xml字符串保存xml文件或xml转换String字符串-蒲公英云

xml字符串保存xml文件或xml转换String字符串

Myth丶恋晨 2022-04-12 13:20 615阅读 0赞

废话不多说，直接上主题，先来一个xml字符串保存xml文件的方法。

/**
     * 字符串转xml文件并保存指定路径
     * @param xmlStr  xml字符串
     * @param fileName  文件名称
     * @param type  文件类型(后缀)
     * @param path  (存放路径)
     * @return
     */
@SuppressWarnings("deprecation")
    public static String createXml(String xmlStr,String fileName,String type,String path) {
            Document doc = strToDocument(xmlStr);
            String realPath = path + fileName + type;
            try {
                // 判断文件是否存在，如存在就删掉它
                File file = new File(realPath);
                if (!file.getParentFile().exists()) {
                    //如果不存在则创建
                    file.getParentFile().mkdirs();
                    logger.info("==============文件目录不存在,新建文件==============");
                }
                /** 将document中的内容写入文件中 */
                TransformerFactory tFactory = TransformerFactory.newInstance();
                Transformer transformer = tFactory.newTransformer();
                transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
                transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                DOMSource source = new DOMSource(doc);
                StreamResult result = new StreamResult(new FileOutputStream(realPath));
                transformer.transform(source, result);
            } catch (final Exception exception) {
                logger.info("更新" + fileName + "出错："+exception);
            }
            //返回文件保存路径
            return path + fileName + type;
        }
/**
     * 字符串转Document
     * @param xmlStr
     * @return
     */
     public static Document strToDocument(String xmlStr) {
            Document doc = null;
            StringReader sr = new StringReader(xmlStr);
            InputSource is = new InputSource(sr);
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder;
            try {
                builder = factory.newDocumentBuilder();
                doc = builder.parse(is);
            } catch (ParserConfigurationException e) {
                logger.info("ParserConfiguration错误"+e);
            } catch (SAXException e) {
                logger.info("SAX错误"+e);
            } catch (IOException e) {
                logger.info("IO错误"+e);
            }
            return doc;
        }

不明白请仔细看注释，可以直接复制粘贴使用；

接下来是根据路径将xml文件转换为xml字符串

/**
      * xml文件转换字符串
      * @param path
      * @return
      */
     public static String XmlFileToStr(String path){
             String xmlString = "";
            byte[] strBuffer = null;
            InputStream in = null;
            int flen = 0;
            File xmlfile = new File(path);
            try {
            in = new FileInputStream(xmlfile);
            flen = (int)xmlfile.length();
            strBuffer = new byte[flen];
            in.read(strBuffer, 0, flen);
            in.close();
            } catch (FileNotFoundException e) {
            e.printStackTrace();
            logger.info("FileNotFound错误"+e.getMessage());
            } catch (IOException e) {
            logger.info("转换IO错误"+e.getMessage());
            e.printStackTrace();
            } 
            xmlString = new String(strBuffer); //构建String时，可用byte[]类型，
            logger.info("xml文件转换后的字符串："+xmlString);
            return xmlString;
     }