Java file writing problems

Question

I am having an issue in Java with file creation. Here is my code -

ArrayList<File> list = new ArrayList<File>();
            PrintWriter writer = new PrintWriter(/*classpathRoot + */"list.txt", "UTF-8");
            writer.println("");
            writer.close();
            list.add(new File("list.txt"));
            ZipParameters args = new ZipParameters();
            args.setCompressionMethod(Zip4jConstants.COMP_STORE);
            args.setEncryptFiles(true);
            args.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);
            args.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);
            args.setPassword(keys);
            ZipOutputStream outputStream = null;
            InputStream inputStream = null;
            File out = new File("list.txt");
            outputStream = new ZipOutputStream(new FileOutputStream(/*classpathRoot + */"data/" + NewUser.ufield.getText() + ".zip"));
            outputStream.putNextEntry(out, args);
            inputStream = new FileInputStream(out);
            byte[] readBuff = new byte[4096];
            int readLen = -1;
            while ((readLen = inputStream.read(readBuff)) != -1) {
                outputStream.write(readBuff, 0, readLen);
            }
            outputStream.closeEntry();
            inputStream.close();
            outputStream.finish();
            outputStream.close();

The problem I am having is that when I am in eclipse, the text file is created, but outside of eclipse it is not. The zip file never even creates, in eclipse or not. Got any tips?

I get the following Exception:

java.io.FileNotFoundException: data/eduyjd.zip (No such file or directory)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutputStream.java:110)
at main.NewUserHandler.actionPerformed(NewUserHandler.java:49)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6516)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3311)
at java.awt.Component.processEvent(Component.java:6281)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4872)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4698)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

edit: updated code and exception, text files write in both eclipse and outside, zip files still do not write

Do you get any kind of errors when you run this outside of Eclipse? — Makoto, Jan 08 '15 at 00:36
Also, did you check what is the content of classLoader.getResource("").getPath()? My gut feeling hints that the problem might be there. — Alessandro Santini, Jan 08 '15 at 00:39
`new File("list.txt")`? Not `new File(classpathRoot + "/list.txt")`? — Tom, Jan 08 '15 at 00:39
What is this line `NewUserHandler.java:32`? It seems that you pass `null` into a `File` constructor there. — Tom, Jan 08 '15 at 00:43
@AlessandroSantini This one `new File(classLoader.getResource("").getPath())`? According to the JavaDoc of `URL` (`getResource("")` return `URL`) `getPath` would return an empty String if there is something wrong. So I don't think that this is the source :(. — Tom, Jan 08 '15 at 00:46
@Tom, the exception stacktrace points at the File class constructor... — Alessandro Santini, Jan 08 '15 at 00:48
@Jax "Suddently" you get a new Exception? Btw it is `FileNotFoundException: data/5236.zip (No such file or directory)`, so it can't find a certain file. — Tom, Jan 08 '15 at 00:48
yeah I realized that, guess Zip4j was trying to add files to a zip I though it would also initialize @Tom — Connor, Jan 08 '15 at 00:50
@AlessandroSantini And? His code contains two calls of that constructor, both with Strings and both with not `null` (as I said, according to the JavaDoc of URL). I don't get your point. — Tom, Jan 08 '15 at 00:51
Wouldn't you use `classPathRoot.getAbsolutePath()` instead of just `classPathRoot` since `classPathRoot` is a file object not a string object? — Seth, Jan 08 '15 at 00:51
@Tom I was updating the code throughout, my exception changed because I changed stuff, I have updated the OP with my current code and exception — Connor, Jan 08 '15 at 01:09
@Jax, its the same error. The zip loader cannot find the file you are trying to manipulate. Using `classPathRoot.getAbsolutePath()` will return the string reference to the folder, then adding ` + */"data/" + NewUser.ufield.getText() + ".zip"` will add the extra information directing it to a file. — Seth, Jan 08 '15 at 01:19

Ubica · Accepted Answer · 2015-01-08T01:34:16.570

0

outputStream = new ZipOutputStream(new FileOutputStream(/*classpathRoot + */"data/" + NewUser.ufield.getText() + ".zip"));

this points to non-existing file... see if data folder exists ;) that can cause it

File folder = new File("data");
if (!folder.exists())
    folder.mkdir();

edited Jan 08 '15 at 01:34

answered Jan 08 '15 at 01:19

Ubica

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Java file writing problems

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