Java POI Excel编码 - 调试与生产

Question

我正在写一个简单的程序，应该将excel页面从希伯来语翻译成英语。 为此，代码读取每个单元格的内容，并将其与从简单的csv文件中获取信息的地图进行比较。 从IntelliJ运行程序，该程序完美地运行并做它应该做的事情，但是将它编译成jar，程序不会这样做。

//Code for loading the csv contents to a map
private static Map<String,String> getLocalization(String pathToJar) {
    String path = null;
    path = pathToJar + "localization.csv";

    String line = "";
    HashMap<String, String> list = new HashMap<>();
    try {
        BufferedReader br = new BufferedReader(new FileReader(path));
        while ((line = br.readLine()) != null) {
            // use comma as separator
            String[] array = line.split(",");
            list.put(array[0], array[1]);
        }

    } catch (IOException e) {
        e.printStackTrace();
    }

    return list;
}

//Code for loading an Excel file and translating it
private static boolean updateExcel(Map<String,String> translation, String filepath, String pathToJar) {
    String path = pathToJar + "temp\\week.xlsx";

    //Read Excel document first
    FileInputStream input_document = null;
    XSSFWorkbook my_xlsx_workbook = null;
    try {
        input_document = new FileInputStream(new File(path));
        // convert it into a POI object
        my_xlsx_workbook = new XSSFWorkbook(input_document);
    } catch (IOException e) {
        e.printStackTrace();
    }

    // Read excel sheet that needs to be updated
    XSSFSheet my_worksheet = null;
    if (my_xlsx_workbook != null) {
        my_worksheet = my_xlsx_workbook.getSheetAt(0);
    }


    for (Row cells : my_worksheet) {
        String name = "";
        String shortCode = "";

        //Get the row object
        Row row = cells;

        //Every row has columns, get the column iterator and iterate over them
        Iterator<Cell> cellIterator = row.cellIterator();

        while (cellIterator.hasNext()) {
            //Get the Cell object
            Cell cell = cellIterator.next();
            //check the cell type and process accordingly
            switch (cell.getCellType()) {
                case STRING:
                    for (Map.Entry<String, String> entry : translation.entrySet()) {
                        if (cell.getStringCellValue().contains(entry.getKey())) {
                            cell.setCellValue(entry.getValue());
                        }
                    }
                    break;
            }

        }
    }
    my_worksheet.autoSizeColumn(1);

    FileOutputStream outFile = null;
    try {
        if (input_document != null) {
            input_document.close();
        }
        File finishedFile = new File(path);
        outFile = new FileOutputStream(finishedFile);
        my_xlsx_workbook.write(outFile);
        outFile.close();

        finishedFile.renameTo(new File(filepath));
        return true;
    } catch (IOException e) {
        e.printStackTrace();
    }

    return false;
}

csv文件类似于： hebrew_word，english_word hebrew_word，english_word hebrew_word，english_word ...

我查了几件事： 1.正在从文件中读取地图（尝试将其编码为UTF-8） 2. IntelliJ的设置设置为UTF-8

我相信这是一个编码问题，将地图的键输出到excel单元格会显示一堆特殊字符而不是单词。

如果还有其他需要的信息，请告诉我，并提前致谢。

Answer 1

FileReader是一个旧的实用程序类，它使用默认的平台编码。在IntelliJ中运行，你说它被设置为UTF-8，就像文件的编码一样。在IntelliJ之外它取决于机器。 Windows到目前为止不使用UTF-8。

从java 8开始，可以用Files.lines做到这一点：

try {
    Path p = Paths.get(path);
    Files.lines(p)
        .map(line ->line.split(",\\s*"))
        .filter(array -> array.length >= 2)
        .forEach(array -> list.put(array[0], array[1]));
} catch (IOException e) {
    e.printStackTrace();
}

Files.lines也可以通过Charset，但新的默认值是UTF-8。