我正在构建一个应用程序，在某个时刻我需要将图像上传到服务器。当我只将图像作为参数时，它一切都很完美，但问题是当我添加文本时，没有任何反应。这是我的代码
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);
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);
conn.setRequestProperty("username", username);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
+ fileName + "\"" + lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"username\";filename=\""
+ username + "\"" + lineEnd);
dos.writeBytes("Content-Type: text/plain;charset=UTF-8" + 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 = "http://phpserver"+ture;
Toast.makeText(Friend.this, "Uploaded succesfully",
Toast.LENGTH_SHORT).show();
//new Post_test().execute();
}
});
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
dialog.dismiss();
ex.printStackTrace();
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(Friend.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() {
Toast.makeText(Friend.this, "Got Exception : see logcat ",
Toast.LENGTH_SHORT).show();
}
});
Log.e("Upload file to server Exception", "Exception : "
+ e.getMessage(), e);
}
dialog.dismiss();
return serverResponseCode;
}
我究竟做错了什么？
当我删除：
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"username\";filename=\"" +
username + "\"" + lineEnd);
dos.writeBytes("Content-Type: text/plain;charset=UTF-8" + lineEnd);
图像上传，因此问题可能来自如何添加文本帖子。有帮助吗？
这对我有用!!我将来会把它调整到URLConnection ......
public int uploadFile(String sourceFileUri) {
String fileName=sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "------hellojosh";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(fileName);
Log.e("joshtag", "Uploading: sourcefileURI, "+fileName);
if (!sourceFile.isFile()) {
Log.e("uploadFile", "Source File not exist :"+appSingleton.getInstance().photouri);//FullPath);
runOnUiThread(new Runnable() {
public void run() {
//messageText.setText("Source File not exist :"
}
});
return 0; //RETURN #1
}
else{
try{
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
Log.v("joshtag",url.toString());
// 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 s
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("file", fileName);
conn.setRequestProperty("user", user_id));
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"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);
Log.i("joshtag","->");
}
// 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().toString();
Log.i("joshtag", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
// ------------------ read the SERVER RESPONSE
DataInputStream inStream;
try {
inStream = new DataInputStream(conn.getInputStream());
String str;
while ((str = inStream.readLine()) != null) {
Log.e("joshtag", "SOF Server Response" + str);
}
inStream.close();
}
catch (IOException ioex) {
Log.e("joshtag", "SOF error: " + ioex.getMessage(), ioex);
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
if(serverResponseCode == 200){
//Do something
}//END IF Response code 200
dialog.dismiss();
}//END TRY - FILE READ
catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("joshtag", "UL error: " + ex.getMessage(), ex);
} //CATCH - URL Exception
catch (Exception e) {
e.printStackTrace();
Log.e("Upload file to server Exception", "Exception : "+ e.getMessage(), e);
} //
return serverResponseCode; //after try
}//END ELSE, if file exists.
}
在搜索了大量资源之后我什么都没有，但是当我试图从$ _SERVER超级全局变量中获取文本数据时，我得到了所有文本数据和$ _FILE来获取图像。
package com.example.kingmash.Helper;
import android.content.Context;
import android.os.AsyncTask;
import android.os.StrictMode;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;
import com.example.kingmash.DAO.Profile_cover;
import com.example.kingmash.DAO.User_profile_cover;
import com.example.kingmash.MainActivity;
import com.example.kingmesh.R;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import static com.example.kingmash.Helper.AllRequest.responseMessage;
public class UploadFileOnlyAsync extends AsyncTask<String, Void, String> {
String sourceFileUri, serverResponseMessage;
int serverResponseCode;
ProgressBar progressBar;
User_profile_cover upc;
int isdatainserted;
Context context;
public UploadFileOnlyAsync(Context context, String sourceFileUri, boolean requireprgressbar, User_profile_cover upc) {
this.sourceFileUri = sourceFileUri;
this.context = context;
progressBar = null;
this.upc = upc;
if (requireprgressbar) {
// progressBar = ((AppCompatActivity) context).findViewById(R.id.progressbar);
}
}
@Override
protected void onPreExecute() {
Log.d("on pre----", "on pre-----------");
if (progressBar != null) {
progressBar.setVisibility(View.GONE);
progressBar.setVisibility(View.VISIBLE);
}
}
@Override
protected void onProgressUpdate(Void... values) {
Log.d("On update-------------", "" + values[0]);
if (progressBar != null) {
progressBar.setProgress(Integer.parseInt(values[0].toString()));
}
}
@Override
protected String doInBackground(String... params) {
responseMessage = new Profile_cover(context).insert(upc, Routes.insertStepsURL);
if (responseMessage.get(0).equals("Inserted")) {
Log.d("key------insert fata", "" + isdatainserted);
try {
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()) {
try {
String upLoadServerUri = Routes.update_prfile_covrer_URL;
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
// 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("user_id", "1");
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"profile\";filename=\""
+ sourceFileUri + "\"" + 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();
serverResponseMessage = conn
.getResponseMessage();
if (serverResponseCode == 200) {
// messageText.setText(msg);
//Toast.makeText(ctx, "File Upload Complete.",
// Toast.LENGTH_SHORT).show();
// recursiveDelete(mDirectory1);
}
// close the streams //
fileInputStream.close();
dos.flush();
dos.close();
String line;
ArrayList responseMessage = new ArrayList();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
while ((line = br.readLine()) != null) {
Log.d("line---", line);
responseMessage.add(line);
}
} catch (Exception e) {
// dialog.dismiss();
e.printStackTrace();
}
// dialog.dismiss();
} // End else block
} catch (Exception ex) {
// dialog.dismiss();
ex.printStackTrace();
}
}
Log.d("do in back-------------", "" + "Executed " + serverResponseMessage + "" + serverResponseCode + responseMessage);
return "Executed " + serverResponseMessage + "" + serverResponseCode + " " + responseMessage;
}
@Override
protected void onPostExecute(String result) {
if (progressBar != null) {
progressBar.setVisibility(View.GONE);
}
}
}
这是从$ _SERVER或getAllHeaders（）函数读取标题的php代码
<?php
session_start();
include '../Config/ConnectionObjectOriented.php';
include '../Config/DB.php';
$db = new DB($conn);
$user_id=$_SERVER["user_id"];
$info=$db->fileUploadWithTable($_FILES,"user_profile_cover",$user_id,"../img/user", "5m", "jpg,png");
echo $info[0];
echo $info[1];
// or you can check the detail by this code
foreach (getallheaders() as $name => $value) {
echo "$name: $value <br>";
}