from&＃xff1a;http://blog.csdn.net/miemie1320/article/details/7761848
之前在java上写过String转为byte数组的代码&＃xff0c;后来在开发iPhone程序的时候&＃xff0c;发现也需要把NSString转为byte数组&＃xff0c;并且需要达到跟java程序兼容。但是发现java自身的默认编码机制为iso-8859-1&＃xff0c;而ios的默认编码机制为utf-8&＃xff0c;所以直接编码并不能达到两者兼容的问题。后来查阅相关资料&＃xff0c;最后解决了编码兼容的问题&＃xff0c;而且中英文都通用。
如下为java代码&＃xff1a;
- String str &＃61; "你好啊,aBc!";
- ByteArrayOutputStream baos &＃61; new ByteArrayOutputStream();
- DataOutputStream outputstream &＃61; new DataOutputStream(baos);
- outputstream.writeChars(str);
-
- byte[] contents &＃61; baos.toByteArray();
- for (int i &＃61; 0; i < contents.length; i&＃43;&＃43;) {
- System.out.println("contents:"&＃43;contents[i]);
- }
最后打印为&＃xff1a; - contents:79
- contents:96
- contents:89
- contents:125
- contents:85
- contents:74
- contents:0
- contents:44
- contents:0
- contents:97
- contents:0
- contents:66
- contents:0
- contents:99
- contents:0
- contents:33
ios代码&＃xff1a;
- NSString *str &＃61; &＃64;"你好啊,aBc!";
- NSStringEncoding enc &＃61; CFStringConvertEncodingToNSStringEncoding(NSUTF16BigEndianStringEncoding);
- NSData *data &＃61; [str dataUsingEncoding:enc];
- Byte *byte &＃61; (Byte *)[data bytes];
- for (int i&＃61;0 ; i<[data length]; i&＃43;&＃43;) {
- NSLog(&＃64;"byte &＃61; %d",byte[i]);
- }
最后打印结果为
- 2012-07-19 10:07:46.967 encoding[593:f803] byte &＃61; 79
- 2012-07-19 10:07:46.969 encoding[593:f803] byte &＃61; 96
- 2012-07-19 10:07:46.969 encoding[593:f803] byte &＃61; 89
- 2012-07-19 10:07:46.970 encoding[593:f803] byte &＃61; 125
- 2012-07-19 10:07:46.970 encoding[593:f803] byte &＃61; 85
- 2012-07-19 10:07:46.970 encoding[593:f803] byte &＃61; 74
- 2012-07-19 10:07:46.970 encoding[593:f803] byte &＃61; 0
- 2012-07-19 10:07:46.971 encoding[593:f803] byte &＃61; 44
- 2012-07-19 10:07:46.971 encoding[593:f803] byte &＃61; 0
- 2012-07-19 10:07:46.971 encoding[593:f803] byte &＃61; 97
- 2012-07-19 10:07:46.971 encoding[593:f803] byte &＃61; 0
- 2012-07-19 10:07:46.972 encoding[593:f803] byte &＃61; 66
- 2012-07-19 10:07:46.972 encoding[593:f803] byte &＃61; 0
- 2012-07-19 10:07:46.972 encoding[593:f803] byte &＃61; 99
- 2012-07-19 10:07:46.972 encoding[593:f803] byte &＃61; 0
- 2012-07-19 10:07:46.973 encoding[593:f803] byte &＃61; 33
编码达到了一致&＃xff01;
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