普通线程类获取service，controller等spring容器类

た入场券 2021-11-05 12:04 268阅读 0赞

package com.zihexin.application.strategy;
    
    import org.springframework.beans.BeansException;
    import org.springframework.beans.factory.NoSuchBeanDefinitionException;
    import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
    import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.stereotype.Component;
    
    /**
     * @Author: SimonHu
     * @Date: 2019/7/18 16:05
     * @Description:普通线程类获取service类,命名不规范会导致获取不到bean，可以断点查看beanFactory.getBean内beanDefinitionMap内
     * 具体bean的别名；
     */
    @Component
    public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware {
        /**
         * Spring应用上下文环境
         */
        private static ConfigurableListableBeanFactory beanFactory;
        private static ApplicationContext applicationContext = null;
        
        @Override
        public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
            SpringUtils.beanFactory = beanFactory;
        }
        
        /**
         * 获取对象
         *
         * @param name
         * @return Object 一个以所给名字注册的bean的实例
         * @throws org.springframework.beans.BeansException
         */
        @SuppressWarnings("unchecked")
        public static <T> T getBean(String name) throws BeansException {
            return (T) beanFactory.getBean(name);
        }
        
        /**
         * 获取类型为requiredType的对象
         *
         * @param clz
         * @return
         * @throws org.springframework.beans.BeansException
         */
        public static <T> T getBean(Class<T> clz) throws BeansException {
            T result = (T) beanFactory.getBean(clz);
            return result;
        }
        
        /**
         * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
         *
         * @param name
         * @return boolean
         */
        public static boolean containsBean(String name) {
            return beanFactory.containsBean(name);
        }
        
        /**
         * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
         *
         * @param name
         * @return boolean
         * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
         */
        public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
            return beanFactory.isSingleton(name);
        }
        
        /**
         * @param name
         * @return Class 注册对象的类型
         * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
         */
        public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
            return beanFactory.getType(name);
        }
        
        /**
         * 如果给定的bean名字在bean定义中有别名，则返回这些别名
         *
         * @param name
         * @return
         * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
         */
        public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
            return beanFactory.getAliases(name);
        }
        
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            if (SpringUtils.applicationContext == null) {
                SpringUtils.applicationContext = applicationContext;
            }
        }
        
        //获取applicationContext
        public static ApplicationContext getApplicationContext() {
            return applicationContext;
        }
    }

使用方法：

@Component
    public class TPPStrategy implements Strategy {
        @Autowired
        private TPPTask tppTask;
        
        public TPPStrategy() {
           //  beanName 不规范会导致获取失败，看工具类描述
            tppTask = SpringUtils.getBean("TPPTask");
        }
    
         @Override
        public void consumeTask() {
            tppTask.consumeTask();
        }
    }

转载于:https://www.cnblogs.com/SimonHu1993/p/11208458.html