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使用Axis2傳輸附件(AXIS2 MTOM)--2

5．測試

FileTransferClient.java

package sample;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import org.apache.axiom.attachments.utils.IOUtils;

import org.apache.axiom.om.OMAbstractFactory;

import org.apache.axiom.om.OMElement;

import org.apache.axiom.om.OMFactory;

import org.apache.axiom.om.OMNamespace;

import org.apache.axiom.om.OMText;

import org.apache.axiom.soap.SOAP11Constants;

import org.apache.axis2.AxisFault;

import org.apache.axis2.Constants;

import org.apache.axis2.addressing.EndpointReference;

import org.apache.axis2.client.Options;

import org.apache.axis2.client.ServiceClient;

public class FileTransferClient {

private static EndpointReference targetEPR =

new EndpointReference("http://127.0.0.1:8080/axis2/services/FileOperation");

public static boolean upload(String fileName, File file, String fileType) {

try {

OMElement data = buildUploadEnvelope(fileName, file, fileType);

Options options = buildOptions();

ServiceClient sender = new ServiceClient();

sender.setOptions(options);

System.out.println("The data in method upload: "+data);

OMElement ome = sender.sendReceive(data);

System.out.println("Convert the data to element in method upload: "+ome);

String b = ome.getText();

return Boolean.parseBoolean(b);

}

catch(Exception e) {

e.printStackTrace();

}

return false;

}

public static boolean download(String userName, String fileName, String fileType) {

try {

OMElement data = buildDownloadEnvelope(userName, fileName, fileType);

Options options = buildOptions();

ServiceClient sender = new ServiceClient();

sender.setOptions(options);

System.out.println("The data in method download: "+data);

OMElement ome = sender.sendReceive(data);

System.out.println("Convert the data to element in method download: "+ome);

OMText binaryNode = (OMText) ome.getFirstOMChild();

binaryNode.setOptimize(true); //必須加此句，否則會出現(xiàn)ContentID is null的異常!

DataHandler actualDH = (DataHandler) binaryNode.getDataHandler();

FileOutputStream imageOutStream = new FileOutputStream("D:/userTemp/xx.gif");

InputStream is = actualDH.getInputStream();

imageOutStream.write(IOUtils.getStreamAsByteArray(is));

return true;

}

catch(Exception e) {

e.printStackTrace();

}

return false;

}

private static OMElement buildUploadEnvelope(String fileName, File file, String fileType) {

DataHandler expectedDH;

OMFactory fac = OMAbstractFactory.getOMFactory();

OMNamespace omNs = fac.createOMNamespace("http://example.org/filedata", "fd");

OMElement data = fac.createOMElement("upload", omNs);

OMElement fileContent = fac.createOMElement("fileContent", omNs);

FileDataSource dataSource = new FileDataSource(file);

expectedDH = new DataHandler(dataSource);

OMText textData = fac.createOMText(expectedDH, true);

fileContent.addChild(textData);

OMElement _fileName = fac.createOMElement("fileName", omNs);

_fileName.setText(fileName);

OMElement _fileType = fac.createOMElement("fileType", omNs);

_fileType.setText(fileType);

data.addChild(_fileName);

data.addChild(_fileType);

data.addChild(fileContent);

return data;

}

private static OMElement buildDownloadEnvelope(String userName, String fileName, String fileType) {

OMFactory fac = OMAbstractFactory.getOMFactory();

OMNamespace omNs = fac.createOMNamespace("http://example.org/filedata", "fd");

OMElement data = fac.createOMElement("download", omNs);

OMElement _userName = fac.createOMElement("userName", omNs);

_userName.setText(userName);

OMElement _fileName = fac.createOMElement("fileName", omNs);

_fileName.setText(fileName);

OMElement _fileType=fac.createOMElement("fileType", omNs);

_fileType.setText(fileType);

data.addChild(_userName);

data.addChild(_fileName);

data.addChild(_fileType);

return data;

}

private static Options buildOptions() throws AxisFault {

Options options = new Options();

options.setSoapVersionURI(SOAP11Constants.SOAP_ENVELOPE_NAMESPACE_URI);

options.setTo(targetEPR);

// enabling MTOM in the client side

options.setProperty(Constants.Configuration.ENABLE_MTOM, Constants.VALUE_TRUE);

options.setTransportInProtocol(Constants.TRANSPORT_HTTP);

return options;

}

public static void main(String agrs[]) {

String file = "D:/userTemp/ya.gif";

String fn = "testUser";

String ft="gif";

boolean rtv = upload(fn,new File(file),ft);

System.out.println("is upload success: "+rtv);

String un="zj";

String downfn="1";

if(download(un,downfn,ft)){

System.out.println("download success.");

}

else System.out.println("download fail.");

System.out.println("Client main end.");

}

6.結(jié)果

察看soap消息，我們可以發(fā)現(xiàn)

<fd:upload xmlns:fd="http://example.org/filedata">

<fd:fileName>testUser</fd:fileName>

<fd:fileType>gif</fd:fileType>

<fd:fileContent>RHQMLJJ4/AMZkEBAEAOw（省略部分2進制代碼）</fd:fileContent>

</fd:upload>

Convert the data to element in method upload:

<fd:response xmlns:fd=http://example.org/filedata xmlns:tns="http://ws.apache.org/axis2">true</fd:response>

The data in method download:

<fd:download xmlns:fd="http://example.org/filedata">

<fd:userName>zj</fd:userName>

<fd:fileName>1</fd:fileName>

<fd:fileType>gif</fd:fileType>

</fd:download>

Convert the data to element in method download:

<fd:response xmlns:fd="http://example.org/filedata" xmlns:tns="http://ws.apache.org/axis2">

eIqGRwjkQAAAOw==（省略部分2進制代碼）

</fd:response>

7．代碼分析

利用Axis2的Mtom發(fā)送附件應(yīng)用了builder模式。要向一個webserive 發(fā)送請求，首先就要構(gòu)建一個請求的Envelope,Axis2構(gòu)建Envelope的時候是利用的Axis2的AXIOM api(就是axis2的java object和xml的映射處理機制),其編程模式和DOM差不多的.看這一段:

private static OMElement buildUploadEnvelope(String mailboxnum, short greetingType, File file, String FileType) {

DataHandler expectedDH;

OMFactory fac = OMAbstractFactory.getOMFactory();

...

return data;

}

這一段其實是構(gòu)建的data對像是這樣一段xml的java object代表：

<fd:upload xmlns:fd="http://example.org/filedata">

<fd:fileName>testUser</fd:fileName>

<fd:fileType>gif</fd:fileType>

<fd:fileContent>RHQMLJJ4/AMZkEBAEAOw（省略部分2進制代碼）</fd:fileContent>

</fd:upload>

其中的Dwvc2VydmljZT4NCjwvZGVwbG95bWVudD4NCg0K是要傳送的文件的內(nèi)容代表，至于什么編碼，我沒有深究。注意這一句:

OMElement data = fac.createOMElement("upload", omNs);

這里的“upload”參數(shù)對應(yīng)的是webservice的一個操作的名稱，這個操作的名稱是跟webservice的server端實現(xiàn)類的方法名和services.xml的所定義的

<operationname="upload">

<actionMapping>urn:upload</actionMapping>

<messageReceiverclass="org.apache.axis2.receivers.RawXMLINOutMessageReceiver"/>

</operation>

要一致的。

再看看這一段，

private static Options buildOptions() {

Options options = new Options();

...

return options;

}

這里構(gòu)建的Options對象，顧名思義就是調(diào)用webservice的相應(yīng)的選項：比如這里就指定了Soap協(xié)議為1.1 版,指定了所請求的service 的EPR(就是地址)，聲明在client應(yīng)用MTOM指定傳輸協(xié)議為HTTP。

構(gòu)建好要傳送的data和options后,所執(zhí)行的代碼為：

ServiceClient sender = new ServiceClient();

//設(shè)定選項

sender.setOptions(options);

//打印要傳送的數(shù)據(jù)，為一段xml

System.out.println(data);

//傳送數(shù)據(jù)，得到返回值

OMElement ome = sender.sendReceive(data);

//打印返回值，為一段xml

System.out.println(ome);

//析取返回值中的數(shù)據(jù)

String b = ome.getText();

//返回

return Boolean.parseBoolean(b);

可以發(fā)現(xiàn)，server端和client的中間傳遞數(shù)據(jù)都是通過 org.apache.axiom.om.OMElement對象的，這個對象是一段xml的java 對象映射。

posted on 2008-07-10 16:54 禮物閱讀(836) 評論(0) 編輯收藏所屬分類: web service

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相關(guān)文章: (原)Axis2 OM 模式使用 Web Service Appender for Log4j 管理日志紀(jì)錄 (原創(chuàng))用Axis2寫的通用WebService組件 Webservice 的設(shè)計和模式 WebService大講堂之Axis2（2）：復(fù)合類型數(shù)據(jù)的傳遞（轉(zhuǎn)載）WebService大講堂之Axis2（1）：用POJO實現(xiàn)0配置的WebService (轉(zhuǎn)載)使用Axis2的底層API開發(fā)Web Service 使用Axis2傳遞簡單Java對象（POJO） Axis2快速上手指南使用Axis2傳輸附件(AXIS2 MTOM)--2

Terry.Li-彬

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