实现办法/手动模式
-
Java 注解配置元信息
- @Autowired
- @Resource
- @Inject(可选)
- @Bean
@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;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.beans.factory.xml.XmlReaderContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import javax.annotation.Resource;
import javax.inject.Inject;
public class DemoApplication {
private Holder holder;
private Holder holder1;
private Holder holder2;
@Autowired
public void init(Holder holder){
this.holder=holder;
}
@Resource
public void init1(Holder holder){
this.holder1=holder;
}
@Inject
public void init2(Holder holder){
this.holder2=holder;
}
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
原文: https://rumenz.com/rumenbiji/Spring-function-injection.html