MySQL的连接

public static void main(String[] args) {
   String userName="root";
   String userPasswd="123";
   String dbName="gvoice";
   //表名
   String tableName="user";
   //联结字符串
   String url="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPasswd;
   try
   {
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    Connection connection=DriverManager.getConnection(url);
    Statement statement = connection.createStatement();
    String sql="SELECT * FROM "+tableName;
    ResultSet rs = statement.executeQuery(sql); 
    while(rs.next())
    {
     System.out.println(rs.getString("name"));
     System.out.println(rs.getString("pass"));
    }
   }
   catch(Exception e)
   {
    e.printStackTrace();
   }
  

}