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[英]How can my Servlet receive parameters from a multipart/form-data form?
[英]How to pass input value from multipart/form-data in jsp to servlet?
我知道這可能是一個重復的問題,我在互聯網上讀過類似的文章,但是我無法將輸入值從jsp發送到servlet。 我可以上傳文件,但是我需要發送輸入值。 Servlet:
try {
FileItemIterator iterator = upload.getItemIterator(req);
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
InputStream in = item.openStream();
if (item.isFormField()) {
out.println("Got a form field: " + item.getFieldName());
} else {
String fieldName = item.getFieldName();
String fileName = item.getName();
String contentType = item.getContentType();
String fileNameWithOutExt = FilenameUtils.removeExtension(fileName);
out.println("--------------");
out.println("fileName = " + fileName);
out.println("Kind = " + fileNameWithOutExt);
out.println("field name = " + fieldName);
out.println("contentType = " + contentType);
String fileContents = null;
try {
fileContents = IOUtils.toString(in);
out.println("lenght: " + fileContents.length());
String[] content = fileContents.split("\n");
String[] property = content[0].split(",");
out.println("lunghezza " + property.length);
for (String propr : property) {
out.println("prop: " + propr);
}
//out.println(Arrays.toString(property));
//out.println(fileContents);
} finally {
IOUtils.closeQuietly(in);
}
}
}
} catch (SizeLimitExceededException e) {
out.println("You exceeded the maximu size ("
+ e.getPermittedSize() + ") of the file ("
+ e.getActualSize() + ")");
}
} catch (Exception ex) {
throw new ServletException(ex);
}
}
那就是我的jsp
<form action="/upload_kind" method="post" enctype="multipart/form-data" >
<input type="file" name="file" size="50" />
<input type="text" name="namespace" id="namespace">
<br />
<input type="submit" value="Upload File" />
</form>
我讀到有關“ item.getString()”方法的信息,但它在DiskFileItem類中,而不在FileItemStream中,因此我可以看到發送了“命名空間”,但看不到它的值。 謝謝,我英語不好
通過重復的鏈接,我能夠解決我的問題。 我使用以下代碼:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
for (FileItem item : items) {
if (item.isFormField()) {
// Process regular form field (input type="text|radio|checkbox|etc", select, etc).
String fieldName = item.getFieldName();
String fieldValue = item.getString();
// ... (do your job here)
} else {
// Process form file field (input type="file").
String fieldName = item.getFieldName();
String fileName = FilenameUtils.getName(item.getName());
InputStream fileContent = item.getInputStream();
// ... (do your job here)
}
}
} catch (FileUploadException e) {
throw new ServletException("Cannot parse multipart request.", e);
}
// ...
}
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