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                        /通過自動回復機器人學Mybatis---基礎版

按照教程操作到2-6，代碼和教程的一樣，軟件也一樣，出不來，控制臺報錯，意思是說我的sql代碼有問題，可是，我是完全抄的教程啊。我把代碼貼出來。請大佬指點一下。

List<String> paramList = new ArrayList<String>();
?? ??? ??? ?if (command != null && !"".equals(command.trim())) {
?? ??? ??? ??? ?sql.append("and COMMAND=?");
?? ??? ??? ??? ?paramList.add(command);
?? ??? ??? ?}
?? ??? ??? ?if (description != null && !"".equals(description.trim())) {
?? ??? ??? ??? ?sql.append("and DESCRIPTION like '%'?'%'");
?? ??? ??? ??? ?paramList.add(description);
?? ??? ??? ?}

?? ??? ??? ?PreparedStatement statement = conn.prepareStatement(sql.toString());

?? ??? ??? ?for (int i = 0; i < paramList.size(); i++) {
?? ??? ??? ??? ?statement.setString(i + 1, paramList.get(i));
?? ??? ??? ?}

?? ??? ??? ?ResultSet rs = statement.executeQuery();

控制臺報錯如下：

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'COMMAND='??????'and DESCRIPTION like '%''??????''%'' at line 1