https://www.cnblogs.com/caimuqing/p/6733405.html
// TODO 支持跨域访问
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Allow-Headers", "Content-Type,Access-Token");
response.setHeader("Access-Control-Expose-Headers", "*"); if (request.getMethod().equals("OPTIONS")) {
HttpUtil.setResponse(response, HttpStatus.OK.value(), null);
return;
}
