springboot初始化bean(扫描自定义注解)_springboot初始化扫描全体包的注解有-优快云博客

本文介绍了一种通过自定义注解实现权限控制的方法。利用Spring框架提供的ApplicationListener监听机制，在项目启动时自动扫描所有带有自定义@AuthAnnotation注解的方法，并收集其权限声明。此方法适用于需要进行细粒度权限控制的应用场景。

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这里主要是扫描自定义注解

public class AnnotationScan implements ApplicationListener<ContextRefreshedEvent>{
    @Autowired
    RedisTemplate redisTemplate;

    private final static Logger logger = LoggerFactory.getLogger(AnnotationScan.class);

    /**
     * 初始化方法
     * @param event
     */
    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        HashSet<String> set = new HashSet<>();//权限点集合
        if(event.getApplicationContext().getParent() == null)
        {
            Map<String, Object> beans = event.getApplicationContext().getBeansWithAnnotation(RestController.class);//获取全部ControllerBean
            Set<Map.Entry<String, Object>> entries = beans.entrySet();//遍历Bean
            Iterator<Map.Entry<String, Object>> iterator = entries.iterator();
            while(iterator.hasNext()){
                Map.Entry<String, Object> map = iterator.next();
                Class<?> aClass = map.getValue().getClass();
                Method[] methods = aClass.getMethods();
                for (Method method: methods
                     ) {
                    AuthAnnotation annotation = method.getAnnotation(AuthAnnotation.class);
                    if(annotation==null){//有无权限注解
                        logger.warn("未作权限限制");
                    }else{
                        String[] authorities = annotation.authorities();
                        for (String authority: authorities
                             ) {
                            set.add(authority);//遍历权限点，放入集合中
                        }
                    }
                }
            }
        }
    }

配置类

@Bean
public AnnotationScan annotationScan(){return new AnnotationScan();}

原博客地址：https://blog.youkuaiyun.com/github_39525088/article/details/75304357