JAVA版的相册制作程序
时间:2011-08-18
import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class Zoom {
String srcPath;
StringBuffer html;
int count;
public Zoom(String srcPath) {
this.srcPath = srcPath;
init();
}
public void zoom(File input) {
//输出的位置
String output = getOutputPath();
try {
InputStream imageStream = new FileInputStream(input);
//根据目标图片建立一个缓存图片
JPEGImageDecoder decoderFile = JPEGCodec.createJPEGDecoder(imageStream);
BufferedImage imageFile = decoderFile.decodeAsBufferedImage();
float zoom = 0.12F; //你要方缩的比例
//获得目标图片的宽高，同时乘以放缩比例得到新图片大小
int w = (int) (imageFile.getWidth() * zoom);
int h = (int) (imageFile.getHeight() * zoom);
//建立一个新图片的缓存图片
BufferedImage bufImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
String zoomFile = output + "/zooms_" + input.getName();
FileOutputStream out = new FileOutputStream(zoomFile);
//从目标图片上获得Graphics以便画在新图片上，最后一个参数是内部无名类，可以用null代替
Graphics g = bufImage.getGraphics();
g.drawImage(imageFile, 0, 0, w, h, new ImageObserver() {
public boolean imageUpdate(Image img, int infoflags, int x, int y, int width, int height) {
return true;
}
});
//编码输出
JPEGImageEncoder jpeg = JPEGCodec.createJPEGEncoder(out);
jpeg.encode(bufImage);
out.flush();
out.close();
imageStream.close();
int row = count % 3;
if (row == 0) {
html.append("/n/t<tr>");
}
html.append("/n/t/t<td align=''center''><a href=''").append(input.getName()).append("'' target=''_blank''>");
html.append("<img src=''zoom" + "/zooms_" + input.getName() + "'' border=''0''><br>");
html.append(input.getName() + "</a></td>");
if (row == 2) {
html.append("/n/t</tr>");
}
count++;
} catch (Exception e) {
e.printStackTrace();
}
}
public void process() {
File[] files = getFiles();
mkdirs();
for (int i = 0; i < files.length; i++) {
zoom(files[i]);
}
trail();
outputHtmlFile();
}
private File[] getFiles() {
File path = new File(srcPath);
File[] files = path.listFiles(new FileFilter() {
public boolean accept(File pathname) {
if (pathname == null)
return false;
String ext = pathname.getName().substring(pathname.getName().lastIndexOf(".") + 1).toUpperCase();
return ext.equals("JPG") || ext.equals("JPEG");
}
});
return files;
}
private void mkdirs() {
File zoomPath = new File(getOutputPath());
zoomPath.mkdirs();
}
private String getOutputPath() {
return srcPath + "/zo
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