我希望在后台报错后,可以返回统一的报错信息,但是@ControllerAdvice只能捕获到Controller层面上的报错,但是没法捕获到Filter报错。所以我的做法是写一个Filter(在所有Filter的最前面)去try catch 。
但是这么写了之后,会打乱了shiro的过滤器链的执行顺序,导致我在后面的自定义的过滤器中无法获取到Shiro的Subject
自定义的Filter有GlobalExceptionHandle(全局捕获Filter)、LoginActionFilter(在这里获取Subject)
GlobalExceptionHandle
@WebFilter("/api/*")
public class GlobalExceptionHandler implements Filter {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
try {
filterChain.doFilter(servletRequest,servletResponse);
}
catch (RuntimeException e){
ServiceResult result=new ServiceResult();
result.isFailure("操作失败");
HttpServletResponse httpServletResponse=(HttpServletResponse) servletResponse;
httpServletResponse.setContentType("application/json; charset=utf-8");
PrintWriter writer = httpServletResponse.getWriter();
String json = JSON.toJSONString(result, SerializerFeature.WriteMapNullValue);
writer.append(json);
writer.flush();
writer.close();
}
}
}
设置GlobalExceptionHandle的Order:(这里采了小坑,用@Order注解设置是不起效果的,要用一下方式)
//过滤器相关配置,想要改Filter的是在顺序,直接在Filter上面加@Order是不起作用的
@Configuration
public class FilterConfig {
@Bean
public FilterRegistrationBean filterRegistrationBean(){
FilterRegistrationBean bean=new FilterRegistrationBean();
bean.setFilter(new GlobalExceptionHandler());
bean.addUrlPatterns("/*");
bean.setOrder(1);
return bean;
}
}
获取shiro过滤器链,在启动类上打断点获取:
GlobalExceptionHandle没有设置Order的:
把GlobalExceptionHandle的Order设置成 1 之后:(LoginActionFilter就会拿不到Subject)
解决办法:我目前的解决办法是 LoginActionFilter换用拦截器