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ofType和javaType的區別(Mybatis)

JavaType和ofType都是用來指定物件型別的,但是JavaType是用來指定pojo中屬性的型別,而ofType指定的是對映到list集合屬性中pojo的型別。
pojo類:
 

publicclass User {
    privateint id;
    privateString username;
    privateString mobile;
    privateList<Post>posts;
}

user.xml:

<resultMap type="User" id="resultUserMap">
         <result property="id" javaType="int" column="user_id" />
         <result property="username" javaType="string" column="username" />
         <result property="mobile"  column="mobile" />
                        <!--javatype指定的是user物件的屬性的型別(例如id,posts),而oftype指定的是對映到list集合屬性中pojo的型別(本例指的是post型別)-->
         <collection property="posts"  ofType="com.spenglu.Post"  javaType="java.util.ArrayList" column="userid">
             <id property="id" column="post_id" javaType="int" jdbcType="INTEGER"/>   
            <result property="title" column="title" javaType="string" jdbcType="VARCHAR"/>
            <result property="content" column="content" javaType="string" jdbcType="VARCHAR"/>
         </collection>
    </resultMap>