easyui+mybatis+Mysql,y一对多查询后将关联的数据封装，easyui table中部门和领导怎么获取？

public class Employee {
    private int emp_id;     
    private String emp_name;
    private String sex;     
    private String phone;        
    private String salary;  
    private Date date;
    private String bonus;   
    private Lead lead;
    private Department department;



    @Override
    public String toString() {
        return "Employee [emp_id=" + emp_id + ", emp_name=" + emp_name + ", sex=" + sex + ", phone=" + phone
                + ", salary=" + salary + ",  date=" + date + ", bonus=" + bonus + ", lead=" + lead
                + ", department=" + department + "]";
    }
    public Date getDate() {
        return date;
    }
    public void setDate(Date date) {
        this.date = date;
    }
    public int getEmp_id() {
        return emp_id;
    }
    public void setEmp_id(int emp_id) {
        this.emp_id = emp_id;
    }
    public String getEmp_name() {
        return emp_name;
    }
    public void setEmp_name(String emp_name) {
        this.emp_name = emp_name;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public String getSalary() {
        return salary;
    }
    public void setSalary(String salary) {
        this.salary = salary;
    }

    public String getBonus() {
        return bonus;
    }
    public void setBonus(String bonus) {
        this.bonus = bonus;
    }
    public Lead getLead() {
        return lead;
    }
    public void setLead(Lead lead) {
        this.lead = lead;
    }
    public Department getDepartment() {
        return department;
    }
    public void setDepartment(Department department) {
        this.department = department;
    }

property=“len_name”有问题？mapper中字段或属性一般都是对应字段名称，如果是关联其他对象，一般在调用接口传入类似lead.len_name。

{field:'le_name',title:'领导',width:100,align:'center',formatter:function(value,row,index){
    return row.lead.le_name
}
}