https://blog.csdn.net/Zhang_Xinbin/article/details/54140914
其实也就是设置后台允许进行跨域访问,就好比权限一样,进行对外开放的形式,下面是后台代码,前端直接调用接口即可
@RequestMapping(value = "queryStatus.do",method = RequestMethod.POST)
@ResponseBody
public ServiceResponse queryStatus(@RequestParam(value = "status") Integer status,
HttpServletRequest request, HttpServletResponse response) {
response.setHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept");
response.addHeader("Access-Control-Allow-Origin", "*" ); //可以访问此域资源的域。*为所有
response.addHeader( "Access-Control-Allow-Methods", "POST" ); //可以访问此域的脚本方法类型
response.addHeader( "Access-Control-Max-Age", "1000" );
return iQrCodeService.queryStatus(status);
}