Android Retrofit2 设置请求头Header

@Headers设置固定请求头

public interface HttpService {
    @Headers({
        "header1:headerValue1",
        "header2:headerValue2",
        "header3:headerValue3",
    })
    @POST("Login")
    Call login(@Body ReqLogin body);
}

@Header设置上可变请求头

public interface HttpService {
    @POST("login")
    Call login(@Body ReqLogin body, @Header("token") String token);
}