messageimage.java

比较简单学生查询系统

package com.fi;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
public class MessageImage 
{
public static BufferedImage makeMessageImage(String message,String fontName,int fontSize)
{
	Font font=new Font(fontName,Font.PLAIN,fontSize);
	FontMetrics metrics=getFontMetrics(font);
	int messageWidth=metrics.stringWidth(message);
	int baselineX=messageWidth/10;
	int width=messageWidth+2*(baselineX+fontSize);
	int height=fontSize*7/2;
	int baselineY=height*8/10;
	BufferedImage messageImage= new BufferedImage(width,height,
			BufferedImage.TYPE_INT_RGB);
	Graphics2D g2d=(Graphics2D)messageImage.getGraphics();
	g2d.setBackground(Color.white);
	g2d.clearRect(0, 0, width, height);
	g2d.setFont(font);
	g2d.translate(baselineX, baselineY);
	g2d.setPaint(Color.lightGray);
	AffineTransform origTransform=g2d.getTransform();
	g2d.shear(-0.95,0);
	g2d.scale(1, 3);
	g2d.drawString(message, 0, 0);
	g2d.setTransform(origTransform);
	g2d.setPaint(Color.black);
	g2d.drawString(message, 0, 0);
	return (messageImage);	
}

public static void writeJPEG(BufferedImage image,
		OutputStream out)
{
	try
	{
		ImageIO.write(image, "jpg", out);
	}
	catch (IOException ioe)
	{
	System.err.println("Error writing JPEG file:"+ioe);	
	}
}

public static void writeJPEG(BufferedImage image,
		File file)
{
	try
	{
		ImageIO.write(image, "jpg", file);
	}
	catch (IOException ioe)
	{
	System.err.println("Error writing JPEG file:"+ioe);	
	}
}

public static String[] getFontNames()
{
	GraphicsEnvironment env=GraphicsEnvironment.getLocalGraphicsEnvironment();
	return (env.getAvailableFontFamilyNames());
}

private static FontMetrics getFontMetrics(Font font)
{
	BufferedImage tempImage=new BufferedImage(1,1,BufferedImage.TYPE_INT_RGB);
	Graphics2D g2d=(Graphics2D)tempImage.getGraphics();
	return (g2d.getFontMetrics(font));
	
}
}