• 今天在使用SpringContextHolder来获取一个bean的时候出现错误，报错如下：

java.lang.IllegalStateException: applicaitonContext属性未注入, 请在applicationContext.xml中定义SpringContextHolder.
    at org.apache.commons.lang3.Validate.validState(Validate.java:826)
    at com.jituan.common.util.SpringContextHolder.assertContextInjected(SpringContextHolder.java:79)
    at com.jituan.common.util.SpringContextHolder.getBean(SpringContextHolder.java:41)
    at com.jituan.common.message.util.sms.SmsUtil.querySmsTemplate(SmsUtil.java:206)
    at com.jituan.common.message.util.sms.SmsUtil.send(SmsUtil.java:76)
    at com.jituan.common.message.processer.SmsProcesser.send(SmsProcesser.java:37)
    at com.jituan.batch.msghandler.MessageHandler.smsSend(MessageHandler.java:106)
    at com.jituan.batch.msghandler.MessageHandler$SmsTread.run(MessageHandler.java:185)

• 解决方案：

1. 在spring-mvc.xml中加入配置后解决：

<!-- 全局变量以便可以获得对应的注入bean -->
    <bean id="springContextHolder" class="com.jituan.common.util.SpringContextHolder" />

2. 在SpringContextHolder类上加入注解@Service、@Lazy(false)

• SpringContextHolder 具体实现：

import java.util.Map;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
 
/**
 *
 *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.
 * @author Bucky
 */
@Service
@Lazy(false)
public class SpringContextHolder implements ApplicationContextAware{
 
    private static ApplicationContext applicationContext;
 
     
    //实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextHolder.applicationContext = applicationContext;
    }
 
    
    //取得存储在静态变量中的ApplicationContext.
    public static ApplicationContext getApplicationContext() {
        checkApplicationContext();
        return applicationContext;
    }
     
    //从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        checkApplicationContext();
        return (T) applicationContext.getBean(name);
    }
 
     
    //从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
    //如果有多个Bean符合Class, 取出第一个.
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> clazz) {
        checkApplicationContext();
        @SuppressWarnings("rawtypes")
                Map beanMaps = applicationContext.getBeansOfType(clazz);
        if (beanMaps!=null && !beanMaps.isEmpty()) {
            return (T) beanMaps.values().iterator().next();
        } else{
            return null;
        }
    }
 
    private static void checkApplicationContext() {
        if (applicationContext == null) {
            throw new IllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");
        }
    }
 
}