jdbc连接mysql问题

Java code:
import java.sql.*;

public class DBTester1 {
public static void main(String[] args) throws Exception {
Connection con;
Statement stmt;
ResultSet rs;

Class.forName("com.mysql.jdbc.Driver");
DriverManager.registerDriver(new com.mysql.jdbc.Driver());
String dbUrl =
"jdbc:mysql://localhost:3306/STOREDB?useUnicode=true&characterEncoding=GB2312";
String dbUser = "dbuser";
String dbPwd ="1234";
con = java.sql.DriverManager.getConnection(dbUrl,dbUser,dbPwd);
stmt= con.createStatement();

stmt.executeUpdate("insert into CUSTOMERS (NAME,AGE,ADDRESS)"
+"VALUES('小王',20,'上海')");
rs = stmt.executeQuery("SELECT ID,NAME,AGE,ADDRESS from CUSTOEMRS");
while(rs.next())
{
long id = rs.getLong(1);
String name = rs.getString(2);
int age = rs.getInt(3);
String address = rs.getString(4);

System.out.println("id="+id+",name="+name+",age="+age+",address="+address);
}
stmt.executeUpdate("delete from CUSTOMERS where name='小王'");
rs.close();
stmt.close();
con.close();