我需要使用UTF-8在我的资源属性使用Java的ResourceBundle。当我直接在属性文件中输入文本时,它显示为mojibake。
我的应用程序运行在谷歌应用程序引擎。
谁能给我举个例子?我找不到这份工作。
我需要使用UTF-8在我的资源属性使用Java的ResourceBundle。当我直接在属性文件中输入文本时,它显示为mojibake。
我的应用程序运行在谷歌应用程序引擎。
谁能给我举个例子?我找不到这份工作。
当前回答
Properties prop = new Properties();
String fileName = "./src/test/resources/predefined.properties";
FileInputStream inputStream = new FileInputStream(fileName);
InputStreamReader reader = new InputStreamReader(inputStream,"UTF-8");
其他回答
我们创建了一个资源。utf8文件,包含UTF-8格式的资源,并有一个规则运行如下:
native2ascii -encoding utf8 resources.utf8 resources.properties
http://sourceforge.net/projects/eclipse-rbe/
如前所述,属性文件应该用ISO 8859-1编码
您可以使用上面的eclipse IDE插件为您进行Unicode转换。
package com.varaneckas.utils;
import java.io.UnsupportedEncodingException;
import java.util.Enumeration;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
/**
* UTF-8 friendly ResourceBundle support
*
* Utility that allows having multi-byte characters inside java .property files.
* It removes the need for Sun's native2ascii application, you can simply have
* UTF-8 encoded editable .property files.
*
* Use:
* ResourceBundle bundle = Utf8ResourceBundle.getBundle("bundle_name");
*
* @author Tomas Varaneckas <tomas.varaneckas@gmail.com>
*/
public abstract class Utf8ResourceBundle {
/**
* Gets the unicode friendly resource bundle
*
* @param baseName
* @see ResourceBundle#getBundle(String)
* @return Unicode friendly resource bundle
*/
public static final ResourceBundle getBundle(final String baseName) {
return createUtf8PropertyResourceBundle(
ResourceBundle.getBundle(baseName));
}
/**
* Creates unicode friendly {@link PropertyResourceBundle} if possible.
*
* @param bundle
* @return Unicode friendly property resource bundle
*/
private static ResourceBundle createUtf8PropertyResourceBundle(
final ResourceBundle bundle) {
if (!(bundle instanceof PropertyResourceBundle)) {
return bundle;
}
return new Utf8PropertyResourceBundle((PropertyResourceBundle) bundle);
}
/**
* Resource Bundle that does the hard work
*/
private static class Utf8PropertyResourceBundle extends ResourceBundle {
/**
* Bundle with unicode data
*/
private final PropertyResourceBundle bundle;
/**
* Initializing constructor
*
* @param bundle
*/
private Utf8PropertyResourceBundle(final PropertyResourceBundle bundle) {
this.bundle = bundle;
}
@Override
@SuppressWarnings("unchecked")
public Enumeration getKeys() {
return bundle.getKeys();
}
@Override
protected Object handleGetObject(final String key) {
final String value = bundle.getString(key);
if (value == null)
return null;
try {
return new String(value.getBytes("ISO-8859-1"), "UTF-8");
} catch (final UnsupportedEncodingException e) {
throw new RuntimeException("Encoding not supported", e);
}
}
}
}
Java 9及更新版本
从Java 9开始,属性文件默认编码为UTF-8,使用ISO-8859-1以外的字符应该可以开箱即用。
Java 8及以上版本
当指定了.properties文件时,ResourceBundle#getBundle()在封面下使用PropertyResourceBundle。这反过来使用默认的Properties#load(InputStream)来加载这些属性文件。根据javadoc,它们默认读取为ISO-8859-1。
public void load(InputStream stream)抛出IOException
从输入字节流中读取属性列表(键和元素对)。输入流采用load(Reader)中指定的简单的面向行的格式,并假定使用ISO 8859-1字符编码;即每个字节是一个拉丁字符。非拉丁字符1和某些特殊字符使用Java™语言规范3.3节中定义的Unicode转义符在键和元素中表示。
So, you'd need to save them as ISO-8859-1. If you have any characters beyond ISO-8859-1 range and you can't use \uXXXX off top of head and you're thus forced to save the file as UTF-8, then you'd need to use the native2ascii tool to convert an UTF-8 saved properties file to an ISO-8859-1 saved properties file wherein all uncovered characters are converted into \uXXXX format. The below example converts a UTF-8 encoded properties file text_utf8.properties to a valid ISO-8859-1 encoded properties file text.properties.
native2ascii -encoding UTF-8 text_utf8.properties text.properties
在使用Eclipse等正常的IDE时,当您在基于Java的项目中创建.properties文件并使用Eclipse自己的编辑器时,这已经自动完成了。Eclipse将透明地将超出ISO-8859-1范围的字符转换为\uXXXX格式。另见下面的截图(注意底部的“属性”和“源”选项卡,点击放大):
或者,您也可以创建一个定制的ResourceBundle。控件实现,其中您显式读取属性文件为UTF-8使用InputStreamReader,这样您就可以将它们保存为UTF-8而不需要与native2ascii的麻烦。下面是一个开始的例子:
public class UTF8Control extends Control {
public ResourceBundle newBundle
(String baseName, Locale locale, String format, ClassLoader loader, boolean reload)
throws IllegalAccessException, InstantiationException, IOException
{
// The below is a copy of the default implementation.
String bundleName = toBundleName(baseName, locale);
String resourceName = toResourceName(bundleName, "properties");
ResourceBundle bundle = null;
InputStream stream = null;
if (reload) {
URL url = loader.getResource(resourceName);
if (url != null) {
URLConnection connection = url.openConnection();
if (connection != null) {
connection.setUseCaches(false);
stream = connection.getInputStream();
}
}
} else {
stream = loader.getResourceAsStream(resourceName);
}
if (stream != null) {
try {
// Only this line is changed to make it to read properties files as UTF-8.
bundle = new PropertyResourceBundle(new InputStreamReader(stream, "UTF-8"));
} finally {
stream.close();
}
}
return bundle;
}
}
可以这样使用:
ResourceBundle bundle = ResourceBundle.getBundle("com.example.i18n.text", new UTF8Control());
参见:
Unicode -如何得到正确的字符?
Properties prop = new Properties();
String fileName = "./src/test/resources/predefined.properties";
FileInputStream inputStream = new FileInputStream(fileName);
InputStreamReader reader = new InputStreamReader(inputStream,"UTF-8");