package com.hxzkoa.util;
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import org.springframework.context.ApplicationContext;
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import org.springframework.context.ApplicationContextAware;
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/**
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* 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候中取出ApplicaitonContext.
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*/
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public class SpringContextHolder implements ApplicationContextAware {
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private static ApplicationContext applicationContext;
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/**
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* 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
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*/
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public void setApplicationContext(ApplicationContext applicationContext) {
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SpringContextHolder.applicationContext = applicationContext; // NOSONAR
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}
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/**
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* 取得存储在静态变量中的ApplicationContext.
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*/
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public static ApplicationContext getApplicationContext() {
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checkApplicationContext();
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return applicationContext;
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}
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/**
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* 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
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*/
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@SuppressWarnings("unchecked")
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public static <T> T getBean(String name) {
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checkApplicationContext();
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return (T) applicationContext.getBean(name);
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}
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/**
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* 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
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*/
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@SuppressWarnings("unchecked")
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public static <T> T getBean(Class<T> clazz) {
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checkApplicationContext();
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return (T) applicationContext.getBeansOfType(clazz);
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}
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/**
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* 清除applicationContext静态变量.
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*/
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public static void cleanApplicationContext() {
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applicationContext = null;
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}
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private static void checkApplicationContext() {
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if (applicationContext == null) {
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throw new IllegalStateException("SpringContextHolder not config in applicationContext.xml ");
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}
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}
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}
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