saajclient.java

< J2EE应用开发详解>>一书全部的源代码. 本书基于J2EE 1．4平台

package com.j2ee14.ch19;

import javax.xml.soap.*;
import java.io.*;
import java.awt.image.*;
import java.awt.*;
import com.sun.image.codec.jpeg.*; 
import javax.swing.JFrame;

/**
 *接收SOAP附件的客户端
 */
public class SAAJClient extends JFrame
{
	
    String endPointURLString =  "http://localhost:8080/saaj/AttachmentServlet";
	public static void main(String[] args)throws Exception
	{
		new SAAJClient();
	}
	
	public SAAJClient()
	{
		super("test image transport");	
		setSize(800, 600);
		setVisible(true);
	}
	/**
	 *从Web服务获得图像
	 */
	public Image getImageFromWebservice()
	{		
		
        try
        {
        	
	        SOAPConnectionFactory soapConnectionFactory =
	                javax.xml.soap.SOAPConnectionFactory.newInstance();
	        SOAPConnection soapConnection =
	                soapConnectionFactory.createConnection();
	
	        MessageFactory messageFactory =
	                MessageFactory.newInstance();
	        SOAPMessage soapMessage =
	                messageFactory.createMessage();
	        SOAPPart soapPart = soapMessage.getSOAPPart();
	        SOAPEnvelope requestEnvelope =
	            soapPart.getEnvelope();
	        SOAPBody body = requestEnvelope.getBody();
	        SOAPBodyElement operation = body.addBodyElement
	                (requestEnvelope.createName("getImage"));
	       
	        javax.xml.soap.SOAPElement element =
	                        operation.addChildElement(requestEnvelope.createName("test"));	     
			operation.addChildElement("testgetImage").addTextNode("getImagebyAttachment_Test");
			 
			 javax.xml.soap.SOAPMessage returnedSOAPMessage =
	                soapConnection.call(soapMessage, endPointURLString);
	      
	       System.out.println("========");
	       java.util.Iterator it = returnedSOAPMessage.getAttachments();
	        BufferedImage image=null ;
			while (it.hasNext()) {
	     	  AttachmentPart	   attachment = (AttachmentPart)it.next();
			  printAttachmentInfo(attachment);
			  image= decodeImage(attachment.getDataHandler().getInputStream());			  			
		
			}
			return image;
		}
		catch(Exception e)
		{
			e.printStackTrace();
			return null;
		}			
	}
	
	//把附件解码成Image
	public BufferedImage decodeImage(java.io.InputStream in)throws java.io.IOException
	{
		BufferedImage image=null ;
		image = new BufferedImage(600,800, BufferedImage.TYPE_INT_RGB); 			 
	    com.sun.image.codec.jpeg.JPEGImageDecoder dencoder =JPEGCodec.createJPEGDecoder(in); 
		image=dencoder.decodeAsBufferedImage();	
		return image;
	}
	
	//打印附件的一些信息
	private void printAttachmentInfo( AttachmentPart attachment)throws Exception
	{
		Object content = attachment.getContent();
		/**
		 *打印附件的一些信息
		 */
		System.out.println("ContentLocation="+attachment.getContentLocation());
		System.out.println("Contentsize="+attachment.getSize());
	    System.out.println("ContentType="+attachment.getContentType());
	    String id = attachment.getContentId();			  
		System.out.print("Attachment " + id + " contains: " +content);
	}
	
    public void paint(Graphics  g)
	{
		super.paint(g);
 		Image img = getImageFromWebservice();	     
		g.drawImage(img,0,0,null);		
	}
			  
	
}