Question

怎样获取 spring 已经注解的bean

Answer 1

不用配置xml,直接java代码实现，参考代码如下：public class GetApplicationContext {private static class ApplicationContextHolder {// 单例变量private static ApplicationContext AC = new FileSystemXmlApplicationContext("classpath:applicationContext.xml");}// 私有化的构造方法，保证外部的类不能通过构造器来实例化。private GetApplicationContext() {}// 获取单例对象实例public static ApplicationContext getInstance() {if (ApplicationContextHolder.AC == null) {ApplicationContextHolder.AC = new FileSystemXmlApplicationContext("classpath:applicationContext.xml");}return ApplicationContextHolder.AC;}}获取所有spring自动装配的bean：//获取spring装配的bean个数GetApplicationContext.getInstance().getBeanDefinitionNames().length;//逐个打印出spring自动装配的bean。根据我的测试，类名第一个字母小写即bean的名字for(int i=0;i<33;i++){System.out.println( GetApplicationContext.getInstance().getBeanDefinitionNames()[i]);}然后通过下面的代码获取到spring注解装配的bean供自己使用：StorageReturnService ossService = (StorageReturnService) GetApplicationContext.getInstance().getBean("storageReturnServiceImpl");怎样获取 spring 已经注解的bean