springboot前后端分离解决跨域_springcloud前后端分离需要跨域吗-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_24053669/article/details/111915441

博客介绍了跨域问题的三种解决方式，分别是使用@CrossOrigin、使用拦截器和进行全局配置，为解决跨域问题提供了有效途径。

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1.使用@CrossOrigin

1.接口上使用：

@CrossOrigin(origins = {"http://localhost:9000", "null"})
@Mapping("/test")
public String greetings() {
    return "hello world ～";
}

2.类上使用：

@CrossOrigin(origins = {"http://localhost:9000", "null"})
@RestController
public class SpringBootCorsController {
    ····
}

2.使用拦截器

@Component
public class CrossFilter implements Filter {

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;
        response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "Content-Type,user-token");
        response.setHeader("Access-Control-Expose-Headers", "*");
        chain.doFilter(req, res);
    }


    public void init(FilterConfig filterConfig) {
    }

    public void destroy() {
    }
}

3.全局配置

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")
                .maxAge(3600)
                .allowCredentials(true);
    }
}