Java 连接到wamp服务器时在NetBeans中获取错误

错误是：

java.lang.ClassCastException:java.math.BigInteger不能转换为java.lang.Long

Th eurl应该类似于“jdbc:mysql://localhost:3306/sonoo“，”根“，”根“）；

import java.sql.*;

public class conn {
    
    public Connection c;
    public Statement s;
 
    public conn(){
        try{
            Class.forName("com.mysql.jdbc.Driver");
            c=DriverManager.getConnection("jdbc:mysql:///project1","root","123456");
            s = c.createStatement();
            
        
        }catch(Exception e) {
            e.printStackTrace();
        }
    }
}