1、概述
??????本例試圖通過web service完成人員檔案查詢功能。
??????涉及到相關技術：JAVA?XFIRE?DOM4J?
2、相關代碼
??????2.1?服務器端
????????????
1
package
?com.howelltech.xfire;
2
3
public
?
interface
?IFileService?
{
4
????
public
?String?getFile(String?studentName);
5
}
6
?1
package
?com.howelltech.xfire;
?2
?3
import
?java.util.HashMap;
?4
import
?java.util.Map;
?5
?6
public
?
class
?FileService?
implements
?IFileService?
{
?7
????
public
?FileService()?
{}
?8
?9
????
public
?String?getFile(String?studentName)?
{
10
????????Map?map?
=
?
new
?HashMap();
11
????????map.put(
"
name
"
,?
"
jack
"
);
12
????????map.put(
"
sex
"
,?
"
male
"
);
13
????????map.put(
"
age
"
,?
"
18
"
);
14
????????
if
(studentName.equalsIgnoreCase(
"
jack
"
))?
{
15
????????????
return
?(
new
?Map2Xml().createDocument(map)).asXML();
16
????????}
?
else
?
{
17
????????????
return
?
""
;
18
????????}
19
????}
20
}
21
?1
package
?com.howelltech.xfire;
?2
?3
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
10
import
?org.dom4j.Document;
11
import
?org.dom4j.DocumentException;
12
import
?org.dom4j.DocumentHelper;
13
import
?org.dom4j.Element;
14
import
?org.dom4j.io.OutputFormat;
15
import
?org.dom4j.io.XMLWriter;
16
17
public
?
class
?Map2Xml?
{
18
????
public
?Document?createDocument(Map?map)?
{
19
????????Document?document?
=
?DocumentHelper.createDocument();
20
????????Element?root?
=
?document.addElement(
"
root
"
);
21
22
????????Set?set?
=
?map.keySet();
23
????????
for
?(Iterator?iter?
=
?set.iterator();?iter.hasNext();)?
{
24
????????????String?key?
=
?iter.next().toString();
25
????????????Element?el?
=
?root.addElement(key).addText(map.get(key).toString());
26
????????}
27
????????
return
?document;
28
????}
29
30
????
public
?Map?parseXml(String?xml)?
{
31
????????Map?map?
=
?
new
?HashMap();
32
????????
try
?
{
33
????????????Document?document?
=
?DocumentHelper.parseText(xml);
34
????????????Element?root?
=
?document.getRootElement();
35
????????????
for
?(?Iterator?i?
=
?root.elementIterator();?i.hasNext();?)?
{
36
????????????????Element?el?
=
?(Element)?i.next();
37
????????????????map.put(el.getName(),?el.getText());
38
????????????}
39
????????}
?
catch
?(DocumentException?e)?
{
40
????????????e.printStackTrace();
41
????????}
42
????????
return
?map;
43
????}
44
}
45
??????2.2 客戶端
?
?1
package
?com.howelltech.xfire;
?2
?3
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
10
import
?javax.servlet.ServletException;
11
import
?javax.servlet.http.HttpServlet;
12
import
?javax.servlet.http.HttpServletRequest;
13
import
?javax.servlet.http.HttpServletResponse;
14
15
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
21
public
?
class
?Client4FileService?
extends
?HttpServlet?
{
22
23
????
protected
?
void
?doGet(HttpServletRequest?req,?HttpServletResponse?resp)
24
????????????
throws
?ServletException,?IOException?
{
25
????????String?name?
=
?req.getParameter(
"
name
"
);
26
????????String?defName?
=
?
"
jack
"
;
27
28
????????
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>學生檔案信息</title></head><body>
"
);
43
????????out.println(
"
<h2>學生檔案信息</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
57
????
/**/
/*
58
?????*?call?the?web?service
59
?????*?
60
?????
*/
61
????
public
?String?callWebService(String?name)?
throws
?Exception?
{
62
63
????????
//
?create?a?metadata?of?the?service
64
????????Service?serviceModel?
=
?
new
?ObjectServiceFactory()
65
????????????????.create(IFileService.
class
);
66
67
????????
//
?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
79
????????
//
?invoke?the?service
80
????????String?serviceResponse?
=
?
""
;
81
????????
try
?
{
82
????????????serviceResponse?
=
?client.getFile(name);
83
????????}
?
catch
?(Exception?e)?
{
84
????????????e.printStackTrace();
85
????????}
86
87
????????
return
?serviceResponse;
88
????}
89
90
????
/**/
/*
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
?1
<?
xml?version="1.0"?encoding="ISO-8859-1"
?>
?2
?3
<!
DOCTYPE?web-app?PUBLIC?"-//Sun?Microsystems,?Inc.//DTD?Web?Application?2.3//EN"?"http://java.sun.com/dtd/web-app_2_3.dtd"
>
?4
?5
<
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
31
</
web-app
>
services.xml
1
<
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
??????3.1 類庫
????????????java類庫，xfire類庫，dom4j類庫
??????3.2 目錄結構
????????????WEB-INF
????????????--- web.xml
????????????--- lib
????????????--- classes
???????????? ???--- com.howelltech.xfire.*.class
??????????????? --- META-INF
????????????????????? --- xfire
???????????????????????????services.xml
??????3.3 測試url
??????????? http://localhost:8080/xfire/ws
4、總結
??????感覺xfire實現web service還是挺容易的，不過實際項目中會遇到哪些問題，還有待以后的驗證。下次繼續思考客戶端與服務器端交互問題，比如修改服務器端信息，傳輸文件、圖片等數據。