如何得到JDBC支持的连接字符串的属性?

得到一个JDBC支持的连接属性的list

import java.sql.*;

public class listAllJDBCParameters
{
 public static void main(String[] args)
 {
 try {
        // Load the driver
        String driverName = "org.gjt.mm.mysql.Driver"; // MySQL MM JDBC driver
        Class.forName(driverName);
     if(args.length>0)driverName=args[0];
        // Get the Driver instance
        String url = "jdbc:mysql://localhost:3306/PCD55";
        Driver driver = DriverManager.getDriver(url);
    
        // Get available properties
        DriverPropertyInfo[] info = driver.getPropertyInfo(url, null);
        System.out.println("属性个数:"+info.length);
        for (int i=0; i<info.length; i++) {
            // Get name of property
            String name = info[i].name;
            System.out.print(name+":");
            // Is property value required?
            boolean isRequired = info[i].required;
           System.out.print(isRequired);
            // Get current value
            String value = info[i].value;
            System.out.print(":"+value);     
            // Get description of property
            String desc = info[i].description;
            System.out.println(":"+desc); 
            // Get possible choices for property; if null, value can be any string
            String[] choices = info[i].choices;
        }
    } catch (ClassNotFoundException e) 
    {
       // Could not find the database driver
    } catch (SQLException e) 
    {
    }
  }   
  }