方式一推荐在spring.xml文件里写mvc:cors mvc:mapping path/** allowed-origin-patterns* allow-credentialstrue / /mvc:cors方式二配置过滤器解决跨域问题过滤器public class CorsFilter implements Filter { Override public void init(FilterConfig filterConfig) throws ServletException {} Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request (HttpServletRequest) servletRequest; HttpServletResponse response (HttpServletResponse) servletResponse; // 允许的域名 response.setHeader(Access-Control-Allow-Origin, http://localhost:8080); // 允许的方法 response.setHeader(Access-Control-Allow-Methods, GET, POST, PUT, DELETE, OPTIONS); // 允许的请求头 response.setHeader(Access-Control-Allow-Headers, *); // 允许携带凭证如cookie response.setHeader(Access-Control-Allow-Credentials, true); filterChain.doFilter(request, response); } Override public void destroy() {} }并在web.xml中配置filter filter-nameCorsFilter/filter-name filter-classcom.lin.filter.CorsFilter/filter-class /filter filter-mapping filter-nameCorsFilter/filter-name url-pattern/*/url-pattern /filter-mapping