SpringBoot中普通类无法通过@Autowired自动注入Service、dao等bean解决方法

无法注入原因：

有的时候我们有一些类并不想注入Spring容器中，有Spring容器实例化，但是我们又想使用Spring容器中的一些对象，所以就只能借助工具类来获取了

工具类：

package com.mikey.design.utils;

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;

/**

 * @author Mikey

 * @Title:

 * @Description:

 * @Email:[e-mail]

 * @date 2018/12/3 21:57

 * @Version 1.0

 */

@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);

    }

}

使用：