如何在Spring启动中启用浏览器缓存

Question

我正在尝试让spring boot让浏览器缓存静态资源。我的资源位于“静态”下的类路径中。当我查看发回的标题时，我看到修改标题设置得很好，但不知何故，标题“缓存控制：无存储”也被添加了。

HTTP/1.1 200
Last-Modified: Wed, 24 Aug 2016 08:50:16 GMT
Cache-Control: no-store
Accept-Ranges: bytes
Content-Type: text/css
Content-Length: 434554
Date: Wed, 24 Aug 2016 09:42:42 GMT

我已经看到了如何在Spring Boot中启用HTTP响应缓存的答案，但这似乎不适用于我，因为我没有使用Spring Security性，它不在类路径上。

我正在使用带有胸片的Spring启动1.4.0。

那么，如何让Spring Boot不包含缓存控制头呢？

Answer 1

至少在最近（2018）版本的SpringBoot中，您可以设置以下属性：

spring.resources.cache.cachecontrol.cache-private= # Indicate that the response message is intended for a single user and must not be stored by a shared cache.
spring.resources.cache.cachecontrol.cache-public= # Indicate that any cache may store the response.
spring.resources.cache.cachecontrol.max-age= # Maximum time the response should be cached, in seconds if no duration suffix is not specified.
spring.resources.cache.cachecontrol.must-revalidate= # Indicate that once it has become stale, a cache must not use the response without re-validating it with the server.
spring.resources.cache.cachecontrol.no-cache= # Indicate that the cached response can be reused only if re-validated with the server.
spring.resources.cache.cachecontrol.no-store= # Indicate to not cache the response in any case.
spring.resources.cache.cachecontrol.no-transform= # Indicate intermediaries (caches and others) that they should not transform the response content.
spring.resources.cache.cachecontrol.proxy-revalidate= # Same meaning as the "must-revalidate" directive, except that it does not apply to private caches.
spring.resources.cache.cachecontrol.s-max-age= # Maximum time the response should be cached by shared caches, in seconds if no duration suffix is not specified.
spring.resources.cache.cachecontrol.stale-if-error= # Maximum time the response may be used when errors are encountered, in seconds if no duration suffix is not specified.
spring.resources.cache.cachecontrol.stale-while-revalidate= # Maximum time the response can be served after it becomes stale, in seconds if no duration suffix is not specified.

https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html

Answer 2

事实证明，这很容易解决。

目录结构为classpath:/static/assets。要在响应中不添加缓存控制标头，请添加此类：

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/assets/**").addResourceLocations("classpath:/static/assets/").setCacheControl(CacheControl.empty());
    }
}

我仍然很困惑，spring boot的默认设置是“无商店”。。