android中如何上传图片到FTP服务器

android中如何上传图片到FTP服务器,第1张

android客户端实现FTP文件需要用到 commons-net-3.0.1.jar

先将jar包复制到android libs目录下

复制以下实现代码

以下为实现代码:

/**

* 通过ftp上传文件

* @param url ftp服务器地址 如:

* @param port 端口如 :

* @param username 登录名

* @param password 密码

* @param remotePath 上到ftp服务器的磁盘路径

* @param fileNamePath 要上传的文件路径

* @param fileName 要上传的文件名

* @return

*/

public String ftpUpload(String url, String port, String username,String password, String remotePath, String fileNamePath,String fileName) {

FTPClient ftpClient = new FTPClient()

FileInputStream fis = null

String returnMessage = "0"

try {

ftpClient.connect(url, Integer.parseInt(port))

boolean loginResult = ftpClient.login(username, password)

int returnCode = ftpClient.getReplyCode()

if (loginResult &&FTPReply.isPositiveCompletion(returnCode)) {// 如果登录成功

ftpClient.makeDirectory(remotePath)

// 设置上传目录

ftpClient.changeWorkingDirectory(remotePath)

ftpClient.setBufferSize(1024)

ftpClient.setControlEncoding("UTF-8")

ftpClient.enterLocalPassiveMode()

fis = new FileInputStream(fileNamePath + fileName)

ftpClient.storeFile(fileName, fis)

returnMessage = "1" //上传成功

} else {// 如果登录失败

returnMessage = "0"

}

} catch (IOException e) {

e.printStackTrace()

throw new RuntimeException("FTP客户端出错!", e)

} finally {

//IOUtils.closeQuietly(fis)

try {

ftpClient.disconnect()

} catch (IOException e) {

e.printStackTrace()

throw new RuntimeException("关闭FTP连接发生异常!", e)

}

}

return returnMessage

}

界面很简单,点击 【选择图片】,从图库里选择图片,显示到下面的imageview里,点击上传,就会上传到指定的服务器

布局文件:

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<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<Button

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="选择图片"

android:id="@+id/selectImage"

/>

<Button

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="上传图片"

android:id="@+id/uploadImage"

/>

<ImageView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:id="@+id/imageView"

/>

</LinearLayout>

Upload Activity:

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public class Upload extends Activity implements OnClickListener {

private static String requestURL = "http://192.168.1.212:8011/pd/upload/fileUpload.do"

private Button selectImage, uploadImage

private ImageView imageView

private String picPath = null

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState)

setContentView(R.layout.upload)

selectImage = (Button) this.findViewById(R.id.selectImage)

uploadImage = (Button) this.findViewById(R.id.uploadImage)

selectImage.setOnClickListener(this)

uploadImage.setOnClickListener(this)

imageView = (ImageView) this.findViewById(R.id.imageView)

}

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.selectImage:

/***

* 这个是调用android内置的intent,来过滤图片文件 ,同时也可以过滤其他的

*/

Intent intent = new Intent()

intent.setType("image/*")

intent.setAction(Intent.ACTION_GET_CONTENT)

startActivityForResult(intent, 1)

break

case R.id.uploadImage:

if (picPath == null) {

Toast.makeText(Upload.this, "请选择图片!", 1000).show()

} else {

final File file = new File(picPath)

if (file != null) {

String request = UploadUtil.uploadFile(file, requestURL)

uploadImage.setText(request)

}

}

break

default:

break

}

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (resultCode == Activity.RESULT_OK) {

/**

* 当选择的图片不为空的话,在获取到图片的途径

*/

Uri uri = data.getData()

Log.e(TAG, "uri = " + uri)

try {

String[] pojo = { MediaStore.Images.Media.DATA }

Cursor cursor = managedQuery(uri, pojo, null, null, null)

if (cursor != null) {

ContentResolver cr = this.getContentResolver()

int colunm_index = cursor

.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)

cursor.moveToFirst()

String path = cursor.getString(colunm_index)

/***

* 这里加这样一个判断主要是为了第三方的软件选择,比如:使用第三方的文件管理器的话,你选择的文件就不一定是图片了,

* 这样的话,我们判断文件的后缀名 如果是图片格式的话,那么才可以

*/

if (path.endsWith("jpg") || path.endsWith("png")) {

picPath = path

Bitmap bitmap = BitmapFactory.decodeStream(cr

.openInputStream(uri))

imageView.setImageBitmap(bitmap)

} else {

alert()

}

} else {

alert()

}

} catch (Exception e) {

}

}

super.onActivityResult(requestCode, resultCode, data)

}

private void alert() {

Dialog dialog = new AlertDialog.Builder(this).setTitle("提示")

.setMessage("您选择的不是有效的图片")

.setPositiveButton("确定", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

picPath = null

}

}).create()

dialog.show()

}

}

这个才是重点 UploadUtil:

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public class UploadUtil {

private static final String TAG = "uploadFile"

private static final int TIME_OUT = 10 * 1000// 超时时间

private static final String CHARSET = "utf-8"// 设置编码

/**

* 上传文件到服务器

* @param file 需要上传的文件

* @param RequestURL 请求的rul

* @return 返回响应的内容

*/

public static int uploadFile(File file, String RequestURL) {

int res=0

String result = null

String BOUNDARY = UUID.randomUUID().toString()// 边界标识 随机生成

String PREFIX = "--", LINE_END = "\r\n"

String CONTENT_TYPE = "multipart/form-data"// 内容类型

try {

URL url = new URL(RequestURL)

HttpURLConnection conn = (HttpURLConnection) url.openConnection()

conn.setReadTimeout(TIME_OUT)

conn.setConnectTimeout(TIME_OUT)

conn.setDoInput(true)// 允许输入流

conn.setDoOutput(true)// 允许输出流

conn.setUseCaches(false)// 不允许使用缓存

conn.setRequestMethod("POST")// 请求方式

conn.setRequestProperty("Charset", CHARSET)// 设置编码

conn.setRequestProperty("connection", "keep-alive")

conn.setRequestProperty("Content-Type", CONTENT_TYPE + "boundary="+ BOUNDARY)

if (file != null) {

/**

* 当文件不为空时执行上传

*/

DataOutputStream dos = new DataOutputStream(conn.getOutputStream())

StringBuffer sb = new StringBuffer()

sb.append(PREFIX)

sb.append(BOUNDARY)

sb.append(LINE_END)

/**

* 这里重点注意: name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件

* filename是文件的名字,包含后缀名

*/

sb.append("Content-Disposition: form-dataname=\"file\"filename=\""

+ file.getName() + "\"" + LINE_END)

sb.append("Content-Type: application/octet-streamcharset="

+ CHARSET + LINE_END)

sb.append(LINE_END)

dos.write(sb.toString().getBytes())

InputStream is = new FileInputStream(file)

byte[] bytes = new byte[1024]

int len = 0

while ((len = is.read(bytes)) != -1) {

dos.write(bytes, 0, len)

}

is.close()

dos.write(LINE_END.getBytes())

byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)

.getBytes()

dos.write(end_data)

dos.flush()

/**

* 获取响应码 200=成功 当响应成功,获取响应的流

*/

res = conn.getResponseCode()

Log.e(TAG, "response code:" + res)

if (res == 200) {

Log.e(TAG, "request success")

InputStream input = conn.getInputStream()

StringBuffer sb1 = new StringBuffer()

int ss

while ((ss = input.read()) != -1) {

sb1.append((char) ss)

}

result = sb1.toString()

Log.e(TAG, "result : " + result)

} else {

Log.e(TAG, "request error")

}

}

} catch (MalformedURLException e) {

e.printStackTrace()

} catch (IOException e) {

e.printStackTrace()

}

return res

}

}

有两种方法,第一,把你的图片转成字节流,然后用post方法把字节流传到服务端,然后服务端接收到字节流之后,开启一个线程把它重新压缩成图片,保存在某个文件夹下面。

第二,开启一个线程,用socket直接把图片放到stream中传到服务端,服务端接收后保存到文件夹下。


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原文地址:https://www.xiayuyun.com/zonghe/457191.html

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