在Android里面使用正则有性能隐患

public static int findKeyWordCount(String srcText, String keyword) {
int count = 0;
Pattern p = Pattern.compile(keyword);
Matcher m = p.matcher(srcText);
while (m.find()) {
count++;
}
return count;
}

public static int getSubCount(String str, String key) {
int count = 0;
int index = 0;
while ((index = str.indexOf(key, index)) != -1) {
index = index + key.length();
count++;
}
return count;
}