package com.zheng.common.util;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import java.util.Map;
/**
* 资源文件读取工具
*
* @author shuzheng
* @date 2016年10月15日
*/
public class SpringContextUtil implements ApplicationContextAware {
private static ApplicationContext context = null;
private SpringContextUtil() {
super();
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
context = applicationContext;
}
/**
* 根据名称获取bean
* @param beanName
* @return
*/
public static Object getBean(String beanName) {
return context.getBean(beanName);
}
/**
* 根据bean名称获取指定类型bean
* @param beanName bean名称
* @param clazz 返回的bean类型,若类型不匹配,将抛出异常
*/
public static <T> T getBean(String beanName, Class<T> clazz) {
return context.getBean(beanName, clazz);
}
/**
* 根据类型获取bean
* @param clazz
* @return
*/
public static <T> T getBean(Class<T> clazz) {
T t = null;
Map<String, T> map = context.getBeansOfType(clazz);
for (Map.Entry<String, T> entry : map.entrySet()) {
t = entry.getValue();
}
return t;
}
/**
* 是否包含bean
* @param beanName
* @return
*/
public static boolean containsBean(String beanName) {
return context.containsBean(beanName);
}
/**
* 是否是单例
* @param beanName
* @return
*/
public static boolean isSingleton(String beanName) {
return context.isSingleton(beanName);
}
/**
* bean的类型
* @param beanName
* @return
*/
public static Class getType(String beanName) {
return context.getType(beanName);
}
}