java - 如何通过保存文件布局将不同语言的属性值以其 native 形式写入java中的属性文件？

Question

我有一个本地化的属性文件，其中包含键值对列表。 我想将日语、中文、德语等属性值写入文件，并且还想保存带有注释和空格的现有文件布局。需要以其自己的 native 形式编写这些语言。

我尝试使用 PropertiesConfigurationLayout 将新属性(“key = akaunto ナビゲーション コンポーネント”)添加到现有属性文件中。可以以其 native 形式添加新属性，PropertiesConfigurationLayout 有助于保存文件的布局。但现有的 key 格式将更改为 unicode 格式。 有用的链接:(http://marjavamitjava.com/modifying-property-file-maintaining-order-well-comments/)

这是我尝试过的代码。

代码:

    File file = new File("base_ch.properties");

    PropertiesConfiguration config = new PropertiesConfiguration();
    config.setEncoding("UTF-8");
    PropertiesConfigurationLayout layout = new PropertiesConfigurationLayout(config);
    Properties props = new Properties();

    try(InputStreamReader in = new InputStreamReader(new FileInputStream(file), "UTF-8"))
    {
        layout.load(in);
        OutputStreamWriter out =new OutputStreamWriter(new FileOutputStream(file), "UTF-8");

        props.put("key","アカウント ナビゲーション コンポーネント");
        layout.save(out);
        props.store(out, null);
    }
    catch (ConfigurationException | IOException e) {
        e.printStackTrace();
    }

base_ch.properties代码运行前的文件内容:

# -----------------------------------------------------------------------
#  All rights reserved.
#  Comments included here
# -----------------------------------------------------------------------
#Tue May 22 13:41:37

account.quote.expiration.time.label = Gültig bis
address.zipcode = 邮政编码:

base_ch.properties代码运行后文件内容:

# -----------------------------------------------------------------------
#  All rights reserved.
#  Comments included here
# -----------------------------------------------------------------------
#Tue May 22 13:41:37

account.quote.expiration.time.label = G\u00FCltig bis
address.zipcode = \u90AE\u653F\u7F16\u7801
#Wed Dec 06 17:40:04 IST 2017
key=アカウント ナビゲーション コンポーネント

我想保存文件布局而不进行任何更改，并且应该保留其原始形式的现有属性。 它可以使用各种类将各种语言写入属性文件，但在这种情况下文件布局将会发生变化。 PropertiesConfigurationLayout 是我发现保存布局的唯一方法。

有人可以帮助我吗？

Answer 1

找到了问题的解决方案。

自定义 PropertiesConfiguration 和 PropertiesConfigurationLayout 类以满足要求。

重写 PropertiesConfiguration 中的 escapeValue() 方法，以返回不带转义字符的属性值本身。

重写 PropertiesConfigurationLayout 中的save方法。

下面给出的是扩展 PropertiesConfiguration 的类:

    public class PropertiesConfigurationExtended extends PropertiesConfiguration{

    private static final char[] SEPARATORS = new char[] {'=', ':'};
    private static final char[] WHITE_SPACE = new char[]{' ', '\t', '\f'};
    private static final String ESCAPE = "\\";

    public static class PropertiesWriter extends PropertiesConfiguration.PropertiesWriter{
        private char delimiter;
        /**
         * Constructor.
         */
        public PropertiesWriter(Writer writer, char delimiter)
        {
            super(writer,delimiter);
            this.delimiter = delimiter;
        }
        public void writeProperty(String key, Object value,
                boolean forceSingleLine) throws IOException
        {
            String v;    
            if (value instanceof List)
            {
                List values = (List) value;
                if (forceSingleLine)
                {
                    v = makeSingleLineValue(values);
                }
                else
                {
                    writeProperty(key, values);
                    return;
                }
            }
            else
            {
                v = escapeValue(value);
            }

            write(escapeKey(key));
            write(" = ");
            write(v);

            writeln(null);
        }
        /**
         * Rewrite the escapeValue method to avoid escaping of the given property value.
         *
         * @param value the property value
         * @return the same property value
         */
        private String escapeValue(Object value)
        {
            return String.valueOf(value);
        }
    }
}

下面给出的是扩展 PropertiesConfigurationLayout 的类:

public class PropertiesConfigurationLayoutExtended extends PropertiesConfigurationLayout{

    public PropertiesConfigurationLayoutExtended(PropertiesConfigurationExtended config) {
        super(config);
    }
    public void save(Writer out) throws ConfigurationException
    {
        try
        {
            char delimiter = getConfiguration().isDelimiterParsingDisabled() ? 0
                    : getConfiguration().getListDelimiter();
            PropertiesConfigurationExtended.PropertiesWriter writer = new PropertiesConfigurationExtended.PropertiesWriter(
                    out, delimiter);
            if (getHeaderComment() != null)
            {
                writer.writeln(getCanonicalHeaderComment(true));
                writer.writeln(null);
            }

            for (Iterator it = getKeys().iterator(); it.hasNext();)
            {
                String key = (String) it.next();
                if (getConfiguration().containsKey(key))
                {
                    // Output blank lines before property
                    for (int i = 0; i < getBlancLinesBefore(key); i++)
                    {
                        writer.writeln(null);
                    }
                    // Output the comment
                    if (getComment(key) != null)
                    {
                        writer.writeln(getCanonicalComment(key, true));
                    }
                    // Output the property and its value
                    boolean singleLine = (isForceSingleLine() || isSingleLine(key))
                            && !getConfiguration().isDelimiterParsingDisabled();
                    writer.writeProperty(key, getConfiguration().getProperty(
                            key), singleLine);
                }
            }
            writer.flush();
        }
        catch (IOException ioex)
        {
            throw new ConfigurationException(ioex);
        }
    }
}

用于将属性写入文件的类:

    File file = new File("base_ch.properties");
    PropertiesConfigurationExtended config = new PropertiesConfigurationExtended();
    PropertiesConfigurationLayoutExtended layout = new PropertiesConfigurationLayoutExtended(config);

    try(InputStreamReader in = new InputStreamReader(new FileInputStream(file), "UTF-8"))
    {
        layout.load(in);    
        OutputStreamWriter out =new OutputStreamWriter(new FileOutputStream(file), "UTF-8");
        config.setProperty("key","アカウント ナビゲーション コンポーネント");
        layout.save(out, false));       
    }
    catch (ConfigurationException | IOException e) {
        e.printStackTrace();
    }