String regEx="[\n`~!@#$%^&*()+=|{}':;',\\[\\].<>/?~！@#￥%……&*（）——+|{}【】‘；：”“’。， 、？]";
// You can add any character you want to replace in the brackets, it is actually a regular expression
String aa = ""; // this is a special character string replaced aa, "" represents a direct removed
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher ( "original string"); // where you wish to replace the string passed in
String newString = m.replaceAll(aa).trim();
// the replacement string is present in the variable newString
Method Two
If the first too much trouble can directly use the following
String str = "original string";
String newString = str.replaceAll (regEX, aa); // do not want to retain the original string can be directly written "str = str.replaceAll (regEX, aa);"