MyBatis ofType和javaType区别

JavaType和ofType都是用来指定对象类型的，但是JavaType是用来指定pojo中属性的类型，而ofType指定的是 映射到list集合属性中pojo的类型 。

pojo类：

public class User {

     private int id ;

     private String username ;

     private String mobile ;

     privateListposts;

}

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" />

                       

          < 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 >