通过spring工具类获取bean

package xxx;

 

import org.springframework.beans.BeansException;

import org.springframework.beans.factory.NoSuchBeanDefinitionException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

import org.springframework.stereotype.Component;

 

@Component

public class SpringUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext = null;

 

    public SpringUtil() {

    }

 

    public void setApplicationContext(ApplicationContext arg0) throws BeansException {

        if (applicationContext == null) {

            applicationContext = arg0;

        }

 

    }

 

    public static ApplicationContext getApplicationContext() {

        return applicationContext;

    }

 

    public static void setAppCtx(ApplicationContext webAppCtx) {

        if (webAppCtx != null) {

            applicationContext = webAppCtx;

        }

    }

 

    /**

     * 拿到ApplicationContext对象实例后就可以手动获取Bean的注入实例对象

     */

    public static <T> T getBean(Class<T> clazz) {

        return getApplicationContext().getBean(clazz);

    }

 

    public static <T> T getBean(String name, Class<T> clazz) throws ClassNotFoundException {

        return getApplicationContext().getBean(name, clazz);

    }

 

    public static final Object getBean(String beanName) {

        return getApplicationContext().getBean(beanName);

    }

 

    public static final Object getBean(String beanName, String className) throws ClassNotFoundException {

        Class<?> clz = Class.forName(className);

        return getApplicationContext().getBean(beanName, clz.getClass());

    }

 

    public static boolean containsBean(String name) {

        return getApplicationContext().containsBean(name);

    }

 

    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {

        return getApplicationContext().isSingleton(name);

    }

 

    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {

        return getApplicationContext().getType(name);

    }

 

    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {

        return getApplicationContext().getAliases(name);

    }

}