无效的URL /非法参数使用目录路径创建新类型“文件”时的异常目的 [英] Invalid URL/Illegal Argument Exception when using directory path to create a new type "File" object
问题描述
我正在使用一个directorychooser来选择DirectoryChooser()方法中的图像目录,但是当尝试选择一个目录时,我收到一个非法的参数异常/无效的URL异常。
I'm using a directorychooser to select a directory of images in the DirectoryChooser() method, yet I get a illegal argument exception/Invalid URL exception when trying to select a directory.
ImageView imgView = new ImageView( strImageList[ count ].getPath() );
这个^是对应于stacktrace中引用的行348的代码
This^ is the code that corresponds to line 348 referenced in stacktrace
makeImageViewArr(folder.getAbsolutePath());
这个^是对应于stacktrace中引用的第104行的代码
This^ is the code that corresponds to line 104 referenced in stacktrace
Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: Invalid URL: Invalid URL or resource not found
at javafx.scene.image.Image.validateUrl(Image.java:1118)
at javafx.scene.image.Image.<init>(Image.java:620)
at javafx.scene.image.ImageView.<init>(ImageView.java:166)
at ICGPixelReader.makeImageViewArr(ICGPixelReader.java:348)
at ICGPixelReader.DirectoryChooser(ICGPixelReader.java:104)
at ICGPixelReader.lambda$addElements1$0(ICGPixelReader.java:205)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8411)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:380)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:416)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:415)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
Caused by: java.lang.IllegalArgumentException: Invalid URL or resource not found
at javafx.scene.image.Image.validateUrl(Image.java:1110)
... 49 more
他的目录Cososer方法
Heres the directoryChooser method
//Handles when user presses button to open file chooser and select
//the folder of images
private void DirectoryChooser(){
DirectoryChooser chooser = new DirectoryChooser();
chooser.setTitle("Open images folder");
folder = chooser.showDialog(window);
//Null directory check
if(folder == null){
System.out.println("Null directory");
}
//Else make the image array from that folder
else{
System.out.println(folder);
makeImageViewArr(folder.getAbsolutePath());
}
}
//END METHOD
此目录路径将被用作另一种方法(makeImageViewArr(String folderName))方法的参数。
This directory path is to be used as parameter for another method (the makeImageViewArr(String folderName) ) method.
//Makes imageView arraylist from all images in a given directory
private ArrayList<ImageView> makeImageViewArr(String folderName) {
System.out.println(folderName);
//transer file names from directory folder to string array
File imagesDir = new File(folderName);
File[] strImageList = imagesDir.listFiles();
myMouseHandler mouseHandler = new myMouseHandler();
//instantiate imageview arraylist
arrImageList = new ArrayList<ImageView>();
//get files from folder & start at 1 to ignore ds.Store
for( int count = 1; count < strImageList.length; count++ ) {
ImageView imgView = new ImageView( strImageList[ count ].getPath() );
imgView.setOnMouseClicked( mouseHandler );
imgView.setFitHeight(500);
imgView.setFitWidth(500);
imgView.setPreserveRation(true);
arrImageList.add( imgView );
}
return arrImageList;
}//END METHOD
推荐答案
将文件路径作为字符串传递给 ImageView
构造函数:
You are passing the file path as a string to the ImageView
constructor:
ImageView imgView = new ImageView( strImageList[ count ].getPath() );
但是, ImageView
code> String 正在期待一个URL。如文档:
However, the ImageView
constructor taking a String
is expecting a URL. As stated in the documentation:
分配一个新的ImageView对象,并从指定的URL加载图像。
Allocates a new ImageView object with image loaded from the specified URL.
文件路径不是一个URL,通常甚至不能有效地形成为一个URL(例如,它可能具有非法字符,例如空格)
A file path is not a URL, and is often not even validly formed as a URL (it may have illegal characters, such as white space, for example).
所以,不要传递路径,您应该传递从文件获得的URL:
So instead of passing the path, you should pass a URL that you get from the file:
ImageView imgView = new ImageView( strImageList[ count ].getURI().toString() );
除此之外,您的 DirectorChooser()
(sic)方法将选择的文件
转换为 String
,然后将其传递给您的 makeImageViewArr(...)
方法,您立即在其中创建一个文件
。这是奇怪的(至少说)。只需更改接受文件的方法,并直接传递文件:
As an aside, your DirectorChooser()
(sic) method converts the chosen File
to a String
, which you then pass to your makeImageViewArr(...)
method, where you immediately create a File
out of it. This is bizarre (to say the least). Just change the method to accept a file, and pass the file directly:
private void DirectoryChooser(){
DirectoryChooser chooser = new DirectoryChooser();
chooser.setTitle("Open images folder");
folder = chooser.showDialog(window);
//Null directory check
if(folder == null){
System.out.println("Null directory");
}
//Else make the image array from that folder
else{
System.out.println(folder);
makeImageViewArr(folder);
}
}
和
private ArrayList<ImageView> makeImageViewArr(File imagesDir) {
File[] strImageList = imagesDir.listFiles();
myMouseHandler mouseHandler = new myMouseHandler();
//instantiate imageview arraylist
arrImageList = new ArrayList<ImageView>();
//get files from folder & start at 1 to ignore ds.Store
for( int count = 1; count < strImageList.length; count++ ) {
ImageView imgView = new ImageView( strImageList[ count ].toURI().toString() );
imgView.setOnMouseClicked( mouseHandler );
imgView.setFitHeight(500);
imgView.setFitWidth(500);
imgView.setPreserveRation(true);
arrImageList.add( imgView );
}
return arrImageList;
}
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