Question

紧急：我想使用php将我的android应用程序连接到mysql

但是当我运行代码时，它给了我异常java.io.FileNotFoundException

每当我通过邮递员运行http://192.168.XX.X:8080/login.php时，都会说 “禁止您无权访问此服务器上的/login.php” 但是只要我运行http://localhost:8080/login.php，它就可以正常运行

“ MainActivity.java”

public class MainActivity extends AppCompatActivity {
Button btn;
EditText username,password;
String type="Login";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btn=findViewById(R.id.mLogin);
    username=findViewById(R.id.mUser);
    password=findViewById(R.id.mPass);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String Username=username.getText().toString();
            String Password=password.getText().toString();
            BackgroundWorker bw=new 
BackgroundWorker(getApplicationContext());
            bw.execute(type,Username,Password);
        }
    });
}
}

“ BackgroundWorker.java”

public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
//    AlertDialog ad;
boolean b;
BackgroundWorker(Context context){
    this.context=context;
}

@Override
protected String doInBackground(String... strings) {
    String type=strings[0];
    String login_url="http://192.168.XX.X:8080/login.php";
    try {
        String user_name=strings[1];
        String password=strings[2];
        URL url=new URL(login_url);
        HttpURLConnection httpURLConnection= 
   (HttpURLConnection)url.openConnection();
        httpURLConnection.setRequestMethod("POST");
        httpURLConnection.setDoOutput(true);
        httpURLConnection.setDoInput(true);
        OutputStream outputStream =httpURLConnection.getOutputStream();
        BufferedWriter bw=new BufferedWriter(new 
    OutputStreamWriter(outputStream,"UTF-8"));
        String post_data= URLEncoder.encode("user_name","UTF- 
   8")+"="+URLEncoder.encode(user_name,"UTF-8")
                +"&"+URLEncoder.encode("password","UTF- 
   8")+"="+URLEncoder.encode(password,"UTF-8");
        bw.write(post_data);
        bw.flush();
        bw.close();
        InputStream inputStream=httpURLConnection.getInputStream();
        BufferedReader br=new BufferedReader(new 
InputStreamReader(inputStream,"iso-8859-1"));
        String result="";
        String line="";
        while((line=br.readLine())!=null)
        {
            result+=line;
        }
        System.out.println("here result=="+result);
        br.close();
        inputStream.close();
        httpURLConnection.disconnect();
        return result;
    }
    catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    if(type.equals("Login"))
    {

    }
    return null;
}

@Override
protected void onPreExecute() {
  //  ad=new AlertDialog.Builder(this.context).create();

//    ad.setTitle("Login Status");
}

@Override
protected void onPostExecute(String result) {
    System.out.println("result=="+result);
    if(result.equals("Login successful")){
        Toast.makeText(context,"Login success",Toast.LENGTH_SHORT).show();
    }else{
        Toast.makeText(context,"Login failure",Toast.LENGTH_SHORT).show();

    }
    //ad.setMessage(result);
    //ad.show();
}

@Override
protected void onProgressUpdate(Void... values) {
    super.onProgressUpdate(values);
}
}

您身边的任何帮助将不胜感激！

android -mysql连接使用php错误：java.io.FileNotFoundException

0 个答案: