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ResourceBundle

时间:2022-12-19 15:35:30浏览次数:49  
标签:String ResourceBundle getBundle resourceBundle base properties

ResourceBundle本质上也是一个映射,但是它提供了国际化的功能。 
假设电脑设置的地区是中国大陆,语言是中文 
那么你向ResourceBundle(资源约束名称为base)获取abc变量的值的时候,ResourceBundle会先后搜索 
base_zh_CN_abc.properties 
base_zh_CN.properties 
base_zh.properties 
base.properties 
文件,直到找到abc为止 

相应的,在英国就会去找base_en_GB_abc.properties等。 
因此,你只需要提供不同语言的资源文件,而无需改变代码,就达到了国际化的目的。 
另外,在.properties里面,不能直接使用中文之类文字,而是要通过native2ascii转乘\uxxxx这种形式
附:
1.编码问题:
无论系统的默认编码是什么,ResourceBundle在读取properties文件时统一使用iso8859-1编码。
因此,如果在默认编码为 GBK的系统中编写了包含中文的properties文件,经由ResourceBundle读入时,必须转换为GBK格式的编码,否则不能正确识别。src\resources\resourceBundle.properties

username=hello
pwd=root
zhname=小明

 

 

 

 

package resources;

import java.util.ResourceBundle;

public class ResourceBundleDemo {
public static void main(String[] args) {
//baseName是Properties文件在当前项目的相对全路径,不需要扩展名src\resources\resourceBundle.properties
ResourceBundle resourceBundle = ResourceBundle.getBundle("resources/resourceBundle");
String userName = resourceBundle.getString("username");
String pwd = resourceBundle.getString("pwd");
String zhName = resourceBundle.getString("zhname");
System.out.println(String.format("UserName:%s,Pwd:%s,中文名:%s", userName, pwd,zhName));
}
}

Output:
UserName:hello,Pwd:root,中文名:???÷
乱码原因:

在.properties里面,不能直接使用中文之类文字,而是要通过native2ascii转乘\uxxxx这种形式

/**
* Gets a resource bundle using the specified base name, the default locale,
* and the caller's class loader. Calling this method is equivalent to calling
* <blockquote>
* <code>getBundle(baseName, Locale.getDefault(), this.getClass().getClassLoader())</code>,
* </blockquote>
* except that <code>getClassLoader()</code> is run with the security
* privileges of <code>ResourceBundle</code>.
* See {@link #getBundle(String, Locale, ClassLoader) getBundle}
* for a complete description of the search and instantiation strategy.
*
* @param baseName the base name of the resource bundle, a fully qualified class name
* @exception java.lang.NullPointerException
* if <code>baseName</code> is <code>null</code>
* @exception MissingResourceException
* if no resource bundle for the specified base name can be found
* @return a resource bundle for the given base name and the default locale
*/
public static final ResourceBundle getBundle(String baseName)
{
return getBundleImpl(baseName, Locale.getDefault(),
/* must determine loader here, else we break stack invariant */
getLoader(),
Control.INSTANCE);
}

 


ResourceBundle
ResourceBundle conf= ResourceBundle.getBundle("config/fnconfig/fnlogin");
String value= conf.getString("key");


Properties:
Properties prop = new Properties();
try {
InputStream is = getClass().getResourceAsStream("xmlPath.properties");
prop.load(is);
//或者直接prop.load(new FileInputStream("c:/xmlPath.properties"));
if (is != null) {
is.close();
}
} catch (Exception e) {
System.out.println( "file " + "catalogPath.properties" + " not found!\n" + e);
}
String value= prop.getProperty("key").toString();

 



​​​http://oyzzhou.iteye.com/blog/854796​




标签:String,ResourceBundle,getBundle,resourceBundle,base,properties
From: https://blog.51cto.com/u_15147537/5952687

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