Java JSP 正規式取出中文字

import java.util.regex.Matcher;
import java.util.regex.Pattern;
String str="o中文o";
String pattern="";
Pattern p=null;
Matcher m = null;
//中文字碼範圍
pattern="[\u4e00-\u9fa5]";
p=Pattern.compile(pattern);
m=p.matcher(str);
while(m.find()){
 System.out.println(m.group());
}