后端已经配置允许跨域,但是前端依然报错跨域问题的解决方法

　　postman测试接口正常,如图:

　

　　后端也已经配置允许跨域,我觉得问题应该是配置了但是没有进到这里吧,因为其他接口在前端是能够正常访问的,贴上配置代码:

@Component
@Slf4j
public class AccessFilter implements HandlerInterceptor {

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        this.accessConfig(response);
        return true;
    }
    /**
     * 配置跨域
     *
     * @param response
     */
    private void accessConfig(HttpServletResponse response) {
        log.debug("我进来了吗第二层");
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE, PATCH");
        response.setHeader("Access-Control-Expose-Headers", "*");
        response.setHeader("Access-Control-Allow-Headers", "Authentication,Origin, X-Requested-With, Content-Type, Accept, x-access-token");
        response.setHeader("Cache-Control", "no-cache");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Expires ", "-1");
    }
}

　　但是:前端却提示:

　　

 

  　 百度了很多方法,但是都没有解决,直到我看到了这篇博客,地址:https://blog.csdn.net/garyond/article/details/80192760

　　然后我在写的接口上面加了注解:@CrossOrigin,问题完美解决~,如图:

 

      

 

 　　重启后端,前端访问,完美运行:

　　

 

 

 　　如果觉得有用大家可以点个赞丫~新人一枚,有什么问题也欢迎指正~这是我踩到的小小坑之一,庆幸能够解决啦~

 

参考博客:https://blog.csdn.net/garyond/article/details/80192760