字符串正则匹配过滤

1.过滤字符串中的空白字符，可以移除tab，回车等空白字符

str.replaceAll("\\s+", "");

2.过滤中文标点符号

str = str.replaceAll("(?i)[^a-zA-Z0-9\u4E00-\u9FA5]", "");

3.去除 Linux的非法文件字符

public static String cleanFileName(String badFileName) {
	final int[] illegalChars = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 	34, 42, 47, 58, 60, 62, 63, 92, 124};
	StringBuilder cleanName = new StringBuilder();
	for (int i = 0; i < badFileName.length(); i++) {
	    int c = (int)badFileName.charAt(i);
	    if (Arrays.binarySearch(illegalChars, c) < 0) {
	        cleanName.append((char)c);
	    }
	}
	return cleanName.toString();
}