HandlerInterceptorAdapter

spring 拦截器 

 

1.  

@Component
public class myInterceptor extends HandlerInterceptorAdapter

 

2.    重写此方法

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (handler instanceof HandlerMethod) {
HandlerMethod handlerMethod = (HandlerMethod) handler;
Method method = handlerMethod.getMethod();
myInterceptor annotation = method.getAnnotation(myInterceptor.class);
return null;
}
return super.preHandle(request, response, handler);

 

 

3. 注册此拦截器

@Configuration
public class MvcConfig implements WebMvcConfigurer

 

@Override
public void addInterceptors(InterceptorRegistry registry) {
log.info("注册拦截器");
registry.addInterceptor(myInterceptor).addPathPatterns(myInterceptor.split(","));
}

 

 

注册一个Bean

@Configuration
public class ActivitiIncludeConfig implements BeanPostProcessor {

    @PostConstruct
    public void run() {
        String includeFlowVersion = ServiceFactory.getPropertiesValue("includeFlowVersion");

        String version = ServiceFactory.getPropertiesValue("app.version");
        // 如果没有配置这个属性 或者 这个属性配置为false
        if(StringUtils.isBlank(includeFlowVersion) || !TypeUtils.castToBoolean(includeFlowVersion)){
            return ;
        }
        Class<?> aClass = null;
        try {
            aClass = Class.forName("org.activiti.engine.impl.db.DbSqlSession");
            Field versionField = aClass.getDeclaredField("ACTIVITI_VERSIONS");
            ReflectionUtils.makeAccessible(versionField);
            List<ActivitiVersion> lists = (List)versionField.get(null);
            lists.add(new ActivitiVersion("6.4.1.3"));
            Object o = versionField.get(null);
            System.out.println(o);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }


}