xml java端生成 工具类

package com.zyna.dbstructure;
import java.io.Writer;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;


public class XML {
	
	DocumentBuilderFactory builderFactory = null;
	
	DocumentBuilder builder = null ;
	
	Document document = null ;
	
	Element root = null ;
	
	/**
	 * 初始化一切预备参数
	 * 
	 * 编写者：lfc
	 * 
	 * @throws ParserConfigurationException
	 */
	
	public void init() throws ParserConfigurationException {
		
		builderFactory = DocumentBuilderFactory.newInstance() ;
		
		builder = builderFactory.newDocumentBuilder() ;
		
		document = builder.newDocument() ;
		
		//*******生成根节点********//
		root = document.createElement("info") ;
		
		document.appendChild(root) ;
	}
	
	
	/**
	 * 创建XML文档
	 * 
	 * @param   strs 
	 *       -------传送过来的姓名和密码和学校参数
	 * 
	 * 编写者：lfc
	 */
	public void create(String[] strs) {
		//******第一级子节点******//
		Element first = document.createElement("OperateTask") ;
		root.appendChild(first) ;
		
		for(int i=0; i<strs.length; i++) {
			if(i==0) {
				//*******第二级子节点******//
				Element ot_id = document.createElement("ot_id") ;
				ot_id.appendChild(document.createTextNode(strs[i])) ;
				first.appendChild(ot_id) ;
			} if(i==1) {
				Element ot_item = document.createElement("ot_item") ;
				ot_item.appendChild(document.createTextNode(strs[i])) ;
				first.appendChild(ot_item) ;
			} if(i==2) {
				Element ot_type = document.createElement("ot_type") ;
				ot_type.appendChild(document.createTextNode(strs[i])) ;
				first.appendChild(ot_type) ;
			}if(i == 3){
				Element ot_level = document.createElement("ot_level") ;
				ot_level.appendChild(document.createTextNode(strs[i])) ;
				first.appendChild(ot_level) ;
			}
		}
		
		System.out.println(first.getNodeValue());
		System.out.println(first.getNodeName());
	}
	
	
	public Document getDocument() {
		return document ;
	}
	
	/**
	 * 把XML文档写入到输出流
	 * 
	 * @param out
	 *       ----指定的输出流
	 * @throws Exception
	 * 
	 * 编写者：lfc
	 */
	public void output(Writer writer) throws Exception{
		Transformer trans = TransformerFactory.newInstance().newTransformer() ;
		trans.setOutputProperty(OutputKeys.ENCODING, "UTF-8") ;
		Source source = new DOMSource(document) ;
		Result result = new StreamResult(writer) ;
		trans.transform(source, result) ;
		writer.flush() ;
		writer.close() ;
	}
	
	public static void main(String[] args) throws ParserConfigurationException{
		XML xML = new XML();
		xML.init();
		System.out.println(xML.document);
	}

}