spring 动态bean注册
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1、
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.GenericBeanDefinition; import java.util.Date; /**
* @author www.gomepay.com
* @date 2019/11/14
*/
public class GenericBeanDefinitionExample {
public static void main (String[] args) {
DefaultListableBeanFactory context = new DefaultListableBeanFactory(); GenericBeanDefinition gbd = new GenericBeanDefinition();
gbd.setBeanClass(MyBean.class); MutablePropertyValues mpv = new MutablePropertyValues();
mpv.add("date", new Date()); //alternatively we can use:
// gbd.getPropertyValues().addPropertyValue("date", new Date());
gbd.setPropertyValues(mpv); context.registerBeanDefinition("myBeanName", gbd); MyBean bean = context.getBean(MyBean.class);
bean.doSomething();
}
}public class MyBean {
private Date date; public void doSomething () {
System.out.println("from my bean, date: " + date);
} public void setDate (Date date) {
this.date = date;
}
}
输出：from my bean, date: Fri Nov 15 14:16:37 GMT+08:00 2019
2、
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory; /**
* @author www.gomepay.com
* @date 2019/11/15
*/
public class BeanDefinitionBuilderExample {
public static void main (String[] args) {
DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
BeanDefinitionBuilder b =
BeanDefinitionBuilder.rootBeanDefinition(MyBean.class)
.addPropertyValue("str", "myStringValue");
beanFactory.registerBeanDefinition("myBean", b.getBeanDefinition()); MyBean bean = beanFactory.getBean(MyBean.class);
bean.doSomething();
}
}
public class MyBean {
private String str; public void setStr (String str) {
this.str = str;
} public void doSomething () {
System.out.println("from MyBean " + str);
}
}
输出：from MyBean myStringValue
3、
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.GenericBeanDefinition; /**
* @author www.gomepay.com
* @date 2019/11/15
*/
public class InjectingOtherBeans {
public static void main(String[] args) {
DefaultListableBeanFactory context = new DefaultListableBeanFactory();
//define and register MyOtherBean
GenericBeanDefinition beanOtherDef = new GenericBeanDefinition();
beanOtherDef.setBeanClass(MyOtherBean.class);
context.registerBeanDefinition("other", beanOtherDef); //definine and register myBean
GenericBeanDefinition beanDef = new GenericBeanDefinition();
beanDef.setBeanClass(MyBean.class);
MutablePropertyValues mpv = new MutablePropertyValues();
mpv.addPropertyValue("otherBean", context.getBean("other"));
beanDef.setPropertyValues(mpv);
context.registerBeanDefinition("myBean", beanDef); //using MyBean instance
MyBean bean = context.getBean(MyBean.class);
bean.doSomething();
}
}
class MyBean {
private MyOtherBean otherBean; public void setOtherBean (MyOtherBean otherBean) {
this.otherBean = otherBean;
} public void doSomething () {
otherBean.doSomething();
}
}
class MyOtherBean {
public void doSomething () {
System.out.println("from other bean ");
}
}
输出：from other bean
4、
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.support.GenericBeanDefinition; public class MyConfigBean implements BeanFactoryPostProcessor { @Override
public void postProcessBeanFactory (
ConfigurableListableBeanFactory beanFactory)
throws BeansException {
GenericBeanDefinition bd = new GenericBeanDefinition();
bd.setBeanClass(MyBean.class);
bd.getPropertyValues().add("strProp", "my string property");
((DefaultListableBeanFactory) beanFactory).registerBeanDefinition("myBeanName", bd);
}
}
@Configuration
class MyConfig {
@Bean
MyConfigBean myConfigBean () {
return new MyConfigBean();
}
}
class MyBean {
private String strProp; public void setStrProp (String strProp) {
this.strProp = strProp;
} public void doSomething () {
System.out.println("from MyBean: " + strProp);
}
}
public class BeanFactoryPostProcessorExample {
public static void main (String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(MyConfig.class);
MyBean bean = context.getBean(MyBean.class);
bean.doSomething();
}
}
输出：from MyBean: my string property
5、
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.GenericBeanDefinition; public class MyConfigBean implements BeanDefinitionRegistryPostProcessor {
@Override
public void postProcessBeanDefinitionRegistry (BeanDefinitionRegistry registry)
throws BeansException {
GenericBeanDefinition bd = new GenericBeanDefinition();
bd.setBeanClass(MyBean.class);
bd.getPropertyValues().add("strProp", "my string property");
registry.registerBeanDefinition("myBeanName", bd);
}
@Override
public void postProcessBeanFactory (ConfigurableListableBeanFactory beanFactory)
throws BeansException {
//no op
}
}
@Configuration
public class MyConfig {
@Bean
MyConfigBean myConfigBean () {
return new MyConfigBean();
}
}
public class MyBean {
private String strProp;
public void setStrProp (String strProp) {
this.strProp = strProp;
}
public void doSomething () {
System.out.println("from MyBean: " + strProp);
}
}
public class BeanDefinitionRegistryPostProcessorExample {
public static void main (String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(MyConfig.class);
MyBean bean = (MyBean) context.getBean("myBeanName");
bean.doSomething();
}
}
输出：from MyBean: my string property
| 阿里云国内75折 回扣 微信号：monov8 |
| 阿里云国际，腾讯云国际，低至75折。AWS 93折 免费开户实名账号 代冲值 优惠多多 微信号：monov8 飞机：@monov6 |