由於每一個找到的字元需要經過decode的處理，所以不適用replaceAll方法來處理。
以下找到符合的處理方法：
Reference:http://stackoverflow.com/questions/5568081/regex-replace-all-ignore-case
Avoid ruining the original capitalization:
In the above approach however, you're ruining the capitalization of the replaced word. Here is a better suggestion:
String inText="Sony Ericsson is a leading company in mobile. " +
"The company sony ericsson was found in oct 2001";
String word = "sony ericsson";
Pattern p = Pattern.compile(word, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(inText);
StringBuffer sb = new StringBuffer();
while (m.find()) {
String replacement = m.group().replace(' ', '~');
m.appendReplacement(sb, Matcher.quoteReplacement(replacement));
}
m.appendTail(sb);
String outText = sb.toString();
System.out.println(outText);
Output:
Sony~Ericsson is a leading company in mobile.
The company sony~ericsson was found in oct 2001
