java-配置跨域

1 过滤器

public class CrossFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // do nothing
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, Cache-Control, Content-Type,Authorization");
        response.setHeader("Access-Control-Max-Age", "600");

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        if (request.getMethod().equals("OPTIONS")) {
            response.setStatus(204);
            return;
        }

        filterChain.doFilter(servletRequest, servletResponse);

        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
    }

    @Override
    public void destroy() {
        // do nothing
    }
}

2 webMVC配置

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * 注册跨域过滤器
     *
     * @return
     */
    @Bean("registerCrossFilter")
    public FilterRegistrationBean registerCrossFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new CrossFilter());
        registration.addUrlPatterns("/*");
        registration.setOrder(1);

        return registration;
    }



}