
                while (rs.next()) {
                    // 处理结果集
                }
            }
            long endTime = System.currentTimeMillis();
            long executionTime = endTime - startTime;
            if (executionTime > 1000) { // 假设慢查询阈值为1秒
                System.out.println("Slow query detected: " + sql + " took " + executionTime + " ms");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}