jsp连接数据库的问题请教

小弟刚开始学习，jsp连接mysql数据库出现问题 ，各位高手帮下忙吧，问题出在哪呢？
代码：
<%@ page contentType="text/html;charset=gb2312" %>
<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%
String driverName = "com.mysql.jdbc.Driver";
String userName = "root";
String userPasswd="root";
String dbName="sss";
String tableName="ssssin";
String url="jdbc:mysql://localhost:3306/"+dbName+"?user="+userName+"&password="+userPasswd;
Class.forName("com.mysql.jdbc.Driver" ).newInstance();
Connection conn=DriverManager.getConnection(url);
Statement stmt=conn.createStatement();
String sql="SELECT*from" +tableName;
ResultSet rs=stmt.executeQuery(sql);
ResultSetMetaData rmeta=rs.getMetaData();
int numColumns=rmeta.getColumnCount();
out.print("id");
out.print("name");
while(rs.next())
{
out.print(rs.getString(1));
out.print(rs.getString(2));
}
out.print("数据库操作成功");
out.print(" <center>");
rs.close();