titan.lightbatis.utils.SpringContextUtil Maven / Gradle / Ivy
package titan.lightbatis.utils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;
@Component
public class SpringContextUtil 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.
*/
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
SpringContextUtil.applicationContext = applicationContext;
}
/**
* 取得存储在静态变量中的ApplicationContext.
*/
public static ApplicationContext getContext() {
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 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.
*/
@SuppressWarnings("unchecked")
public static T getBean(Class clazz) {
checkApplicationContext();
return (T) applicationContext.getBeansOfType(clazz);
}
private static void checkApplicationContext() {
Assert.notNull(applicationContext,
"applicaitonContext未注入,请在applicationContext.xml中定义SpringContextUtil");
}
}