soap学习笔记(六)----使用Axis2传输附件(AXIS2 MTOM) (上)

本文介绍如何使用Axis2传递附件。

 
1.工作环境
IDE: Eclipse 3.1.2
jdk: jdk1.5.0_04
Tomcat: apache-tomcat-5.0.28
AXIS2:1.0(war版本和bin版本)
2.实现
   在Eclipse新建一个动态web工程,在WEB-INF\lib下加入axis2所需的jar包。
本例的是一个系统的用户上传下载图片格式文件的例子,每次上传出携带附件外,还包括文件名, 文件类型。此webservice实现的2个功能就是upload, download.
   AXIS2的webservice发布的时候是打包成xxx.aar发布的,xxx.aar展开后的目录结构为
 --
    --META-INF
       services.xml
    --包含server端实现的class( 目录跟package是一样的结构)
3.服务器端FileTransferServer.java
package sample;
 
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.axis2.AxisFault;
 
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
 
import java.util.Iterator;
 
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
 
public class FileTransferServer {
       public static final String TMP_PATH = "D:/temp";
 
       public OMElement upload(OMElement element) throws Exception {
              OMElement _fileContent = null;//文件内容
              OMElement _fileName = null;//文件名
              OMElement _fileType = null;//文件类型
              System.out.println("The element for upload: " + element);
              for (Iterator _iterator = element.getChildElements(); _iterator
                            .hasNext();) {
                     OMElement _ele = (OMElement) _iterator.next();
                     if (_ele.getLocalName().equalsIgnoreCase("fileContent")) {
                            _fileContent = _ele;
                     }
                     if (_ele.getLocalName().equalsIgnoreCase("fileName")) {
                            _fileName = _ele;
                     }
                     if (_ele.getLocalName().equalsIgnoreCase("fileType")) {
                            _fileType = _ele;
                     }
              }
 
              if (_fileContent == null || _fileType == null) {
                     throw new AxisFault("Either Image or FileName is null");
              }
 
              OMText binaryNode = (OMText) _fileContent.getFirstOMChild();
              String fileName = _fileName.getText();
              String fileType = _fileType.getText();
              String storeDir = TMP_PATH + "/" + "tempTest";
              File dir = new File(storeDir);
              if (!dir.exists()) {
                     dir.mkdir();
              }
              String filePath = storeDir + "/" + fileName + "." + fileType;
              File uploadFile = new File(filePath);
              if (uploadFile.exists()) {
                     filePath = storeDir + "/" + fileName + "(1)" + "." + fileType;
                     uploadFile = new File(filePath);
              }
 
              // Extracting the data and saving
              DataHandler actualDH;
              actualDH = (DataHandler) binaryNode.getDataHandler();
 
              FileOutputStream imageOutStream = new FileOutputStream(uploadFile);
              InputStream is = actualDH.getInputStream();
              imageOutStream.write(IOUtils.getStreamAsByteArray(is));
              // setting response
              OMFactory fac = OMAbstractFactory.getOMFactory();
              OMNamespace ns = fac.createOMNamespace("http://example.org/filedata",
                            "fd");
              OMElement ele = fac.createOMElement("response", ns);
              ele.setText("true");
              return ele;
       }
 
       public OMElement download(OMElement element) throws Exception {
              System.out.println("The element for download: " + element);
              OMElement _userName = null;
              OMElement _fileName = null;
              OMElement _fileType = null;
              for (Iterator _iterator = element.getChildElements(); _iterator
                            .hasNext();) {
                     OMElement _ele = (OMElement) _iterator.next();
                     if (_ele.getLocalName().equalsIgnoreCase("userName")) {
                            _userName = _ele;
                     }
                     if (_ele.getLocalName().equalsIgnoreCase("fileName")) {
                            _fileName = _ele;
                     }
                     if (_ele.getLocalName().equalsIgnoreCase("fileType")) {
                            _fileType = _ele;
                     }
              }
              String userName = _userName.getText();
              String fileName = _fileName.getText();
              String fileType = _fileType.getText();
              String filePath = TMP_PATH + "/" + userName + "/" + fileName + "."
                            + fileType;
              System.out.println("The filePath for download: " + filePath);
              FileDataSource dataSource = new FileDataSource(filePath);
              DataHandler expectedDH = new DataHandler(dataSource);
              OMFactory fac = OMAbstractFactory.getOMFactory();
              OMNamespace ns = fac.createOMNamespace("http://example.org/filedata",
                            "fd");
              OMText textData = fac.createOMText(expectedDH, true);
              OMElement ele = fac.createOMElement("response", ns);
              ele.addChild(textData);
              return ele;
       }
}
 
4.services.xml
    
        This is a sample Web Service with two operations,echo and ping.
    
    sample.FileTransferServer
    
        urn:upload
        
    
      
        urn:download
        
    
 
将这两个文件打包并部署到Tomcat上(略)。

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