Mybatis之collection标签中javaType和ofType属性的区别说明

public class Department {

	private Integer id;
	private String departmentName;
	private List<Employee> emps;
}

public class Employee {

	private Integer id;
	private String lastName;
	private String email;
	private String gender;
}

<select id="getDeptByIdPlus" resultMap="MyDept">
		SELECT d.id did, d.dept_name dept_name,
			e.id eid, e.last_name last_name, e.email email,e.gender gender
		FROM department d
		LEFT JOIN employee e
		ON d.id = e.d_id
		WHERE d.id = 1
</select> 

<resultMap type="bean.Department" id="MyDept">
		<id column="did" property="id"/>
		<result column="dept_name" property="departmentName"/>
		<!-- 
			collection定义关联的集合类型的属性的封装规则:
			property="emps":指定这是哪个集合属性，这里为那个集合属性emps
			ofType:指定集合内封装的JavaBean类型(集合内装的什么)，这里即为Employee类
		 -->
		<collection property="emps" ofType="bean.Employee">
			<!-- 定义集合中元素的封装规则 -->
			<id column="eid" property="id"/>
			<result column="last_name" property="lastName"/>
			<result column="email" property="email"/>
			<result column="gender" property="gender"/>
		</collection>
</resultMap>