solr 对于 关键字的特殊处理

public static String transformMetachar(String input){

     StringBuffer sb = new StringBuffer();

    try{

        String regex = "[+\-&|!(){}\[\]^"~*?:(\)\s]";

        Pattern pattern = Pattern.compile(regex);

        Matcher matcher = pattern.matcher(input);

        while(matcher.find()){

            matcher.appendReplacement(sb, "\\"+matcher.group());

        }

        matcher.appendTail(sb);

    } catch(Exception e){

        //TODO

    }

     return sb.toString();

}