xmlparamrequestexample.java

《ajax编程技术与实例》的所有的案例

/*
 * 创建日期 2006-9-4
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package test;

/**
 * @author wufenghanren
 * 
 * TODO 要更改此生成的类型注释的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */

import java.io.*;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class XmlParamRequestExample extends HttpServlet {

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {

		String xml = readXMLFromRequestBody(request);
		Document xmlDoc = null;
		//使用SAX读取XML文本
		try {
			xmlDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder()
					.parse(new ByteArrayInputStream(xml.getBytes()));
		} catch (ParserConfigurationException e) {
			System.out.println("ParserConfigurationException: " + e);
		} catch (SAXException e) {
			System.out.println("SAXException: " + e);
		}
		//创建响应文本
		NodeList tastes = xmlDoc.getElementsByTagName("taste");
		String responseText = "";
		if (tastes.getLength() != 0) {
			String taste = null;
			responseText = "Your Hobbies：<br>";
			for (int i = 0; i < tastes.getLength(); i++) {
				taste = tastes.item(i).getFirstChild().getNodeValue();
				responseText = responseText + taste + "<br>";
			}
		} else
			responseText = "You have not input your hobbies";
		response.setContentType("text/html;charset=gb2312");
		response.getWriter().print(responseText);
	}

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
	}
	//读取传进来的XML格式的参数
	private String readXMLFromRequestBody(HttpServletRequest request) {
		StringBuffer xml = new StringBuffer();
		String line = null;
		try {
			BufferedReader reader = request.getReader();
			while ((line = reader.readLine()) != null) {
				xml.append(line);
			}
		} catch (Exception e) {
			System.out.println("Error reading XML: " + e.toString());
		}
		return xml.toString();
	}
}