Java Spring Boot：我正在尝试将CacheControl标头添加到ResponseEntity

我在 Java Spring中不是很好,但我想在我的ResponseEntity中添加Cache-Control标头.

@RequestMapping(value = "/data/{id}",method = GET")
public ResponseEntity<String> getData(@PathVariable("id") String id) {
    try {
            ...
            HttpHeaders headers = new HttpHeaders();
            headers.setCacheControl("max-age=600");

            return new ResponseEntity<String>(body,headers,HttpStatus.OK);
        }
}

我为HttpHeaders添加了两行代码,现在我在响应中得到两个Cache-Control头：

HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache,no-store,max-age=0,must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
Strict-Transport-Security: max-age=31536000 ; includeSubDomains
Cache-Control: max-age=600
Content-Type: application/json;charset=UTF-8
Content-Length: 18223
Date: Wed,29 Jun 2016 21:56:57 GMT

我做错了什么？有人能帮助我吗？

解决方法

只需将以下内容添加到application.properties：

security.headers.cache=false

更多细节

正如Spring Security documentation所述：

Spring Security allows users to easily inject the default security
headers to assist in protecting their application. The default for
Spring Security is to include the following headers:

Cache-Control: no-cache,must-revalidate
Pragma: no-cache
Expires: 0
X-Content-Type-Options: nosniff
Strict-Transport-Security: max-age=31536000 ; includeSubDomains
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block

now I get 2 CacheControl headers in my response

其中一个由Spring Security提供.如果您不喜欢它们,可以在WebSecurityConfigurerAdapter中禁用默认的Cache-Control标头：

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    // Other configurations

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                // Other configurations
                .headers()
                    .cacheControl().disable();
    }
}

由于您使用的是Spring Boot,因此可以使用security.headers.*属性实现相同功能.要禁用该默认的Cache-Control标头,只需将以下内容添加到application.properties：

security.headers.cache=false

此外,添加Cache-Control标头的更惯用的方法是使用新的cacheControl构建器：

ResponseEntity.ok()
              .cacheControl(CacheControl.maxAge(600,TimeUnit.SECONDS))
              .body(body);

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