FTP连接的java [英] FTP connection java
问题描述
我想将文件上传到服务器。有什么办法通过FTP上传文件到服务器?
我写了这个类:
serverconnect.java:
进口java.io.IOException异常;
进口java.net.SocketException异常;
进口org.apache.commons.net.SocketClient;
进口org.apache.commons.net.ftp.FTPClient;
公共类serverconnection
{
公共FtpClient的connectftp()
{
FtpClient的FTP = NULL;
尝试 {
ftp.connect(ftp://ftp.drivehq.com/);
ftp.login(zule,*****);
// ftp.changeWorkingDirectory(/公用);
// ftp.makeDirectory(200);
}赶上(SocketException EN){
// TODO自动生成的catch块
en.printStackTrace();
}赶上(IOException异常E){
// TODO自动生成的catch块
e.printStackTrace();
}
返回FTP;
}
}
这是mainActivity(只有相关的code):
进口android.view.View;
进口android.view.View.OnClickListener;
进口android.os.Bundle;
进口android.app.Activity;
进口android.content.Intent;
进口android.view.Menu;
进口android.widget.Button;
进口android.widget.TextView;
进口java.io.IOException异常;
进口java.net.SocketException异常;
进口org.apache.commons.net.ftp.FTPClient;
公共类MainActivity扩展活动实现OnClickListener {
按钮扫描;
字符串内容;
字符串格式;
TextView的contentstext;
TextView的formattext;
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
// ---------------------- FTP -------------
serverconnection ftpconnect =新serverconnection();
FtpClient的FTP = ftpconnect.connectftp();
扫描=(按钮)findViewById(R.id.scanbutton);
.....
,当我在我的手机上安装应用程序我得到一个错误:unfortanly您的应用程序必须STOPP ......
新的code:
公共类MainActivity扩展活动实现OnClickListener {
按钮扫描;
字符串内容;
字符串格式;
TextView的contentstext;
TextView的formattext;
@覆盖
公共无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.activity_main);
// ---------------------- FTP -------------
// serverconnection ftpconnect =新serverconnection();
// SimpleFTP的ftp = ftpconnect.connectftp();
SimpleFTP FTP =新SimpleFTP();
尝试 {
ftp.connect(market.bugs3.com,21,u884282808,lionetwork1);
}赶上(IOException异常E){
// TODO自动生成的catch块
e.printStackTrace();
}
新logcat的:
09-16 13:43:31.131:E / AndroidRuntime(1203):致命异常:主要
09-16 13:43:31.131:E / AndroidRuntime(1203):java.lang.RuntimeException的:无法启动的活动ComponentInfo {com.example.market/com.example.market.MainActivity}:android.os.NetworkOnMainThreadException
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread.access $ 600(ActivityThread.java:123)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1147)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.os.Handler.dispatchMessage(Handler.java:99)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.os.Looper.loop(Looper.java:137)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread.main(ActivityThread.java:4424)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.lang.reflect.Method.invokeNative(本机方法)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.lang.reflect.Method.invoke(Method.java:511)
09-16 13:43:31.131:E / AndroidRuntime(1203):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:784)
09-16 13:43:31.131:E / AndroidRuntime(1203):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-16 13:43:31.131:E / AndroidRuntime(1203):在dalvik.system.NativeStart.main(本机方法)
09-16 13:43:31.131:E / AndroidRuntime(1203):由:android.os.NetworkOnMainThreadException
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.InetAddress.lookupHostByName(InetAddress.java:391)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.InetAddress.getAllByName(InetAddress.java:220)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.Socket.tryAllAddresses(Socket.java:108)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.Socket中的< INIT>(Socket.java:177)
09-16 13:43:31.131:E / AndroidRuntime(1203):在java.net.Socket中的< INIT>(Socket.java:149)
09-16 13:43:31.131:E / AndroidRuntime(1203):在org.jibble.simpleftp.SimpleFTP.connect(SimpleFTP.java:68)
09-16 13:43:31.131:E / AndroidRuntime(1203):在com.example.market.MainActivity.onCreate(MainActivity.java:31)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.Activity.performCreate(Activity.java:4465)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
09-16 13:43:31.131:E / AndroidRuntime(1203):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
09-16 13:43:31.131:E / AndroidRuntime(1203):11 ...更多
现在的问题是,你试图让你的主线程网络电话的事实。这是不允许在Android 3.0或更高版本。
您应该通过调用不同的线程FTP服务器解决这个问题。一个好办法做到这一点是使用AsyncTask的:
私有类FtpTask扩展的AsyncTask<虚空,虚空,FtpClient的> {
保护FtpClient的doInBackground(无效参数... args){
serverconnection ftpconnect =新serverconnection();
FtpClient的FTP = ftpconnect.connectftp();
返回FTP;
}
保护无效onPostExecute(FtpClient的结果){
Log.v(FTPTask,FTP连接完成);
FtpClient的=结果;
//凡FtpClient的是,在主要活动一个实例变量
}
}
然后你可以用下面的code在主线程中运行这个后台线程:
新FtpTask()执行()。
编辑:
如果你想在不同的方法之间传递参数,你可以改变
的AsyncTask<虚空,虚空,虚空>
超类的初始化。
例如的AsyncTask<字符串,双,整数GT;
将有可能通过一个字符串变量来doInBackground方法,采用双跟踪进度和使用整数作为结果类型(结果类型为doInBackground的返回类型,其将被发送到onPostExecute作为一个参数)。
I'm trying to upload the file to a server. What is the way for uploading a file to a server through FTP?
i wrote this class:
serverconnect.java:
import java.io.IOException;
import java.net.SocketException;
import org.apache.commons.net.SocketClient;
import org.apache.commons.net.ftp.FTPClient;
public class serverconnection
{
public FTPClient connectftp()
{
FTPClient ftp = null;
try {
ftp.connect("ftp://ftp.drivehq.com/");
ftp.login("zule", "*****");
// ftp.changeWorkingDirectory("/public");
// ftp.makeDirectory("200");
} catch (SocketException en) {
// TODO Auto-generated catch block
en.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return ftp;
}
}
and this is the mainActivity ( only the relevant code):
import android.view.View;
import android.view.View.OnClickListener;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.Button;
import android.widget.TextView;
import java.io.IOException;
import java.net.SocketException;
import org.apache.commons.net.ftp.FTPClient;
public class MainActivity extends Activity implements OnClickListener {
Button scan;
String contents;
String format;
TextView contentstext;
TextView formattext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//----------------------FTP-------------
serverconnection ftpconnect =new serverconnection();
FTPClient ftp=ftpconnect.connectftp();
scan=(Button)findViewById(R.id.scanbutton);
.....
and when i install the app on my phone i get an error: "unfortanly your app must stopp..."
the new code:
public class MainActivity extends Activity implements OnClickListener {
Button scan;
String contents;
String format;
TextView contentstext;
TextView formattext;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//----------------------FTP-------------
//serverconnection ftpconnect =new serverconnection();
//SimpleFTP ftp=ftpconnect.connectftp();
SimpleFTP ftp = new SimpleFTP();
try {
ftp.connect("market.bugs3.com", 21, "u884282808", "lionetwork1");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
the new logcat:
09-16 13:43:31.131: E/AndroidRuntime(1203): FATAL EXCEPTION: main
09-16 13:43:31.131: E/AndroidRuntime(1203): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.market/com.example.market.MainActivity}: android.os.NetworkOnMainThreadException
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread.access$600(ActivityThread.java:123)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.os.Handler.dispatchMessage(Handler.java:99)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.os.Looper.loop(Looper.java:137)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread.main(ActivityThread.java:4424)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.lang.reflect.Method.invokeNative(Native Method)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.lang.reflect.Method.invoke(Method.java:511)
09-16 13:43:31.131: E/AndroidRuntime(1203): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
09-16 13:43:31.131: E/AndroidRuntime(1203): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
09-16 13:43:31.131: E/AndroidRuntime(1203): at dalvik.system.NativeStart.main(Native Method)
09-16 13:43:31.131: E/AndroidRuntime(1203): Caused by: android.os.NetworkOnMainThreadException
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.InetAddress.getAllByName(InetAddress.java:220)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.Socket.tryAllAddresses(Socket.java:108)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.Socket.<init>(Socket.java:177)
09-16 13:43:31.131: E/AndroidRuntime(1203): at java.net.Socket.<init>(Socket.java:149)
09-16 13:43:31.131: E/AndroidRuntime(1203): at org.jibble.simpleftp.SimpleFTP.connect(SimpleFTP.java:68)
09-16 13:43:31.131: E/AndroidRuntime(1203): at com.example.market.MainActivity.onCreate(MainActivity.java:31)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.Activity.performCreate(Activity.java:4465)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
09-16 13:43:31.131: E/AndroidRuntime(1203): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
09-16 13:43:31.131: E/AndroidRuntime(1203): ... 11 more
The problem is the fact that you're trying to make a network call on your main thread. Which is not allowed on Android 3.0 or higher.
You should solve this by calling the FTP server on a different thread. A good way to do this is to use AsyncTask:
private class FtpTask extends AsyncTask<Void, Void, FTPClient> {
protected FTPClient doInBackground(Void... args) {
serverconnection ftpconnect =new serverconnection();
FTPClient ftp=ftpconnect.connectftp();
return ftp;
}
protected void onPostExecute(FTPClient result) {
Log.v("FTPTask","FTP connection complete");
ftpClient = result;
//Where ftpClient is a instance variable in the main activity
}
}
Then you can run this background thread using the following code in the main thread:
new FtpTask().execute();
EDIT:
If you want to pass parameters between the different methods, you can change the
AsyncTask<Void, Void, Void>
superclass initialization.
For example AsyncTask<String, Double, Integer>
will make it possible to pass a String variable to the doInBackground method, keep track of progress using a double and use a integer as the result type(the result type is the return type of doInBackground, which will be sent to onPostExecute as a parameter).
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