在非web项目获取一般为
ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml"); ac.getBean("beanId");编写工具类：
在Spring Boot可以扫描的包下 import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; /** * 普通类调用Spring bean对象： * 说明： * 1、此类需要放到App.java同包或者子包下才能被扫描，否则失效。 * @author Administrator */ @Component public class SpringUtil implements ApplicationContextAware{ private static ApplicationContext applicationContext = null; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtil.applicationContext == null){ SpringUtil.applicationContext = applicationContext; } System.out.println("---------------------------------------------------------------------"); System.out.println("---------------------------------------------------------------------"); System.out.println("---------------com.kfit.base.util.SpringUtil------------------------------------------------------"); System.out.println("========ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext="+SpringUtil.applicationContext+"========"); System.out.println("---------------------------------------------------------------------"); } //获取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通过name获取 Bean. publicstatic Object getBean(String name){ return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } //通过name,以及Clazz返回指定的Bean public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } }启动应用，查看控制台的打印信息: ======ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,
不在Spring Boot的扫描包下方式一 编写工具类 import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; public class SpringUtil implements ApplicationContextAware{ private static ApplicationContext applicationContext = null; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtil.applicationContext == null){ SpringUtil.applicationContext = applicationContext; } System.out.println("---------------------------------------------------------------------"); System.out.println("---------------------------------------------------------------------"); System.out.println("---------------simple.plugin.spring.SpringUtil------------------------------------------------------"); System.out.println("========ApplicationContext配置成功,在普通类可以通过调用SpringUtils.getAppContext()获取applicationContext对象,applicationContext="+SpringUtil.applicationContext+"========"); System.out.println("---------------------------------------------------------------------"); } //获取applicationContext public static ApplicationContext getApplicationContext() { returnapplicationContext; } //通过name获取 Bean. public static Object getBean(String name){ return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } //通过name,以及Clazz返回指定的Bean public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } }使用@Bean注解，在App.java类中将SpringUtil注解进来
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Import; import simple.plugin.spring.SpringUtil; /** * Hello world! * */ //其中@SpringBootApplication申明让spring boot自动给程序进行必要的配置，等价于以默认属性使用@Configuration，@EnableAutoConfiguration和@ComponentScan @SpringBootApplication @ServletComponentScan public class App { /**注册Spring Util * 这里为了和上一个冲突，所以方面名为：springUtil2 * 实际中使用springUtil */ @Bean public SpringUtil springUtil2(){return new SpringUtil();} /** * 参数里VM参数设置为： -javaagent:.\lib\springloaded-1.2.4.RELEASE.jar -noverify * @param args */ public static void main(String[] args) { SpringApplication.run(App.class, args); } } 不在Spring Boot的扫描包下方式二 代码基本和上面都是相同的，主要是在App.java中使用@Import进行导入。 而且在SpringUtil是不需要添加@Component注解 @SpringBootApplication @ServletComponentScan @Import(value={SpringUtil.class}) publicclass App { //省略其它代码. }在普通类既可以使用:SpringUtil.getBean() 获取到Spring IOC容器中的bean 在Spring管理的类中使用：@Resouce或者@Autowired 进行注入使用
原文：http://412887952-qq-com.iteye.com/blog/2292388
