Servlet利用SAX解析XML文档(新上传的有源码)

package cn.edu.hld.mysax; import java.io.IOException; import java.util.Iterator; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.xml.sax.InputSource; import org.xml.sax.SAXException; public class MySAXParserServlet extends HttpServlet { /* * 使用SAX解析要求3件事:事件处理器(MyHandler),解析器实例(SAXParser),将要解析的XML文档(content.xml) * Servlet的线程安全:基于Servlet的应用程序本来就是多线程的,因此当使用Servlet时记住多线程是重要的 * SAX不是线程安全的,虽然可以重复使用它来解析几个文档,但不能够重复使用它同时解析几个XML文档 * 因此Servlet的get()方法构造新的解析器来满足每个用户请求 * SAXParserFactory的newSAXParser()声明为线程安全的,所以可以在线程之间共享SAXParserFactory,Servlet仅维护一个工厂对象 */ private SAXParserFactory parserFactory ; @Override protected void doPost(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException { doGet(arg0,arg1) ; } @Override public void init() throws ServletException { try { parserFactory = SAXParserFactory.newInstance() ; } catch(Exception e) { e.printStackTrace() ; } } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { MyHandler myHandler = new MyHandler() ; SAXParser parser = null ; try { parser = parserFactory.newSAXParser() ; } catch (ParserConfigurationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } //提供XML文档 String xmlDir = this.getServletConfig().getServletContext().getRealPath("/") ; //从web.xml中对servlet配置处读取相应的xml相对路径 xmlDir += this.getInitParameter("myxmlconfig") ; InputSource inputSource = new InputSource(xmlDir) ; try { parser.parse(inputSource, myHandler) ; } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } List itemList = myHandler.getItemList() ; request.setAttribute("itemList", itemList) ; Iterator<Item> it = itemList.iterator() ; while(it.hasNext()) { Item item = it.next() ; System.out.println(item.getName() + ":" + item.getValue()); } /* 输出结果为: thtwinj2ee:测试用数据一 thtwin:测试用数据二 */ request.getRequestDispatcher("../index.jsp").forward(request, response) ; } }