注入内部bean

以员工和部门一对多的关系进行举例：一个部门有多个员工，但一个员工只属于一个部门

部门类

/**
 * 部门类
 */
public class Dept {
    private String deptName;

    public void setDeptName(String deptName) {
        this.deptName = deptName;
    }

    @Override
    public String toString() {
        return "Dept{" +
                "deptName='" + deptName + '\'' +
                '}';
    }
}

员工类

/**
 * 员工类
 */
public class Emp {
    private String empName;
    private String gender;
    private Dept dept;//员工属于某一个部门，使用对象形式表示

    public void setDept(Dept dept) {
        this.dept = dept;
    }

    public void setEmpName(String empName) {
        this.empName = empName;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public void add(){
        System.out.println(empName+":"+gender+":"+dept);
    }
}

在配置文件中进行配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--内部bean-->
    <bean id="emp" class="com.atguigu.spring5.bean.Emp">

        <!--先设置两个普通属性-->
        <property name="empName" value="lucy"></property>
        <property name="gender" value="女"></property>

        <!--对象类型属性-->
        <property name="dept">
            <bean id="dept" class="com.atguigu.spring5.bean.Dept">
                <property name="deptName" value="安保部"></property>
            </bean>
        </property>

    </bean>
</beans>