在playframework中多文件上传 [英] Multiple file upload in playframework

问题描述

我在使多个文件上传工作时遇到一些问题。当我选择x文件时，它会成功，但是第一个文件上传x次，其他文件根本没有上传。任何人都能指出我做错了什么？

表格：

 ＃{form @ Projects.uploadPictures（project .id），enctype：'multipart / form-data'} 
 
< p> 
< label>& {'title'}< / label> 
< input type =textname =title/> 
< strong>（& {'addPicture.chooseTitle'}）< / strong> 
< / p> 
< p> 
< label>& {'Pictures'}< / label> 
< input type =filemultiple name =filesid =files/> 
< / p> 
< p> 
< input type =submitvalue =& {'publish'}/> 
< / p> 
 $ b $ {/ form} 
  

处理档案：

$ p $ public static void uploadPictures（long id，String title，List< Blob> files）{
String error =;
if（files！= null&&！title.trim（）。equals（））{
Project project = Project.findById（id）;
//保存上传的文件
图片图片;
$ b $ for（int i = 0; i< files.size（）; i ++）{
if（files.get（i）！= null）{
System.out .println（i：+ i +\\\
Filtype：+ files.get（i）.type（））; （file.get（i）.type（）。equals（image / jpeg）|| files.get（i）.type（）。equals（image / png））{
picture = new Picture（project，title +_ bilde _+（i + 1），files.get（i））;
project.addPicture（picture）;
} else {
error + =Fil nummer+（i + 1）+er av typen+ files.get（i）.type（）+og ikke av typen .JPG eller .PNG og ble dermed ikke lagt til。\\\
;
}
} else {
error =Ingen filer funnet;
}
}
} else {
error =Velil en tittel for bildene;

if（error.equals（））{
flash.success（Picture（s）added）;
} else {
flash.error（error）;
}
addPicture（id）;



解决方案

如果有人有兴趣：

  public static void uploadPictures（long id，String title，File fake）{
 List<上载] GT; files =（List< Upload>）request.args.get（__ UPLOADS）; 
 if（files！= null）{
 Project project = Project.findById（id）; 
照片图片; 
 Blob图片; 
 InputStream inStream; 
 for（上传文件：files）{
 if（file！= null）{
 try {
 inStream = new java.io.FileInputStream（file.asFile（））; 
 image = new Blob（）; 
 image.set（inStream，new MimetypesFileTypeMap（）。getContentType（file.asFile（）））; 
 picture = new Picture（project，file.getFileName（），image）; 
 project.addPicture（picture）; //存储图片
} catch（FileNotFoundException e）{
 System.out.println（e.toString（））; 
} 
} 
} 
} 
 addPicture（id）; //呈现图片上传视图
} 
  

很高兴能得到一个可行的解决方案一个Blob对象数组，如果可能的话，不必request.args.get（__ UPLOADS）。

I'm having some problems with getting multiple file upload to work. When I select x files, it goes through successfully, but the first file is being uploaded x times, and the others are not being uploaded at all. Anyone able to point out what I am doing wrong?

Form:

#{form @Projects.uploadPictures(project.id), enctype:'multipart/form-data'}   

<p>
    <label>&{'title'}</label>
    <input type="text" name="title"/>
    <strong>(&{'addPicture.chooseTitle'})</strong>
</p>
<p>
    <label>&{'Pictures'}</label>
    <input type="file" multiple name="files" id="files"/>
</p>
<p>
    <input type="submit" value="&{'publish'}" />
</p>

#{/form}

Handling the files:

public static void uploadPictures(long id, String title, List<Blob> files) {
    String error = "";        
    if(files != null && !title.trim().equals("")) {
        Project project = Project.findById(id);
        // Save uploaded files
        Picture picture;

        for(int i = 0; i<files.size(); i++) {
            if(files.get(i) != null) {
                System.out.println("i: "+i+"\nFiltype: "+files.get(i).type());
                if(files.get(i).type().equals("image/jpeg") || files.get(i).type().equals("image/png")) {
                    picture = new Picture(project, title+"_bilde_"+(i+1), files.get(i));
                    project.addPicture(picture);
                } else {
                    error += "Fil nummer "+(i+1)+" er av typen "+files.get(i).type()+" og ikke av typen .JPG eller .PNG og ble dermed ikke lagt til. \n";
                }
            } else {
                error = "Ingen filer funnet";
            }
        }
    } else {
        error = "Velg en tittel for bildene";
    }
    if(error.equals("")) {
        flash.success("Picture(s) added");
    } else {
        flash.error(error);
    }
    addPicture(id);
}

解决方案

Got it to work like this if anyone is ever interested:

public static void uploadPictures(long id, String title, File fake) {
    List<Upload> files = (List<Upload>) request.args.get("__UPLOADS");
    if(files != null) {
        Project project = Project.findById(id);
        Picture picture;
        Blob image;
        InputStream inStream;
        for(Upload file: files) {
            if(file != null) {
                try {
                    inStream = new java.io.FileInputStream(file.asFile());
                    image = new Blob();
                    image.set(inStream, new MimetypesFileTypeMap().getContentType(file.asFile()));
                    picture = new Picture(project, file.getFileName(), image);
                    project.addPicture(picture); // stores the picture
                } catch (FileNotFoundException e) {
                    System.out.println(e.toString());
                }
            }
        }
    }
    addPicture(id); //renders the image upload view
}

Would be happy to get a working solution with an array of Blob objects instead of having to request.args.get("__UPLOADS") if possible.

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