生成xml选择直接输出字符串（不生成文件）和生成文件

来源：互联网发布：linux 目录权限编辑：程序博客网时间：2024/05/16 08:41
import java.io.ByteArrayOutputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.PrintWriter;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import javax.xml.transform.OutputKeys;import javax.xml.transform.Result;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerConfigurationException;import javax.xml.transform.TransformerException;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;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.xml.sax.SAXException; class XmlImpl{    private Document document;     public void init() {        try {            DocumentBuilderFactory factory = DocumentBuilderFactory                    .newInstance();            DocumentBuilder builder = factory.newDocumentBuilder();            this.document = builder.newDocument();        } catch (ParserConfigurationException e) {            System.out.println(e.getMessage());        }    }     public void createXml(String fileName) {      Element root = this.document.createElement("scores");          this.document.appendChild(root);          Element employee = this.document.createElement("employee");          Element name = this.document.createElement("name");          name.appendChild(this.document.createTextNode("wangchenyang"));          employee.appendChild(name);          Element sex = this.document.createElement("sex");          sex.appendChild(this.document.createTextNode("m"));          employee.appendChild(sex);          Element age = this.document.createElement("age");          age.appendChild(this.document.createTextNode("26"));          employee.appendChild(age);          root.appendChild(employee);         TransformerFactory tf = TransformerFactory.newInstance();        try {            Transformer transformer = tf.newTransformer();            DOMSource source = new DOMSource(document);            transformer.setOutputProperty(OutputKeys.ENCODING, "gb2312");            transformer.setOutputProperty(OutputKeys.INDENT, "yes");            //直接输出字符串，不写入文件            ByteArrayOutputStream outStream = new ByteArrayOutputStream();            OutputStreamWriter write = new OutputStreamWriter(outStream);            Result result = new StreamResult(write);            Transformer xformer = TransformerFactory.newInstance()            .newTransformer();//            xformer.setOutputProperty(OutputKeys.ENCODING, "gb2312");            xformer.setOutputProperty(OutputKeys.STANDALONE, "yes");            xformer.transform(source, result);            System.out.println(outStream.toString());                        //生成文件            PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));//            StreamResult result = new StreamResult(pw);            transformer.transform(source, result);            System.out.println("生成XML文件成功!");        } catch (TransformerConfigurationException e) {            System.out.println(e.getMessage());        } catch (IllegalArgumentException e) {            System.out.println(e.getMessage());        } catch (FileNotFoundException e) {            System.out.println(e.getMessage());        } catch (TransformerException e) {            System.out.println(e.getMessage());        }    }     public void parserXml(String fileName) {        try {            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();            DocumentBuilder db = dbf.newDocumentBuilder();            Document document = db.parse(fileName);                         NodeList employees = document.getChildNodes();            for (int i = 0; i < employees.getLength(); i++) {                Node employee = employees.item(i);                NodeList employeeInfo = employee.getChildNodes();                for (int j = 0; j < employeeInfo.getLength(); j++) {                    Node node = employeeInfo.item(j);                    NodeList employeeMeta = node.getChildNodes();                    for (int k = 0; k < employeeMeta.getLength(); k++) {                        System.out.println(employeeMeta.item(k).getNodeName()                                + ":" + employeeMeta.item(k).getTextContent());                    }                }            }            System.out.println("解析完毕");        } catch (FileNotFoundException e) {            System.out.println(e.getMessage());        } catch (ParserConfigurationException e) {            System.out.println(e.getMessage());        } catch (SAXException e) {            System.out.println(e.getMessage());        } catch (IOException e) {            System.out.println(e.getMessage());        }    }}public class xmLTest {     public static void main(String args[]){        XmlImpl dd=new XmlImpl();        String str="D:/grade.xml";        dd.init();        dd.createXml(str);    //创建xml        dd.parserXml(str);    //读取xml    }}
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