Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.UnsupportedEncodingException;

public class Main {
    /**
     * Gets the encoding of xml byte array.
     *
     * @param xmlData
     *            the xml data
     * @return the encoding of xml byte array
     * @throws Exception
     *             the exception
     */
    public static String getEncodingOfXmlByteArray(byte[] xmlData) throws Exception {
        String encodingAttributeName = "ENCODING";
        try {
            String first50CharactersInUtf8UpperCase = new String(xmlData, "UTF-8").substring(0, 50).toUpperCase();
            if (first50CharactersInUtf8UpperCase.contains(encodingAttributeName)) {
                int encodingstart = first50CharactersInUtf8UpperCase.indexOf(encodingAttributeName)
                        + encodingAttributeName.length();

                int contentStartEinfach = first50CharactersInUtf8UpperCase.indexOf("'", encodingstart);
                int contentStartDoppelt = first50CharactersInUtf8UpperCase.indexOf("\"", encodingstart);
                int contentStart = Math.min(contentStartEinfach, contentStartDoppelt);
                if (contentStartEinfach < 0) {
                    contentStart = contentStartDoppelt;
                }
                if (contentStart < 0) {
                    throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
                }
                contentStart = contentStart + 1;

                int contentEndSingle = first50CharactersInUtf8UpperCase.indexOf("'", contentStart);
                int contentEndDouble = first50CharactersInUtf8UpperCase.indexOf("\"", contentStart);
                int contentEnd = Math.min(contentEndSingle, contentEndDouble);
                if (contentEndSingle < 0) {
                    contentEnd = contentEndDouble;
                }
                if (contentEnd < 0) {
                    throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
                }

                String encodingString = first50CharactersInUtf8UpperCase.substring(contentStart, contentEnd);
                return encodingString;
            } else {
                throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
            }
        } catch (UnsupportedEncodingException e) {
            throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
        }
    }
}