XML的四種寫入方式
阿新 • • 發佈：2017-09-02
ner mls src oms utf-8 gen log 遍歷 return
DOM方式生成XML：
<?xml version="1.0" encoding="UTF-8"?><bookStore> <book id="1"> <name>冰與火之歌</name> <author>喬治馬丁</author> <year>2014</year> <price>89</price> </book> <book id="2"> <name>安徒生童話</name> <year>2004</year> <price>77</price> <language>English</language> </book> </bookStore>
import java.io.File; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys;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; public class Demo { /** * 創建DocumentBuilder * @return */ public DocumentBuilder getDocuementBuilder() { // 創建一個DocumentBuilderFactory的對象 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); // 創建DocumentBuilder對象 DocumentBuilder db = null; try { db = dbf.newDocumentBuilder(); } catch (ParserConfigurationException e) { e.printStackTrace(); } return db; } /** * 生成xml */ public void createXML() { DocumentBuilder db = getDocuementBuilder(); Document doc = db.newDocument(); // 創建DOM樹 doc.setXmlStandalone(true); // 設置xml文件聲明中的standalone="yes"並不顯示 Element bookstore = doc.createElement("bookStore"); //創建根節點 //向bookstore根節點中添加子節點book //**************************添加第一個book節點*********************************** Element book = doc.createElement("book"); book.setAttribute("id", "1"); // 設置name節點的值並添加到book節點下 Element name = doc.createElement("name"); name.setTextContent("冰與火之歌"); book.appendChild(name); // 設置author節點的值並添加到book節點下 Element author = doc.createElement("author"); author.setTextContent("喬治馬丁"); book.appendChild(author); // 設置year節點的值並添加到book節點下 Element year = doc.createElement("year"); year.setTextContent("2014"); book.appendChild(year); // 設置price節點的值並添加到book節點下 Element price = doc.createElement("price"); price.setTextContent("89"); book.appendChild(price); //將book節點添加到bookstore中 bookstore.appendChild(book); //**************************添加第二個book節點*********************************** // 向bookstore根節點中添加第二個book子節點 Element book2 = doc.createElement("book"); book2.setAttribute("id", "2"); Element name2 = doc.createElement("name"); name2.setTextContent("安徒生童話"); book2.appendChild(name2); Element year2 = doc.createElement("year"); year2.setTextContent("2004"); book2.appendChild(year2); Element price2 = doc.createElement("price"); price2.setTextContent("77"); book2.appendChild(price2); Element language = doc.createElement("language"); language.setTextContent("English"); book2.appendChild(language); bookstore.appendChild(book2); //將根節點bookstore添加到DOM樹中 doc.appendChild(bookstore); //創建TransformerFactory對象 TransformerFactory tff = TransformerFactory.newInstance(); try { //創建Transformer對象 Transformer tf = tff.newTransformer(); tf.setOutputProperty(OutputKeys.INDENT, "yes"); // 設置生成的xml文件格式（換行） tf.transform(new DOMSource(doc), new StreamResult(new File("books1.xml"))); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (TransformerException e) { e.printStackTrace(); } } /** * main */ public static void main(String[] args) { Demo demo = new Demo(); // 調用createXML()方法 demo.createXML(); } }
SAX方式生成XML：
import java.util.ArrayList; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class SAXParserHandler extends DefaultHandler { String value = null; Book book = null; private ArrayList<Book> bookList = new ArrayList<Book>(); public ArrayList<Book> getBookList() { return bookList; } int bookIndex = 0; /** * 用來遍歷xml文件的開始標簽 */ public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { //調用DefaultHandler類的startElement方法 super.startElement(uri, localName, qName, attributes); //開始解析book元素的屬性 if(qName.equals("book")){ //創建一個Book對象 book = new Book(); bookIndex++; //已知book元素下屬性名稱，根據屬性名獲取屬性值 System.out.println("***********開始遍歷第"+bookIndex+"本書的內容***********"); /*String value = attributes.getValue("id"); System.out.println("book的屬性值是："+value);*/ int num = attributes.getLength(); for(int i=0;i<num;i++){ System.out.print("book元素的第"+(i+1)+"屬性名是："+attributes.getQName(i)); System.out.println("==>屬性值是："+attributes.getValue(i)); if(attributes.getQName(i).equals("id")){ book.setId(attributes.getValue(i)); } } }else if(!qName.equals("book") && !qName.equals("bookstore")){ System.out.print("節點名是："+qName+"==>"); } } /** * 用來遍歷xml文件的結束標簽 */ public void endElement(String uri, String localName, String qName) throws SAXException { //調用DefaultHandler類的endElement方法 super.endElement(uri, localName, qName); //判斷是否針對一本書已經遍歷結束 if(qName.equals("book")){ bookList.add(book); book = null; System.out.println("***********結束遍歷第"+bookIndex+"本書的內容***********"); }else if(qName.equals("name")){ book.setName(value); }else if(qName.equals("author")){ book.setAuthor(value); }else if(qName.equals("year")){ book.setYear(value); }else if(qName.equals("price")){ book.setPrice(value); }else if(qName.equals("language")){ book.setLanguage(value); } } /** * 用來標識解析開始 */ public void startDocument() throws SAXException { super.startDocument(); System.out.println("SAX解析開始"); } /** * 用來標識解析結束 */ public void endDocument() throws SAXException { super.endDocument(); System.out.println("SAX解析結束"); } /** * */ public void characters(char[] ch, int start, int length) throws SAXException { super.characters(ch, start, length); value = new String(ch, start, length); if(!value.trim().equals("")){ System.out.println("節點值是："+value); } } }
import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.sax.SAXTransformerFactory; import javax.xml.transform.sax.TransformerHandler; import javax.xml.transform.stream.StreamResult; import org.xml.sax.SAXException; import org.xml.sax.helpers.AttributesImpl; public class Demo { public ArrayList<Book> parserXML() { // 獲取一個SAXParserFactory對象 SAXParserFactory factory = SAXParserFactory.newInstance(); // 通過factory獲取SAXParser對象 SAXParserHandler handler = null; try { SAXParser parser = factory.newSAXParser(); // 創建SAXParserHandler對象 handler = new SAXParserHandler(); parser.parse("books1.xml", handler); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return handler.getBookList(); } /** * 生成XML文件 */ public void createXML(){ ArrayList<Book> bookList = parserXML(); // 生成xml // 1.創建一個SAXTransformerfactory類的對象 SAXTransformerFactory tff = (SAXTransformerFactory) SAXTransformerFactory.newInstance(); try { // 2.通過SAXTransformerFactory對象創建一個TransformerHandler對象 TransformerHandler handler = tff.newTransformerHandler(); // 3.通過handler對象創建一個Transformer對象 Transformer tf = handler.getTransformer(); // 4.通過Transformer對象對生成的xml文件進行設置 // 設置xml的編碼格式 tf.setOutputProperty(OutputKeys.ENCODING, "gb2312"); // 設置xml“是否換行” tf.setOutputProperty(OutputKeys.INDENT, "yes"); // 5.創建一個Result對象 File file = new File("sax_books.xml"); if(!file.exists()){ file.createNewFile(); } // 6.創建Result對象，並且使其與handler關聯 Result result = new StreamResult(new FileOutputStream(file)); handler.setResult(result); // 7.利用handler進行xml文件內容的編寫 // 打開document handler.startDocument(); AttributesImpl attr = new AttributesImpl(); handler.startElement("", "", "bookstore", attr); for (Book book : bookList) { attr.clear(); attr.addAttribute("", "", "id", "", "1"); handler.startElement("", "", "book", attr); if(book.getName() != null && !book.getName().trim().equals("")){ attr.clear(); handler.startElement("", "", "name", attr); handler.characters(book.getName().toCharArray(), 0, book.getName().length()); handler.endElement("", "", "name"); } if(book.getAuthor() != null && !book.getAuthor().trim().equals("")){ attr.clear(); handler.startElement("", "", "author", attr); handler.characters(book.getAuthor().toCharArray(), 0, book.getAuthor().length()); handler.endElement("", "", "author"); } if(book.getYear() != null && !book.getYear().trim().equals("")){ attr.clear(); handler.startElement("", "", "year", attr); handler.characters(book.getYear().toCharArray(), 0, book.getYear().length()); handler.endElement("", "", "year"); } if(book.getPrice() != null && !book.getPrice().trim().equals("")){ attr.clear(); handler.startElement("", "", "price", attr); handler.characters(book.getPrice().toCharArray(), 0, book.getPrice().length()); handler.endElement("", "", "price"); } if(book.getLanguage() != null && !book.getLanguage().trim().equals("")){ attr.clear(); handler.startElement("", "", "language", attr); handler.characters(book.getLanguage().toCharArray(), 0, book.getLanguage().length()); handler.endElement("", "", "language"); } handler.endElement("", "", "book"); } handler.endElement("", "", "bookstore"); // 關閉document handler.endDocument(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * main */ public static void main(String[] args) { Demo demo = new Demo(); demo.createXML(); } }
JDOM方式生成XML：
import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import org.jdom2.CDATA; import org.jdom2.Document; import org.jdom2.Element; import org.jdom2.output.Format; import org.jdom2.output.XMLOutputter; public class Demo { private void createXML(){ // 1.生成一個根節點 Element rss = new Element("rss"); // 2.為節點添加屬性 rss.setAttribute("version", "2.0"); // 3.生成一個document對象 Document doc = new Document(rss); Element channel = new Element("channel"); rss.addContent(channel); Element title = new Element("title"); title.setText("<![CDATA[上海移動互聯網產業促進中心正式揭牌 ]]>"); //CDATA text = new CDATA("<![CDATA[上海移動互聯網產業促進中心正式揭牌 ]]>"); //title.addContent(text); channel.addContent(title); Format format = Format.getPrettyFormat(); //format.setEncoding("UTF-8"); //設置換行 format.setIndent(""); // 4.創建XMLOutputter對象 XMLOutputter outputter = new XMLOutputter(format); try { // 5.利用outputter將doc對象轉換成xml文件 outputter.output(doc, new FileOutputStream(new File("jdom_rssnews.xml"))); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * main */ public static void main(String[] args) { new Demo().createXML(); } }
DOM4J方式生成XML：
import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.UnsupportedEncodingException; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.XMLWriter; public class Demo { private void createXML() { // 1.創建document對象，代表整個xml文檔 Document doc = DocumentHelper.createDocument(); // 2.創建根節點rss Element rss = doc.addElement("rss"); // 3.向rss節點中添加version屬性 rss.addAttribute("version", "2.0"); // 4.生成子節點及節點內容 Element channel = rss.addElement("channel"); Element title = channel.addElement("title"); title.setText("<![CDATA[上海移動互聯網產業促進中心正式揭牌 ]]>"); // 5.設置生成xml文件格式 OutputFormat format = OutputFormat.createPrettyPrint(); //format.setEncoding("UTF-8"); // 6.生成xml文件 File file = new File("dom4j_rssnews.xml"); XMLWriter writer = null; try { writer = new XMLWriter(new FileOutputStream(file), format); // 設置是否轉義，默認值時true，代表轉義 writer.setEscapeText(false); writer.write(doc); writer.close(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } /** * main */ public static void main(String[] args) { new Demo().createXML(); } }
XML的四種寫入方式