exportpng.java

来自「用Java开发的、实现类似Visio功能的应用程序源码」· Java 代码 · 共 79 行

/**
 *    $Id: ExportPNG.java $
 *
 *    Copyright 2004 ~ 2005 JingFei International Cooperation LTD. All rights reserved.
 *
 */
package com.jfimagine.jfgraph.transfer;


import java.io.File;
import java.io.IOException;
import javax.imageio.*;
import javax.imageio.stream.*;
//import com.sun.media.jai.codec.*;
//import com.sun.media.jai.codecimpl.*;
//import javax.media.jai.*;

import java.awt.image.BufferedImage;

import com.jfimagine.utils.log.*;

 /**
 * ExportPNG class is used to output PNG images.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.3.0 $
 */ 
 
public class ExportPNG extends ExportBase{


	/**an internal log utility*/
	private JFLogger m_logger=JFLogManager.getLogger(this.getClass());
	
   	/** 
    	*  Export current page or list to a specified file.
    	*  @param fileName A specified file name to be exported.
    	*/
   	public boolean export(String fileName){
		try{  
			BufferedImage image=getImage();

			File file = new File(fileName);
        		ImageIO.write(image, "png", file);
        		return true;      
        		
    			//PNGEncodeParam png = PNGEncodeParam.getDefaultEncodeParam(image);
    			//png.setPhysicalDimension(11811, 11811, 1);
    			//JAI.create("filestore", image, fileName, "PNG");  
    			//return true;
        		
        		

        	}catch(Exception e){
        		m_logger.error("export:"+e);
        		return false;
        	}
        	
       }
 
   	/** 
    	*  get export file extension.
    	*  @return the export file extension.
    	*/
   	public String getExportFileExt(){
   		return JFFileFilter.FILEEXT_PNG;
	}

   	/** 
    	*  get export file description
    	*  @return the export file description
    	*/
   	public String getExportFileDesc(){
   		return JFFileFilter.FILEDESC_PNG;
	}
 
}