解决axios发送post请求返回400状态码的问题

axios({
 method: "post",
 url: "http://localhost:8080/employee/testpost",
 data: {
  username: '234234',
  password: '4565'
 }
}).then((res) => {
 console.log(res.data);
})

@CrossOrigin
@PostMapping("/employee/testpost")
@ResponseBody
public Result testpost(@RequestParam(value = "username", required = true) String username,
     @RequestParam(value = "password", required = true) String password) {
 System.out.println(username + " , " + password);
 Result json = new Result();
 json.setResult(1);
 return json;
}

@CrossOrigin
@PostMapping("/employee/testpost")
@ResponseBody
public Result testget(@RequestBody Map map) {
 System.out.println(map.get("username") + " , " + map.get("password"));
 Result json = new Result();
 json.setResult(1);
 return json;
}