I have got some method from the stackoverflow about uploading file in spark java, but I try and did't work.
post("/upload",
(request, response) -> {
if (request.raw().getAttribute("org.eclipse.jetty.multipartConfig") == null) {
MultipartConfigElement multipartConfigElement = new MultipartConfigElement(System.getProperty("java.io.tmpdir"));
request.raw().setAttribute("org.eclipse.jetty.multipartConfig", multipartConfigElement);
}
Part file = request.raw().getPart("file");
Part name = request.raw().getPart("name");
String filename = file.getName();
if(name.getSize() > 0){
try{
filename = IOUtils.toString(name.getInputStream(), StandardCharsets.UTF_8);
} catch(Exception e){
e.printStackTrace();
}
}
Path filePath = Paths.get(".",filename);
Files.copy(file.getInputStream(),filePath);
return "Done!";
});
}
I use postman to send the message
And I got the Error like this
The error points to the code Part file = request.raw().getPart("file");
The Spark API accepts file uploads as a MIME upload in the same way your web browser would upload a file in a web form. The two most important aspects are 1) to name the field to which you send "files" and 2) to set your Content-Type header to be multipart/form-data including a boundary.
Spark is a compact framework for building web applications that run on the JVM. It comes with an embedded web server, Jetty, so you can get started in minutes.
Stopping the Server By calling the stop() method the server is stopped and all routes are cleared.
post("/upload", "multipart/form-data", (request, response) -> {
String location = "image"; // the directory location where files will be stored
long maxFileSize = 100000000; // the maximum size allowed for uploaded files
long maxRequestSize = 100000000; // the maximum size allowed for multipart/form-data requests
int fileSizeThreshold = 1024; // the size threshold after which files will be written to disk
MultipartConfigElement multipartConfigElement = new MultipartConfigElement(
location, maxFileSize, maxRequestSize, fileSizeThreshold);
request.raw().setAttribute("org.eclipse.jetty.multipartConfig",
multipartConfigElement);
Collection<Part> parts = request.raw().getParts();
for (Part part : parts) {
System.out.println("Name: " + part.getName());
System.out.println("Size: " + part.getSize());
System.out.println("Filename: " + part.getSubmittedFileName());
}
String fName = request.raw().getPart("file").getSubmittedFileName();
System.out.println("Title: " + request.raw().getParameter("title"));
System.out.println("File: " + fName);
Part uploadedFile = request.raw().getPart("file");
Path out = Paths.get("image/" + fName);
try (final InputStream in = uploadedFile.getInputStream()) {
Files.copy(in, out);
uploadedFile.delete();
}
// cleanup
multipartConfigElement = null;
parts = null;
uploadedFile = null;
return "OK";
});
This will work well, I found it in https://groups.google.com/forum/#!msg/sparkjava/fjO64BP1UQw/CsxdNVz7qrAJ
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