springboot解決跨域請求

感覺跨域這個東西用的時候記不住，就記了下來方便cv

方案一

@Configuration
public class GlobalCorsConfig {

    /**
     * 允許跨域調用的過濾器
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        //允許所有域名進行跨域調用
        config.addAllowedOrigin("*");
        //允許跨越發送cookie
        config.setAllowCredentials(true);
        //放行全部原始頭信息
        config.addAllowedHeader("*");
        //允許所有請求方法跨域調用
        config.addAllowedMethod("*");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        return new CorsFilter(source);
    }
}

方案二

@Component
public class SimpleCORSFilter implements Filter {
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With");
        chain.doFilter(req, res);

    }
    public void init(FilterConfig filterConfig) {}
    public void destroy() {}

}

方案三

或者在Controller類上直接加@CrossOrigin註解