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web service初探（xfire篇）

1、概述
??????本例試圖通過web service完成人員檔案查詢功能。
??????涉及到相關(guān)技術(shù)：JAVA?XFIRE?DOM4J?

2、相關(guān)代碼
??????2.1?服務(wù)器端
????????????

package ?com.howelltech.xfire;
2

public ? interface ?IFileService? {
4

???? public ?String?getFile(String?studentName);
5

}
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package ?com.howelltech.xfire;
?2

import ?java.util.HashMap;
?4

import ?java.util.Map;
?5

public ? class ?FileService? implements ?IFileService? {
?7

???? public ?FileService()? {}
?8

???? 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;
?2

import ?java.io.IOException;
?4

import ?java.io.UnsupportedEncodingException;
?5

import ?java.util.HashMap;
?6

import ?java.util.Iterator;
?7

import ?java.util.Map;
?8

import ?java.util.Set;
?9

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();
32

???????? try ? {
33

????????????Document?document? = ?DocumentHelper.parseText(xml);
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????????????Element?root? = ?document.getRootElement();
35

???????????? for ?(?Iterator?i? = ?root.elementIterator();?i.hasNext();?)? {
36

????????????????Element?el? = ?(Element)?i.next();
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????????????????map.put(el.getName(),?el.getText());
38

????????????}
39

????????} ? catch ?(DocumentException?e)? {
40

????????????e.printStackTrace();
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????????}
42

???????? return ?map;
43

????}
44

}
45

??????2.2 客戶端

package ?com.howelltech.xfire;
?2

import ?java.io.IOException;
?4

import ?java.net.MalformedURLException;
?5

import ?java.util.HashMap;
?6

import ?java.util.Iterator;
?7

import ?java.util.Map;
?8

import ?java.util.Set;
?9

import ?javax.servlet.ServletException;
11

import ?javax.servlet.http.HttpServlet;
12

import ?javax.servlet.http.HttpServletRequest;
13

import ?javax.servlet.http.HttpServletResponse;
14

import ?org.codehaus.xfire.XFire;
16

import ?org.codehaus.xfire.XFireFactory;
17

import ?org.codehaus.xfire.client.XFireProxyFactory;
18

import ?org.codehaus.xfire.service.Service;
19

import ?org.codehaus.xfire.service.binding.ObjectServiceFactory;
20

public ? class ?Client4FileService? extends ?HttpServlet? {
22

???? protected ? void ?doGet(HttpServletRequest?req,?HttpServletResponse?resp)
24

???????????? throws ?ServletException,?IOException? {
25

????????String?name? = ?req.getParameter( " name " );
26

????????String?defName? = ? " jack " ;
27

???????? if ?( null ? != ?name)? {
29

????????????defName? = ?name;
30

????????}
31

????????String?responseGot? = ? "" ;
32

????????Map?map? = ? new ?HashMap();
33

???????? try ? {
34

????????????responseGot? = ?callWebService(defName);
35

????????????map? = ? new ?Map2Xml().parseXml(responseGot);
36

????????} ? catch ?(Exception?e)? {
37

????????????e.printStackTrace();
38

????????}
39

????????resp.setContentType( " text/html " );
40

????????java.io.PrintWriter?out? = ?resp.getWriter();
41

????????out.println( " <html> " );
42

????????out.println( " <head><title>學(xué)生檔案信息</title></head><body> " );
43

????????out.println( " <h2>學(xué)生檔案信息</h2> " );
44

????????out.println( " <B>Service?Request</B> " ? + ? " <br> " ? + ? " Transfer?funds?-? "
45

???????????????? + ? " <TABLE> " );
46

????????Set?set? = ?map.keySet();
47

???????? for ?(Iterator?iter? = ?set.iterator();?iter.hasNext();)? {
48

????????????String?key? = ?(String)?iter.next();
49

????????????out.println( " <TR><TD> " ? + ?key? + ? " :?</TD><TD> " ? + ?map.get(key)
50

???????????????????? + ? " </TD></TR> " );
51

????????}
52

????????out.println( " </TABLE> " );
53

????????out.println( " <br> " ? + ? " <B>Response?Received</B> " ? + ? " <br> " ? + ?responseGot);
54

????????out.println( " </body></html> " );
55

????}
56

???? /*
58

?????*?call?the?web?service
59

?????*?
60

????? */
61

???? public ?String?callWebService(String?name)? throws ?Exception? {
62

???????? // ?create?a?metadata?of?the?service
64

????????Service?serviceModel? = ? new ?ObjectServiceFactory()
65

????????????????.create(IFileService. class );
66

???????? // ?create?a?proxy?for?the?deployed?service
68

????????XFire?xfire? = ?XFireFactory.newInstance().getXFire();
69

????????XFireProxyFactory?factory? = ? new ?XFireProxyFactory(xfire);
70

???????? // ?String?serviceUrl?=?"xfire.local: // file"?;
71

????????String?serviceUrl? = ? " http://localhost:8080/xfire/services/file " ;
72

????????IFileService?client? = ? null ;
73

???????? try ? {
74

????????????client? = ?(IFileService)?factory.create(serviceModel,?serviceUrl);
75

????????} ? catch ?(MalformedURLException?e)? {
76

????????????e.printStackTrace();
77

????????}
78

???????? // ?invoke?the?service
80

????????String?serviceResponse? = ? "" ;
81

???????? try ? {
82

????????????serviceResponse? = ?client.getFile(name);
83

????????} ? catch ?(Exception?e)? {
84

????????????e.printStackTrace();
85

????????}
86

???????? return ?serviceResponse;
88

????}
89

???? /*
91

?????*?doPost():
92

????? */
93

???? protected ? void ?doPost(HttpServletRequest?req,?HttpServletResponse?resp)
94

???????????? throws ?ServletException,?IOException? {
95

????????doGet(req,?resp);
96

????}
97

}
98

??????2.3 配置文件

<? xml?version="1.0"?encoding="ISO-8859-1" ?>
?2

<! DOCTYPE?web-app?PUBLIC?"-//Sun?Microsystems,?Inc.//DTD?Web?Application?2.3//EN"?"http://java.sun.com/dtd/web-app_2_3.dtd" >
?4

< web-app >
?6

???? < servlet >
?7

???????? < servlet-name > XFireServlet </ servlet-name >
?8

???????? < display-name > XFire?Servlet </ display-name > ????????
?9

???????? < servlet-class > org.codehaus.xfire.transport.http.XFireConfigurableServlet </ servlet-class >
10

???? </ servlet >
11

???? < servlet >
12

???????? < servlet-name > WsClient </ servlet-name >
13

???????? < display-name > WsClientServlet </ display-name >
14

???????? < description ></ description >
15

???????? < servlet-class > com.howelltech.xfire.Client4FileService </ servlet-class >
16

???? </ servlet >
17

????
18

???? < servlet-mapping >
19

???????? < servlet-name > XFireServlet </ servlet-name > ????????
20

???????? < url-pattern > /servlet/XFireServlet/* </ url-pattern > ????
21

???? </ servlet-mapping > ????????
22

???? < servlet-mapping > ????????
23

???????? < servlet-name > XFireServlet </ servlet-name > ????????
24

???????? < url-pattern > /services/* </ url-pattern > ????
25

???? </ servlet-mapping >
26

???? < servlet-mapping >
27

???????? < servlet-name > WsClient </ servlet-name >
28

???????? < url-pattern > /ws </ url-pattern >
29

???? </ servlet-mapping >
30

</ web-app >

services.xml

< beans? xmlns ="http://xfire.codehaus.org/config/1.0" > ????
2

???? < service > ????
3

???????? < name > file </ name > ????
4

???????? < namespace > studentFile </ namespace > ????
5

???????? < serviceClass > com.howelltech.xfire.IFileService </ serviceClass > ????
6

???????? < implementationClass > com.howelltech.xfire.FileService </ implementationClass > ??
7

???? </ service > ????
8

</ beans >
9

3、部署相關(guān)
??????3.1 類庫(kù)
????????????java類庫(kù)，xfire類庫(kù)，dom4j類庫(kù)
??????3.2 目錄結(jié)構(gòu)
????????????WEB-INF
????????????--- web.xml
????????????--- lib
????????????--- classes
???????????? ???--- com.howelltech.xfire.*.class
??????????????? --- META-INF
????????????????????? --- xfire
???????????????????????????services.xml
??????3.3 測(cè)試url
??????????? http://localhost:8080/xfire/ws

4、總結(jié)
??????感覺xfire實(shí)現(xiàn)web service還是挺容易的，不過實(shí)際項(xiàng)目中會(huì)遇到哪些問題，還有待以后的驗(yàn)證。下次繼續(xù)思考客戶端與服務(wù)器端交互問題，比如修改服務(wù)器端信息，傳輸文件、圖片等數(shù)據(jù)。

posted on 2007-03-30 11:36 rethink 閱讀(2405) 評(píng)論(0) 編輯收藏所屬分類: web service

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相關(guān)文章: xfire在spring中的應(yīng)用 web service初探（xfire篇）

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