noHandlerFound并在spring mvc中显示404时没有消息。

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver;
import org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CustomHandlerExceptionResolver extends AbstractHandlerExceptionResolver {

    @Override
    protected ModelAndView doResolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        if (ex instanceof NoHandlerFoundException) {
            // 处理noHandlerFound异常
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("error404"); // 设置自定义的错误页面
            return modelAndView;
        }
        // 其他异常交给默认的处理器处理
        return super.doResolveException(request, response, handler, ex);
    }
}

<mvc:annotation-driven>
    <mvc:exception-resolvers>
        <bean class="com.example.CustomHandlerExceptionResolver" />
    </mvc:exception-resolvers>
</mvc:annotation-driven>