dom4j 常用操作

1 读xml文件

    public static String read(String path) {
        
        String str = null;
        
        try {
            SAXReader reader = new SAXReader();
            Document document = reader.read(new File(path));
            str = document.asXML();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return str;
    }

2 格式化XML字符串

    /**
     *  格式化XML字符串
     */
    public static String formatXML(String str) {
        
        try {
            Document doc = DocumentHelper.parseText(str);
            
            OutputFormat format = OutputFormat.createPrettyPrint();
            format.setEncoding("utf-8");
            //format.setSuppressDeclaration(true);  // 抑制指令声明
            format.setIndent(true);
            format.setIndentSize(8);
            
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            XMLWriter writer = new XMLWriter(outputStream, format);
            
            writer.write(doc);
            writer.close();
            
            return outputStream.toString("utf-8").trim();
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return str;
    }