Spring通过配置文件获取bean（不用IOC）

1.写一个SpringContext的工具类 实现ApplicationContextAware接口

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

public class SpringContextUtil implements ApplicationContextAware{
    
    private static ApplicationContext applicationContext;     //Spring应用上下文环境

     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
       SpringContextUtil.applicationContext = applicationContext;
     }
     
     public static ApplicationContext getApplicationContext() {
       return applicationContext;
     }

     public static Object getBean(String name) throws BeansException {
       return applicationContext.getBean(name);
     }

     public static Object getBean(String name, Class requiredType) throws BeansException {
       return applicationContext.getBean(name, requiredType);
     }

     public static boolean containsBean(String name) {
       return applicationContext.containsBean(name);
     }

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

     public static Class getType(String name) throws NoSuchBeanDefinitionException {
       return applicationContext.getType(name);
     }

     public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
       return applicationContext.getAliases(name);
     }

}

2，Spring配置文件中添加关于该工具类的bean配置

 <bean id="SpringContextUtil " class="util.SpringContextUtil "  />

3.代码中使用

MongoTemplate temp = (MongoTemplate)SpringContextUtil.getBean("mongoTemplate");