JDBC 连接oracle的问题？？？？？？？？？？？？

package util;

import java.sql.Connection;
import java.sql.DriverManager;

public class DBUtil {

public static Connection getConnection() throws Exception{
    Connection conn=null;
    try {
        Class.forName("oracle.jdbc.driver.OracleDriver");
        conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:ORCL","system","123456");
    } catch (Exception e) {
        e.printStackTrace();
        throw e;
    }
    return conn;
}
public static void close(Connection conn){
    if(conn!=null){
        try {
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
public static void main(String[] args) throws Exception {
    System.out.println(getConnection());
}

}

出现java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束
怎么回事啊？？大神们？

参数有问题，我最近没怎么用SQL,但是你那个链接参数少一个吧…链接的是哪个数据库啊