spring-210724-06--IOC容器--Bean管理XML方式-注入内部bean&级联赋值

spring-210724-06–IOC容器–Bean管理XML方式-注入内部bean&级联赋值

• Dept.java
• Emp.java
• beantest21072403.xml（注入内部bean）
• beantest21072403.xml（级联赋值）
• TestBean21072403.java

---

Dept.java

package com.bgy.spring.bean;

// 部门
public class Dept {
    private String dname;

    public void setDname(String dname) {
        this.dname = dname;
    }

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

---

Emp.java

package com.bgy.spring.bean;

// 员工
public class Emp {
    private String ename;
    private String gender;
    private Dept dept;

    public void setEname(String ename) {
        this.ename = ename;
    }

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

    public Dept getDept() {
        return dept;
    }

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

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

---

beantest21072403.xml（注入内部bean）

<?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">

    <!--
        测试注入内部bean
    -->
    <!--内部bean-->
    <bean id="emp" class="com.bgy.spring.bean.Emp">
        <!--设置两个普通属性-->
        <property name="ename" value="lucy"></property>
        <property name="gender" value="女"></property>
        
        <!--设置对象类型属性-->
        <property name="dept">
            <bean id="dept" class="com.bgy.spring.bean.Dept">
                <property name="dname" value="安保部"></property>
            </bean>
        </property>
    </bean>
</beans>

---

beantest21072403.xml（级联赋值）

<?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">

    <!--
        测试级联赋值01
    -->
    <bean id="emp" class="com.bgy.spring.bean.Emp">
        <!--设置两个普通属性-->
        <property name="ename" value="bgy"></property>
        <property name="gender" value="男"></property>
        <!-- 级联赋值 -->
        <property name="dept" ref="dept"></property>
    </bean>
    <bean id="dept" class="com.bgy.spring.bean.Dept">
        <property name="dname" value="人事部"></property>
    </bean>

    <!--
        测试级联赋值02
        这种方式需要在Emp中添加get方法
    -->
    <bean id="emp02" class="com.bgy.spring.bean.Emp">
        <!--设置两个普通属性-->
        <property name="ename" value="tom"></property>
        <property name="gender" value="男"></property>
        <!-- 级联赋值 -->
        <property name="dept" ref="dept"></property>
        <property name="dept.dname" value="开发部"></property>
    </bean>

</beans>

---

TestBean21072403.java

import com.bgy.spring.bean.Dept;
import com.bgy.spring.bean.Emp;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestBean21072403 {

    /**
     * 测试注入内部bean
     */
    @Test
    public void test(){
        // 1. 加载Spring配置文件
        ApplicationContext context = new ClassPathXmlApplicationContext("beantest21072403.xml");

        // 2. 获取配置文件创建的对象
        Emp emp = context.getBean("emp", Emp.class);

        emp.test();
    }

    /**
     * 测试级联赋值01
     */
    @Test
    public void test02(){
        // 1. 加载Spring配置文件
        ApplicationContext context = new ClassPathXmlApplicationContext("beantest21072403_02.xml");

        // 2. 获取配置文件创建的对象
        Emp emp = context.getBean("emp", Emp.class);

        emp.test();
    }

    /**
     * 测试级联赋值02
     */
    @Test
    public void test03(){
        // 1. 加载Spring配置文件
        ApplicationContext context = new ClassPathXmlApplicationContext("beantest21072403_02.xml");

        // 2. 获取配置文件创建的对象
        Emp emp = context.getBean("emp02", Emp.class);

        emp.test();
    }
}