NC凭证接口（Java发送流和处理返回结果）

问题描述：

　　金融行业在系统模块分为财务和业务两个系统，我公司是负责业务模块系统，NC公司负责财务系统。但是财务有时候需要生成凭证，这时候就涉及业务模块了，我方就需要写NC凭证接口。这时候就需要三方交互好，确定规则。简单的说，就是我方发送一个正确的一个XML格式的字符给NC公司，然后NC公司会判断这个XML是不是符合规则，返回一个xml格式结果。好了，不多说，其实就是写一个Java代码，发送xml格式流和获取返回的xml格式的结果处理。

    public String checkNCSendPzFlag(String sendXML) throws Exception {
        String result = "";//returne标识
        try {
            /*********将xml发送到目标服务器*****************/
            //将xml保存在本地文件夹
            String path = "F:\xml_voucher\IMP\NC.xml";
            File file = new File("F:\xml_voucher\IMP");
            file.mkdirs();//创建父文件夹
            File f2 = new File(path);
            f2.createNewFile();
            FileOutputStream fos = new FileOutputStream(f2);
            fos.write(sendXML.getBytes("utf-8"));//写入并设置编码格式
            fos.flush();
            fos.close();

            //获取Servlet连接并设置请求的方法
            String url = "http://10.68.3.5:8020/service/XChangeServlet?account=04&groupcode=1";//NC接口地址
            URL realURL = new URL(url);
            HttpURLConnection connection = (HttpURLConnection) realURL
                    .openConnection();
            connection.setDoOutput(true);
            connection.setRequestProperty("Content-type", "text/xml");
            connection.setRequestMethod("POST");
            
            //将Document对象写入连接的输出流中
            BufferedOutputStream out = new BufferedOutputStream(connection
                    .getOutputStream());
            BufferedInputStream input = new BufferedInputStream(
                    new FileInputStream(path));
            int length;
            byte[] buffer = new byte[1000];
            while ((length = input.read(buffer, 0, 1000)) != -1) {
                out.write(buffer, 0, length);
            }
            input.close();
            out.close();

            /***************从连接的输入流中取得回执信息***************/
            //输入流获取返回的xml，写入Document
            InputStream inputStream = connection.getInputStream();
            InputStreamReader isr = new InputStreamReader(inputStream, "utf-8");
            BufferedReader bufreader = new BufferedReader(isr);
            String xmlString = "";
            int c;
            while ((c = bufreader.read()) != -1) {
                System.out.print((char) c);
                xmlString += (char) c;
            }
            input.close();
            Document resDoc = DocumentHelper.parseText(xmlString);

            /************对回执结果的后续处理…************/
            //document转化为xml，并保存
            TransformerFactory tFactory = TransformerFactory.newInstance();
            Transformer transformer = tFactory.newTransformer();
            DocumentSource source = new DocumentSource(resDoc);
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            //设置文档的换行与缩进
            transformer.setOutputProperty(OutputKeys.INDENT, "YES");
            //设置日期格式
            SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMddHHmmss");
            String resFile = "E:\用友\回执目录\BkMsg_会计凭证_"
                    + fmt.format(new Date()) + ".xml";
            File resDis = new File("E:\用友\回执目录\");
            if (!resDis.exists())
                resDis.mkdirs();
            StreamResult results = new StreamResult(new File(resFile));
            transformer.transform(source, results);

            //jdom解析XML
            SAXBuilder builder = new SAXBuilder();
            org.jdom.Document doc = builder.build(new File(resFile));
            Element foo = doc.getRootElement();
            List allChildren = foo.getChildren();
            for (int i = 0; i < allChildren.size(); i++) {
                System.out.println(" 发送状态:"
                        + ((Element) allChildren.get(i)).getChild("resultcode").getText());
                System.out.print("测试信息"
                        + ((Element) allChildren.get(i)).getChild("resultdescription").getText());
            }

            if (((Element) allChildren.get(0)).getChild("resultcode").getText()
                    .equals("1")) {
                result = "导入成功!";
            } else {
                result = "导入失败:"
                        + ((Element) allChildren.get(0)).getChild(
                                "resultdescription").getText();
            }
        } catch (Exception e) {
            // TODO: handle exception
            result = "导入失败" + e.getMessage();
            e.printStackTrace();
        }
        return result;
    }