springboot java 跨域 问题处理

问题

很多时候在控制器中设置了跨域注解 没有用！

直接在拦截器中配置

方式一

@Component
public class TokenInterceptor implements HandlerInterceptor {



    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("进入LoginInterceptor拦截器---------------------------------------");


        //添加跨域CORS
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Headers", "X-Requested-With,content-type,token");
        response.setHeader("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH");
}
}

方式二

利用 CorsConfiguration 类解决

  /**
     * 配置跨域
     * @return
     */
    @Bean
    public CorsWebFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        // cookie跨域
        config.setAllowCredentials(Boolean.TRUE);
        config.addAllowedMethod("*");
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        // 配置前端js允许访问的自定义响应头
        config.addExposedHeader("token");
        config.addExposedHeader("username");
        config.addExposedHeader("content-disposition");
        config.addExposedHeader("filename");

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);

        return new CorsWebFilter(source);
    }

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