Mybatis sql注入问题

预编译方式，即PreparedStatement，可以防注入：#{id}

<select id="getBlogById" resultType="Blog"parameterType=”int”>

select id,title,author,content from blog where id=#{id}

</select>

 字符串拼接方式，容易产生注入：${id}

<select id="getBlogById" resultType="Blog"parameterType=”int”>

select id,title,author,content from blog where id=${id}

</select>