如何在Java中将字符串转换为UTF8字节数组 [英] How to convert Strings to and from UTF8 byte arrays in Java

问题描述

在Java中，我有一个字符串，我想把它编码为一个字节数组（在UTF8或一些其他编码）。或者，我有一个字节数组（在一些已知的编码），我想将其转换为Java字符串。如何进行这些转换？

In Java, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?

推荐答案

从字符串转换为byte []：

Convert from String to byte[]:

String s = "some text here";
byte[] b = s.getBytes("UTF-8");

从byte []转换为字符串：

Convert from byte[] to String:

byte[] b = {(byte) 99, (byte)97, (byte)116};
String s = new String(b, "US-ASCII");

当然，您应该使用正确的编码名称。我的例子使用US-ASCII和UTF-8，两种最常见的编码。

You should, of course, use the correct encoding name. My examples used "US-ASCII" and "UTF-8", the two most common encodings.

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