Hi,
Recently i wanted to compress images when uploading using Postgresql and hibernate. I implemented below code :
Image compressor utility code below ::
Now in your Upload Action, write below codeRecently i wanted to compress images when uploading using Postgresql and hibernate. I implemented below code :
Image compressor utility code below ::
package com.utils;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.renderable.ParameterBlock;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.MemoryCacheImageOutputStream;
import javax.media.jai.JAI;
import javax.media.jai.RenderedOp;
import com.sun.media.jai.codec.SeekableStream;
/**
*
* @author Ujjwal Soni
*
*/
public class ImageCompressor {
public byte[] compressFile(byte[] content, String fileName)
throws FileNotFoundException {
BufferedImage input = null;
InputStream ips = null;
ByteArrayOutputStream baout = new ByteArrayOutputStream();
try {
ips = new ByteArrayInputStream(content);
if (fileName.endsWith(".jpg") || fileName.endsWith(".JPG") || fileName.endsWith(".jpeg") || fileName.endsWith(".JPEG")) {
input = ImageIO.read(ips);
} else if (fileName.endsWith(".gif") || fileName.endsWith(".GIF")) {
input = ImageIO.read(ips);
} else if (fileName.endsWith(".bmp") || fileName.endsWith(".BMP")) {
// Wrap the InputStream in a SeekableStream.
SeekableStream s = SeekableStream.wrapInputStream(ips, false);
// Create the ParameterBlock and add the SeekableStream to it.
ParameterBlock pb = new ParameterBlock();
pb.add(s);
// Perform the BMP operation
RenderedOp img1 = JAI.create("BMP", pb);
input = getBufferedImage(img1.getAsBufferedImage());
} else if (fileName.endsWith(".png") || fileName.endsWith(".PNG")) {
SeekableStream s = SeekableStream.wrapInputStream(ips, false);
// Create the ParameterBlock and add the SeekableStream to it.
ParameterBlock pb = new ParameterBlock();
pb.add(s);
// Perform the PNG operation
RenderedOp img1 = JAI.create("PNG", pb);
input = getBufferedImage(img1.getAsBufferedImage());
}
if (input == null)
return null;
// Get Writer and set compression
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
if (iter.hasNext()) {
ImageWriter writer = (ImageWriter) iter.next();
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
float values[] = iwp.getCompressionQualityValues();
System.out.println("compression Quality >> "+values[2]);
iwp.setCompressionQuality(0.2f);
//BufferedImage image = ImageIO.read(ips);
IIOImage image1 = new IIOImage(input, null, null);
writer.setOutput(new MemoryCacheImageOutputStream(baout));
// writer.write(null, new IIOImage(image, null, null), iwp);
writer.write(null, image1, iwp);
input.flush();
writer.dispose();
writer = null;
image1 = null;
input = null;
}
} catch (FileNotFoundException finfExcp) {
System.out.println(finfExcp);
} catch (IOException ioExcp) {
System.out.println(ioExcp);
}
return baout.toByteArray();
}
private BufferedImage getBufferedImage(Image img) {
// if the image is already a BufferedImage, cast and return it
// if ((img instanceof BufferedImage)) {
// return (BufferedImage) img;
// }
// otherwise, create a new BufferedImage and draw the original
// image on it
int w = img.getWidth(null);
int h = img.getHeight(null);
int thumbWidth = 330;
int thumbHeight = 250;
// if width is less than 330 keep the width as it is.
if (w < thumbWidth)
thumbWidth = w;
// if height is less than 250 keep the height as it is.
if (h < thumbHeight)
thumbHeight = h;
// if less than 330*250 then do not compress
if (w > 330 || h > 250) {
double imageRatio = (double) w / (double) h;
double thumbRatio = (double) thumbWidth / (double) thumbWidth;
if (thumbRatio < imageRatio) {
thumbHeight = (int) (thumbWidth / imageRatio);
} else {
thumbWidth = (int) (thumbHeight * imageRatio);
}
}
// draw original image to thumbnail image object and
// scale it to the new size on-the-fly
BufferedImage bi = new BufferedImage(thumbWidth, thumbHeight,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = bi.createGraphics();
g2d.drawImage(img, 0, 0, thumbWidth, thumbHeight, null);
g2d.dispose();
return bi;
}
}
for(FileBean fileBean: fileList){
if(fileBean.getActualFile()!=null && fileBean.getActualFile().getFileSize()>0)
{
//byte[] bFile = new byte[ fileBean.getActualFile().getFileSize()];
byte[] bFile = fileBean.getFileContent();
fileBean.getActualFile().getInputStream().read(bFile);
MyDocumentImage mydocimage=new MyDocumentImage();
//MyDocumentImageId mydocimageId=new MyDocumentImageId();
mydocimage.setMyDocImage(new MyDocImageType(fileType));
if (fileBean.getActualFile().getFileName().endsWith(".jpg") || fileBean.getActualFile().getFileName().endsWith(".JPG") || fileBean.getActualFile().getFileName().endsWith(".jpeg") || fileBean.getActualFile().getFileName().endsWith(".JPEG") || fileBean.getActualFile().getFileName().endsWith(".gif") || fileBean.getActualFile().getFileName().endsWith(".GIF") || fileBean.getActualFile().getFileName().endsWith(".bmp") || fileBean.getActualFile().getFileName().endsWith(".BMP") || fileBean.getActualFile().getFileName().endsWith(".png") || fileBean.getActualFile().getFileName().endsWith(".PNG") && fileBean.getActualFile().getFileSize()>300000)
{
mydocimage.setDocContent(img.compressFile(bFile, fileBean.getActualFile().getFileName()));
}
else
{
mydocimage.setDocContent(bFile);
}
mydocimage.setDocCreatedBy(userId);
mydocimage.setDocCreatedDate(new Timestamp(System.currentTimeMillis()));
mydocimage.setSdocLatest(true);
mydocimage.setSdocMimeType(fileBean.getActualFile().getContentType());
mydocimage.setSdocFileName(fileBean.getActualFile().getFileName());
mydocimage.setDocActive("Y");
mydocimage.setDocVersion(1);
//String docSeq = commonDAO.getNextSequence("my_doc.seq");
//mydocimage.setSCode(Integer.valueOf(sdocSeq));
//mydocimage.setSdocDtlCode(fileType);
//mydocimage.setSMewCode(staStall.getId().getStaBusCode());
//mydocimage.setSCode(staStall.getId().getStaCode());
//mydocimage.setId(mydocimageId);
mydocimage.setDs(dStp);
myDocList.getMyDocumentImages().add(mydocimage);
}
}
Thats it, above code will compress images of particular size. Email me if you need source code or guidance on this.
Cheers,
Ujjwal Soni
