Question

这是我的情况。我正在将IPreferenceStore store = EditorsUI.getPreferenceStore(); store.getInt(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_TAB_WIDTH));声明写入XML文件。我使用扫描仪读取原始XML文件。当扫描程序读取输入文件时，我将这些行写入BufferedWriter。当扫描仪在第2行时，我从传递给该方法的ArrayList中写入<!ENTITY>值。我的<!ENTITY>值写没有问题。我遇到的问题是我只将400行左右的文件写入输出文件。

我已经阅读了一些关于BufferedWriters没有完成文件写入的帖子，所有这些似乎都指向确保编写器关闭。我关闭了我的作家对象。

<!ENTITY>

编写器的输出用于生成PDF。正在读取的文件和添加的private void addEntityRefs(Map<String, String> icns, File xml) { String path = xml.getAbsolutePath().substring(0,xml.getAbsolutePath().lastIndexOf(File.separator)+1); ArrayList<String> list = new ArrayList<String>(); Scanner reader = null; BufferedWriter writer = null; for(Map.Entry<String, String> e : icns.entrySet()) { list.add(e.getValue()); } try { reader = new Scanner(xml); //standardOut.println("Reading " + xml.getName()); //System.out.println(); int c = 0; String output = path + "out2.xml"; writer = new BufferedWriter(new FileWriter(new File(output))); while(reader.hasNextLine()) { c++; if(c == 1) { writer.append(reader.nextLine().replaceAll("\\s", " ")); } else if(c == 2) { System.out.println("writing entities @ line 2"); writer.append("\n<!DOCTYPE pm [\n"); for(int i = 0; i < list.size(); i++) { writer.append("<!ENTITY " + list.get(i).trim() + " SYSTEM \"" + list.get(i).trim() + ".cgm\" NDATA cgm>\n"); } writer.append("<!NOTATION cgm PUBLIC \"cgm\" \"\">\n]>\n"); } else { System.out.println("Writing line " + c); writer.append(reader.nextLine().replaceAll("\\s", " ")+ "\r"); } } } catch (FileNotFoundException ex) { Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, ex); JOptionPane.showMessageDialog(this, ex, "File Not Found Exception", JOptionPane.ERROR_MESSAGE); } catch (IOException ex) { Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, ex); JOptionPane.showMessageDialog(this, ex, "IO Exception", JOptionPane.ERROR_MESSAGE); } finally { try { reader.close(); writer.close(); } catch(Exception e) { Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, e); JOptionPane.showMessageDialog(this, e, "Exception", JOptionPane.ERROR_MESSAGE); } } }声明大约为26,000行。有人能指出我哪里出错了吗？当我从NetBeans运行应用程序时，此方法可以正常工作，但是一旦我构建它并尝试从JAR文件运行，它就会在大约400行之后停止。

Answer 1

当它停在某一行时。你看到用这些行创建的文件？可能是那个时候刷新了缓冲区并且在那个操作中失败了。

当c == 2时，您不会将指针移动到下一行，而是在下一次迭代中继续写入。在读/写时使用charset总是更好。最后试着冲洗。并独立地关闭读者和作者。不必使用ArrayList。

我对这个做了一些小改动。看它是否仍然有效。

private void addEntityRefs(Map<String, String> icns, File xml) {
    Scanner reader = null;
    BufferedWriter writer = null;
    try {
        reader = new Scanner(xml, "utf-8");
        // standardOut.println("Reading " + xml.getName());
        // System.out.println();
        int count = 0;
        File targetFile = new File(xml.getParentFile(), "out2.xml");
        if (!targetFile.exists()) {
            boolean created = targetFile.createNewFile();
            System.out.println("File created: " + created);
        }
        writer = new BufferedWriter(new FileWriter(targetFile));

        while (reader.hasNextLine()) {
            count++;
            if (count == 1) {
                writer.append(reader.nextLine().replaceAll("\\s", " "));
            } else if (count == 2) {
                System.out.println("writing entities @ line 2");
                writer.append("\n<!DOCTYPE pm [\n");

                for (String item : icns.keySet()) {
                    item = item.trim();
                    writer.append("<!ENTITY " + item + " SYSTEM \"" + item + ".cgm\" NDATA cgm>\n");
                }
                writer.append("<!NOTATION cgm PUBLIC \"cgm\" \"\">\n]>\n");
            } else {
                System.out.println("Writing line " + count);
                writer.append(reader.nextLine().replaceAll("\\s", " ")).append("\r");
            }
        }
        // done writing
        writer.flush();

    } catch (FileNotFoundException ex) {
        Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, ex);
        JOptionPane.showMessageDialog(this, ex, "File Not Found Exception", JOptionPane.ERROR_MESSAGE);
    } catch (IOException ex) {
        Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, ex);
        JOptionPane.showMessageDialog(this, ex, "IO Exception", JOptionPane.ERROR_MESSAGE);
    } finally {
        try {
            reader.close();
        } catch (Exception e) {
            Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, e);
            JOptionPane.showMessageDialog(this, e, "Exception", JOptionPane.ERROR_MESSAGE);
        }
        try {
            writer.close();
        } catch (Exception e) {
            Logger.getLogger(AARPdfGenUI.class.getName()).log(Level.WARN, null, e);
            JOptionPane.showMessageDialog(this, e, "Exception", JOptionPane.ERROR_MESSAGE);
        }
    }
}

Java BufferWriter未完成文件写入

1 个答案: