How do you set cache headers in Spring MVC?

user_61530 0
Viewed 90833

In an annotation-based Spring MVC controller, what is the preferred way to set cache headers for a specific path?

spring-mvc caching spring java
10 Answers

The answer is quite simple:

@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);
    }

}
Code above shows exactly what you want to achive. You have to do two things. Add "final HttpServletResponse response" as your parameter. And then set header Cache-Control to no-cache.

user_2811910

Starting with Spring 4.2 you can do this:

import org.springframework.http.CacheControl;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.TimeUnit;

@RestController
public class CachingController {
    @RequestMapping(method = RequestMethod.GET, path = "/cachedapi")
    public ResponseEntity<MyDto> getPermissions() {

        MyDto body = new MyDto();

        return ResponseEntity.ok()
            .cacheControl(CacheControl.maxAge(20, TimeUnit.SECONDS))
            .body(body);
    }
}

CacheControl object is a builder with many configuration options, see JavaDoc

user_666290

I found WebContentInterceptor to be the easiest way to go.

@Override
public void addInterceptors(InterceptorRegistry registry)
{
    WebContentInterceptor interceptor = new WebContentInterceptor();
    interceptor.addCacheMapping(CacheControl.noCache(), "/users", "admin");
    registry.addInterceptor(interceptor);
}
user_19990830

You could extend AnnotationMethodHandlerAdapter to look for a custom cache control annotation and set the http headers accordingly.

Admin1
Related