在服务器端动态生成gif or jpg示例

package web.images;

/**
* 此处插入类型描述。
* 创建日期：(2002-6-6 9:59:00)
* @author：Administrator
*/
import java.io.*;

import java.util.*;

import com.sun.image.codec.jpeg.*;

import java.awt.image.*;

import java.awt.*;


public class ChartGraphics {

BufferedImage image;

public 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) {

System.out.println(e);

}

}


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


final int X=10;

int imageWidth = 800;//图片的宽度

int imageHeight =900;//图片的高度

int columnWidth=70;//柱的宽度

int columnHeight=800;//柱的最大高度


ChartGraphics chartGraphics = new ChartGraphics();

chartGraphics.image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);

Graphics graphics = chartGraphics.image.getGraphics();

graphics.setColor(Color.white);

graphics.fillRect(0,0,imageWidth,imageHeight);

graphics.setColor(Color.black);
//graphics.setXORMode(Color.blue);
graphics.drawLine(columnWidth+X,columnHeight-h5-50,columnWidth+X,columnHeight);//Y轴

graphics.drawLine(columnWidth+X,columnHeight-h5-50,columnWidth+X-10,columnHeight-h5-40);//Y轴箭头左

graphics.drawLine(columnWidth+X,columnHeight-h5-50,columnWidth+X+10,columnHeight-h5-40);//Y轴箭头右

graphics.drawLine(750,columnHeight,columnWidth+X,columnHeight);//X轴

graphics.drawLine(750,columnHeight,740,columnHeight-10);//X轴

graphics.drawLine(750,columnHeight,740,columnHeight+10);//X轴

graphics.setColor(Color.yellow);

graphics.fillRect(X+1*columnWidth+10, columnHeight-h1, columnWidth, h1);

graphics.fillRect(X+2*columnWidth+20, columnHeight-h2, columnWidth, h2);

graphics.fillRect(X+3*columnWidth+30, columnHeight-h3, columnWidth, h3);

graphics.fillRect(X+4*columnWidth+40, columnHeight-h4, columnWidth, h4);

graphics.fillRect(X+5*columnWidth+50, columnHeight-h5, columnWidth, h5);

//graphics.drawString()

chartGraphics.createImage("D:\\leaderquery\\leaderqueryWeb\\web800\\images\\chart.jpg");

}

}