public static int count(Pattern pattern, CharSequence content) {
		if (null == pattern || null == content) {
			return 0;
		}

		int count = 0;
		final Matcher matcher = pattern.matcher(content);
		while (matcher.find()) {
			count++;
		}

		return count;
	}
public static int count ( Pattern pattern , CharSequence content ) { if ( null == pattern || null == content ) { return 0 ; } int count = 0 ; final Matcher matcher = pattern . matcher ( content ) ; while ( matcher . find ( ) ) { count ++ ; } return count ; }
计算指定字符串中，匹配pattern的个数

@param pattern 编译后的正则模式
@param content 被查找的内容
@return 匹配个数