Spring 自动装配

" class="reference-link">

一、新建类

Singer.java

public class Singer {
    private String name;
    private String sex;
    public void setName(String name) {
        this.name = name;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    @Override
    public String toString() {
        return "Singer{" +
                "name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                '}';
    }
}

Song.java

public class Song {
    private String songName;
    private Singer singer;
    public void setSongName(String songName) {
        this.songName = songName;
    }
    public void setSinger(Singer singer) {
        this.singer = singer;
    }
    @Override
    public String toString() {
        return "Song{" +
                "songName='" + songName + '\'' +
                ", singer=" + singer +
                '}';
    }
}

二、编写配置文件

在配置文件中配置对象创建并进行注入

bean9.xml

<?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">
    <bean id="singer" class="com.health.IOC.I_xml自动装配.bean.Singer">
        <property name="name" value="王力宏"/>
        <property name="sex" value="男"/>
    </bean>
    <!--autowire有两个属性:
        byName:根据属性名称注入,注入的bean的id值和类属性名称一样
        byType:根据属性类型注入-->
    <bean id="song" class="com.health.IOC.I_xml自动装配.bean.Song" autowire="byName">
        <property name="songName" value="需要人陪"></property>
    </bean>
</beans>

三、测试

testI.java

public class TestI {
    public static void main(String[] args) {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("com/health/IOC/I_xml自动装配/bean9.xml");
        Song song = context.getBean("song", Song.class);
        System.out.println(song);
    }
}