I have the following problem regarding XML encoding:
Erro: Byte inválido 2 da sequência UTF-8 do byte 3.
This error occurs when trying to canonize an XML.
I do not know exactly what the error might be, I guess it's because the String has the BOM character, so, could anyone tell me if there is a function or library in Java to identify if the XML is BOM? Or some function that removes the BOM?
You can use the apache library BomInpustStream that she does this job for you, I had this problem, and I can tell you with confidence, that using this library is easier for you. A tip since I've also manipulated XML , you should get the contents with bytes vector, check with the suggested API, and then transform the String into charset UTF-8 , just so you will not lose the graphical accent.
Excerpt to transform source into inputStream
String source = FileUtil.takeOffBOM(IOUtils.toInputStream(attachment.getValue()));
Method to get BOM
public static String takeOffBOM(InputStream inputStream) throws IOException {
BOMInputStream bomInputStream = new BOMInputStream(inputStream);
return IOUtils.toString(bomInputStream, "UTF-8");
}
I have adapted the class below the article found in the link: Removing BOM character from a String in Java
import java.io.UnsupportedEncodingException;
public class BOM {
private String bomString = "";
private final static String ISO_ENCODING = "ISO-8859-1";
private final static String UTF8_ENCODING = "UTF-8";
private final static int UTF8_BOM_LENGTH = 3;
public void BOM(String text) throws UnsupportedEncodingException {
this.bomString = text;
}
public String removeBOM() {
final byte[] bytes = this.bomString.getBytes(ISO_ENCODING);
if (isUTF8(bytes)) {
return SkippedBomString(bytes);
} else {
return this.bomString;
}
}
private String getSkippedBomString(final byte[] bytes) throws UnsupportedEncodingException {
int length = bytes.length - UTF8_BOM_LENGTH;
byte[] barray = new byte[length];
System.arraycopy(bytes, UTF8_BOM_LENGTH, barray, 0, barray.length);
return new String(barray, ISO_ENCODING);
}
private boolean isUTF8(byte[] bytes) {
if ((bytes[0] & 0xFF) == 0xEF &&
(bytes[1] & 0xFF) == 0xBB &&
(bytes[2] & 0xFF) == 0xBF) {
return true;
}
return false;
}
}