909422229_Spring上下文操作工具类：SpringContextUtil

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import com.nongfadai.lambda.service.common.event.LambdaBaseEvent;

@Component
public class SpringContextUtil implements ApplicationContextAware {

private static ApplicationContext applicationContext; // Spring应用上下文环境

    /**
     * 实现ApplicationContextAware接口的回调方法，设置上下文环境
     * 
     * @param applicationContext
     * @throws BeansException
     */
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }

/**
     * @return ApplicationContext
     */
    public static ApplicationContext getApplicationContext() {
return applicationContext;
    }

/**
     * 获取对象
     * 
     * @param name
     * @return Object 一个以所给名字注册的bean的实例
     * @throws BeansException
     */
    public static Object getBean(String name) throws BeansException {
return applicationContext.getBean(name);
    }

/**
     * 获取类型为requiredType的对象 如果bean不能被类型转换，相应的异常将会被抛出（BeanNotOfRequiredTypeException）
     * 
     * @param name bean注册名
     * @param requiredType 返回对象类型
     * @return Object 返回requiredType类型对象
     * @throws BeansException
     */
    public static  T getBean(String name, Class requiredType) throws BeansException {
return applicationContext.getBean(name, requiredType);
    }

/**
     * 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 applicationContext.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 NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
return applicationContext.isSingleton(name);
    }

/**
     * @param name
     * @return Class 注册对象的类型
     * @throws NoSuchBeanDefinitionException
     */
    public static Class getType(String name) throws NoSuchBeanDefinitionException {
return applicationContext.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 NoSuchBeanDefinitionException
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
return applicationContext.getAliases(name);
    }

/**
     * 发布自定义业务事件
     *
     * @param eventMsg
     */
    public static void publishEvent(LambdaBaseEvent event) {
applicationContext.publishEvent(event);
    }
}