基本文件上传失败
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我无法在服务器上执行任何上传操作。与“您可以在游戏中完成的五项有趣的事情之一”相反，以下内容似乎无效：
public static void doSingleFileUpload(
Long id, @Required java.io.File upload, String description, String title
) {
Score score = Score.findById(id);
try {
score.files.add(new File(doFileUpload(new FileInputStream(upload), score), title));//PLAY crashes here, with a nullpointer exception on the upload parameter
} catch (IOException ex) {
//TODO: do something nice
}
score.save();
}
doFileUpload
@Check(\"registered\")
private static String doFileUpload(InputStream is, Score score) throws IOException {
//get Score from db
//get dir if present
java.io.File dir = new java.io.File(\"/public/uploads/\" + play.templates.JavaExtensions.slugify(score.title));
//if not, create
if (!dir.exists()) {
dir.mkdirs(); //create new dir if not present
}
//create file on server
java.io.File newfile = new java.io.File(dir, \"testfile.txt\");
OutputStream os = new FileOutputStream(newfile);
IOUtils.copy(is, os);
return newfile.getAbsolutePath();
}
<!-- ... -->
<form action=\"@{ScoreController.doSingleFileUpload()}\" method=\"POST\" enctype=\"multipart/form-data\">
<input type=\"hidden\" name=\"id\" value=\"${score.id}\" />
<input type=\"file\" id=\"upload\" name=\"upload\" />
<input type=\"text\" name=\"description\" />
<input type=\"hidden\" name=\"title\" value=\"${score.title}\" />
<input type=\"submit\" value=\"submit\" />
</form>
upload
public class Application extends Controller {
public static void index() {
File dir = new File(Play.applicationPath+File.separator+\"public\"+File.separator+\"uploads\");
if (!dir.exists() && dir.isDirectory()) {
renderText(\"something went wrong\");
} else {
String[] files = dir.list();
if (files != null) {
render(dir);
} else {
render();
}
}
}
public static void upload(File upload) throws FileNotFoundException, IOException {
File dir = new File(Play.applicationPath+File.separator+\"public\"+File.separator+\"uploads\");
if (!dir.exists()) {
dir.mkdirs();
}
File newfile = new File(dir, upload.getName());
FileInputStream fis = new FileInputStream(upload);
FileOutputStream fos = new FileOutputStream(newfile);
IOUtils.copy(fis, fos);
index();
}
#{extends \'main.html\' /}
#{set title:\'Home\' /}
#{form @Application.upload(), enctype:\'multipart/form-data\'}
<input type=\"file\" name=\"upload\" />
<input type=\"submit\" />
#{/form}
#{if (dir.list()!=null)}
<ul>
#{list items:dir.list(), as:\'file\'}
<li><a href=\"public/uploads/${file}\">${file}</a></li>
#{/list}
</ul>
#{/if}
没有找到相关结果
已邀请:
2 个回复
驮帽俺篮号
对象传递给，第一个参数是。骨乏唯瓜
public static void update(long userId, String aboutMyself, String location, Blob profilePicBlob) { UserProfile userProfile = UserProfile.find(\"select distinct upr from UserProfile upr where upr.user.id = ?\", userId).first(); if(profilePicBlob != null) { //TODO: Delete the old profile pic userProfile.profilePic = new Pic(profilePicBlob).save(); } userProfile.aboutMyself = aboutMyself; userProfile.location = location; userProfile.save(); show(userId); } @Entity public class Pic extends Model { public Blob image; public Pic(Blob image) { this.image = image; } } #{form @UserProfileC.update(userProfile.user.id), enctype:\'multipart/form-data\'} <div> <div>About Myself:</div> <textarea rows=\"10\" cols=\"80\" name=\"aboutMyself\">${userProfile.aboutMyself</textarea> </div> <div> <div>Location</div> <input type=\"text\" name=\"location\" value=\"${userProfile.location}\"/> </div> <div> <input type=\"file\" name=\"profilePicBlob\" /> <label>${userProfile.profilePic == null ? \'Upload\' : \'Change\'} profile pic</label> </div> <div> <input type=\"submit\" value=\"Submit\" id=\"postComment\" /> </div> #{/form}