ssm多表查询xml 始终获取不到Admin

<select id="findAll" resultType="AdminEmp">
        select *from
            emp e
        LEFT JOIN admin a on
        e.ename =a.username

    </select>

    <resultMap id="AdminEmp" type="AdminEmp">
        <!-- 多对多关联 -->
        <association property="Admin" column="id" javaType="Admin" ></association>
        <collection property="Admin" ofType="Admin">
        <id property="id" column="id"/>
            <result property="id" column="id"/>
            <result property="username" column="username"/>
            <result property="password" column="password"/>
            <result property="nickname" column="nickname"/>
        
        </collection>

        
    </resultMap>
    
```xml配置

domin里面代码

public class AdminEmp extends Emp{ private Admin admin; public Admin getAdmin() { return admin; } public void setAdmin( Admin admin) { this.admin = admin; }

} ```运行不报错，就是只能取到emp的属性，无法自动获取或者封装admin，求一个正确的xml

改一下然后有问题再联系

public class AdminEmp extends Emp{
    private List<Admin> listAdmin; 

    public List<Admin> getAdmin() {
        return listAdmin;
    }

    public void setAdmin(List<Admin> listAdmin) {
        this.listAdmin = listAdmin;
    } ;


    
}

<mapper namespace="cn.****.mapper.AdminEmpMapper">

    <!-- List<"AdminEmp"> findAll(); -->    
    <select id="findAll" resultMap="AdminEmp">
        select *from
            emp e
        LEFT JOIN admin a on
        e.ename =a.username

    </select>

    <resultMap id="AdminEmp" type="cn.****.domain.AdminEmp">
        <!-- 多对多关联 -->
        <collection property="admin" ofType="admin">
            <id property="id" column="id"/>
            <result property="username" column="username"/>
            <result property="password" column="password"/>
            <result property="nickname" column="nickname"/>
        
        </collection>
    </resultMap>
    

查询结果[Emp[eid=null, ename=null, sex=null, address=null, tel=null, card=null]]****** 麻烦您了再给看看，谢谢哈