2.5.9、注入属性-级联赋值

//部门类
public class Dept {
     private String dname;
     public void setDname(String dname) {
     this.dname = dname;
     } 
}

//员工类
public class Emp {
     private String ename;
     private String gender;
     //员工属于某一个部门，使用对象形式表示
     private Dept dept;
     public void setDept(Dept dept) {
         this.dept = dept;
     }
     public void setEname(String ename) {
         this.ename = ename;
     }
     public void setGender(String gender) {
         this.gender = gender;
     } 
}

（1）第一种写法

<!--级联赋值--> 
<bean id="emp" class="com.atguigu.spring5.bean.Emp">
      <!--设置两个普通属性-->
     <property name="ename" value="lucy"></property>
     <property name="gender" value="女"></property>
          <!--级联赋值-->
        <property name="dept" ref="dept"></property>
</bean> 
<bean id="dept" class="com.atguigu.spring5.bean.Dept">
  <!--外部引入赋值--> 
          <property name="dname" value="财务部"></property>
</bean>

（2）第二种写法

<!--级联赋值--> 
<bean id="emp" class="com.atguigu.spring5.bean.Emp">
   <!--设置两个普通属性-->
   <property name="ename" value="lucy"></property>
   <property name="gender" value="女"></property>
   <!--级联赋值-->
   <property name="dept" ref="dept"></property>
   <property name="dept.dname" value="技术部"></property>
</bean> 
<bean id="dept" class="com.atguigu.spring5.bean.Dept">
         <property name="dname" value="财务部"></property>
</bean>