5.31

//注册功能
Future<void> register(
    BuildContext context,
    String username,
    String password,
    String username2,
    String phoneNumber,
    String email)
async {
  try {
    Dio dio = Dio();
    String checkUrl = "http://192.168.211.14:9090/user/checkUserNameExistence?userName=$username";
    Response checkResponse = await dio.get(checkUrl);

    if (checkResponse.data) {
      // 用户名已存在，提示用户无法注册
      showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: Text('注册失败'),
            content: Text('用户名已存在，请选择其他用户名'),
            actions: <Widget>[
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop(); // 关闭对话框
                },
                child: Text('确定'),
              ),
            ],
          );
        },
      );
      return;
    }

    // 用户名不存在，可以进行注册
    String registerUrl = "http://192.168.211.14:9090/user";
    Map<String, dynamic> data = {
      "user_name": username,
      "user_password": password,
      "user_name2": username2,
      "user_phone": phoneNumber,
      "user_email": email
    };
    Response response = await dio.post(registerUrl, data: data);

    if (response.statusCode == 200) {
      // 注册成功
      showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: Text('注册成功'),
            actions: <Widget>[
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop(); // 关闭对话框
                  Navigator.of(context).pushReplacement( // 替换当前页面为登录页面
                    MaterialPageRoute(builder: (context) => LoginPage(key: UniqueKey())),
                  );
                },
                child: Text('确定'),
              ),
            ],
          );
        },
      );
    } else {
      // 注册失败
      showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: Text('注册失败'),
            content: Text('错误码: ${response.statusCode}'),
            actions: <Widget>[
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop();
                },
                child: Text('确定'),
              ),
            ],
          );
        },
      );
    }
  } catch (e) {
    // 请求过程中出现错误
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text('请求错误'),
          content: Text('$e'),
          actions: <Widget>[
            TextButton(
              onPressed: () {
                Navigator.of(context).pop();
              },
              child: Text('确定'),
            ),
          ],
        );
      },
    );
  }
}