web service 開發(fā)實戰(zhàn)（dii,proxy,stub）

Elena 2006-05-17

展開全文

一、axis安裝
1.環(huán)境
J2SE SDK 1.3 or 1.4: 我使用 1.4.2
Servlet Container: 我使用Tomcat 5.0
2.到 http://ws./axis/網(wǎng)站下載axis安裝包
3.解壓縮安裝包，將AXIS_UNZIP_PATH\axis-version\webapps下的axis包拷貝到TOMCAT_HOME\webapps\下，
以下約定AXIS_HOME為該TOMCAT_HOME\webapps\axis目錄
4.啟動tomcat,訪問http://localhost:8080/axis 檢查安裝是否成功
5.以上步驟執(zhí)行成功，可以開發(fā)webservice例子了

axis支持三種web service的部署和開發(fā)，分別為：
1。Dynamic Invocation Interface ( DII)
2。 Stubs方式
3。Dynamic Proxy方式

以下逐一講述web service在axis上的部署和開發(fā)，設置classpath
set CLASSPATH=.;%AXIS_HOME%\lib\axis.jar;%AXIS_HOME%\lib\axis-ant.jar;%AXIS_HOME%\lib\commons-discovery-0.2.jar;%AXIS_HOME%\lib\commons-logging-1.0.4.jar;%AXIS_HOME%\lib\jaxrpc.jar;%AXIS_HOME%\lib\saaj.jar;%AXIS_HOME%\lib\wsdl4j-1.5.1.jar;%AXIS_HOME%\lib\log4j-1.2.8.jar;E:/thirdparty/activation/activation.jar;E:/thirdparty/activation/mail.jar

二、編寫DII(Dynamic Invocation Interface )方式web服務
1.編寫服務端程序HelloClient
public class HelloClient {
public String getName(String name)
{
return "hello "+name;
}
}

2.將源碼拷貝到AXIS_HOME下，重命名為 HelloClient.jws
3.訪問連接http://localhost:8080/axis/HelloClient.jws?wsdl，頁面顯示axis自動生成的wsdl
4.編寫訪問服務的客戶端 TestHelloClient.java

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import javax.xml.namespace.QName;
import javax.xml.rpc.ServiceException;
import java.net.MalformedURLException;
import java.rmi.RemoteException;

public class SayHelloClient2 {
public static void main(String[] args) {
try {
String endpoint = "http://localhost:8080/axis/HelloClient.jws";

Service service = new Service();
Call call = null;

call = (Call) service.createCall();

call.setOperationName(new QName(
"http://localhost:8080/axis/HelloClient.jws", "getName"));
call.setTargetEndpointAddress(new java.net.URL(endpoint));

String ret = (String) call.invoke(new Object[] {"zhangsan"});
System.out.println("return value is " + ret);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
三、編寫Dynamic Proxy方式訪問服務
1.編寫部署服務端程序，同上邊DII方式，本次仍使用上邊部署的HelloClient
2.編寫代理接口
public interface HelloClientInterface extends java.rmi.Remote {
public String getName(String name) throws java.rmi.RemoteException;
}
3.編寫并執(zhí)行客戶端程序TestHelloClient.java

import javax.xml.rpc.Service;
import javax.xml.rpc.ServiceFactory;
import java.net.URL;
import javax.xml.namespace.QName;

public class TestHelloClient {
public static void main(String[] args) {
try
{
String wsdlUrl = "http://localhost:8080/axis/HelloClient.jws?wsdl";
String nameSpaceUri = "http://localhost:8080/axis/HelloClient.jws";
String serviceName = "HelloClientService";
String portName = "HelloClient";

ServiceFactory serviceFactory = ServiceFactory.newInstance();
Service afService = serviceFactory.createService(new URL(wsdlUrl),
new QName(nameSpaceUri, serviceName));
HelloClientInterface proxy = (HelloClientInterface)
afService.getPort(new QName(
nameSpaceUri, portName), HelloClientInterface.class);
System.out.println("return value is "+proxy.getName("john") ) ;
}catch(Exception ex)
{
ex.printStackTrace() ;
}
}
}

四、編寫wsdd發(fā)布web服務，編寫stub client訪問web服務

1.編寫服務端程序server,SayHello.java，編譯server.SayHello.java
package server;
public class SayHello {
public String getName(String name)
{
return "hello "+name;
}
}
2.編寫LogHandler.java
import org.apache.axis.AxisFault;
import org.apache.axis.Handler;
import org.apache.axis.MessageContext;
import org.apache.axis.handlers.BasicHandler;

import java.util.Date;

public class LogHandler extends BasicHandler {
public void invoke(MessageContext msgContext) throws AxisFault
{
/** Log an access each time we get invoked.
*/
try {
Handler serviceHandler = msgContext.getService();

Integer numAccesses =
(Integer)serviceHandler.getOption("accesses");
if (numAccesses == null)
numAccesses = new Integer(0);

numAccesses = new Integer(numAccesses.intValue() + 1);

Date date = new Date();
String result = date + ": service " +
msgContext.getTargetService() +
" accessed " + numAccesses + " time Moon

.";
serviceHandler.setOption("accesses", numAccesses);

System.out.println(result);
} catch (Exception e) {
throw AxisFault.makeFault Envelope

;
}
}
}
3..編寫wsdd文件
deploy.wsdd
<deployment xmlns="http://xml./axis/wsdd/"
xmlns:java="http://xml./axis/wsdd/providers/java">

<handler name="print" type="java:LogHandler"/>
<service name="sayhello" provider="java:RPC">
<requestFlow>
<handler type="print"/>
</requestFlow>
<parameter name="className" value="server.SayHello"/>
<parameter name="allowedMethods" value="*"/>
</service>
</deployment>

3.將編譯后的文件拷貝到AXIS_HOME/WEB-INF/classes下，如：D:\tomcat\webapps\axis\WEB-INF\classes
4.發(fā)布服務：
java org.apache.axis.client.AdminClient deploy.wsdd
5.生成client stub文件
a:方式1
將SayHello.java拷貝到AXIS_HOME/下，重命名為SayHello.jws，執(zhí)行下面的命令生存client stub
java org.apache.axis.wsdl.WSDL2Java -p client http://localhost:8080/axis/services/SayHello.jws?wsdl
b:方式2
  執(zhí)行如下命令生成SayHello.wsdl
java org.apache.axis.wsdl.Java2WSDL -oSayHello.wsdl -lhttp://localhost:8080/axis/services/SayHello -nsayhello server.SayHello
執(zhí)行如下命令生成client stub
   java org.apache.axis.wsdl.WSDL2Java SayHello.wsdl -p client
生成的stub client文件列表為：
1。SayHello.java
2。SayHelloService.java。
3。SayHelloServiceLocator.java
4。SayHelloSoapBindingStub.java
6.編寫客戶端程序，編譯并執(zhí)行
public class SayHelloClient {
public static void main(String[] args) {
try {

SayHelloService service = new client.
SayHelloServiceLocator();
client.SayHello_PortType client = service.getSayHello();
String retValue=client.getName("zhangsan");
System.out.println(retValue);

} catch (Exception e) {
System.err.println("Execution failed. Exception: " + e);
}
}
}