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iconv
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===
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转换文件的编码方式
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## 说明
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**iconv命令** 是用来转换文件的编码方式的，比如它可以将UTF8编码的转换成GB18030的编码，反过来也行。JDK中也提供了类似的工具native2ascii。Linux下的iconv开发库包括iconv_open,iconv_close,iconv等C函数，可以用来在C/C++程序中很方便的转换字符编码，这在抓取网页的程序中很有用处，而iconv命令在调试此类程序时用得着
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## 选项
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```
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iconv -f encoding [-t encoding] [inputfile]...
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```
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```
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-f encoding :把字符从encoding编码开始转换。
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-t encoding :把字符转换到encoding编码。
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-l :列出已知的编码字符集合
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-o file :指定输出文件
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-c :忽略输出的非法字符
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-s :禁止警告信息，但不是错误信息
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--verbose :显示进度信息
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-f和-t所能指定的合法字符在-l选项的命令里面都列出来了。
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```
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## 实例
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列出当前支持的字符编码：
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```
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iconv -l
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```
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将文件file1转码，转后文件输出到fil2中：
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```
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iconv file1 -f EUC-JP-MS -t UTF-8 -o file2
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```
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这里，没`-o`那么会输出到标准输出
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