spring中注册bean(通过代码动态注册)

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[java] view plaincopyprint?

• //将applicationContext转换为ConfigurableApplicationContext   
• ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext) applicationContext;  
•   
• // 获取bean工厂并转换为DefaultListableBeanFactory   
• DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) configurableApplicationContext  
•         .getBeanFactory();  
•   
• // 通过BeanDefinitionBuilder创建bean定义   
• BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder  
•         .genericBeanDefinition(UserService.class);  
• // 设置属性userAcctDAO,此属性引用已经定义的bean:userAcctDAO   
• beanDefinitionBuilder  
•         .addPropertyReference("userAcctDAO", "UserAcctDAO");  
•   
• // 注册bean   
• defaultListableBeanFactory.registerBeanDefinition("sdfds",  
•         beanDefinitionBuilder.getRawBeanDefinition());  
  

                //将applicationContext转换为ConfigurableApplicationContext                ConfigurableApplicationContext configurableApplicationContext = (ConfigurableApplicationContext) applicationContext;                                // 获取bean工厂并转换为DefaultListableBeanFactory                DefaultListableBeanFactory defaultListableBeanFactory = (DefaultListableBeanFactory) configurableApplicationContext                                .getBeanFactory();                                // 通过BeanDefinitionBuilder创建bean定义                BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder                                .genericBeanDefinition(UserService.class);                // 设置属性userAcctDAO,此属性引用已经定义的bean:userAcctDAO                beanDefinitionBuilder                                .addPropertyReference("userAcctDAO", "UserAcctDAO");                                // 注册bean                defaultListableBeanFactory.registerBeanDefinition("sdfds",                                beanDefinitionBuilder.getRawBeanDefinition());User.java

[java] view plaincopyprint?

• public class User {  
•   
•     private String username;  
•     private String password;  
•   
•     public String getUsername() {  
•         return username;  
•     }  
•   
•     public void setUsername(String username) {  
•         this.username = username;  
•     }  
•   
•     public String getPassword() {  
•         return password;  
•     }  
•   
•     public void setPassword(String password) {  
•         this.password = password;  
•     }  
•   
• }  
  

public class User {        private String username;        private String password;        public String getUsername() {                return username;        }        public void setUsername(String username) {                this.username = username;        }        public String getPassword() {                return password;        }        public void setPassword(String password) {                this.password = password;        }}
UserService.java

[java] view plaincopyprint?

• public class UserService {  
•   
•     private User user;  
•       
•       
•     public void test(){  
•         System.out.println(user.getUsername()+"--------------------");  
•     }  
•   
•     public User getUser() {  
•         return user;  
•     }  
•       
•       
•   
•     public void setUser(User user) {  
•         this.user = user;  
•     }  
• }  
  

public class UserService {        private User user;                        public void test(){                System.out.println(user.getUsername()+"--------------------");        }        public User getUser() {                return user;        }                        public void setUser(User user) {                this.user = user;        }}


示例:
BeanFactoryAwareBean.java
[java] view plaincopyprint?

• import org.springframework.beans.BeansException;  
• import org.springframework.beans.factory.BeanFactory;  
• import org.springframework.beans.factory.BeanFactoryAware;  
• import org.springframework.beans.factory.support.BeanDefinitionBuilder;  
• import org.springframework.beans.factory.support.DefaultListableBeanFactory;  
• import org.springframework.context.ApplicationListener;  
• import org.springframework.context.event.ContextRefreshedEvent;  
•   
• public class BeanFactoryAwareBean implements BeanFactoryAware,  
•         ApplicationListener<ContextRefreshedEvent> {  
•     private DefaultListableBeanFactory beanFactory;  
•   
•     public void setBeanFactory(BeanFactory beanFactory) throws BeansException {  
•         System.out.println("setBeanFactory.........................");  
•         this.beanFactory = (DefaultListableBeanFactory) beanFactory;  
•     }  
•   
•     public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {  
•         System.out.println("ContextRefreshed...................");  
•   
•         BeanDefinitionBuilder userBeanDefinitionBuilder = BeanDefinitionBuilder  
•                 .genericBeanDefinition(User.class);  
•         userBeanDefinitionBuilder.addPropertyValue("username", "chinfeng");  
•         userBeanDefinitionBuilder.addPropertyValue("password", "123456");  
•         beanFactory.registerBeanDefinition("user",  
•                 userBeanDefinitionBuilder.getRawBeanDefinition());  
•   
•         BeanDefinitionBuilder usersBeanDefinitionBuilder = BeanDefinitionBuilder  
•                 .genericBeanDefinition(UserService.class);  
•         usersBeanDefinitionBuilder.addPropertyReference("user", "user");  
•         beanFactory.registerBeanDefinition("userService",  
•                 usersBeanDefinitionBuilder.getRawBeanDefinition());  
•     }  
• }  
  

import org.springframework.beans.BeansException;import org.springframework.beans.factory.BeanFactory;import org.springframework.beans.factory.BeanFactoryAware;import org.springframework.beans.factory.support.BeanDefinitionBuilder;import org.springframework.beans.factory.support.DefaultListableBeanFactory;import org.springframework.context.ApplicationListener;import org.springframework.context.event.ContextRefreshedEvent;public class BeanFactoryAwareBean implements BeanFactoryAware,                ApplicationListener<ContextRefreshedEvent> {        private DefaultListableBeanFactory beanFactory;        public void setBeanFactory(BeanFactory beanFactory) throws BeansException {                System.out.println("setBeanFactory.........................");                this.beanFactory = (DefaultListableBeanFactory) beanFactory;        }        public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {                System.out.println("ContextRefreshed...................");                BeanDefinitionBuilder userBeanDefinitionBuilder = BeanDefinitionBuilder                                .genericBeanDefinition(User.class);                userBeanDefinitionBuilder.addPropertyValue("username", "chinfeng");                userBeanDefinitionBuilder.addPropertyValue("password", "123456");                beanFactory.registerBeanDefinition("user",                                userBeanDefinitionBuilder.getRawBeanDefinition());                BeanDefinitionBuilder usersBeanDefinitionBuilder = BeanDefinitionBuilder                                .genericBeanDefinition(UserService.class);                usersBeanDefinitionBuilder.addPropertyReference("user", "user");                beanFactory.registerBeanDefinition("userService",                                usersBeanDefinitionBuilder.getRawBeanDefinition());        }}
applicationContext.xml


[html] view plaincopyprint?

• <?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:p="http://www.springframework.org/schema/p"  
•     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">  
•     <bean id="beanFactoryAwareBean" class="BeanFactoryAwareBean"></bean>  
• </beans>  
  

<?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:p="http://www.springframework.org/schema/p"        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">        <bean id="beanFactoryAwareBean" class="BeanFactoryAwareBean"></bean></beans>
结果:
setBeanFactory.........................
ContextRefreshed...................
chinfeng--------------------