chartgraphics.java

用java写得一个数字签名的小东西

package turing;

import java.io.*; 
import java.util.*; 
import com.sun.image.codec.jpeg.*; 
import java.awt.image.*; 
import java.awt.*; 

public class ChartGraphics
{ 
	BufferedImage image;
	int imageWidth ;
	int imageHeight ;
	int[][] xs;
	int[][] ys;
	String fileName;
	
	public void createImage()
	{ 
		try
		{ 
			FileOutputStream fos = new FileOutputStream(fileName); 
			BufferedOutputStream bos = new BufferedOutputStream(fos); 
			JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos); 
			encoder.encode(image); 
			bos.close(); 
		} 
		catch(Exception e)
		{ 
			System.out.println(111111); 
		} 
	} 

	public void graphicsGeneration( )
	{ 
		image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB); 
		
		Graphics graphics = image.getGraphics(); 		
		graphics.setColor( new Color(255,255,255));
		graphics.fillRect(0,0,imageWidth,imageHeight); 
		
		graphics.setColor(Color.BLACK); 

		for(int i=0;i<xs.length;i++)
		{
			graphics.drawPolyline(xs[i],ys[i],xs[i].length);
		}
			
		createImage( ); 		
	} 
	
	public void setImageWidth(int imageWidth)
	{
		this.imageWidth=imageWidth;
	}
	
	public void setImageHeight(int imageHeight)
	{
		this.imageHeight=imageHeight;
	} 
	
	public void setXs(String xps)
	{
		String[]  x_bis=xps.substring(0,xps.length()-1).split("@");
		xs=new int[x_bis.length][];
		
		for(int i=0;i<xs.length;i++)
		{
			String[]  x_dians=x_bis[i].split(",");
			xs[i]=new int[x_dians.length];
			for(int j=0;j<x_dians.length;j++)
			{			
				xs[i][j]=Integer.parseInt(x_dians[j]);
			}
		}
	}
	
	public void setYs(String yps)
	{
		String[]  y_bis=yps.substring(0,yps.length()-1).split("@");
		ys=new int[y_bis.length][];
		
		for(int i=0;i<ys.length;i++)
		{
			String[]  y_dians=y_bis[i].split(",");
			ys[i]=new int[y_dians.length];
			for(int j=0;j<y_dians.length;j++)
			{			
				ys[i][j]=Integer.parseInt(y_dians[j]);
			}
		}	
	}
	
	public void setFileName(String fileName)
	{
		this.fileName=fileName;
	}	
}