mybatis List对象

MyBatis is a popular Java-based persistence framework that provides support for mapping Java objects to SQL statements. When it comes to handling lists of objects in MyBatis, there are a few options you can consider.

1. Using the `foreach` element: MyBatis provides a `foreach` element that allows you to iterate over a collection and generate dynamic SQL statements. You can use it to handle lists of objects by specifying a collection parameter and then referencing the collection within the SQL statement. Here's an example:

<select id="getUsersByIds" parameterType="java.util.List" resultType="User">
  SELECT * FROM users WHERE id IN
  <foreach item="item" index="index" collection="list" open="(" separator="," close=")">
    #{item}
  </foreach>
</select>

In this example, `list` is the parameter name representing the list of object IDs.

2. Using annotations: MyBatis also supports annotations for mapping SQL statements directly to Java methods. You can use the `@Param` annotation to pass a list of objects as a parameter. Here's an example:

@Select("SELECT * FROM users WHERE id IN (#{ids})")
List<User> getUsersByIds(@Param("ids") List<Integer> ids);

In this example, the `ids` parameter is a list of object IDs.

These are just a couple of examples of how you can handle lists of objects in MyBatis. You can choose the approach that best suits your needs and project requirements.