用java生成jpg图片

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.awt.image.BufferedImage;
import java.awt.*;
import java.util.Random;

/**
* Created by IntelliJ IDEA.
* User: Administrator
* Date: 2005-6-10
* Time: 11:19:49
* This class can create jpg picture.
* To change this template use File | Settings | File Templates.
*/
public class ChartGraphics {
BufferedImage image;

void createImage(String fileLocation) {
try {
FileOutputStream fos = new FileOutputStream(fileLocation);
BufferedOutputStream bos = new BufferedOutputStream(fos);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(bos);
encoder.encode(image);
bos.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public void graphicsGeneration(int h1, int h2, int h3, int h4, int h5) {

final int X = 10;
int imageWidth = 300;//图片的宽度
int imageHeight = 300;//图片的高度
int columnWidth = 30;//柱的宽度
int columnHeight = 200;//柱的最大高度

// ChartGraphics chartGraphics = new ChartGraphics();
image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
Graphics graphics = image.getGraphics();
graphics.setColor(Color.white);
graphics.fillRect(0, 0, imageWidth, imageHeight);
graphics.setColor(Color.red);
graphics.drawRect(X + 1 * columnWidth, columnHeight - h1, columnWidth, h1);
graphics.drawRect(X + 2 * columnWidth, columnHeight - h2, columnWidth, h2);
graphics.drawRect(X + 3 * columnWidth, columnHeight - h3, columnWidth, h3);
graphics.drawRect(X + 4 * columnWidth, columnHeight - h4, columnWidth, h4);
graphics.drawRect(X + 5 * columnWidth, columnHeight - h5, columnWidth, h5);
createImage("D://Temp//chart.jpg");
}

public static void main(String[] args) {
int[] height = {40,50,16,22,85};
ChartGraphics cg=new ChartGraphics();
try {
for (int i = 0; i < 5; i++) {
cg.graphicsGeneration(height[0],height[1],height[2],height[3],height[4]);
}
} catch (Exception e) {
e.printStackTrace();
}

}
}