尝试使用一个请求上传多个图片，但只上传第一张图片。
这是java代码：
protected String doInBackground(String... args) {
String end = "\r\n";
String twoHyphens = "--";
String boundary = "******";
String result = "Ein Fehler ist aufgetreten";
String charset = "UTF-8";
String insertedReportID;
try
{
insertedReportID = args[0];
/* BEGIN - ADD LOGIN CREDENTIALS TO THE QUERY */
final String authKeyMail = "authMail";
final String authKeyPW = "authPW";
Context mContext = getContext();
SharedPreferences mPrefs = mContext.getSharedPreferences("privPrefs", Context.MODE_PRIVATE);
String email = mPrefs.getString(authKeyMail, "default");
String pw = mPrefs.getString(authKeyPW,"default");
HashMap<String, String> params = new HashMap<>();
params.put("emailadr", email);
params.put("passwrt", pw);
StringBuilder sbParams = new StringBuilder();
int i = 0;
for (String key : params.keySet()) {
try {
if (i != 0){
sbParams.append("&");
}
sbParams.append(key).append("=")
.append(URLEncoder.encode(params.get(key), charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
i++;
}
/* END - ADD LOGIN CREDENTIALS TO THE QUERY */
URL url = new URL(UPLOAD_URL);
HttpURLConnection httpURLConnection = (HttpURLConnection) url
.openConnection();
// allow input and output
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
httpURLConnection.setUseCaches(false);
// use POST way
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
httpURLConnection.setRequestProperty("Charset", "UTF-8");
httpURLConnection.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
DataOutputStream dos = new DataOutputStream(
httpURLConnection.getOutputStream());
//BEGIN - ADD LOGIN CREDENTIALS TO THE UPLOADER
dos.writeBytes(twoHyphens + boundary + end);
//"emailadr" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['emailadr']
dos.writeBytes("Content-Disposition: form-data; name=\"emailadr\""+ end);
dos.writeBytes(end);
dos.writeBytes(email);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//"passwrt" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['passwrt']
dos.writeBytes("Content-Disposition: form-data; name=\"passwrt\""+ end);
dos.writeBytes(end);
dos.writeBytes(pw);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//END - ADD LOGIN CREDENTIALS TO THE UPLOADER
//"playgroundID" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['equipmentID']
dos.writeBytes("Content-Disposition: form-data; name=\"reportID\""+ end);
dos.writeBytes(end);
dos.writeBytes(insertedReportID);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//END - ADD LOGIN CREDENTIALS TO THE UPLOADER
//"playgroundID" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['equipmentID']
dos.writeBytes("Content-Disposition: form-data; name=\"imageCounter\""+ end);
dos.writeBytes(end);
dos.writeBytes(String.valueOf(uploadImages.size()));
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//END - ADD LOGIN CREDENTIALS TO THE UPLOADER
for(int j=0;j<uploadImages.size();j++){
//"image_file" MUST BE THE EXACT SAME NAME AS IN PHP $_FILES['image_file']
dos.writeBytes("Content-Disposition: form-data; name=\"image_file"+String.valueOf(j)+"\"; filename=\""
+ uploadImages.get(j).substring(uploadImages.get(j).lastIndexOf("/") + 1)
+ "\""
+ end);
dos.writeBytes(end);
FileInputStream fis = new FileInputStream(uploadImages.get(j));
byte[] buffer = new byte[8192]; // 8k
int count = 0;
while ((count = fis.read(buffer)) != -1)
{
dos.write(buffer, 0, count);
}
fis.close();
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
Log.d("asdasd", "image_file"+uploadImages.get(j));
}
dos.flush();
InputStream is = httpURLConnection.getInputStream();
InputStreamReader isr = new InputStreamReader(is, "utf-8");
BufferedReader br = new BufferedReader(isr);
result = br.readLine();
dos.close();
is.close();
httpURLConnection.disconnect();
} catch (Exception e)
{
e.printStackTrace();
}
return result;
}
Php Code Snippet：
if (isset($_POST)) {
$imageCounter = $_POST['imageCounter'];
for ($i = 0; $i < $imageCounter; $i++) {
if ($_POST['reportID'] == "") {
die('Hier ist etwas schiefgelaufen (Code 100)');
}
// check $_FILES['ImageFile'] not empty
if (!isset($_FILES['image_file'.$i]) || !is_uploaded_file($_FILES['image_file'.$i]['tmp_name'])) {
die('Image file is Missing!'); // output error when above checks fail.
}
//get uploaded file info before we proceed
$image_name = $_FILES['image_file'.$i]['name']; //file name
$image_size = $_FILES['image_file'.$i]['size']; //file size
$image_temp = $_FILES['image_file'.$i]['tmp_name']; //file temp
$image_size_info = getimagesize($image_temp); //gets image size info from valid image file
现在的问题是只上传了第一张图片并输入了数据库。
我认为双方都有问题（Java / Php）。 首先使用java，因为我只能在php端接收一个图像。
我也使用这样的形式使用ajax：
<form action="../php/ajax/views/reports/uploadReportImages.php" method="post" enctype="multipart/form-data" id="MyUploadForm">
<div class="form-group">
<span id="durchsuchenBtn" class="btn btn-info btn-file">
<i class="fa fa-search fa-fw"></i> Durchsuchen <input name="image_file[]" id="imageInput" type="file" multiple="true">
</span>
</div>
</form>
现在我不确定如何将name="image_file[]" id="imageInput" type="file" multiple="true"从html表单翻译成java，这样我就可以将保存在“uploadImages”-String-ArrayList中的图像发送到php脚本。
任何建议/帮助都会非常好。
作为一点补充，我不想使用任何库来处理上传过程......
我认为一切都很好，除了它只添加一个文件所以错误必须在这里：
for(int j=0;j<uploadImages.size();j++){
//"image_file" MUST BE THE EXACT SAME NAME AS IN PHP $_FILES['image_file']
dos.writeBytes("Content-Disposition: form-data; name=\"image_file"+String.valueOf(j)+"\"; filename=\""
+ uploadImages.get(j).substring(uploadImages.get(j).lastIndexOf("/") + 1)
+ "\""
+ end);
dos.writeBytes(end);
FileInputStream fis = new FileInputStream(uploadImages.get(j));
byte[] buffer = new byte[8192]; // 8k
int count = 0;
while ((count = fis.read(buffer)) != -1)
{
dos.write(buffer, 0, count);
}
fis.close();
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
Log.d("asdasd", "image_file"+uploadImages.get(j));
}
答案 0 :(得分：0)
好吧它没有用，因为我排错了这句话：
protected String doInBackground(String... args) {
String end = "\r\n";
String twoHyphens = "--";
String boundary = "******";
String result = "Ein Fehler ist aufgetreten";
String charset = "UTF-8";
String insertedReportID;
try
{
insertedReportID = args[0];
/* BEGIN - ADD LOGIN CREDENTIALS TO THE QUERY */
final String authKeyMail = "authMail";
final String authKeyPW = "authPW";
Context mContext = getContext();
SharedPreferences mPrefs = mContext.getSharedPreferences("privPrefs", Context.MODE_PRIVATE);
String email = mPrefs.getString(authKeyMail, "default");
String pw = mPrefs.getString(authKeyPW,"default");
HashMap<String, String> params = new HashMap<>();
params.put("emailadr", email);
params.put("passwrt", pw);
StringBuilder sbParams = new StringBuilder();
int i = 0;
for (String key : params.keySet()) {
try {
if (i != 0){
sbParams.append("&");
}
sbParams.append(key).append("=")
.append(URLEncoder.encode(params.get(key), charset));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
i++;
}
/* END - ADD LOGIN CREDENTIALS TO THE QUERY */
URL url = new URL(UPLOAD_URL);
HttpURLConnection httpURLConnection = (HttpURLConnection) url
.openConnection();
// allow input and output
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
httpURLConnection.setUseCaches(false);
// use POST way
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
httpURLConnection.setRequestProperty("Charset", "UTF-8");
httpURLConnection.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
DataOutputStream dos = new DataOutputStream(
httpURLConnection.getOutputStream());
//BEGIN - ADD LOGIN CREDENTIALS TO THE UPLOADER
dos.writeBytes(twoHyphens + boundary + end);
//"emailadr" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['emailadr']
dos.writeBytes("Content-Disposition: form-data; name=\"emailadr\""+ end);
dos.writeBytes(end);
dos.writeBytes(email);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//"passwrt" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['passwrt']
dos.writeBytes("Content-Disposition: form-data; name=\"passwrt\""+ end);
dos.writeBytes(end);
dos.writeBytes(pw);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//END - ADD LOGIN CREDENTIALS TO THE UPLOADER
//"playgroundID" MUST BE THE EXACT SAME NAME AS IN PHP $_POST['equipmentID']
dos.writeBytes("Content-Disposition: form-data; name=\"reportID\""+ end);
dos.writeBytes(end);
dos.writeBytes(insertedReportID);
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
//END - ADD LOGIN CREDENTIALS TO THE UPLOADER
for(int j=0;j<uploadImages.size();j++){
//"image_file" MUST BE THE EXACT SAME NAME AS IN PHP $_FILES['image_file']
dos.writeBytes("Content-Disposition: form-data; name=\"image_file[]\"; filename=\""
+ uploadImages.get(j).substring(uploadImages.get(j).lastIndexOf("/") + 1)
+ "\""
+ end);
dos.writeBytes(end);
FileInputStream fis = new FileInputStream(uploadImages.get(j));
byte[] buffer = new byte[8192]; // 8k
int count = 0;
while ((count = fis.read(buffer)) != -1)
{
dos.write(buffer, 0, count);
}
fis.close();
dos.writeBytes(end);
dos.writeBytes(twoHyphens + boundary + end);
}
dos.close();
InputStream is = httpURLConnection.getInputStream();
InputStreamReader isr = new InputStreamReader(is, "utf-8");
BufferedReader br = new BufferedReader(isr);
result = br.readLine();
is.close();
httpURLConnection.disconnect();
} catch (Exception e)
{
e.printStackTrace();
}
return result;
}
这是我正在使用的java代码：
Ehcache caching with spring