android 中 xml 解析技術之 sax解析

第一步：定義一個類繼承至DefaultHandler  如下：
 package com.tops.xml; import org.xml.sax.Attributes; import org.xml.sax.SAXException; import org.xml.sax.helpers.DefaultHandler; public class MyContentHandler extends DefaultHandler { String hisname, address, money, sex, status; String tagName; //開始解析xml代碼的會促發這個事件 public void startDocument() throws SAXException { System.out.println("````````begin````````"); } //結束解析xml代碼的會促發這個事件 public void endDocument() throws SAXException { System.out.println("````````end````````"); } //開始接續 xml 標籤時候會促發這個事件，其中localName 指的是標籤名稱，qName表示標籤前綴，attr表示屬性 public void startElement(String namespaceURI, String localName, String qName, Attributes attr) throws SAXException { tagName = localName; if (localName.equals("worker")) { //獲取標籤的全部屬性 for (int i = 0; i < attr.getLength(); i++) { System.out.println(attr.getLocalName(i) + "=" + attr.getValue(i)); } } } //結束節點解析時 會促發這個事件 public void endElement(String namespaceURI, String localName, String qName) throws SAXException { //在workr標籤解析完之後，會打印出所有得到的數據 tagName = ""; if (localName.equals("worker")) { this.printout(); } } //閱讀xml的節點裏面的內容的時候會促發這個事件 public void characters(char[] ch, int start, int length) throws SAXException { if (tagName.equals("name")) hisname = new String(ch, start, length); else if (tagName.equals("sex")) sex = new String(ch, start, length); else if (tagName.equals("status")) status = new String(ch, start, length); else if (tagName.equals("address")) address = new String(ch, start, length); else if (tagName.equals("money")) money = new String(ch, start, length); } private void printout() { System.out.print("name: "); System.out.println(hisname); System.out.print("sex: "); System.out.println(sex); System.out.print("status: "); System.out.println(status); System.out.print("address: "); System.out.println(address); System.out.print("money: "); System.out.println(money); System.out.println(); } }

 

再接下來創建一個解析器 如下：

 

//創建一個SAXParserFactory SAXParserFactory factory = SAXParserFactory.newInstance(); XMLReader reader = factory.newSAXParser().getXMLReader(); //爲XMLReader設置內容處理器,剛纔我們定義的 reader.setContentHandler(new MyContentHandler()); //開始解析文件 reader.parse(new InputSource(new StringReader(strXmlContent)));