更改String（byte []）的默认编码 [英] Changing the default encoding for String(byte[])

问题描述

有没有办法改变String（byte []）构造函数使用的编码？

在我自己的代码中，我使用String（byte []，String ）来指定编码，但是我正在使用一个我无法更改的外部库。

  String src =with incents：éà ; 
 byte [] bytes = src.getBytes（UTF-8）; 
 System.out.println（UTF-8 decode：+ new String（bytes，UTF-8））; 
 System.out.println（Default decoding：+ new String（bytes））; 
  

输出为：

 UTF-8解码：带重音：éà
默认解码：带有重音：éÃ
 

我有尝试更改系统属性 file.encoding ，但它不起作用。

解决方案

p>您需要在启动JVM之前更改区域设置;请参阅：

Java，错误ID 4163515

有些地方似乎意味着您可以通过在启动JVM时设置file.encoding变量来执行此操作，例如

  java -Dfile.encoding = UTF-8 ... 
  

...但我没有尝试过这个。最安全的方法是在操作系统中设置环境变量。

Is there a way to change the encoding used by the String(byte[]) constructor ?

In my own code I use String(byte[],String) to specify the encoding but I am using an external library that I cannot change.

String src = "with accents: é à";
byte[] bytes = src.getBytes("UTF-8");
System.out.println("UTF-8 decoded: "+new String(bytes,"UTF-8"));
System.out.println("Default decoded: "+new String(bytes));

The output for this is :

UTF-8 decoded: with accents: é à
Default decoded: with accents: é à

I have tried changing the system property file.encoding but it does not work.

解决方案

You need to change the locale before launching the JVM; see:

Java, bug ID 4163515

Some places seem to imply you can do this by setting the file.encoding variable when launching the JVM, such as

java -Dfile.encoding=UTF-8 ...

...but I haven't tried this myself. The safest way is to set an environment variable in the operating system.

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