shell应用：批量将文件编码由gbk转utf-8

实例代码：

#!/bin/bash

// batch_change_GB2312_to_UTF-8

cd directory
find ./ -type f -name "*.java" | while read line;do
echo $line
iconv -f GB2312 -t UTF-8 $line > ${line}.utf8
mv $line ${line}.gb2312
mv ${line}.utf8 $line
done