Spring单一类型依赖查找Bean

单一类型依赖查找接口 - BeanFactory

BeanFacotry是spring中比较原始的Factory,BeanFactory是个Factory，也就是IOC容器或对象工厂

根据Bean名称查找
- getBean(String)
- 覆盖默认参数getBean(String,Object)
根据Bean类型查找
- Bean实时查找
  - getBean(Class)
  - 覆盖默认参数 getBean(Class,Object)
- Bean延时查找
  - getBeanProvider(Class)
  - getBeanProvider(ResolvableType)
根据Bean名称和Bean类型查找
- getBean(String,Class)

实体类Rumenz.java

package com.rumenz;
public class Rumenz {private Integer id;private String name;@Overridepublic String toString() {return "Rumenz{" +"id=" + id +", name='" + 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;}
}

根据Bean名称查找

package com.rumenz;public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();ac.register(DemoApplication.class);ac.refresh();//根据名称查找Rumenz rumenz= (Rumenz) ac.getBean("rumenz");System.out.println(rumenz);ac.close();}@Beanpublic Rumenz rumenz(){Rumenz rumenz = new Rumenz();rumenz.setId(123);rumenz.setName("入门小站");return rumenz;}
}

根据类型查找

package com.rumenz;import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();ac.register(DemoApplication.class);ac.refresh();//根据类型查找Rumenz rumenz = ac.getBean(Rumenz.class);System.out.println(rumenz);ac.close();}@Beanpublic Rumenz rumenz(){Rumenz rumenz = new Rumenz();rumenz.setId(123);rumenz.setName("入门小站");return rumenz;}}

Bean延时查找 getBeanProvider

package com.rumenz;
import java.util.Iterator;public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();ac.register(DemoApplication.class);ConfigurableListableBeanFactory beanFactory = ac.getBeanFactory();ac.refresh();ObjectProvider<Rumenz> obj = beanFactory.getBeanProvider(Rumenz.class);Iterator<Rumenz> iterator = obj.iterator();while (iterator.hasNext()){System.out.println(iterator.next());}ac.close();}@Beanpublic Rumenz rumenz(){Rumenz rumenz = new Rumenz();rumenz.setId(123);rumenz.setName("入门小站");return rumenz;}}

根据Bean名称和Bean类型查找


package com.rumenz;public class DemoApplication {public static void main(String[] args) {AnnotationConfigApplicationContext ac=new AnnotationConfigApplicationContext();ac.register(DemoApplication.class);ac.refresh();//根据Bean名称和Bean类型查找Rumenz rumenz = ac.getBean("rumenz",Rumenz.class);System.out.println(rumenz);ac.close();}@Beanpublic Rumenz rumenz(){Rumenz rumenz = new Rumenz();rumenz.setId(123);rumenz.setName("入门小站");return rumenz;}}

原文: https://rumenz.com/rumenbiji/spring-get-single-bean.html

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Spring单一类型依赖查找Bean

单一类型依赖查找接口 - BeanFactory

根据Bean名称查找

根据类型查找

Bean延时查找 getBeanProvider

根据Bean名称和Bean类型查找

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