Java Web对前台传过来参数中的敏感字符进行过滤替换

public static String filterHtml(String input){if(input == null){return null;}if(input.length() == 0){return input;}input = input.replaceAll("&", "&");input = input.replaceAll("<", "≶");input = input.replaceAll(">", ">");input = input.replaceAll(" ", " ");input = input.replaceAll("'", "'");input = input.replaceAll("\"", """);return input.replaceAll("\n", "<br>");}