案例：
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <script type="text/javascript" src="<%=path%>/script/jquery-1.8.3.min.js"></script> <script type="text/javascript"> function sendXML(){ var xmlStr = "<driverInfo>"; xmlStr = xmlStr + "<driverClassName>com.sqlserver.driver.SQLServerDriver</driverClassName>"; xmlStr = xmlStr + "<url>jdbc:sqlserver://127.0.0.1:xxx</url>"; xmlStr = xmlStr + "<username>sa</username>"; xmlStr = xmlStr + "<password>1</password>"; xmlStr = xmlStr + "</driverInfo>"; var data={ "xmlStr":xmlStr }; var sendURL="<%=path%>/servlet/xmlSevlet?date=" + new Date() + ""; jQuery.post(sendURL, data, function(xmlData) { //从服务端接收到一个xml对象 var userArray = xmlData.getElementsByTagName("userinfo"); var optionHTML=""; for (var i = 0; i < userArray.length; i++) { var userElement=userArray[i]; var userid=userElement.getAttribute("userid"); var username=userElement.getElementsByTagName("username")[0].firstChild.nodeValue; var age=userElement.getElementsByTagName("age")[0].firstChild.nodeValue; optionHTML=optionHTML+"<option value="+userid+">"+username+"="+age+"</option>"; $("#userselect").html(optionHTML); //改变id为userselect的标签的内容 } }, "xml"); } </script> </head> <body> 使用ajax来发送与接收XML的数据 <input type="button" name="button1" id="button1" value="发送与接收XML" onclick="sendXML();" /> <select id="userselect" style=" 200px;"></select> </body> </html>
XmlServlet.java
package servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.DocumentHelper; import org.dom4j.Element; public class XmlSevlet extends HttpServlet { /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); // 获取客户端传过来的xml字符串，并解析为xml对象 String xml_str = request.getParameter("xmlStr"); try { Document document = DocumentHelper.parseText(xml_str); Element rootElement = document.getRootElement(); Element element1 = rootElement.element("driverClassName"); Element element2 = rootElement.element("url"); Element element3 = rootElement.element("username"); Element element4 = rootElement.element("password"); System.out.println(element1.getText()); System.out.println(element2.getText()); System.out.println(element3.getText()); System.out.println(element4.getText()); } catch (DocumentException e) { e.printStackTrace(); } /** * 要返回一个XML的字符串。客户端的jQuery接收到之后，会自动将XML的字符串转为XML的文档对象。 * 因为JQuery。post(,,,"xml") 会把返回的字符串对象转为xml对象 */ PrintWriter out = response.getWriter(); StringBuffer str_xml = new StringBuffer(); str_xml.append("<root>"); for (int i = 0; i < 5; i++) { str_xml.append("<userinfo userid=""+i+"">"); str_xml.append("<username>用户"+i+"</username>"); str_xml.append("<age>12</age>"); str_xml.append("</userinfo>"); } str_xml.append("</root>"); out.print(str_xml.toString()); System.out.println(str_xml.toString()); out.flush(); out.close(); } }
结果：
本章所有代码都在： 链接