Springboot2.5.x+过滤器异常捕获_springboot filter异常捕获-优快云博客

本文链接：https://blog.youkuaiyun.com/a309220728/article/details/124177762

本文介绍了一种在Spring Boot应用中自定义错误处理的方法，通过`FilterErrorController`扩展`BasicErrorController`，实现Web页面和非Web页面的错误响应。关键在于`Object attribute=request.getAttribute(javax.servlet.error.exception);`这行代码，它用于获取抛出的异常信息，并根据异常类型返回不同的错误信息。

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之前用的2.2.x版本的,代码有所变化,废话不多说,直接上干货.

package com.mine.common.auth.exception;

import cn.dev33.satoken.exception.NotLoginException;
import com.mine.common.core.enums.BaseCode;
import com.mine.common.core.web.domain.AjaxResult;
import com.mine.common.core.web.domain.ResponseResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.ErrorProperties;
import org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController;
import org.springframework.boot.autoconfigure.web.servlet.error.ErrorViewResolver;
import org.springframework.boot.web.servlet.error.DefaultErrorAttributes;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * <p>  </p>
 *
 * @author ZY
 * @version 1.0
 * @date 2022/3/18 16:34
 * @since 0.0.1
 */
@Component
public class FilterErrorController extends BasicErrorController {
    public FilterErrorController() {
        super(new DefaultErrorAttributes(), new ErrorProperties());
    }

    /**
     * Web页面错误处理
     */
    @RequestMapping(produces = MediaType.TEXT_HTML_VALUE)
    public ModelAndView errorHtml(HttpServletRequest request, HttpServletResponse response) {
        HttpStatus status = getStatus(request);
        Map<String, Object> model = Collections
                .unmodifiableMap(getErrorAttributes(request, getErrorAttributeOptions(request, MediaType.TEXT_HTML)));
        response.setStatus(status.value());
        ModelAndView modelAndView = resolveErrorView(request, response, status, model);
        return (modelAndView != null) ? modelAndView : new ModelAndView("error", model);
    }

    /**
     * 除Web页面外的错误处理，比如Json/XML等
     */
    @RequestMapping
    public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
        HttpStatus status = getStatus(request);
        if (status == HttpStatus.NO_CONTENT) {
            return new ResponseEntity<>(status);
        }
        Object attribute = request.getAttribute("javax.servlet.error.exception");
        String message = "系统异常";
        int busCode = 99999;
        if (attribute instanceof NotLoginException){
            NotLoginException exception = (NotLoginException)attribute;
            message =  exception.getLocalizedMessage();
            busCode = Integer.parseInt(exception.getType());
        }
        Map<String, Object> body = getErrorAttributes(request, getErrorAttributeOptions(request, MediaType.ALL));
        return new ResponseEntity<>(ResponseResult.convertMap(ResponseResult.fail(busCode,message),body), status);
    }
}

其实就是抛出我们想抛出的异常,主要在于这句代码:

Object attribute = request.getAttribute("javax.servlet.error.exception");