Spring Boot如何动态创建Bean示例代码

前言

本文主要给大家介绍了关于Spring Boot动态创建Bean的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

SpringBoot测试版本：1.3.4.RELEASE

参考代码如下：

package com.spring.configuration;  import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.support.BeanDefinitionBuilder; import org.springframework.beans.factory.support.DefaultListableBeanFactory; import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression; import org.springframework.context.ApplicationContext; import org.springframework.context.ConfigurableApplicationContext; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.jdbc.core.JdbcTemplate;  @Configuration  @ConditionalOnExpression("${my.configuration.enabled}") public class DynamicConfiguration {  @Autowired  private ApplicationContext applicationContext;      @Bean  public Runnable dynamicConfiguration() throws Exception  {   ConfigurableApplicationContext context = (ConfigurableApplicationContext)applicationContext;   DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory)context.getBeanFactory();      BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder.rootBeanDefinition(UserService.class);      beanDefinitionBuilder.addPropertyValue("name", "myConfigure");   beanDefinitionBuilder.addPropertyValue("jdbcTemplate", applicationContext.getBean(JdbcTemplate.class));         beanFactory.reGISterBeanDefinition("userService", beanDefinitionBuilder.getBeanDefinition());   return null;  } } class UserService {  private String name;  private JdbcTemplate jdbcTemplate;  public String getName()  {   return name;  }  public void setName(String name)  {   this.name = name;  }  public JdbcTemplate getJdbcTemplate()  {   return jdbcTemplate;  }  public void setJdbcTemplate(JdbcTemplate jdbcTemplate)  {   this.jdbcTemplate = jdbcTemplate;  } }