java监控mysql

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

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

        try (Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery("SHOW STATUS LIKE 'Threads_connected'")) {

            if (rs.next()) {
                int connections = rs.getInt("Value");
                System.out.println("Current connections: " + connections);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

public class MySQLPerformanceMonitor {
    public static void main(String[] args) {
        String jmxUrl = "service:jmx:rmi:///jndi/rmi://localhost:9999/jmxrmi";
        try {
            JMXServiceURL url = new JMXServiceURL(jmxUrl);
            JMXConnector jmxConnector = JMXConnectorFactory.connect(url);
            MBeanServerConnection mbsc = jmxConnector.getMBeanServerConnection();

            ObjectName name = new ObjectName("com.mysql:type=Monitor,name=Performance");
            String query = "select * from monitor where name like 'Thread%'";

            for (ObjectName on : mbsc.queryNames(name, null)) {
                System.out.println(mbsc.getAttribute(on, "Value"));
            }

            jmxConnector.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}