iconv转换文件编码

iconv的用法：

bowen@localhost ~$ iconv --helpUsage: iconv [OPTION...] [-f ENCODING] [-t ENCODING] [INPUTFILE...]or:    iconv -lConverts text from one encoding to another encoding.Options controlling the input and output format:  -f ENCODING, --from-code=ENCODING                              the encoding of the input  -t ENCODING, --to-code=ENCODING                              the encoding of the outputOptions controlling conversion problems:  -c                          discard unconvertible characters  --unicode-subst=FORMATSTRING                              substitution for unconvertible Unicode characters  --byte-subst=FORMATSTRING   substitution for unconvertible bytes  --widechar-subst=FORMATSTRING                              substitution for unconvertible wide charactersOptions controlling error output:  -s, --silent                suppress error messages about conversion problemsInformative output:  -l, --list                  list the supported encodings  --help                      display this help and exit  --version                   output version information and exitReport bugs to <[e-mail]>.

例：iconv -f GB2312 -t UTF-8 test1.txt > test2.txt　
将test1.txt里的编码从GB2312转化成UTF-8 并重定向到test2.txt