📄 1655.html
字号:
<br>
====reading and decoding from files======<br>
[test 2-1]: read hello.orig.html: decoding with system default encoding<br>
string=Hello world 世界你好 length=20<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='? byte=-54 short=202 LATIN_1_SUPPLEMENT<br>
char[13]='? byte=-64 short=192 LATIN_1_SUPPLEMENT<br>
char[14]='? byte=-67 short=189 LATIN_1_SUPPLEMENT<br>
char[15]='? byte=-25 short=231 LATIN_1_SUPPLEMENT<br>
char[16]='? byte=-60 short=196 LATIN_1_SUPPLEMENT<br>
char[17]='? byte=-29 short=227 LATIN_1_SUPPLEMENT<br>
char[18]='? byte=-70 short=186 LATIN_1_SUPPLEMENT<br>
char[19]='? byte=-61 short=195 LATIN_1_SUPPLEMENT<br>
<br>
按系统从中间存储hello.orig.html文件中读取相应文件,虽然是半个字读取的,但由于能完整的还原,因此输出显示没有错误。<br>
其实PHP等应用很少出现字符集问题其实就是这个原因,全程都是按字节流方式处理,很好的还原了输入,但同时也失去了对字符的控制<br>
<br>
[test 2-2]: read hello.gb2312.html: decoding as GB2312<br>
string=Hello world ???? length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='?' byte=63 short=63 BASIC_LATIN<br>
char[13]='?' byte=63 short=63 BASIC_LATIN<br>
char[14]='?' byte=63 short=63 BASIC_LATIN<br>
char[15]='?' byte=63 short=63 BASIC_LATIN<br>
<br>
这个'?'真的是问号char(63)了,很多数据就是这样没救了,<br>
<br>
[test 2-3]: read hello.utf8.html: decoding as UTF8<br>
string=Hello world ???? length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='?' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='?' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='?' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='?' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
great! 字符虽然显示为'?',但实际上字符的解码是正确的,从相应的UNICODE MAPPING就可以看的出来。<br>
====write hello world to files======<br>
[test 1-1]: with system default encoding=GBK<br>
string=Hello world 世界你好 length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='世' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='界' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='你' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='好' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
注意:在一个新的LOCALE下需要将源程序重新编译,最早的字节流到字符流的解码过程从JAVAC就开始了<br>
<br>
[test 1-2]: getBytes with platform default encoding and decoding as gb2312:<br>
string=Hello world 世界你好 length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='世' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='界' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='你' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='好' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
在中文环境下,和上面缺省的编码解码结果是一致的<br>
<br>
[test 1-3]: convert string to UTF8<br>
string=Hello world 涓栫晫浣犲ソ length=18<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='涓' byte=-109 short=28051 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='栫' byte=43 short=26667 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='晫' byte=107 short=26219 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='浣' byte=99 short=28003 CJK_UNIFIED_IDEOGRAPHS<br>
char[16]='犲' byte=-78 short=29362 CJK_UNIFIED_IDEOGRAPHS<br>
char[17]='ソ' byte=-67 short=12477 KATAKANA<br>
<br>
<br>
====reading and decoding from files======<br>
[test 2-1]: read hello.orig.html: decoding with system default encoding<br>
string=Hello world 世界你好 length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='世' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='界' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='你' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='好' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
<br>
[test 2-2]: read hello.gb2312.html: decoding as GB2312<br>
string=Hello world 世界你好 length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='世' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='界' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='你' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='好' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
<br>
[test 2-3]: read hello.utf8.html: decoding as UTF8<br>
string=Hello world 世界你好 length=16<br>
char[0]='H' byte=72 short=72 BASIC_LATIN<br>
char[1]='e' byte=101 short=101 BASIC_LATIN<br>
char[2]='l' byte=108 short=108 BASIC_LATIN<br>
char[3]='l' byte=108 short=108 BASIC_LATIN<br>
char[4]='o' byte=111 short=111 BASIC_LATIN<br>
char[5]=' ' byte=32 short=32 BASIC_LATIN<br>
char[6]='w' byte=119 short=119 BASIC_LATIN<br>
char[7]='o' byte=111 short=111 BASIC_LATIN<br>
char[8]='r' byte=114 short=114 BASIC_LATIN<br>
char[9]='l' byte=108 short=108 BASIC_LATIN<br>
char[10]='d' byte=100 short=100 BASIC_LATIN<br>
char[11]=' ' byte=32 short=32 BASIC_LATIN<br>
char[12]='世' byte=22 short=19990 CJK_UNIFIED_IDEOGRAPHS<br>
char[13]='界' byte=76 short=30028 CJK_UNIFIED_IDEOGRAPHS<br>
char[14]='你' byte=96 short=20320 CJK_UNIFIED_IDEOGRAPHS<br>
char[15]='好' byte=125 short=22909 CJK_UNIFIED_IDEOGRAPHS<br>
<br>
UNICODE方式的存储几乎可以不受环境字符集设置的影响<br>
<br>
<br>
试验2的一些结论:<br>
<br>
1. 所有的应用都是按照字节流=>字符流=>字节流方式进行的处理的:<br>
byte_stream ==(input decoding)==> char_stream ==output(encoding)==> byte_stream;<br>
2. 在JAVA字节流到字符流(或者反之)都是含有隐含的解码处理的(缺省是按照系统缺省编码方式);<br>
3. 最早的字节流解码过程从javac的代码编译就开始了;<br>
4. JAVA中的字符character存储单位是双字节的UNICODE;<br>
<br>
结论:<br>
<br>
过以上2个JAVA试验程序得出的一些结论:<br>
<br>
* JAVA环境是基于操作系统上的一个虚拟机应用,因此,如果操作系统遵循国际化规范:JVM的缺省编码方式可以通过修改操作系统的LOCALE设置实现。对于一个JAVA应用来说,只要将LINUX的缺省编码方式设置成GBK,其文字编码处理应该和中文Windows平台上的表现是一致的。<br>
redhat 6.X使用linux内核的是基于glibc2.1.X,不支持中文LOCALE,因此无法通过改变LOCALE设置改变JVM的缺省编码方式,linux内核2.4开始基于glibc.2.2.x,对中文LOCALE有了比较好的支持。<br>
* 不同的JVM对字符集的支持程度不同:<br>
比如:IBM的JVM1.3.0开始支持GB18030,SUN的JVM从1.4开始支持GB18030<br>
* 正确的编码方式不一定表示能正确的显示,正确的显示还要需要相应的前端显示系统(字库)的支持<br>
但对于linux上的服务应用来说,往往只要能确认字符正确的按照指定的方式编码就够了,毕竟客户端的主要是<br>
* 如果应用的是基于UNICODE的编码方式处理并使用UTF8字符集做集中存储,<br>
<br>
根据以上结论,设计一个适应多语言环境的应用,可以考虑一下2个应用处理模式:<br>
<br>
* (客户端应用或本地化应用)根据LOCALE,让JAVA应用按照系统LOCALE的缺省的字符集设置进行处理,减少应用在编码处理上的复杂程度<br>
<br>
输入 输出<br>
/<br>
根据LOCALE解码/编码<br>
|<br>
处理/存储<br>
<br>
* (服务器端或跨语言平台应用):在应用的最外端:数据输入输出判断用户语言环境,核心按照UNICODE方式处理存储。可以把各种区域性的字符集(GB2312 BIG5)看成是UNICODE的一个子集。UNICODE存储的数据可以方便的转换成任意字符集。<br>
应用使用UTF8方式存储虽然要增加了存储空间,但也可以大大简化前端应用本地化(i10n)的复杂程度。 <br>
<br>
中文输入 日文输入 中文输出 日文输出<br>
/ /<br>
判断用户语言环境:解码 判断用户语言环境:编码<br>
/<br>
中间处理过程:UNICODE<br>
|<br>
UTF8编码存储<br>
<br>
参考文档:<br>
Java的国际化设计<br>
http://java.sun.com/docs/books/tutorial/i18n/index.html<br>
<br>
linux 国际化本地化和中文化<br>
http://www.linuxforum.net/doc/i18n-new.html<br>
<br>
linux 程序员必读:中文化与GB18030标准<br>
http://www.ccidnet.com/tech/os/2001/07/31/58_2811.html<br>
<br>
Unicode FAQ<br>
http://www.cl.cam.ac.uk/~mgk25/unicode.html<br>
http://www.linuxforum.net/books/UTF-8-Unicode.html (中文版)<br>
<br>
Java 编程技术中汉字问题的分析及解决<br>
http://www-900.ibm.com/developerWorks/java/java_chinese/index.shtml<br>
<br>
汉字的编码方式:<br>
http://www.unihan.com.cn/cjk/ana17.htm<br>
<br>
不同版本的JVM支持的编码方式<br>
http://java.sun.com/j2se/1.3/docs/guide/intl/encoding.doc.html<br>
http://java.sun.com/j2se/1.4/docs/guide/intl/encoding.doc.html<br>
<br>
<br>
<br>
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href="type4.html" tppabs="http://www.linuxhero.com/docs/type4.html">shell</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>5:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type5.html" tppabs="http://www.linuxhero.com/docs/type5.html">安装启动</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>6:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type6.html" tppabs="http://www.linuxhero.com/docs/type6.html">xwindow</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>7:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type7.html" tppabs="http://www.linuxhero.com/docs/type7.html">kde</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font 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tppabs="http://www.linuxhero.com/docs/type11.html">网络配置</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>12:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type12.html" tppabs="http://www.linuxhero.com/docs/type12.html">存储备份</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>13:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type13.html" tppabs="http://www.linuxhero.com/docs/type13.html">杂项工具</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>14:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type14.html" tppabs="http://www.linuxhero.com/docs/type14.html">编程技术</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>15:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type15.html" tppabs="http://www.linuxhero.com/docs/type15.html">网络安全</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>16:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type16.html" tppabs="http://www.linuxhero.com/docs/type16.html">内核技术</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>17:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type17.html" tppabs="http://www.linuxhero.com/docs/type17.html">速度优化</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>18:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type18.html" tppabs="http://www.linuxhero.com/docs/type18.html">apache</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>19:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type19.html" tppabs="http://www.linuxhero.com/docs/type19.html">email</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>20:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type20.html" tppabs="http://www.linuxhero.com/docs/type20.html">ftp服务</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>21:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type21.html" tppabs="http://www.linuxhero.com/docs/type21.html">cvs服务</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>22:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type22.html" tppabs="http://www.linuxhero.com/docs/type22.html">代理服务</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>23:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type23.html" tppabs="http://www.linuxhero.com/docs/type23.html">samba</a></font></td> </tr> </table></td></tr><tr class=firstalt> <td noWrap width=27%> <font class=normalfont>24:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type24.html" tppabs="http://www.linuxhero.com/docs/type24.html">域名服务</a></font></td> </tr> </table></td></tr><tr class=secondalt> <td noWrap width=27%> <font class=normalfont>25:</font> </td><td noWrap width=73%> <table width=100% border=0> <tr> <td><font class=normalfont><a href="type25.html" tppabs="http://www.linuxhero.com/docs/type25.html">网络
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