关于替换忽略大小写的问题

import   java.util.regex.*; String   str= "J2EE学习笔记J2ee   and   j2ee "; String   search= "j2ee "; Pattern   p   =   Pattern.compile(search,   Pattern.CASE_INSENSITIVE); Matcher   m   =   p.matcher(str); StringBuffer   sb   =   new   StringBuffer(); while   (m.find()) {         m.appendReplacement(sb,   " <font   color=\ "red\ "> "+str.substring(m.start(),   m.end())+ " </font> "); } m.appendTail(sb); System.out.println(sb.toString());