记录一下，在springboot中配置ApplicationContext

ゝ一纸荒年。 2022-05-27 05:27 214阅读 0赞

记录一下，在springboot中配置ApplicationContext。

直接上代码~

import org.springframework.beans.BeansException;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.stereotype.Component;
    
    /**
     * Springboot 获取上下文<br/>
     * Author:杨杰超<br/>
     * Date:2017年5月20日 下午20:30:27 <br/>
     * Copyright (c) 2017, yangjiechao@dingtalk.com All Rights Reserved.<br/>
     *
     */
    @Component
    public class SpringApplicationContext implements ApplicationContextAware {
         
        private static ApplicationContext applicationContext;
    
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            if (SpringApplicationContext.applicationContext == null) {
                SpringApplicationContext.applicationContext = applicationContext;
            }
        }
    
        /**
         * 获取applicationContext
         * 
         * @return
         */
        public static ApplicationContext getApplicationContext() {
            return applicationContext;
        }
    
        /**
         * 通过name获取 Bean.
         * 
         * @param name
         * @return
         */
        public static Object getBean(String name) {
            return getApplicationContext().getBean(name);
        }
    
        /**
         * 通过class获取Bean.
         * 
         * @param clazz
         * @return
         */
        public static <T> T getBean(Class<T> clazz) {
            return getApplicationContext().getBean(clazz);
        }
    
        /**
         * 通过name,以及Clazz返回指定的Bean
         * 
         * @param name
         * @param clazz
         * @return
         */
        public static <T> T getBean(String name, Class<T> clazz) {
            return getApplicationContext().getBean(name, clazz);
        }
    
    }

再来个main方法试试

public static void main(String[] args) {
    
            UserService userService = SpringApplicationContext.getBean(UserService.class);
    
            EntityWrapper<UserDto> entityWrapper = new EntityWrapper<>();
            entityWrapper.eq("sex", 1);
            List<UserDto> userList = userService.selectList(entityWrapper);
    
            if (null != userList && !userList.isEmpty()) {
                for (UserDto userDto : userList) {
                    System.out.println(userDto.toString());
                }
            }
        }