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Loading..AMChart to PNG file - JFreeChart Library use...
2008.09.11

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Loading..[Servlet] Redirection!
2007.04.18

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AMChart to PNG file - JFreeChart Library use...

Computer_IT/JAVA2008. 9. 11. 19:38

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AMChart 를 PNG 파일로 저장하는 코드...
org.jfree.chart.ChartUtilities의 writeBufferedImageAsPNG 이용...

import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* export as image by amcharts
* AmChart를 PNG 이미지로 저장.
* 
* 2008. 09. 11 : sarangsai.com
**/
public class createImgServlet extends HttpServlet{
	private static final long serialVersionUID = 1L;

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		  doGet(request, response);
		}
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		execute(req, resp);
	}
     protected void execute(HttpServletRequest request, HttpServletResponse response) throws IOException
     {
         String heightStr = request.getParameter("height")==null?"0":request.getParameter("height");
         String widthStr = request.getParameter("width")==null?"0":request.getParameter("width");
         String filename = request.getParameter("filename")==null?"SaveChart.png":request.getParameter("filename");
         int height=Integer.parseInt(heightStr.indexOf(".")==-1?heightStr:heightStr.substring(0,heightStr.indexOf(".")));
         int width=Integer.parseInt(widthStr.indexOf(".")==-1?widthStr:widthStr.substring(0,widthStr.indexOf(".")));
        
         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
         
         Graphics g = image.getGraphics();
         
         String current_row="";
         try{
             for(int i=0;i<height;i++){
                 current_row=request.getParameter("r"+i)==null?"":request.getParameter("r"+i);
                 String current_col[]=current_row.split(",");
                 int current_width=1;
                 for(int m=0;m<current_col.length;m++){
                     String pixel[]=current_col[m].split(":");
                     
                     if(pixel.length>1){
                         g.setColor(this.charColor(pixel[0]));
                         g.drawLine(current_width, i, current_width+Integer.parseInt(pixel[1]), i);
                         current_width=current_width+Integer.parseInt(pixel[1]);
                     }else if(pixel.length==1){
                         g.setColor(this.charColor(pixel[0]));
                         g.drawLine(current_width, i, current_width+1, i);
                         current_width++;
                     }
                     
                     
                 }
             }
         }catch(Exception e){
             e.printStackTrace();
         }    
         g.create();
         image.flush();
         response.setContentType("image/png");
         response.setContentType("APPLICATION/OCTET-STREAM");
         response.setHeader("Content-Disposition","attachment; filename=\"" + filename + "\"");
         ServletOutputStream out = response.getOutputStream();
         org.jfree.chart.ChartUtilities.writeBufferedImageAsPNG(out, image);
         out.close();
     }
     
     
     public Color charColor(String hex){
         for(int i=0;i<6;i++){
             if(hex.length()<6)hex="0"+hex;
         }
         int r=this.HtoD(hex.substring(0,2));
         int g=this.HtoD(hex.substring(2,4));
         int b=this.HtoD(hex.substring(4,6));
         
         Color color = new Color(r,g,b);
         return color;
     }
     
     public int HtoD(String hex){
         return Integer.valueOf(hex, 16);
     }
}

amchart의 setting 파일에 다음 내용 추가...

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[Servlet] Redirection!

Computer_IT/JSP2007. 4. 18. 09:45

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RequestDispatcher rd = null;

rd = getServletContext().getRequestDispatcher("/mainFrame.jsp");
rd.forward(request, response);

Servlet Redirection Example

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AMChart to PNG file - JFreeChart Library use...

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