一.拦截步骤

• 请求页面不存在的时候 拦截 Whitelabel Error Page, 该页面是Spring-boot默认的页面.
  
  image.png
• 在application.yml中如下配置:

  #禁用spring boot 的异常页面 <<Whitelabel Error Page>>
    error:
      whitelabel:
        enabled: true
  

• 自己实现ErrorController接口.

    package com.soufang.esproject.base;
  
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.autoconfigure.web.ErrorAttributes;
    import org.springframework.boot.autoconfigure.web.ErrorController;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.context.request.RequestAttributes;
    import org.springframework.web.context.request.ServletRequestAttributes;
  
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.util.Map;
  
    /**
     * web错误 全局配置
     * Created by liangxifeng.
     */
    @Controller
    public class AppErrorController implements ErrorController {
        private static final String ERROR_PATH = "/error";
  
        private ErrorAttributes errorAttributes;
  
        @Override
        public String getErrorPath() {
        return ERROR_PATH;
        }
  
        @Autowired
        public AppErrorController(ErrorAttributes errorAttributes) {
        this.errorAttributes = errorAttributes;
        }
  
        /**
         * Web页面错误处理
         * 客户端使用 浏览器 方式请求异常时会触发
         */
        @RequestMapping(value = ERROR_PATH, produces = "text/html")
        public String errorPageHandler(HttpServletRequest request, HttpServletResponse response) {
        int status = response.getStatus();
        //访问resources/templates/403.html,404.html,500.html
        switch (status) {
            case 403:
                return "403";
            case 404:
                return "404";
            case 500:
                return "500";
        }
  
        return "index";
        }
  
        /**
         * 除Web页面外的错误处理，比如Json/XML等
         * 客户端使用 rest 方式请求异常时会触发
         */
        @RequestMapping(value = ERROR_PATH)
        @ResponseBody
        public ApiResponse errorApiHandler(HttpServletRequest request) {
        RequestAttributes requestAttributes = new ServletRequestAttributes(request);
  
        Map<String, Object> attr = this.errorAttributes.getErrorAttributes(requestAttributes, false);
        int status = getStatus(request);
  
        return ApiResponse.ofMessage(status, String.valueOf(attr.getOrDefault("message", "error")));
        }
  
        private int getStatus(HttpServletRequest request) {
        Integer status = (Integer) request.getAttribute("javax.servlet.error.status_code");
        if (status != null) {
            return status;
        }
        return 500;
        }
    }
  

二. ApiResonse内容请查看

• https://www.jianshu.com/p/fad048a81fcb