springboot跨域

跨域访问时很多需求，所以springboot的跨域解决也是【必须的】

1.注解方式（个人比较喜欢，方便省事）

直接添加一个注解 @CrossOrigin 

如图：

2.拦截器方式

//自定义拦截器
import org.springframework.web.servlet.handlerinterceptor;

public class CorsInterceptor implements handlerinterceptor{

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest,HttpServletResponse httpServletResponse,Object o) throws Exception{

    String origin = httpServletRequest.getHeader("Origin");
    httpServletResponse.setHeader("Access-Control-Allow-Origin",origin);
    httpServletResponse.setHeader("Access-Control-Allow-Methods","*");
    httpServletResponse.setHeader("Access-Control-Allow-Headers","Origin,Content-Type,Accept,token,X-Requested-With");
    httpServletResponse.setHeader("Access-Control-Allow-Credentials","true");

    return true;
    }
    //其他postHandle,afterCompletion空继承
}

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//配置类加入自定义拦截器
@Configuration
public class MvcConfig extends WebMvcConfigurationSupport{

    @Override
    public void addInterceptors(InterceptorRegistry registry){
        registry.addInterceptor(new CorsInterceptor()).addpathPatterns("/**");
    }

}