java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/

出现这个异常原因可能很多：

1.编码问题

2.没有加载类驱动：换一种数据库的连接方式，就忘了这个：Class.forName(driverclass);

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class JdbcUtil {
    private static String driverclass;
    private static String url;
    private static String user;
    private static String password;
    static{
            try{
                ClassLoader cl=JdbcUtil.class.getClassLoader();

                InputStream in=cl.getResourceAsStream("dbbcfg.properties");
                Properties props=new Properties();
                props.load(in);

                driverclass=props.getProperty("driverClass");
                url=props.getProperty("url");
                user=props.getProperty("user");
                password=props.getProperty("password");


                in.close();
            }catch (Exception e){
                e.printStackTrace();
            }
            try {
                Class.forName(driverclass);
            }catch (ClassNotFoundException e){
                e.printStackTrace();
            }
    }
    public static Connection getConnection(){
        try {
            Connection conn = DriverManager.getConnection(url,user,password);
            return conn;
        } catch (Exception e) {
            throw new RuntimeException("链接数据库的url或用户名密码错误,请检查您的配置文件");
        }
    }
    public static void release(ResultSet rs,Statement stmt,Connection conn){
        if(rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            rs = null;
        }
        if(stmt!=null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            stmt = null;
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
            conn = null;
        }
    }
    public static void main(String[] args){
        System.out.println("Test connection");
        try{
            Connection conn=JdbcUtil.getConnection();
            System.out.println(conn);

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

    }
}