介紹:
面向服務架構(SOA，Services-oriented architecture)和Web Services已經變成了當前行業的熱點話題。XFire正是在這種情況下產生的。它能夠使POJO發布為最少的Web Services，而只需要付出最小化的努力。從而，它使希望使用這項技術的初級開發者的學習曲線變得平緩。同時，由于它兼容最新標準和提供了豐富的API，XFire為高級用戶提供了更多的大好機會。
步驟清單:
1、 檢查Java類的方法和默認構造函數確保為public
2、 增加XFire servlet相關條目到web.xml中
3、 創建services.xml，把它放到WEB-INF/classes/META-INF/xfire目錄下
4、 增加XFire和第三方包到你的Web應用的WEB-INF/lib文件夾中
實際例子:
0. 定義 web.xml
<servlet>
<servlet-name>XFireServlet</servlet-name>
<display-name>XFire Servlet</display-name>
<servlet-class>org.codehaus.xfire.transport.http.XfireConfigurableServlet
</servlet-class>
</servlet><servlet-mapping>
<servlet-name>XFireServlet</servlet-name>
<url-pattern>/servlet/XFireServlet/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>XFireServlet</servlet-name>
<url-pattern>/services/*</url-pattern>
</servlet-mapping>
1. 定義接口
public interface IBankingService {
public String transferFunds(
String fromAccount, String toAccount, double amount, String currency);
}
2.定義實現
import java.text.NumberFormat;
import java.text.DecimalFormat;
/** XFire WebServices sample implementation class.
*/
public class BankingService implements IBankingService {
//Default constructor.
public BankingService(){
}
/** Transfers fund from one account to another.
*/
public String transferFunds(
String fromAccount, String toAccount, double amount, String currency){
String statusMessage = "";
//Call business objects and other components to get the job done.
//Then create a status message and return.
try {
NumberFormat formatter = new DecimalFormat("###,###,###,###.00");
statusMessage = "COMPLETED: " + currency + " " + formatter.format(amount)+
" was successfully transferred from A/C# " + fromAccount + " to A/C# " + toAccount;
} catch (Exception e){
statusMessage = "BankingService.transferFunds(): EXCEPTION: " + e.toString();
}
return statusMessage;
}
}
3. 定義 web 描述
<beans xmlns="http://xfire.codehaus.org/config/1.0">
<service>
<name>Banking</name>
<namespace>mybank</namespace>
<serviceClass>com.mybank.xfire.example.IBankingService</serviceClass>
<implementationClass>com.mybank.xfire.example.BankingService</implementationClass>
</service>
</beans>
4.部署獲得WSDL
WSDL的URL應該是:http://localhost:8080/websvc/services/Banking?wsdl。
5. 開發客戶端
//Create a metadata of the service
Service serviceModel = new ObjectServiceFactory().create(IBankingService.class);
log.debug("callSoapServiceLocal(): got service model." );
//Create a proxy for the deployed service
XFire xfire = XFireFactory.newInstance().getXFire();
XFireProxyFactory factory = new XFireProxyFactory(xfire);
String serviceUrl = "http://localhost:8080/websvc/services/Banking";
IBankingService client = null;
try {
client = (IBankingService) factory.create(serviceModel, serviceUrl);
} catch (MalformedURLException e) {
log.error("WsClient.callWebService(): EXCEPTION: " + e.toString());
}
//Invoke the service
String serviceResponse = "";
try {
serviceResponse = client.transferFunds(fromAccount, toAccount, amount, currency);
} catch (Exception e){
log.error("WsClient.callWebService(): EXCEPTION: " + e.toString());
serviceResponse = e.toString();
}
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