spring 内部bean实例

第一步：新建工程  SecondSpring

工程目录结构如下：

第二步：导入相应的jar包

略...

第三步：新建类

InnerBean.java

package com.xuzhiwen.spring2;

public class InnerBean {
    
    private int id;
    private String name;
    
    public void setId(int id) {
        this.id = id;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    @Override
    public String toString() {
        return "InnerBean [id=" + id + ", name=" + name + "]";
    }

    public void inner(){
        System.out.println(this);
        System.out.println("InnerBean.inner()...");
    }
    
}

第四步： 新建类

OutterBean.java

package com.xuzhiwen.spring2;

public class OutterBean {
    private InnerBean innerBean;

    public void setInnerBean(InnerBean innerBean) {
        this.innerBean = innerBean;
    }
    
    
    public OutterBean(InnerBean innerBean) {
        this.innerBean = innerBean;
    }


    public void outter(){
        System.out.println("OutterBean.outter()...");
        innerBean.inner();
    }
}

第五步：新建配置文件

innerbean.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
    
　　
    <bean id="outter" class="com.xuzhiwen.spring2.OutterBean">
　　　　　<!--setter 方式注入-->
        <property name="innerBean">
            <bean class="com.xuzhiwen.spring2.InnerBean">
                <property name="id" value="2" />
                <property name="name" value="test1" />
            </bean>
        </property>
        
　　　　　<!--构造器 方式注入-->　
        <!-- <constructor-arg>
            <bean class="com.xuzhiwen.spring2.InnerBean">
                <property name="id" value="2" />
                <property name="name" value="test1" />
            </bean>
        </constructor-arg> -->
    </bean>
</beans>    

第六步：新建配置文件

common.xml

<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-2.5.xsd">
    
    <import resource="xmlfolder/app1.xml" />
    <import resource="xmlfolder/innerbean.xml" />
</beans>    

第七步：新建测试类

Test.java

package com.xuzhiwen.spring2;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Test {
    public static void main(String[] args) {
        ApplicationContext app = new ClassPathXmlApplicationContext("common.xml");
        OutterBean out = (OutterBean) app.getBean("outter");
        out.outter();
    }
}

第八步：　运行结果如下