import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class Test {

    public static void generate(){
        try {

            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document document = builder.newDocument();
            document.setXmlVersion("1.0");
            document.setXmlStandalone(true);
            
            Element root = document.createElement_x("MobileNet");       //创建根节点   
            document.appendChild(root);                               //将根节点添加到Document对象中
            
            Element pageElement = document.createElement_x("page");     //设置第一个page元素到
            pageElement.setAttribute("name", "list.jsp");             //设置page节点的name属性

            Element methodElement = document.createElement_x("method");   //设置method节点
            methodElement.setTextContent("get");                        //给method设置值
            pageElement.appendChild(methodElement);                     //添加method节点到page节点内

            Element displayElement = document.createElement_x("display");    //设置method节点
            displayElement.setTextContent("list");                         //给display设置值
            pageElement.appendChild(displayElement);            //添加display节点到page节点内
            
            Element request_paramElement = document.createElement_x("request_param");
            request_paramElement.setTextContent("request_param1|request_param2");
            pageElement.appendChild(request_paramElement);
            
            root.appendChild(pageElement);
            pageElement = document.createElement_x("page");                    //设置第二个page元素到
            pageElement.setAttribute("name", "content.jsp");                 //设置page节点的name属性

            methodElement = document.createElement_x("method");
            methodElement.setTextContent("post");
            
            pageElement.appendChild(methodElement);
            displayElement = document.createElement_x("display");
            displayElement.setTextContent("content");
            
            pageElement.appendChild(displayElement);
            
            Element url_titleElement = document.createElement_x("url_title");        //设置url_title节点
            url_titleElement.setTextContent("title,publisher,published_calendar"); //给url_title设置值
            pageElement.appendChild(url_titleElement);                             //添加url_title节点到page节点内

            root.appendChild(pageElement);                                         //将page段加人根节点内

            TransformerFactory transFactory = TransformerFactory.newInstance();     //开始把Document映射到文件
            Transformer transFormer = transFactory.newTransformer();
            transFormer.setOutputProperty("{/encoding/}","GB2312/");    // 转码
            DOMSource domSource = new DOMSource(document);                           //设置输出结果

            // 1. 生成本地文件，写入文件流(1种文件形式)
            File file = new File("MobileNetRule.xml"); //生成xml文件
            if (!file.exists()) {
                file.createNewFile();
            }          
            FileOutputStream out = new FileOutputStream(file);          //文件输出流            
            StreamResult xmlResult = new StreamResult(out);            //设置输入源               
            transFormer.transform(domSource, xmlResult);              //输出xml文件            
              
            
            // 2.生成到文件服务器上，写入流(2种流形式)
            ByteArrayOutputStream bo  = new ByteArrayOutputStream();  // 数据写入流中
            t.transform(new DOMSource(document), new StreamResult(bo));  // 数据写入流中 或者文件             
            // new ByteArrayInputStream(bo.toByteArray())  流相互转换
            
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}