這個網站不錯 有很多的JAVA API 範例可以參考





http://www.java2s.com/Code/Java/2D-Graphics-GUI/Drawtext.htm

how to generate jpeg from java ? for example :

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.geom.Line2D;

import java.awt.image.BufferedImage;

import java.awt.image.RenderedImage;

import java.io.File;

import java.io.IOException;

import javax.imageio.ImageIO;

public class ff {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

new ff().p();

}

// Create an image to save

public void p(){

RenderedImage rendImage = myCreateImage();

// Write generated image to a file

try {

// Save as JPEG

File file = new File("c:/newimage.jpg");

ImageIO.write(rendImage, "jpg", file);

} catch (IOException e) {

}

}

// Returns a generated image.

public BufferedImage myCreateImage(){

int width = 300;

int height = 200;

// Create a buffered image in which to draw

BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

// Create a graphics contents on the buffered image

Graphics2D g2d = bufferedImage.createGraphics();

// Draw graphics

g2d.setColor(Color.white);

g2d.fillRect(0, 0, width, height);

g2d.setPaint(Color.gray);

g2d.draw(new Line2D.Double(5, 7, 200, 200));

g2d.drawString("Line2D", 5, 8);

g2d.dispose();

return bufferedImage;

}

}