格式化xml

在程序代码开发过程中，我们可能有时候需要将xml报文进行格式化一下，整理了一下，大概有两种方法：

public String formatXml(String inputXml){
        SAXReader reader = new SAXReader();
        XMLWriter writer = null;
        String requestXml = null;
        try {
            Document document = reader.read(new StringReader(inputXml));
            if(document!=null){
                StringWriter stringWriter = new StringWriter();
                OutputFormat format = new OutputFormat(" ", true);
                format.setEncoding("GBK");
                format.setNewLineAfterDeclaration(false);//设置不存在空行
                writer = new XMLWriter(stringWriter, format);
                writer.write(document);
                writer.flush();
                requestXml = stringWriter.getBuffer().toString();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (DocumentException e) {
            e.printStackTrace();
        }finally{
            if(writer!=null){
                try {
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return requestXml;
    }
    
    public void formatXml2(String inputXml){
        Format format = Format.getCompactFormat();
        format.setEncoding("UTF-8");
        format.setIndent(" ");
        XMLOutputter outputter = new XMLOutputter(format);
        org.jdom.Document document=null;
        try {
            ByteArrayOutputStream bo = new ByteArrayOutputStream(); 
            StringReader reader = new StringReader(inputXml);
            document = (new SAXBuilder()).build(reader);
            outputter.output(document, bo);
            System.out.println(bo.toString());
        } catch (JDOMException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }