SSM处理 No 'Access-Control-Allow-Origin' header is present on the requested resource 问题

In development, front-end back-end call colleagues colleagues write interface, the address is valid, but in ajax project, the browser will report "No 'Access-Control-Allow-Origin' header is present on the requested resource "error.

This is because the browser is preventing ajax request resources outside the local solution is as follows:

Colleagues back-end increase @CrossOrign annotation on the class Controller layer, the current files on all interfaces can be called.

import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@CrossOrigin
@RestController
@RequestMapping("test")
public class TestController {

@RequestMapping("/one")
public Object one(HttpServletRequest request){
System.out.println("请求成功");
return "请求成功";
}


....

}