实现办法/手动模式

  • Java 注解配置元信息

    • @Autowired 只依照byType 注入,由Spring提供
    • @Resource @Resource默认按byName主动注入，也提供依照byType 注入
    • @Inject(可选)
@Autowired 只依照byType 注入,由Spring提供
@Resource 默认按byName主动注入，也提供依照byType 注入,由JDK提供
// @Inject 须要依赖<dependency>            <groupId>javax.inject</groupId>            <artifactId>javax.inject</artifactId>            <version>1</version></dependency>

实体类Holder.java

package com.rumenz;public class Holder {    private Rumenz rumenz;    public Holder(Rumenz rumenz) {        this.rumenz = rumenz;    }    public Rumenz getRumenz() {        return rumenz;    }    public void setRumenz(Rumenz rumenz) {        this.rumenz = rumenz;    }}

实体类Rumenz.java

package com.rumenz;public class Rumenz {    private Integer id;    private String name;    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

配置文件Beans.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"       xmlns:util="http://www.springframework.org/schema/util"       xsi:schemaLocation="        http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">    <bean id="rumenz" class="com.rumenz.Rumenz">        <property name="id" value="123"/>        <property name="name" value="入门小站"/>    </bean></beans>

调用

package com.rumenz;public class DemoApplication {    @Autowired    private Holder holder;    @Resource    private Holder holder1;    @Inject    private Holder holder2;    public static void main(String[] args) {        AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();        XmlBeanDefinitionReader xr=new XmlBeanDefinitionReader(ac);        xr.loadBeanDefinitions("Beans.xml");        ac.register(DemoApplication.class);        ac.refresh();        DemoApplication bean = ac.getBean(DemoApplication.class);        System.out.println(bean.holder.getRumenz().getName());        System.out.println(bean.holder1.getRumenz().getName());        System.out.println(bean.holder2.getRumenz().getName());        ac.close();    }    @Bean    public Holder holder(Rumenz rumenz){        return new Holder(rumenz);    }}

输入

入门小站入门小站入门小站