关于XML字符串中出现非法字符导致解析出错的问题

最近调用接口报大量错误org.apache.cxf.interceptor.Fault: Marshalling Error:
Invalid white space character (0x2) in text to output (in xml 1.1, could output as a character entity)，根据提示可知出现了非法字符导致解析出错。查看日志果真如此，由于使用的是XML1.0，所以需要对报文字符串进行过滤，根据xml1.0规范https://www.w3.org/TR/REC-xml/可知xml1.0字符集范围如下Char  
    ::=       #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]。于是进行字符串过滤

public static String xmlFilter(String str){
StringBuffer out = new StringBuffer();
char current;
for (int i = 0; i < str.length(); i++) {
current = str.charAt(i);
if ((current == 0x9) || (current == 0xA) || (current == 0xD)
|| ((current >= 0x20) && (current <= 0xD7FF))
|| ((current >= 0xE000) && (current <= 0xFFFD))
|| ((current >= 0x10000) && (current <= 0x10FFFF)))
out.append(current);
}
return out.toString();
}