转义特殊字符的几种方法

//转义
private 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();
}

//Lucene escape method
public static String escape(String s) {
StringBuilder sb = new StringBuilder();

for(int i = 0; i < s.length(); ++i) {
char c = s.charAt(i);
if(c == 92 || c == 43 || c == 45 || c == 33 || c == 40 || c == 41 || c == 58 || c == 94 || c == 91 || c == 93 || c == 34 || c == 123 || c == 125 || c == 126 || c == 42 || c == 63 || c == 124 || c == 38 || c == 47) {
sb.append('\\');
}

sb.append(c);
}

return sb.toString();
}

//replace special characters with space
s = s.replaceAll("\\pP", "");