prabhat kumar

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Recent posts by prabhat kumar

Struts Logging

Originally posted by N Nanda:
Hi all,

I am using struts 1.1 with Tomcat5.0.16 for my project. I have configured tomcat's server.xml file and set my own context (its in D:\myweb). Not I want to have my own log file in D:\myweb\WEB-INF\logs folder. can anyone help me how i can do it. Its an urgency.

Thanks in advance.

N Nanda

download log4j, place in lib directory of webapps/lib

configure your log4j.properties like below and put it under web-inf/classes

# Global logging configuration
log4j.rootLogger=WARN, fileout, stdout
# replace com.lecare with your package names for which you want logging support
log4j.logger.com.lecare=DEBUG

# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p %d{HH:mm:ss} [%t] - %m%n

# Rolling log file output...
log4j.appender.fileout=org.apache.log4j.RollingFileAppender
log4j.appender.fileout.File=c:/actions.log
#log4j.appender.fileout.File=c:/webserve/log/actions.log
log4j.appender.fileout.MaxFileSize=1024KB
log4j.appender.fileout.MaxBackupIndex=5
log4j.appender.fileout.layout=org.apache.log4j.PatternLayout
log4j.appender.fileout.layout.ConversionPattern=%5p %d{dd MMM HH:mm:ss} [%t] (%F:%L) - %m%n

import logging classes:
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

declare logger for the class
private Log logger = LogFactory.getLog(this.getClass());

for more information on using log4j read log4j documentation.

20 years ago

Struts

Retrieving pixel data

as i understood the problem .. you need to first know the value of user then do some work and then deliver the image.
this can be done in this way ..

1. create a servlet with the name gif in package test .. so that it can be called like
2. set the contenttype for gif image type like this
response.setContentType("image/jpeg"); //change for fig images
3. extract parameter
String user = request.getParameter("user");
4. forward to actual image
response.sendRedirect("http://www.abc.com/grafik/pic.jpg");

20 years ago

JSP

Vector with bean:write tag

use collection instead of Vector.

20 years ago

Struts

Getting Image height in a JSP

use this class to know the general properties of image files.
everything is included in the code. just go through it. :-)

package utils;
import java.io.DataInput;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.Vector;
public class imageInfo {
/**
* Return value of {@link #getFormat()} for JPEG streams.
* ImageInfo can extract physical resolution and comments
* from JPEGs (only from APP0 headers).
* Only one image can be stored in a file.
*/
public static final int FORMAT_JPEG = 0;
/**
* Return value of {@link #getFormat()} for GIF streams.
* ImageInfo can extract comments from GIFs and count the number
* of images (GIFs with more than one image are animations).
*/
public static final int FORMAT_GIF = 1;
/**
* Return value of {@link #getFormat()} for PNG streams.
* PNG only supports one image per file.
* Both physical resolution and comments can be stored with PNG,
* but ImageInfo is currently not able to extract those.
*/
public static final int FORMAT_PNG = 2;
/**
* Return value of {@link #getFormat()} for BMP streams.
* BMP only supports one image per file.
* BMP does not allow for comments.
* The physical resolution can be stored.
* <em>The specification that I have says that the values must be
* interpreted as dots per meter. However, given that I only
* encounter typical dpi values like 72 or 300, I currently
* consider those values dpi. Maybe someone can shed some light
* on this, please send me a mail in that case.</em>
*/
public static final int FORMAT_BMP = 3;
/**
* Return value of {@link #getFormat()} for PCX streams.
* PCX does not allow for comments or more than one image per file.
* However, the physical resolution can be stored.
*/
public static final int FORMAT_PCX = 4;
/**
* Return value of {@link #getFormat()} for IFF streams.
*/
public static final int FORMAT_IFF = 5;
/**
* Return value of {@link #getFormat()} for RAS streams.
* Sun Raster allows for one image per file only and is not able to
* store physical resolution or comments.
*/
public static final int FORMAT_RAS = 6;
/** Return value of {@link #getFormat()} for PBM streams. */
public static final int FORMAT_PBM = 7;
/** Return value of {@link #getFormat()} for PGM streams. */
public static final int FORMAT_PGM = 8;
/** Return value of {@link #getFormat()} for PPM streams. */
public static final int FORMAT_PPM = 9;
/** Return value of {@link #getFormat()} for PSD streams. */
public static final int FORMAT_PSD = 10;
/** Return value of {@link #getFormat()} for SWF (Shockwave) streams. */
public static final int FORMAT_SWF = 11;
/**
* The names of all supported file formats.
* The FORMAT_xyz int constants can be used as index values for
* this array.
*/
private static final String[] FORMAT_NAMES =
{"JPEG", "GIF", "PNG", "BMP", "PCX",
"IFF", "RAS", "PBM", "PGM", "PPM",
"PSD", "SWF"};
/**
* The names of the MIME types for all supported file formats.
* The FORMAT_xyz int constants can be used as index values for
* this array.
*/
private static final String[] MIME_TYPE_STRINGS =
{"image/jpeg", "image/gif", "image/png", "image/bmp", "image/pcx",
"image/iff", "image/ras", "image/x-portable-bitmap", "image/x-portable-graymap", "image/x-portable-pixmap",
"image/psd", "application/x-shockwave-flash"};
private int width;
private int height;
private int bitsPerPixel;
private int format;
private InputStream in;
private DataInput din;
private boolean collectComments = true;
private Vector comments;
private boolean determineNumberOfImages;
private int numberOfImages;
private int physicalHeightDpi;
private int physicalWidthDpi;
private int bitBuf;
private int bitPos;
private void addComment(String s) {
if (comments == null) {
comments = new Vector();
}
comments.addElement(s);
}
/**
* Call this method after you have provided an input stream or file
* using {@link #setInput(InputStream)} or {@link #setInput(DataInput)}.
* If true is returned, the file format was known and you information
* about its content can be retrieved using the various getXyz methods.
* @return if information could be retrieved from input
*/
public boolean check() {
format = -1;
width = -1;
height = -1;
bitsPerPixel = -1;
numberOfImages = 1;
physicalHeightDpi = -1;
physicalWidthDpi = -1;
comments = null;
try {
int b1 = read() & 0xff;
int b2 = read() & 0xff;
if (b1 == 0x47 && b2 == 0x49) {
return checkGif();
}
else
if (b1 == 0x89 && b2 == 0x50) {
return checkPng();
}
else
if (b1 == 0xff && b2 == 0xd8) {
return checkJpeg();
}
else
if (b1 == 0x42 && b2 == 0x4d) {
return checkBmp();
}
else
if (b1 == 0x0a && b2 < 0x06) {
return checkPcx();
}
else
if (b1 == 0x46 && b2 == 0x4f) {
return checkIff();
}
else
if (b1 == 0x59 && b2 == 0xa6) {
return checkRas();
}
else
if (b1 == 0x50 && b2 >= 0x31 && b2 <= 0x36) {
return checkPnm(b2 - '0');
}
else
if (b1 == 0x38 && b2 == 0x42) {
return checkPsd();
}
else
if (b1 == 0x46 && b2 == 0x57) {
return checkSwf();
}
else {
return false;
}
} catch (IOException ioe) {
return false;
}
}
private boolean checkBmp() throws IOException {
byte[] a = new byte[44];
if (read(a) != a.length) {
return false;
}
width = getIntLittleEndian(a, 16);
height = getIntLittleEndian(a, 20);
if (width < 1 || height < 1) {
return false;
}
bitsPerPixel = getShortLittleEndian(a, 26);
if (bitsPerPixel != 1 && bitsPerPixel != 4 &&
bitsPerPixel != 8 && bitsPerPixel != 16 &&
bitsPerPixel != 24 && bitsPerPixel != 32) {
return false;
}
int x = getIntLittleEndian(a, 36);
if (x > 0) {
setPhysicalWidthDpi(x);
}
int y = getIntLittleEndian(a, 40);
if (y > 0) {
setPhysicalHeightDpi(y);
}
format = FORMAT_BMP;
return true;
}
private boolean checkGif() throws IOException {
final byte[] GIF_MAGIC_87A = {0x46, 0x38, 0x37, 0x61};
final byte[] GIF_MAGIC_89A = {0x46, 0x38, 0x39, 0x61};
byte[] a = new byte[11]; // 4 from the GIF signature + 7 from the global header
if (read(a) != 11) {
return false;
}
if ((!equals(a, 0, GIF_MAGIC_89A, 0, 4)) &&
(!equals(a, 0, GIF_MAGIC_87A, 0, 4))) {
return false;
}
format = FORMAT_GIF;
width = getShortLittleEndian(a, 4);
height = getShortLittleEndian(a, 6);
int flags = a[8] & 0xff;
bitsPerPixel = ((flags >> 4) & 0x07) + 1;
if (!determineNumberOfImages) {
return true;
}
// skip global color palette
if ((flags & 0x80) != 0) {
int tableSize = (1 << ((flags & 7) + 1)) * 3;
skip(tableSize);
}
numberOfImages = 0;
int blockType;
do
{
blockType = read();
switch(blockType)
{
case(0x2c): // image separator
{
if (read(a, 0, 9) != 9) {
return false;
}
flags = a[8] & 0xff;
int localBitsPerPixel = (flags & 0x07) + 1;
if (localBitsPerPixel > bitsPerPixel) {
bitsPerPixel = localBitsPerPixel;
}
if ((flags & 0x80) != 0) {
skip((1 << localBitsPerPixel) * 3);
}
skip(1); // initial code length
int n;
do
{
n = read();
if (n > 0) {
skip(n);
}
else
if (n == -1) {
return false;
}
}
while (n > 0);
numberOfImages++;
break;
}
case(0x21): // extension
{
int extensionType = read();
if (collectComments && extensionType == 0xfe) {
StringBuffer sb = new StringBuffer();
int n;
do
{
n = read();
if (n == -1) {
return false;
}
if (n > 0) {
for (int i = 0; i < n; i++) {
int ch = read();
if (ch == -1) {
return false;
}
sb.append((char)ch);
}
}
}
while (n > 0);
} else {
int n;
do
{
n = read();
if (n > 0) {
skip(n);
}
else
if (n == -1) {
return false;
}
}
while (n > 0);
}
break;
}
case(0x3b): // end of file
{
break;
}
default:
{
return false;
}
}
}
while (blockType != 0x3b);
return true;
}
private boolean checkIff() throws IOException {
byte[] a = new byte[10];
// read remaining 2 bytes of file id, 4 bytes file size
// and 4 bytes IFF subformat
if (read(a, 0, 10) != 10) {
return false;
}
final byte[] IFF_RM = {0x52, 0x4d};
if (!equals(a, 0, IFF_RM, 0, 2)) {
return false;
}
int type = getIntBigEndian(a, 6);
if (type != 0x494c424d && // type must be ILBM...
type != 0x50424d20) { // ...or PBM
return false;
}
// loop chunks to find BMHD chunk
do {
if (read(a, 0, 8) != 8) {
return false;
}
int chunkId = getIntBigEndian(a, 0);
int size = getIntBigEndian(a, 4);
if ((size & 1) == 1) {
size++;
}
if (chunkId == 0x424d4844) { // BMHD chunk
if (read(a, 0, 9) != 9) {
return false;
}
format = FORMAT_IFF;
width = getShortBigEndian(a, 0);
height = getShortBigEndian(a, 2);
bitsPerPixel = a[8] & 0xff;
return (width > 0 && height > 0 && bitsPerPixel > 0 && bitsPerPixel < 33);
} else {
skip(size);
}
} while (true);
}
private boolean checkJpeg() throws IOException {
byte[] data = new byte[12];
while (true) {
if (read(data, 0, 4) != 4) {
return false;
}
int marker = getShortBigEndian(data, 0);
int size = getShortBigEndian(data, 2);
if ((marker & 0xff00) != 0xff00) {
return false; // not a valid marker
}
if (marker == 0xffe0) { // APPx
if (size < 14) {
return false; // APPx header must be larger than 14 bytes
}
if (read(data, 0, 12) != 12) {
return false;
}
final byte[] APP0_ID = {0x4a, 0x46, 0x49, 0x46, 0x00};
if (equals(APP0_ID, 0, data, 0, 5)) {
if (data[7] == 1) {
setPhysicalWidthDpi(getShortBigEndian(data, 8));
setPhysicalHeightDpi(getShortBigEndian(data, 10));
}
else
if (data[7] == 2) {
int x = getShortBigEndian(data, 8);
int y = getShortBigEndian(data, 10);
setPhysicalWidthDpi((int)(x * 2.54f));
setPhysicalHeightDpi((int)(y * 2.54f));
}
}
skip(size - 14);
}
else
if (collectComments && size > 2 && marker == 0xfffe) { // comment
size -= 2;
byte[] chars = new byte[size];
if (read(chars, 0, size) != size) {
return false;
}
String comment = new String(chars, "iso-8859-1");
comment = comment.trim();
System.out.println(comment);
addComment(comment);
}
else
if (marker >= 0xffc0 && marker <= 0xffcf && marker != 0xffc4 && marker != 0xffc8) {
if (read(data, 0, 6) != 6) {
return false;
}
format = FORMAT_JPEG;
bitsPerPixel = (data[0] & 0xff) * (data[5] & 0xff);
width = getShortBigEndian(data, 3);
height = getShortBigEndian(data, 1);
return true;
} else {
skip(size - 2);
}
}
}
private boolean checkPcx() throws IOException {
byte[] a = new byte[64];
if (read(a) != a.length) {
return false;
}
if (a[0] != 1) { // encoding, 1=RLE is only valid value
return false;
}
// width / height
int x1 = getShortLittleEndian(a, 2);
int y1 = getShortLittleEndian(a, 4);
int x2 = getShortLittleEndian(a, 6);
int y2 = getShortLittleEndian(a, 8);
if (x1 < 0 || x2 < x1 || y1 < 0 || y2 < y1) {
return false;
}
width = x2 - x1 + 1;
height = y2 - y1 + 1;
// color depth
int bits = a[1];
int planes = a[63];
if (planes == 1 &&
(bits == 1 || bits == 2 || bits == 4 || bits == 8)) {
// paletted
bitsPerPixel = bits;
} else
if (planes == 3 && bits == 8) {
// RGB truecolor
bitsPerPixel = 24;
} else {
return false;
}
setPhysicalWidthDpi(getShortLittleEndian(a, 10));
setPhysicalHeightDpi(getShortLittleEndian(a, 10));
format = FORMAT_PCX;
return true;
}
private boolean checkPng() throws IOException {
final byte[] PNG_MAGIC = {0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a};
byte[] a = new byte[24];
if (read(a) != 24) {
return false;
}
if (!equals(a, 0, PNG_MAGIC, 0, 6)) {
return false;
}
format = FORMAT_PNG;
width = getIntBigEndian(a, 14);
height = getIntBigEndian(a, 18);
bitsPerPixel = a[22] & 0xff;
int colorType = a[23] & 0xff;
if (colorType == 2 || colorType == 6) {
bitsPerPixel *= 3;
}
return true;
}
private boolean checkPnm(int id) throws IOException {
if (id < 1 || id > 6) {
return false;
}
final int[] PNM_FORMATS = {FORMAT_PBM, FORMAT_PGM, FORMAT_PPM};
format = PNM_FORMATS[(id - 1) % 3];
boolean hasPixelResolution = false;
String s;
while (true)
{
s = readLine();
if (s != null) {
s = s.trim();
}
if (s == null || s.length() < 1) {
continue;
}
if (s.charAt(0) == '#') { // comment
if (collectComments && s.length() > 1) {
addComment(s.substring(1));
}
continue;
}
if (!hasPixelResolution) { // split "343 966" into width=343, height=966
int spaceIndex = s.indexOf(' ');
if (spaceIndex == -1) {
return false;
}
String widthString = s.substring(0, spaceIndex);
spaceIndex = s.lastIndexOf(' ');
if (spaceIndex == -1) {
return false;
}
String heightString = s.substring(spaceIndex + 1);
try {
width = Integer.parseInt(widthString);
height = Integer.parseInt(heightString);
} catch (NumberFormatException nfe) {
return false;
}
if (width < 1 || height < 1) {
return false;
}
if (format == FORMAT_PBM) {
bitsPerPixel = 1;
return true;
}
hasPixelResolution = true;
}
else
{
int maxSample;
try {
maxSample = Integer.parseInt(s);
} catch (NumberFormatException nfe) {
return false;
}
if (maxSample < 0) {
return false;
}
for (int i = 0; i < 25; i++) {
if (maxSample < (1 << (i + 1))) {
bitsPerPixel = i + 1;
if (format == FORMAT_PPM) {
bitsPerPixel *= 3;
}
return true;
}
}
return false;
}
}
}
private boolean checkPsd() throws IOException {
byte[] a = new byte[24];
if (read(a) != a.length) {
return false;
}
final byte[] PSD_MAGIC = {0x50, 0x53};
if (!equals(a, 0, PSD_MAGIC, 0, 2)) {
return false;
}
format = FORMAT_PSD;
width = getIntBigEndian(a, 16);
height = getIntBigEndian(a, 12);
int channels = getShortBigEndian(a, 10);
int depth = getShortBigEndian(a, 20);
bitsPerPixel = channels * depth;
return (width > 0 && height > 0 && bitsPerPixel > 0 && bitsPerPixel <= 64);
}
private boolean checkRas() throws IOException {
byte[] a = new byte[14];
if (read(a) != a.length) {
return false;
}
final byte[] RAS_MAGIC = {0x6a, (byte)0x95};
if (!equals(a, 0, RAS_MAGIC, 0, 2)) {
return false;
}
format = FORMAT_RAS;
width = getIntBigEndian(a, 2);
height = getIntBigEndian(a, 6);
bitsPerPixel = getIntBigEndian(a, 10);
return (width > 0 && height > 0 && bitsPerPixel > 0 && bitsPerPixel <= 24);
}
// Written by Michael Aird.
private boolean checkSwf() throws IOException {
//get rid of the last byte of the signature, the byte of the version and 4 bytes of the size
byte[] a = new byte[6];
if (read(a) != a.length) {
return false;
}
format = FORMAT_SWF;
int bitSize = (int)readUBits( 5 );
int minX = (int)readSBits( bitSize );
int maxX = (int)readSBits( bitSize );
int minY = (int)readSBits( bitSize );
int maxY = (int)readSBits( bitSize );
width = maxX/20; //cause we're in twips
height = maxY/20; //cause we're in twips
setPhysicalWidthDpi(72);
setPhysicalHeightDpi(72);
return (width > 0 && height > 0);
}
/**
* Run over String list, return false iff at least one of the arguments
* equals <code>-c</code>.
*/
private static boolean determineVerbosity(String[] args) {
if (args != null && args.length > 0) {
for (int i = 0; i < args.length; i++) {
if ("-c".equals(args[i])) {
return false;
}
}
}
return true;
}
private boolean equals(byte[] a1, int offs1, byte[] a2, int offs2, int num) {
while (num-- > 0) {
if (a1[offs1++] != a2[offs2++]) {
return false;
}
}
return true;
}
/**
* If {@link #check()} was successful, returns the image's number of bits per pixel.
* Does not include transparency information like the alpha channel.
* @return number of bits per image pixel
*/
public int getBitsPerPixel() {
return bitsPerPixel;
}
/**
* Returns the index'th comment retrieved from the image.
* @throws IllegalArgumentException if index is smaller than 0 or larger than or equal
* to the number of comments retrieved
* @see #getNumberOfComments
*/
public String getComment(int index) {
if (comments == null || index < 0 || index >= comments.size()) {
throw new IllegalArgumentException("Not a valid comment index: " + index);
}
return (String)comments.elementAt(index);
}
/**
* If {@link #check()} was successful, returns the image format as one
* of the FORMAT_xyz constants from this class.
* Use {@link #getFormatName()} to get a textual description of the file format.
* @return file format as a FORMAT_xyz constant
*/
public int getFormat() {
return format;
}
/**
* If {@link #check()} was successful, returns the image format's name.
* Use {@link #getFormat()} to get a unique number.
* @return file format name
*/
public String getFormatName() {
if (format >= 0 && format < FORMAT_NAMES.length) {
return FORMAT_NAMES[format];
} else {
return "?";
}
}
/**
* If {@link #check()} was successful, returns one the image's vertical
* resolution in pixels.
* @return image height in pixels
*/
public int getHeight() {
return height;
}
private int getIntBigEndian(byte[] a, int offs) {
return
(a[offs] & 0xff) << 24 |
(a[offs + 1] & 0xff) << 16 |
(a[offs + 2] & 0xff) << 8 |
a[offs + 3] & 0xff;
}
private int getIntLittleEndian(byte[] a, int offs) {
return
(a[offs + 3] & 0xff) << 24 |
(a[offs + 2] & 0xff) << 16 |
(a[offs + 1] & 0xff) << 8 |
a[offs] & 0xff;
}
/**
* If {@link #check()} was successful, returns a String with the
* MIME type of the format.
* @return MIME type, e.g. <code>image/jpeg</code>
*/
public String getMimeType() {
if (format >= 0 && format < MIME_TYPE_STRINGS.length) {
return MIME_TYPE_STRINGS[format];
} else {
return null;
}
}
/**
* If {@link #check()} was successful and {@link #setCollectComments(boolean)} was called with
* <code>true</code> as argument, returns the number of comments retrieved
* from the input image stream / file.
* Any number >= 0 and smaller than this number of comments is then a
* valid argument for the {@link #getComment(int)} method.
* @return number of comments retrieved from input image
*/
public int getNumberOfComments()
{
if (comments == null) {
return 0;
} else {
return comments.size();
}
}
/**
* Returns the number of images in the examined file.
* Assumes that <code>setDetermineImageNumber(true);</code> was called before
* a successful call to {@link #check()}.
* This value can currently be only different from <code>1</code> for GIF images.
* @return number of images in file
*/
public int getNumberOfImages()
{
return numberOfImages;
}
/**
* Returns the physical height of this image in dots per inch (dpi).
* Assumes that {@link #check()} was successful.
* Returns <code>-1</code> on failure.
* @return physical height (in dpi)
* @see #getPhysicalWidthDpi()
* @see #getPhysicalHeightInch()
*/
public int getPhysicalHeightDpi() {
return physicalHeightDpi;
}
/**
* If {@link #check()} was successful, returns the physical width of this image in dpi (dots per inch)
* or -1 if no value could be found.
* @return physical height (in dpi)
* @see #getPhysicalHeightDpi()
* @see #getPhysicalWidthDpi()
* @see #getPhysicalWidthInch()
*/
public float getPhysicalHeightInch() {
int h = getHeight();
int ph = getPhysicalHeightDpi();
if (h > 0 && ph > 0) {
return ((float)h) / ((float)ph);
} else {
return -1.0f;
}
}
/**
* If {@link #check()} was successful, returns the physical width of this image in dpi (dots per inch)
* or -1 if no value could be found.
* @return physical width (in dpi)
* @see #getPhysicalHeightDpi()
* @see #getPhysicalWidthInch()
* @see #getPhysicalHeightInch()
*/
public int getPhysicalWidthDpi() {
return physicalWidthDpi;
}
/**
* Returns the physical width of an image in inches, or
* <code>-1.0f</code> if width information is not available.
* Assumes that {@link #check} has been called successfully.
* @return physical width in inches or <code>-1.0f</code> on failure
* @see #getPhysicalWidthDpi
* @see #getPhysicalHeightInch
*/
public float getPhysicalWidthInch() {
int w = getWidth();
int pw = getPhysicalWidthDpi();
if (w > 0 && pw > 0) {
return ((float)w) / ((float)pw);
} else {
return -1.0f;
}
}
private int getShortBigEndian(byte[] a, int offs) {
return
(a[offs] & 0xff) << 8 |
(a[offs + 1] & 0xff);
}
private int getShortLittleEndian(byte[] a, int offs) {
return (a[offs] & 0xff) | (a[offs + 1] & 0xff) << 8;
}
/**
* If {@link #check()} was successful, returns one the image's horizontal
* resolution in pixels.
* @return image width in pixels
*/
public int getWidth() {
return width;
}
/**
* To use this class as a command line application, give it either
* some file names as parameters (information on them will be
* printed to standard output, one line per file) or call
* it with no parameters. It will then check data given to it
* via standard input.
* @param args the program arguments which must be file names
*/
public static void main(String[] args) {
imageInfo ImageInfo = new imageInfo();
boolean verbose = determineVerbosity(args);
if (args.length == 0) {
run(null, System.in, ImageInfo, verbose);
} else {
int index = 0;
while (index < args.length) {
FileInputStream in = null;
try {
String filename = args[index++];
System.out.print(filename + ";");
in = new FileInputStream(filename);
run(filename, in, ImageInfo, verbose);
in.close();
} catch (Exception e) {
System.out.println(e);
try {
in.close();
} catch (Exception ee) {
}
}
}
}
}
private static void print(String sourceName, imageInfo ii, boolean verbose) {
if (verbose) {
printVerbose(sourceName, ii);
} else {
printCompact(sourceName, ii);
}
}
private static void printCompact(String sourceName, imageInfo ImageInfo) {
System.out.println(
ImageInfo.getFormatName() + ";" +
ImageInfo.getMimeType() + ";" +
ImageInfo.getWidth() + ";" +
ImageInfo.getHeight() + ";" +
ImageInfo.getBitsPerPixel() + ";" +
ImageInfo.getNumberOfImages() + ";" +
ImageInfo.getPhysicalWidthDpi() + ";" +
ImageInfo.getPhysicalHeightDpi() + ";" +
ImageInfo.getPhysicalWidthInch() + ";" +
ImageInfo.getPhysicalHeightInch()
);
}
private static void printLine(int indentLevels, String text, float value, float minValidValue) {
if (value < minValidValue) {
return;
}
printLine(indentLevels, text, Float.toString(value));
}
private static void printLine(int indentLevels, String text, int value, int minValidValue) {
if (value >= minValidValue) {
printLine(indentLevels, text, Integer.toString(value));
}
}
private static void printLine(int indentLevels, String text, String value) {
if (value == null || value.length() == 0) {
return;
}
while (indentLevels-- > 0) {
System.out.print("\t");
}
if (text != null && text.length() > 0) {
System.out.print(text);
System.out.print(" ");
}
System.out.println(value);
}
private static void printVerbose(String sourceName, imageInfo ii) {
printLine(0, null, sourceName);
printLine(1, "File format: ", ii.getFormatName());
printLine(1, "MIME type: ", ii.getMimeType());
printLine(1, "Width (pixels): ", ii.getWidth(), 1);
printLine(1, "Height (pixels): ", ii.getHeight(), 1);
printLine(1, "Bits per pixel: ", ii.getBitsPerPixel(), 1);
printLine(1, "Number of images: ", ii.getNumberOfImages(), 1);
printLine(1, "Physical width (dpi): ", ii.getPhysicalWidthDpi(), 1);
printLine(1, "Physical height (dpi): ", ii.getPhysicalHeightDpi(), 1);
printLine(1, "Physical width (inches): ", ii.getPhysicalWidthInch(), 1.0f);
printLine(1, "Physical height (inches): ", ii.getPhysicalHeightInch(), 1.0f);
int numComments = ii.getNumberOfComments();
printLine(1, "Number of textual comments: ", numComments, 1);
if (numComments > 0) {
for (int i = 0; i < numComments; i++) {
printLine(2, null, ii.getComment(i));
}
}
}
private int read() throws IOException {
if (in != null) {
return in.read();
} else {
return din.readByte();
}
}
private int read(byte[] a) throws IOException {
if (in != null) {
return in.read(a);
} else {
din.readFully(a);
return a.length;
}
}
private int read(byte[] a, int offset, int num) throws IOException {
if (in != null) {
return in.read(a, offset, num);
} else {
din.readFully(a, offset, num);
return num;
}
}
private String readLine() throws IOException {
return readLine(new StringBuffer());
}
private String readLine(StringBuffer sb) throws IOException {
boolean finished;
do {
int value = read();
finished = (value == -1 || value == 10);
if (!finished) {
sb.append((char)value);
}
} while (!finished);
return sb.toString();
}
/**
* Read an unsigned value from the given number of bits
*/
public long readUBits( int numBits ) throws IOException
{
if (numBits == 0) {
return 0;
}
int bitsLeft = numBits;
long result = 0;
if (bitPos == 0) { //no value in the buffer - read a byte
if (in != null) {
bitBuf = in.read();
} else {
bitBuf = din.readByte();
}
bitPos = 8;
}
while( true )
{
int shift = bitsLeft - bitPos;
if( shift > 0 )
{
// Consume the entire buffer
result |= bitBuf << shift;
bitsLeft -= bitPos;
// Get the next byte from the input stream
if (in != null) {
bitBuf = in.read();
} else {
bitBuf = din.readByte();
}
bitPos = 8;
}
else
{
// Consume a portion of the buffer
result |= bitBuf >> -shift;
bitPos -= bitsLeft;
bitBuf &= 0xff >> (8 - bitPos);// mask off the consumed bits
return result;
}
}
}
/**
* Read a signed value from the given number of bits
*/
private int readSBits( int numBits ) throws IOException
{
// Get the number as an unsigned value.
long uBits = readUBits( numBits );
// Is the number negative?
if( ( uBits & (1L << (numBits - 1))) != 0 )
{
// Yes. Extend the sign.
uBits |= -1L << numBits;
}
return (int)uBits;
}
/**
* Reset the bit buffer
*/
public void synchBits()
{
bitBuf = 0;
bitPos = 0;
}
private String readLine(int firstChar) throws IOException {
StringBuffer result = new StringBuffer();
result.append((char)firstChar);
return readLine(result);
}
private static void run(String sourceName, InputStream in, imageInfo ImageInfo, boolean verbose) {
ImageInfo.setInput(in);
ImageInfo.setDetermineImageNumber(true);
ImageInfo.setCollectComments(verbose);
if (ImageInfo.check()) {
print(sourceName, ImageInfo, verbose);
}
}
/**
* Specify whether textual comments are supposed to be extracted from input.
* Default is <code>false</code>.
* If enabled, comments will be added to an internal list.
* @param newValue if <code>true</code>, this class will read comments
* @see #getNumberOfComments
* @see #getComment
*/
public void setCollectComments(boolean newValue)
{
collectComments = newValue;
}
/**
* Specify whether the number of images in a file is to be
* determined - default is <code>false</code>.
* This is a special option because some file formats require running over
* the entire file to find out the number of images, a rather time-consuming
* task.
* Not all file formats support more than one image.
* If this method is called with <code>true</code> as argument,
* the actual number of images can be queried via
* {@link #getNumberOfImages()} after a successful call to
* {@link #check()}.
* @param newValue will the number of images be determined?
* @see #getNumberOfImages
*/
public void setDetermineImageNumber(boolean newValue)
{
determineNumberOfImages = newValue;
}
/**
* Set the input stream to the argument stream (or file).
* Note that {@link java.io.RandomAccessFile} implements
* {@link java.io.DataInput}.
* @param dataInput the input stream to read from
*/
public void setInput(DataInput dataInput) {
din = dataInput;
in = null;
}
/**
* Set the input stream to the argument stream (or file).
* @param inputStream the input stream to read from
*/
public void setInput(InputStream inputStream) {
in = inputStream;
din = null;
}
private void setPhysicalHeightDpi(int newValue) {
physicalWidthDpi = newValue;
}
private void setPhysicalWidthDpi(int newValue) {
physicalHeightDpi = newValue;
}
private void skip(int num) throws IOException {
if (in != null) {
in.skip(num);
} else {
din.skipBytes(num);
}
}
}

20 years ago

JSP

Database connectivity from JSP to SQL Server

download sqlserver jdbc driver from micrsoft.
use thise code to connect:
replace the respective variables.

20 years ago

JDBC and Relational Databases

How to : Internationalization in Struts

one possibility is to use applicationresources. like this:
struts finds the client language from the request and calls the specific applicationresource file automatically.
suppose the name of your application resource file is
ApplicationResources.properties => this file is used for default language/English
now if oyu want to add support German language the create a new resource file with same name .. but add _de at the end like this:
ApplicationResources_de.properties => now when struts finds an german request then it will load the resources from ApplicationResources_de.properties file.

===========
using resources:
resources can be used by bean:message tag like :
<bean:message key="title.login"/>
entries in respectives files looks like =>
default:
title.login=New Admin console
_de:
title.login=Admin Konsole

20 years ago

Struts

How to : Internationalization in Struts

20 years ago

Struts

Logging off user (Struts)

Originally posted by Zak Nixon:
After logging the user out, can I send the browser to another URL like
http://www.google.com or something to that nature, but not another page within the application....

Thanks

Zak[/QB]

You can do that like this in action code and struts-config

Action code:

struts-config:
remember to set the redirect="true"

20 years ago

Struts

Calling action without form (Struts)

Originally posted by Zak Nixon:
I do the following:
<logic:notPresent name="user" scope="session"> <% System.out.println("NOT LOGGED IN..."); %> <%-- response.sendRedirect("/emp/login.jsp");--%> </logic:notPresent>

But using the response.sendRedirect(..), seems not to work.

Is there any other way to accomplish that?
Zak[/QB]

it can be done like this:
declare a global forward like this in struts config;

<global-forwards>
<forward name="login" path="/Login.do"/>

Login.do has an entry under action mappings
<action-mappings>
<action path="/Login" forward="/admin/login.jsp" type="org.apache.struts.actions.ForwardAction"/>

you may declare actions mappings to suit your needs.

20 years ago

Struts

Retrieving Server Path Programmatically

it is simple ..
use
getServletContext().getRealPath("/") ;

22 years ago

Servlets

JDBC AND STORING IMAGES/AUDIO/VIEDEO FILES

use blob fields to store binary data.
i am pasting some code. hope u can figure out hot to to the things..

public void LobData(String blobnr,String filename , String strUsername, String strPassword, String strDatabase,OutputStream out) throws Exception
{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc :-o racle:thin:@"+strDatabase, strUsername,strPassword);
conn.setAutoCommit (false);
Statement stmt = conn.createStatement ();
// Select the lobs
ResultSet rset = stmt.executeQuery ("select inhalt from blobdata where blob_nr="+blobnr);
//ResultSet rset = stmt.executeQuery ("select inhalt from blobdata where blob_nr=415");
while (rset.next ())
{
BLOB blob = ((OracleResultSet)rset).getBLOB (1);
dumpBlob (conn, blob,filename,out);
}
rset.close();
stmt.close();
conn.close();
}
///
public void dumpBlob (Connection conn, BLOB blob,String filename,OutputStream out)
throws Exception
{
InputStream instream = blob.getBinaryStream();
byte[] buffer = new byte[10];
int length = 0;
while ((length = instream.read(buffer)) != -1)
{
//System.out.print("Read " + length + " bytes: ");
//FileOutputStream fileOut = new FileOutputStream("U:\\tempdocs\\"+filename,true);
//fileOut.write(buffer, 0, 10);
out.write(buffer, 0, 10);
//for (int i=0; i<length; i++)
//System.out.print(buffer[i]+" ");
//System.out.println();
}
instream.close();
}

22 years ago

JDBC and Relational Databases

Mapping Java Date to an Oracle Date.

for converting to sql.Date type

22 years ago

JDBC and Relational Databases

.jsp file to .pdf file

look at xml.apache.org
in FOP project
[ October 30, 2002: Message edited by: prabhat kumar ]

22 years ago

JSP

Help needed- Options for increasing performance

one more thing can also be done is to use page cachinng mechanism.

22 years ago

Servlets

Not able to persist the absolute path of selected file in file upload control.

it is not possible to give any predefined value to "input type=file" for security reasons. as you do not have any rights on client machine.
if you want.. then use activex controls, this is the only way.

22 years ago

JSP