将DOM元素编码从CP1251转换为UTF8

Question

我有一个简单的服务器端代码，它接受请求xml并将其作为字符串插入到Oracle数据库的Clob列中。问题是客户端发送的请求xml使用CP1251编码的文本，但我需要将其插入到使用UTF8编码的Oracle中。现在我为CP1251使用的代码是：

        Element soapinElement = (Element) streams.getSoapin().getValue().getAny();  //retrieve request xml      
        Node node = (Node) soapinElement;
        Document document = node.getOwnerDocument();
        DOMImplementationLS domImplLS = (DOMImplementationLS) document.getImplementation();         
        LSSerializer serializer = domImplLS.createLSSerializer();
        LSOutput output = domImplLS.createLSOutput();
        output.setEncoding("CP1251");
        Writer stringWriter = new StringWriter();
        output.setCharacterStream(stringWriter);
        serializer.write(document, output);
        String soapinString = stringWriter.toString();

此代码可识别以CP1251编码的文本。任务是使用UTF-8编码的可读文本来制作相同的文本。请提出任何建议。

我试过了，但它产生了不可读的字符，而不是西里尔字母：

        Element soapinElement = (Element)   streams.getSoapin().getValue().getAny();            
        Node node = (Node) soapinElement;
        Document document = node.getOwnerDocument();
        DOMImplementationLS domImplLS = (DOMImplementationLS) document.getImplementation();         
        LSSerializer serializer = domImplLS.createLSSerializer();
        LSOutput output = domImplLS.createLSOutput();
        output.setEncoding("CP1251");
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        output.setByteStream(byteArrayOutputStream);
        serializer.write(document, output);
        byte[] result = byteArrayOutputStream.toByteArray();
        InputStream is = new ByteArrayInputStream(result);
        Reader reader = new InputStreamReader(is, "CP1251");
        OutputStream out = new ByteArrayOutputStream();
        Writer writer = new OutputStreamWriter(out, "UTF-8");
        char[] buffer = new char[10];
        int read;
        while ((read = reader.read(buffer)) != -1) {
            writer.write(buffer, 0, read);
        }           
        reader.close();
        writer.close();
        String soapinString = out.toString();

Answer 1

您可以解码CP1251字符集数据，如下所示

Charset utf8charset = Charset.forName("UTF-8");
Charset cp1251charset = Charset.forName("CP1251");

// decode CP1251
        CharBuffer data = cp1251charset.decode(ByteBuffer.wrap(result));

并编码为UTF-8字符集

// encode UTF-8
        ByteBuffer outputBuffer = utf8charset.encode(data);

并将ByteBuffer转换为byte[]

// UTF-8 Value        
        byte[] outputData = outputBuffer.array();

这可能会解决你的问题。