Question

我在Java中遇到文件创建问题。这是我的代码 -

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();

我遇到的问题是，当我在eclipse中时，文本文件被创建，但在eclipse之外它不是。在eclipse中，zip文件甚至不会创建。有什么提示吗？

我得到以下例外：

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)

编辑：更新代码和异常，在eclipse和外部写入文本文件，zip文件仍然不写

Answer 1

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

这指向不存在的文件...查看是否存在data文件夹;）可能导致该文件

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

Java文件编写问题

1 个答案: