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

￡神魔★判官ぃ 2022-04-24 06:00 373阅读 0赞

解决方式：手写一个工具类SpringUtil来调用bean

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:1625017540@qq.com
     * @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：

StringUtil.getBean(XXX)；

来自：[http://www.cnblogs.com/biaogejiushibiao/p/10061466.html][http_www.cnblogs.com_biaogejiushibiao_p_10061466.html]

[http_www.cnblogs.com_biaogejiushibiao_p_10061466.html]: http://www.cnblogs.com/biaogejiushibiao/p/10061466.html