spring boot项目如何设置全局跨域配置

方法一：

@Configuration
public class GlobalCorsConfig {

    @Bean
    public FilterRegistrationBean<CorsFilter> corsFilter() {
        // 创建 UrlBasedCorsConfigurationSource 配置源，类似 CorsRegistry 注册表
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        // 创建 CorsConfiguration 配置，相当于 CorsRegistration 注册信息
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowedOrigins(Collections.singletonList("*")); // 允许所有请求来源
        config.setAllowCredentials(true); // 允许发送 Cookie
        config.addAllowedMethod("*"); // 允许所有请求 Method
        config.setAllowedHeaders(Collections.singletonList("*")); // 允许所有请求 Header
        // config.setExposedHeaders(Collections.singletonList("*")); // 允许所有响应 Header
        config.setMaxAge(1800L); // 有效期 1800 秒，2 小时
        source.registerCorsConfiguration("/**", config);
        // 创建 FilterRegistrationBean 对象
        FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(
                new CorsFilter(source)); // 创建 CorsFilter 过滤器
        bean.setOrder(Integer.MIN_VALUE ); // 设置 order 排序。这个顺序很重要哦，为避免麻烦请设置在最前
        return bean;
    }
}

方法二：

@Configuration
public class GlobalCorsConfig {

    /**
     * 允许跨域调用的过滤器
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        //允许所有域名进行跨域调用
        config.addAllowedOrigin("*");
        //允许跨越发送cookie
        config.setAllowCredentials(true);
        //放行全部原始头信息
        config.addAllowedHeader("*");
        //允许所有请求方法跨域调用
        config.addAllowedMethod("*");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        return new CorsFilter(source);
    }
}

整合shiro框架的话，可以在自定义Filter设置

/**
     * 对跨域提供支持
     */
    @Override
    protected boolean preHandle(ServletRequest request, ServletResponse response) throws Exception {
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
        httpServletResponse.setHeader("Access-control-Allow-Origin", httpServletRequest.getHeader("Origin"));
        httpServletResponse.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
        httpServletResponse.setHeader("Access-Control-Allow-Headers", httpServletRequest.getHeader("Access-Control-Request-Headers"));
        // 跨域时会首先发送一个option请求，这里我们给option请求直接返回正常状态
        if (httpServletRequest.getMethod().equals(RequestMethod.OPTIONS.name())) {
            httpServletResponse.setStatus(HttpStatus.OK.value());
            return false;
        }
        return super.preHandle(request, response);
    }