When jsp sends data value, java receives it.

    $.ajax({
    url: "login",
    type: 'post',
    data:  JSON.stringify(<%=json%>),
    contentType: 'application/json',
    dataType: 'json'
    });

So it works fine in Java. Now I want to send this to TypeScript.

    @PostMapping("/login")
    public ResponseEntity<?> login(@RequestBody JwtAuthenticationRequest authRequest) {
    authRequest.setPassword(authRequest.getPassword());
    authRequest.setUsername(authRequest.getLoginid());
    
    try {
    UsernamePasswordAuthenticationToken authToken = new UsernamePasswordAuthenticationToken(
    authRequest.getUsername(),
    authRequest.getPassword()
    );
    
    authToken.setDetails(authRequest.getSecurebox());
    Authentication authentication = authenticationManager.authenticate(authToken);
    AuthUser authUser = (AuthUser) authentication.getPrincipal();
    String accessToken = jwtTokenProvider.createToken(authUser);
    String deviceId = authRequest.getDeviceId();
    
    if (deviceId == null) {
    deviceId = refreshTokenService.createDeviceId();
    System.out.println("deviceId"+deviceId);
    }
    String refreshToken = refreshTokenService.createRefreshToken(authUser.getUsername(), deviceId);
    Map<Object, Object> model = new HashMap<>();
    model.put("user", authUser);
    model.put("device_id", deviceId);
    model.put("token", accessToken);
    model.put("refresh_token", refreshToken);
    System.out.println(">>>>>model : "+model);
    return ok(model);
    } catch (AuthenticationException e) {
    throw new BadCredentialsException("ID or Password is incorrect.");
    }
    }

In the past, when TypeScript made a request to axios and sent data, it was received and sent in Java.

But now things have changed and I want to send data from jsp to java and then send it back to typescript.

    function adminlogin(username: String, password: String): Promise<any> {
    const deviceId = localStorage.getItem('deviceId');
    return axios.post<any>('/login', {
    username: username,
    password: password,
    deviceId: deviceId
    }).then((response) => {
    const user: AuthUser = response.data['user'] as AuthUser;
    const deviceId: string = response.data['device_id'] as string;
    const token: string = response.data['token'] as string;
    const refreshToken: string = response.data['refresh_token'] as string;
    
    // store user details and jwt token in local storage to keep user logged in between page refreshes
    localStorage.setItem('currentUser', JSON.stringify(user));
    localStorage.setItem('deviceId', deviceId);
    localStorage.setItem('token', token);
    localStorage.setItem('refreshToken', refreshToken);
    
    authenticationService.currentUser = user;
    return user;
    });
    }

I don’t know how to give a return value in Java.

And I don’t know how to receive the return value from TypeScript.

I don’t know what to do in this case.