我有一个网关，里面有一些用Java Sping Boot 开发的API。但是当我从我的react项目中调用API时，抛出了下面的错误。

Access to XMLHttpRequest at 'http://localhost:8081/testgw/hello' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

我已经将@CrossOrigin注解添加到我的rest控制器中，如下所示。

@CrossOrigin(origins= {"*"}, maxAge = 4800, allowCredentials = "false" )
@RestController
public class FTController {

    @GetMapping("/hello")
    public String getHello() {    
        return "Hello World!";
    }
}

我从我的react项目中调用API，如下所示

var url = "http://localhost:8081/testgw/hello";
axios.get(url, {
    headers: {
        'Authorization' : 'Basic [AuthKey]',
        'Access-Control-Allow-Origin':'*',
        'Access-Control-Allow-Methods':'GET,POST,OPTIONS,DELETE,PUT'
    }
})
.then(
    function(response) {
        console.log("response --> " + response);
    }).catch(function(error) {
        console.log(error);
    }
);

我不是在摆脱这个问题，请让我知道我应该做些什么来解决这个问题。