如何在Spring MVC中设置缓存标头？

我刚刚遇到了同样的问题，并找到了框架已经提供的好解决方案。该类允许您定义默认缓存行为，以及特定于路径的覆盖（具有与其他地方相同的路径匹配器行为）。对我来说，步骤是：org.springframework.web.servlet.mvc.WebContentInterceptor

1. 确保我的 实例未设置“cacheSeconds”属性。org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter

2. 添加一个实例：WebContentInterceptor

   <mvc:interceptors>
   ...
   <bean class="org.springframework.web.servlet.mvc.WebContentInterceptor" p:cacheSeconds="0" p:alwaysUseFullPath="true" >
       <property name="cacheMappings">
           <props>
               <!-- cache for one month -->
               <prop key="/cache/me/**">2592000</prop>
               <!-- don't set cache headers -->
               <prop key="/cache/agnostic/**">-1</prop>
           </props>
       </property>
   </bean>
   ...
   </mvc:interceptors>
   

在这些更改之后，/foo 下的响应包括标头以阻止缓存，/cache/me 下的响应包含标头以鼓励缓存，/cache/不可知论下的响应不包含与缓存相关的标头。

如果使用纯 Java 配置：

@EnableWebMvc
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
  /* Time, in seconds, to have the browser cache static resources (one week). */
  private static final int BROWSER_CACHE_CONTROL = 604800;

  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry
     .addResourceHandler("/images/**")
     .addResourceLocations("/images/")
     .setCachePeriod(BROWSER_CACHE_CONTROL);
  }
}

参见：http://docs.spring.io/spring-security/site/docs/current/reference/html/headers.html

答案很简单：

@Controller
public class EmployeeController {

    @RequestMapping(value = "/find/employer/{employerId}", method = RequestMethod.GET)
    public List getEmployees(@PathVariable("employerId") Long employerId, final HttpServletResponse response) {
        response.setHeader("Cache-Control", "no-cache");
        return employeeService.findEmployeesForEmployer(employerId);
    }

}