Problem saving and loading multiple images in the same file
HelloI am having a problem, I have a thah program creates a fileOutputSteam and a gzipOutputSteam and finally an imageIO wrote several images, then I do the reverse process, a
FileInputsteam and an inputsteam of gzip, imageIO.read read only image of frist, not the rest.
Can someone help me?
PS: Sorry for my bad English, I'm Spanish
Code:
class Lector {
// Atributos
private String ruta;
private static Collection<Imagen> imagenes;
/**
* Clase que carga un fichero .zip lleno de imagenes
* @param ruta: ruta donde se halla el fichero .zip a cargar
*/
public Lector(String ruta) {
}
/**
* Constructor sin parametros
*/
public Lector() {
}
/**
* Metodo que setea el archivo que queremos cargar
* @param ruta: Ruta del fichero a cargar
*/
public void setArchivo(String ruta) {
this.ruta = ruta;
imagenes = new ArrayList<Imagen>();
}
/**
*
* @param output: Lugar donde sera representada la salida de la carga de imagenes
* @return retorna 1 si la carga fue bien y 0 si fue mal
* @throws FileNotFoundException : excepcion por no haber encontrado el fichero
* @throws IOException: excepcion por no poder leer el fichero
*/
public int cargarImagenes(JTextArea output) throws FileNotFoundException, IOException {
ZipEntry entrada;
int contador = 0;
String archTemp = "temp.jpg";
FileInputStream fis = new FileInputStream(ruta);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
BufferedOutputStream dest = null;
byte[] data = new byte[9000];
// Leemos secuencialmente el archivo zip
while ((entrada = zis.getNextEntry()) != null) {
File bufferTemporal = new File(archTemp);
System.out.println("Archivo " + entrada.getName() + " cargado!");
output.append("Archivo " + entrada.getName() + " cargado!\n");
if (!entrada.isDirectory()) {
FileOutputStream fos = new FileOutputStream(bufferTemporal);
dest = new BufferedOutputStream(fos, 9000);
while ((contador = zis.read(data, 0, 9000)) != -1) {
dest.write(data, 0, contador);
}
//Cerramos los buffers
dest.flush();
dest.close();
fos.flush();
fos.close();
FileInputStream fin = new FileInputStream(bufferTemporal);
BufferedImage bi = ImageIO.read(fin);
//Guardamos el fichero
imagenes.add(new Imagen(bi, entrada.getName()));
}
bufferTemporal.delete();
}
// Cerramos los bufferes
fis.close();
zis.close();
saveAsGzip("dato.gz");
loadAsGzip("dato.gz");
return 1;
}
/**
* Funcion que carga la simagenes de dentro del .zip y las guarda en el objeto Imagen
* @return retorna 1 si la carga fue exitosa
* @throws FileNotFoundException: Excepcion por no encontrar el archivo
* @throws IOException: Excepcion por no poder leer el archivo
*/
public int cargarImagenes() throws FileNotFoundException, IOException {
ZipEntry entrada;
int contador = 0;
String archTemp = "temp.jpg";
FileInputStream fis = new FileInputStream(ruta);
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
BufferedOutputStream dest = null;
byte[] data = new byte[9000];
// Leemos secuencialmente el archivo zip
while ((entrada = zis.getNextEntry()) != null) {
File bufferTemporal = new File(archTemp);
System.out.println("Archivo " + entrada.getName() + " cargado!");
if (!entrada.isDirectory()) {
FileOutputStream fos = new FileOutputStream(bufferTemporal);
dest = new BufferedOutputStream(fos, 9000);
while ((contador = zis.read(data, 0, 9000)) != -1) {
dest.write(data, 0, contador);
}
dest.flush();
dest.close();
fos.flush();
fos.close();
java.io.FileInputStream fin = new FileInputStream(bufferTemporal);
BufferedImage bi = ImageIO.read(fin);
imagenes.add(new Imagen(bi, entrada.getName()));
}
}
// Cerramos los bufferes
fis.close();
zis.close();
dest.flush();
dest.close();
return 1;
}
/**
* Funcion que retorna el array de peliculas
* @return retorna el array de peliculas
*/
public Collection<Imagen> getImagenes() {
return imagenes;
}
public int saveAsGzip(String pathFichero) throws FileNotFoundException, IOException{
FileOutputStream fos = new FileOutputStream(new File(pathFichero));
//GZIPOutputStream gzip = new GZIPOutputStream(fos);
BufferedImage temp2;
Imagen img;
Iterator ite = imagenes.iterator();
while(ite.hasNext()){
img = (Imagen) ite.next();
temp2=img.getBufferedImagen();
boolean i= ImageIO.write(temp2, "JPEG", fos);
System.out.println(i);
}
System.out.println();
//gzip.finish();
fos.flush();
fos.close();
//gzip.close();
return 1;
}
public int loadAsGzip(String pathFichero) throws FileNotFoundException, IOException{
imagenes.clear();
FileInputStream fos = new FileInputStream(new File(pathFichero));
//GZIPInputStream gzip = new GZIPInputStream(fos);
BufferedImage img;
for(int i=0;i<=100; i++){
img=ImageIO.read(fos);
if (img != null){System.out.println(img);
imagenes.add(new Imagen(img, String.valueOf(i)));}
}
// gzip.close();
fos.close();
return 1;
}
}Moderator action: added
tags to source. 805814 wrote:
Oh, sorry again, Ii have commented on all of the code not clear in my best English and posted the image of class:
(sigh) OK, it's an improvement, but it is not yet an NBS! I think it would take me less time to write code that is a NBS that try to explain more (perhaps an example is better here?). In all cases, your code still seems to be mixing the two Zip and GZip. I've never dealt with GZip and could not be disturbed from now just for this problem, so I focused on using the Zip classes.
Try this code:
import java.awt.*;
import java.awt.image.*;
import javax.swing.*;
import javax.imageio.*;
import java.util.*;
import java.util.zip.*;
import java.io.*;
/** SSCCE that demonstrates how to:
1) Create some random images.
2) Store them to a Zip File.
3) Restore them from a Zip File
Please study the code carefully, and note how in a single Java source of less
than 100 lines of code, it manages to achieve the entire demo.!
@author Andrew Thompson */
class StoreImagesAsZip {
static Random random;
static int size = 60;
public static BufferedImage getRandomImage() {
BufferedImage bi = new BufferedImage(size,size,BufferedImage.TYPE_INT_RGB);
Graphics2D g = bi.createGraphics();
GradientPaint gp = new GradientPaint(
(float)random.nextInt(size),
(float)random.nextInt(size),
new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255) ),
(float)random.nextInt(size),
(float)random.nextInt(size),
new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255) )
);
g.setPaint(gp);
g.fillRect(0,0,size,size);
return bi;
}
static public void writeImagesToZip(File file, BufferedImage[] images) throws Exception {
OutputStream os = new FileOutputStream(file);
ZipOutputStream zos = new ZipOutputStream(os);
// Zip does nothing for otherwise compressed media formats such as JPEG and PNG
zos.setLevel( ZipOutputStream.STORED );
for (int ii=0; ii< images.length; ii++) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(images[ii], "png", baos);
ZipEntry ze = new ZipEntry( ii + ".png" );
zos.putNextEntry( ze );
zos.write( baos.toByteArray() );
zos.closeEntry();
}
zos.flush();
zos.close();
}
static public BufferedImage[] readImagesFromZip(File file) throws Exception {
ArrayList images = new ArrayList();
ZipFile zipFile = new ZipFile(file);
Enumeration en = zipFile.entries();
while (en.hasMoreElements()) {
ZipEntry ze = (ZipEntry)en.nextElement();
InputStream is = zipFile.getInputStream(ze);
BufferedImage bi = ImageIO.read(is);
images.add(bi);
}
BufferedImage[] imageArray = new BufferedImage[images.size()];
for (int ii=0; ii
Also note that I now invested a lot of time trying to help you. If you like what I've done, the best way to show that is on the occasion of my responses as "Helpful" or "correct". If the problem is "answered", make sure that mark also.
Tags: Java
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