我正在尝试编写一个Android应用程序来获取用户图像并将其上传到服务器。我可以在手机上查看图像，但在从服务器复制文件时无法查看图像。我正在使用Apache commons库来进行FTP上传。显示文件，大小正确，但无法打开。
public static void uploadImage(Bitmap bitmap,String path)
{
String filePath="RENT/images/capture/TESTFILE.jpg";
try
{
FTPClient client = new FTPClient();
client.connect("MY IP");
client.login("USER", "PWD");
client.enterLocalPassiveMode();
Log.i("aaa","connected: "+client.isConnected());
Log.i("aaa","going to addr: "+client.getRemoteAddress());
FileInputStream fis = new FileInputStream(bitmapToFile(bitmap));
Log.i("aaa","2-starting to upload file");
client.storeFile(filePath, fis);
fis.close();
client.logout();
Log.i("aaa","3-file upload complete");
}
catch (IOException e) {
e.printStackTrace();
}
}
public static File bitmapToFile(Bitmap bitmap) throws IOException
{
File outputDir = con.getCacheDir();
File outputFile = File.createTempFile("testFile", ".jpg", outputDir);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.JPEG, 90, bos);
byte[] bitmapdata = bos.toByteArray();
//write the bytes in file
FileOutputStream fos = new FileOutputStream(outputFile);
fos.write(bitmapdata);
fos.flush();
fos.close();
return outputFile;
}
}
答案 0 :(得分：0)
我不知道确切的问题...可能是你的图像是PNG格式而你发送的是JPEG格式的问题......如果不是这样的话请检查这种方法......
public int uploadFile（String sourceFileUri）{
String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
dialog.dismiss();
Log.e("uploadFile", "Source File not exist :"
+uploadFilePath + "" + uploadFileName);
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Source File not exist :"
+uploadFilePath + "" + uploadFileName);
}
});
return 0;
}
else
{
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("uploaded_file", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
+ fileName + """ + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("uploadFile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
+" http://www.androidexample.com/media/uploads/"
+uploadFileName;
messageText.setText(msg);
Toast.makeText(UploadToServer.this, "File Upload Complete.",
Toast.LENGTH_SHORT).show();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("MalformedURLException Exception : check script url.");
Toast.makeText(UploadToServer.this, "MalformedURLException",
Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
dialog.dismiss();
e.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
messageText.setText("Got Exception : see logcat ");
Toast.makeText(UploadToServer.this, "Got Exception : see logcat ",
Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : "
+ e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
} // End else block
}
}
答案 1 :(得分：0)
我找到了解决方案。整个（工作）代码如下:(需要apache库）。
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.http.client.ClientProtocolException;
我在这个项目中使用了4.0.1版。
public static void uploadImage(String path)
{
FTPClient ftpClient = new FTPClient();
try {
ftpClient.connect("IP");
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
ftpClient.setFileTransferMode(FTP.STREAM_TRANSFER_MODE);
ftpClient.setSoTimeout(10000);
ftpClient.enterLocalPassiveMode();
if(ftpClient.login("USR", "PWD"))
{
Log.i("aaa","Path: "+path);
File sFile=new File(path);
if(!sFile.exists())
Log.i("aaa","file not exist");
FileInputStream fs= new FileInputStream(sFile);
String fileName = "xxx.jpg";
Boolean result = ftpClient.storeFile("RENT/images/capture/" + fileName, fs);
Log.i("aaa","result: "+result);
if(result)
new File(path).delete();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
我需要将ftpClient.fileType和ftpClient.setFileTransferMode都设置为二进制文件类型。