从哪里获得“UTF-8” Java中的字符串文字？ [英] Where to get "UTF-8" string literal in Java?

问题描述

我正在尝试在这段代码中使用常量而不是字符串文字：

I'm trying to use a constant instead of a string literal in this piece of code:

new InputStreamReader(new FileInputStream(file), "UTF-8")

UTF-8代码中经常出现，而且更好地引用一些静态最终变量。你知道我在JDK中哪里可以找到这样一个变量吗？

"UTF-8" appears in the code rather often, and would be much better to refer to some static final variable instead. Do you know where I can find such a variable in JDK?

BTW，再想一想，这样的常量设计不好：公共静态文字...不是数据复制的解决方案

BTW, on a second thought, such constants are bad design: Public Static Literals ... Are Not a Solution for Data Duplication

推荐答案

在Java 1.7+中， java.nio.charset.StandardCharsets 定义 Charset 的常量，包括 UTF_8 。

In Java 1.7+, java.nio.charset.StandardCharsets defines constants for Charset including UTF_8.

import java.nio.charset.StandardCharsets;

...

StandardCharsets.UTF_8.name();

适用于Android：minSdk 19

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