web service初探（xfire篇）

1、概述
本例试图通过web service完成人员档案查询功能。
涉及到相关技术：JAVA XFIRE DOM4J

2、相关代码
2.1 服务器端

package com.howelltech.xfire;
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public interface IFileService {
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public String getFile(String studentName);
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}
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package com.howelltech.xfire;
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import java.util.HashMap;
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import java.util.Map;
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public class FileService implements IFileService {
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public FileService() {}
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public String getFile(String studentName) {
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Map map = new HashMap();
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map.put( " name " , " jack " );
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map.put( " sex " , " male " );
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map.put( " age " , " 18 " );
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if (studentName.equalsIgnoreCase( " jack " )) {
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return ( new Map2Xml().createDocument(map)).asXML();
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} else {
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return "" ;
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}
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}
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}
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package com.howelltech.xfire;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import org.dom4j.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.DocumentHelper;
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import org.dom4j.Element;
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import org.dom4j.io.OutputFormat;
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import org.dom4j.io.XMLWriter;
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public class Map2Xml {
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public Document createDocument(Map map) {
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Document document = DocumentHelper.createDocument();
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Element root = document.addElement( " root " );
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Set set = map.keySet();
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for (Iterator iter = set.iterator(); iter.hasNext();) {
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String key = iter.next().toString();
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Element el = root.addElement(key).addText(map.get(key).toString());
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}
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return document;
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}
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public Map parseXml(String xml) {
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Map map = new HashMap();
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try {
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Document document = DocumentHelper.parseText(xml);
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Element root = document.getRootElement();
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for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
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Element el = (Element) i.next();
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map.put(el.getName(), el.getText());
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}
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} catch (DocumentException e) {
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e.printStackTrace();
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}
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return map;
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}
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}
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2.2 客户端

package com.howelltech.xfire;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.codehaus.xfire.XFire;
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import org.codehaus.xfire.XFireFactory;
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import org.codehaus.xfire.client.XFireProxyFactory;
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import org.codehaus.xfire.service.Service;
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import org.codehaus.xfire.service.binding.ObjectServiceFactory;
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public class Client4FileService extends HttpServlet {
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protected void doGet(HttpServletRequest req, HttpServletResponse resp)
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throws ServletException, IOException {
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String name = req.getParameter( " name " );
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String defName = " jack " ;
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if ( null != name) {
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defName = name;
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}
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String responseGot = "" ;
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Map map = new HashMap();
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try {
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responseGot = callWebService(defName);
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map = new Map2Xml().parseXml(responseGot);
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} catch (Exception e) {
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e.printStackTrace();
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}
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resp.setContentType( " text/html " );
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java.io.PrintWriter out = resp.getWriter();
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out.println( " <html> " );
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out.println( " <head><title>学生档案信息</title></head><body> " );
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out.println( " <h2>学生档案信息</h2> " );
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out.println( " <B>Service Request</B> " + " <br> " + " Transfer funds - "
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+ " <TABLE> " );
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Set set = map.keySet();
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for (Iterator iter = set.iterator(); iter.hasNext();) {
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String key = (String) iter.next();
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out.println( " <TR><TD> " + key + " : </TD><TD> " + map.get(key)
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+ " </TD></TR> " );
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}
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out.println( " </TABLE> " );
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out.println( " <br> " + " <B>Response Received</B> " + " <br> " + responseGot);
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out.println( " </body></html> " );
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}
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/*
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* call the web service
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*
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*/
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public String callWebService(String name) throws Exception {
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// create a metadata of the service
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Service serviceModel = new ObjectServiceFactory()
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.create(IFileService. class );
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// create a proxy for the deployed service
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XFire xfire = XFireFactory.newInstance().getXFire();
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XFireProxyFactory factory = new XFireProxyFactory(xfire);
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// String serviceUrl = "xfire.local: // file" ;
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String serviceUrl = " http://localhost:8080/xfire/services/file " ;
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IFileService client = null ;
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try {
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client = (IFileService) factory.create(serviceModel, serviceUrl);
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} catch (MalformedURLException e) {
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e.printStackTrace();
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}
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// invoke the service
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String serviceResponse = "" ;
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try {
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serviceResponse = client.getFile(name);
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} catch (Exception e) {
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e.printStackTrace();
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}
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return serviceResponse;
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}
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/*
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* doPost():
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*/
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protected void doPost(HttpServletRequest req, HttpServletResponse resp)
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throws ServletException, IOException {
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doGet(req, resp);
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}
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}
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2.3 配置文件

<? xml version="1.0" encoding="ISO-8859-1" ?>
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<! DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
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< web-app >
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< servlet >
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< servlet-name > XFireServlet </ servlet-name >
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< display-name > XFire Servlet </ display-name >
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< servlet-class > org.codehaus.xfire.transport.http.XFireConfigurableServlet </ servlet-class >
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</ servlet >
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< servlet >
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< servlet-name > WsClient </ servlet-name >
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< display-name > WsClientServlet </ display-name >
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< description ></ description >
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< servlet-class > com.howelltech.xfire.Client4FileService </ servlet-class >
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</ servlet >
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< servlet-mapping >
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< servlet-name > XFireServlet </ servlet-name >
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< url-pattern > /servlet/XFireServlet/* </ url-pattern >
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</ servlet-mapping >
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< servlet-mapping >
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< servlet-name > XFireServlet </ servlet-name >
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< url-pattern > /services/* </ url-pattern >
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</ servlet-mapping >
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< servlet-mapping >
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< servlet-name > WsClient </ servlet-name >
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< url-pattern > /ws </ url-pattern >
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</ servlet-mapping >
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</ web-app >

services.xml

< beans xmlns ="http://xfire.codehaus.org/config/1.0" >
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< service >
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< name > file </ name >
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< namespace > studentFile </ namespace >
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< serviceClass > com.howelltech.xfire.IFileService </ serviceClass >
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< implementationClass > com.howelltech.xfire.FileService </ implementationClass >
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</ service >
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</ beans >
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3、部署相关
      3.1 类库
            java类库，xfire类库，dom4j类库
      3.2 目录结构
            WEB-INF
            --- web.xml
            --- lib
            --- classes
                --- com.howelltech.xfire.*.class
                --- META-INF
                      --- xfire
                           services.xml
      3.3 测试url
            http://localhost:8080/xfire/ws

4、总结
      感觉xfire实现web service还是挺容易的，不过实际项目中会遇到哪些问题，还有待以后的验证。下次继续思考客户端与服务器端交互问题，比如修改服务器端信息，传输文件、图片等数据。

posted on 2007-03-30 11:36 rethink 阅读(2397) 评论(0) 编辑收藏所属分类: web service

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相关文章: xfire在spring中的应用 web service初探（xfire篇）

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