SpringBoot+ES项目：6. 异常拦截器

小鱼儿 2021-11-02 16:58 407阅读 0赞

**1. 异常拦截器**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70]

异常页面示例  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 1]  
**2. 关闭SpringBoot异常拦截器**

server.error.whitelabel.enabled=false

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 2]

**3. 设计AppErrorController类**  
在Base包中设计一个AppErrorController实现ErrorController接口

package com.xunwu.base;
    /**
     * web错误 全局配置
     */
    @Controller
    public class AppErrorController implements ErrorController {
        private static final String ERROR_PATH = "/error";
    
        private ErrorAttributes errorAttributes;
    	//执行到error时返回 
        @Override
        public String getErrorPath() {
            return ERROR_PATH;
        }
        //注入errorAttributes
        @Autowired
        public AppErrorController(ErrorAttributes errorAttributes) {
            this.errorAttributes = errorAttributes;
        }
    
        /**
         * Web页面错误处理
         * 从HttpServletResponse 获取错误编码，按照错误编码返回页面
         */
        @RequestMapping(value = ERROR_PATH, produces = "text/html")
        public String errorPageHandler(HttpServletRequest request, HttpServletResponse response) {
            int status = response.getStatus();
            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
         */
        @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")));
        }
    	//获取status
        private int getStatus(HttpServletRequest request) {
            Integer status = (Integer) request.getAttribute("javax.servlet.error.status_code");
            if (status != null) {
                return status;
            }
    
            return 500;
        }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 3]

Spring Boot 实现ErrorController接口处理404、500等错误页面  
[https://www.cnblogs.com/moxiaotao/p/9629184.html][https_www.cnblogs.com_moxiaotao_p_9629184.html]  
Spring Boot web程序如何定制错误页面 (二)–实现ErrorController  
[https://blog.csdn.net/russle/article/details/81153732][https_blog.csdn.net_russle_article_details_81153732]  
Spring Boot默认异常处理BasicErrorController源码解读  
[https://blog.csdn.net/KKKun\_Joe/article/details/83305300][https_blog.csdn.net_KKKun_Joe_article_details_83305300]  
Javaweb学习之HttpServletRequest对象介绍  
[https://blog.csdn.net/jiahao1186/article/details/82026330][https_blog.csdn.net_jiahao1186_article_details_82026330]

**4. 错误页面开发**  
防止热加载设置，\*\*是正则表达式代表

spring.devtools.restart.exclude=templates/**,static/**

WebMvcConfig中设置一下UTF-8编码

templateResolver.setCharacterEncoding("UTF-8");

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 4]  
**效果**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2x0aGlyZG9uZWw_size_16_color_FFFFFF_t_70 6]

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[https_www.cnblogs.com_moxiaotao_p_9629184.html]: https://www.cnblogs.com/moxiaotao/p/9629184.html
[https_blog.csdn.net_russle_article_details_81153732]: https://blog.csdn.net/russle/article/details/81153732
[https_blog.csdn.net_KKKun_Joe_article_details_83305300]: https://blog.csdn.net/KKKun_Joe/article/details/83305300
[https_blog.csdn.net_jiahao1186_article_details_82026330]: https://blog.csdn.net/jiahao1186/article/details/82026330
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