Spring工具类

需要在spring配置文件中配置springContextUtil的bean

?

1	<bean id="SpringContextUtil" lazy-init="false" class="com.alphajuns.ssm.util.SpringContextUtil" />

SpringContextUtil.java

package com.alphajuns.ssm.util;

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.Repository;

@Repository("springContextUtil")
public class SpringContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 按名称获取bean对象
     * @param name
     * @return
     * @throws BeansException
     */
    public static Object getBean(String name) throws BeansException {
        return applicationContext.getBean(name);
    }

    /**
     * 按名称获取指定类型的bean
     * @param name
     * @param requiredType
     * @return
     * @throws BeansException
     */
    public static Object getBean(String name, Class requiredType) throws BeansException {
        return applicationContext.getBean(name, requiredType);
    }

    /**
     * 判断是否包含对应名称的bean
     * @param name
     * @return
     */
    public static boolean containsBean(String name) {
        return applicationContext.containsBean(name);
    }

    /**
     * 获取指定名称bean的类型
     * @param name
     * @return
     * @throws NoSuchBeanDefinitionException
     */
    public static Class getType(String name) throws NoSuchBeanDefinitionException {
        return applicationContext.getType(name);
    }

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

    /**
     * 判断bean为单例模式
     * @param name
     * @return
     * @throws NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return applicationContext.isSingleton(name);
    }

}

测试

package com.alphajuns.junit;

import com.alphajuns.ssm.service.ItemService;
import com.alphajuns.ssm.util.SpringContextUtil;
import org.junit.Test;

import java.util.List;
import java.util.Map;

public class SpringContextUtilTest extends SuperJunitTest {

    @Test
    public void getBean() {
        ItemService itemService = (ItemService) SpringContextUtil.getBean("itemServiceImpl");
        List<Map<String, Object>> itemList = itemService.getItemList();
        System.out.println(itemList);
    }

    @Test
    public void isSingleton() {
        boolean flag = SpringContextUtil.isSingleton("itemServiceImpl");
        System.out.println(flag);
    }

}