package com.kidgrow.common.utils;
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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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* 石家庄喜高科技有限责任公司 版权所有 © Copyright 2020<br>
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*
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* @Description: 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<br>
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* @Project: <br>
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* @CreateDate: Created in 2020/2/4 13:55 <br>
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* @Author: <a href="4345453@kidgrow.com">liuke</a>
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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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@Override
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public void setApplicationContext(ApplicationContext applicationContext) {
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// NOSONAR
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SpringContextHolder.applicationContext = applicationContext;
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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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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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public static <T> T getBean(Class<T> clazz) {
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checkApplicationContext();
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return (T) applicationContext.getBean(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(
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"applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");
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}
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}
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}
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