[Java] 基于ssm中dao接口@Param注解的用法

public interface PaperDao {
  Paper queryById(long id);
}

<select id="queryById" parameterType="long" resultMap="resultMap1">
  SELECT paper_id,name,number,detail
  FROM paper
  WHERE paper_id=#{id}
</select>

public interface PaperDao {
  Paper queryById(@Param("id") long id，@Param("name") String name);}

<select id="queryById" parameterType="long" resultMap="resultMap1">
  SELECT paper_id,name,number,detail
  FROM paper
  WHERE paper_id=#{id} AND name=#{name}
</select>

public int getUserDetail(@Param("userId") int id);
//这里我们就可以利用#{userId}来获取到id的值 在执行sql语句时候