Solr特殊字符转义处理

转https://blog.csdn.net/lich0000/article/details/8682814

https://blog.csdn.net/wgw335363240/article/details/39889979

在Solr中，下列字符有特殊含义，需转义处理，否则查询下列字符会报查询错误。

+ – && || ! ( ) { } [ ] ^ ” ~ * ? : \ 

public static String transformSolrMetacharactor(String input){
        StringBuffer sb = new StringBuffer();
        String regex = "[+\\-&|!(){}\\[\\]^\"~*?:(\\)]";
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(input);
        while(matcher.find()){
            matcher.appendReplacement(sb, "\\\\"+matcher.group());
        }
        matcher.appendTail(sb);
        return sb.toString(); 
    }

或

https://svn.apache.org/repos/asf/lucene/dev/trunk/solr/solrj/src/java/org/apache/solr/client/solrj/util/ClientUtils.java
 
public static String escapeQueryChars(String s) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < s.length(); i++) {
      char c = s.charAt(i);
      // These characters are part of the query syntax and must be escaped
      if (c == '\\' || c == '+' || c == '-' || c == '!'  || c == '(' || c == ')' || c == ':'
        || c == '^' || c == '[' || c == ']' || c == '\"' || c == '{' || c == '}' || c == '~'
        || c == '*' || c == '?' || c == '|' || c == '&'  || c == ';' || c == '/'
        || Character.isWhitespace(c)) {
        sb.append('\\');
      }
      sb.append(c);
    }
    return sb.toString();
  }