SpringBoot 2.0 @CrossOrigin 无法跨域问题

在spring boot 1.5中，配置跨域一般是直接在controller或是在某一个方法上添加 @CrossOrigin 注解即可，如下代码

 

/**
 * @author chenws
 * @decription
 * @date 2018/10/18
 */
@RestController
@RequestMapping(value = "xxx")
@CrossOrigin(maxAge = 3600)
public class TestController {

	@ApiOperation("xxx")
	@RequestMapping(value = "/xxx",method = RequestMethod.POST)
	public ResponseVO> test(@RequestBody xxx xxx){}
}

但是在spring boot 2.0中（springframework5.0.2后），以上方法行不通，后来查看@CrossOrigin源码

springframework4.3.12：

/**
	 * Whether the browser should include any cookies associated with the
	 * domain of the request being annotated.
	 * 
Set to {@code "false"} if such cookies should not included.
	 * An empty string ({@code ""}) means undefined.
	 * {@code "true"} means that the pre-flight response will include the header
	 * {@code Access-Control-Allow-Credentials=true}.
	 * 
If undefined, credentials are allowed.
	 */
	String allowCredentials() default "";

springframework5.0.2

/**
	 * Whether the browser should send credentials, such as cookies along with
	 * cross domain requests, to the annotated endpoint. The configured value is
	 * set on the {@code Access-Control-Allow-Credentials} response header of
	 * preflight requests.
	 * 
NOTE: Be aware that this option establishes a high
	 * level of trust with the configured domains and also increases the surface
	 * attack of the web application by exposing sensitive user-specific
	 * information such as cookies and CSRF tokens.
	 * 
By default this is not set in which case the
	 * {@code Access-Control-Allow-Credentials} header is also not set and
	 * credentials are therefore not allowed.
	 */
	String allowCredentials() default "";

By default this is not set in which case the {@code Access-Control-Allow-Credentials} header is also not set and credentials are therefore not allowed.

5.0.2后，allowCredentials默认为false了，再看 DefaultCorsProcessor

if (Boolean.TRUE.equals(config.getAllowCredentials())) {

	responseHeaders.setAccessControlAllowCredentials(true);

}

allowCredentials为true时，返回的响应头AccessControlAllowCredentials属性才设置为true，允许客户端携带验证消息。

解决办法：

在注解中设置allowCredentials为true即可。

@CrossOrigin(allowCredentials="true",maxAge = 3600)