服务器设置浏览器是否缓存

客官°小女子只卖身不卖艺 2021-12-11 21:04 326阅读 0赞

###### 好长时间没有更新文章了，发现多了几位小粉丝，正好今天 遇到一个问题，关于浏览器缓存的问题，那就分享给你们！ ( 题外话 ：安利一首 刘德华的 《十七岁》 好听！) ######

#### 1.首先明白浏览器缓存机制 （在此 ，我就不重复造轮子了 点击链接跳转查看，我就是看着这些文章学习的，给这些博主点赞 ?） ####

[1.深入理解浏览器的缓存机制][1.]  
[2.彻底理解浏览器缓存机制][2.]  
[3.浏览器缓存、HTTP缓存（强缓存、协商缓存），浏览器缓存和CDN的关系][3._HTTP_CDN]  
[4.HTTP强缓存和协商缓存][4.HTTP]

#### 2. 相信通过上面的文章 应该大致明白是怎么回事 ，那咱代码说话 ####

##### 注：为了不是每个方法都设置response的header 所以我就全局拦截请求，设置的response #####

*  SpringBoot 项目

package net.zlw.cloud.portal.config;
    import org.springframework.format.FormatterRegistry;
    import org.springframework.http.converter.HttpMessageConverter;
    import org.springframework.validation.MessageCodesResolver;
    import org.springframework.validation.Validator;
    import org.springframework.web.method.support.HandlerMethodArgumentResolver;
    import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
    import org.springframework.web.servlet.HandlerExceptionResolver;
    import org.springframework.web.servlet.HandlerInterceptor;
    import org.springframework.web.servlet.ModelAndView;
    import org.springframework.web.servlet.config.annotation.*;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.util.List;
    
    /** * @description: * @author: maofangfang * @time: 2019/7/9 14:04 */
    @Configuration
    public  class WebConfiguration implements WebMvcConfigurer { 
        /* * description: 拦截所有 * @date 2019/7/9 */
        @Override
        public void addInterceptors(InterceptorRegistry registry ) { 
            registry.addInterceptor(new HandlerInterceptor() { 
                @Override
                public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { 
                    //1*60*60*1000 一小时 //Expires:过时期限值
                    response.setDateHeader("Expires", System.currentTimeMillis()+1*60*60*1000);
                    //Cache-Control来控制页面的缓存与否,public:浏览器和缓存服务器都可以缓存页面信息；
                    response.setHeader("cache-control", "max-age=31536000,public,immutable");
                    //Last-Modified:页面的最后生成时间
                    response.setDateHeader("Last-Modified", new java.util.Date().getTime());        
                    //Pragma:设置页面是否缓存，为Pragma则缓存，no-cache则不缓存
                    response.setHeader("Pragma", "Pragma");
                    return true;
                }
    
                @Override
                public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { 
    
                }
    
                @Override
                public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { 
    
                }
            });
    
        }
    
        @Override
        public void configurePathMatch(PathMatchConfigurer configurer) { 
    
        }
        @Override
        public void configureContentNegotiation(ContentNegotiationConfigurer configurer) { 
    
        }
        @Override
        public void configureAsyncSupport(AsyncSupportConfigurer configurer) { 
    
        }
        @Override
        public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { 
    
        }
        @Override
        public void addFormatters(FormatterRegistry registry) { 
        }
    
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) { 
    
        }
    
        @Override
        public void addCorsMappings(CorsRegistry registry) { 
    
        }
    
        @Override
        public void addViewControllers(ViewControllerRegistry registry) { 
    
        }
    
        @Override
        public void configureViewResolvers(ViewResolverRegistry registry) { 
    
        }
    
        @Override
        public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) { 
    
        }
    
        @Override
        public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) { 
    
        }
    
        @Override
        public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { 
    
        }
    
        @Override
        public void extendMessageConverters(List<HttpMessageConverter<?>> converters) { 
    
        }
    
        @Override
        public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) { 
    
        }
    
        @Override
        public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) { 
    
        }
    
        @Override
        public Validator getValidator() { 
            return null;
        }
    
        @Override
        public MessageCodesResolver getMessageCodesResolver() { 
            return null;
        }
    }

#### 3.参考代码 ####

[页面的缓存与不缓存设置][Link 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjYzMzEzMQ_size_16_color_FFFFFF_t_70]

[1.]: https://www.jianshu.com/p/54cc04190252
[2.]: https://www.cnblogs.com/shixiaomiao1122/p/7591556.html
[3._HTTP_CDN]: https://www.jianshu.com/p/47f3406c8084
[4.HTTP]: https://segmentfault.com/a/1190000008956069
[Link 1]: https://www.cnblogs.com/liuling/p/2013-7-25-01.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjYzMzEzMQ_size_16_color_FFFFFF_t_70]: /images/20211211/82eb9496938646e69f84aaf236e51710.png