private void jButton3ActionPerformed(
final ActionEvent evt) { // GEN-FIRST:event_jButton3ActionPerformed
try {
BufferedImage image = (BufferedImage) guiMap2D.getCanvas().getSnapShot();
Object output0 = new File("temp0.png");
Object output1 = new File("temp1.png");
final Iterator<ImageWriter> writers = ImageIO.getImageWritersByMIMEType("image/png");
while (writers.hasNext()) {
final ImageWriter writer = writers.next();
final ImageWriterSpi spi = writer.getOriginatingProvider();
if (spi.canEncodeImage(image)) {
ImageOutputStream stream = null;
if (!isValidType(spi.getOutputTypes(), output0)) {
stream = ImageIO.createImageOutputStream(output0);
output0 = stream;
stream = ImageIO.createImageOutputStream(output1);
output1 = stream;
}
ImageWriteParam iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(0);
IIOImage iimage = new IIOImage(image, null, null);
writer.setOutput(output0);
writer.write(null, iimage, iwp);
writer.dispose();
iwp = writer.getDefaultWriteParam();
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(1);
iimage = new IIOImage(image, null, null);
writer.setOutput(output1);
writer.write(null, iimage, iwp);
writer.dispose();
if (output0 != null) {
((ImageOutputStream) output0).close();
((ImageOutputStream) output1).close();
}
return;
}
}
} catch (Exception rx) {
rx.printStackTrace();
}
} // GEN-LAST:event_jButton3ActionPerformed
@Test
public void lossyWrite() throws Exception {
File f = File.createTempFile("test-jpeg2000-lossy", ".jp2");
f.deleteOnExit();
Iterator<ImageWriter> writers = ImageIO.getImageWritersBySuffix("jp2");
assertTrue(writers.hasNext());
ImageWriter writer = writers.next();
J2KImageWriteParam writeParams = (J2KImageWriteParam) writer.getDefaultWriteParam();
writeParams.setLossless(false);
writeParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
writeParams.setCompressionType("JPEG2000");
// writeParams.setFilter(J2KImageWriteParam.FILTER_97);
writeParams.setCompressionQuality(0.0f);
writeParams.setEncodingRate(0.5f);
ImageOutputStream ios = ImageIO.createImageOutputStream(f);
writer.setOutput(ios);
writer.write(null, new IIOImage(image, null, null), writeParams);
writer.dispose();
ios.close();
assertTrue("Expected file size < 1MB", f.length() < 128 * 1024);
// System.out.println(f.length());
BufferedImage read = ImageIO.read(f);
assertEquals(SIZE, read.getWidth());
}
/**
* Compress and save an image to the disk. Currently this method only supports JPEG images.
*
* @param image The image to save
* @param toFileName The filename to use
* @param type The image type. Use <code>ImageUtils.IMAGE_JPEG</code> to save as JPEG images, or
* <code>ImageUtils.IMAGE_PNG</code> to save as PNG.
*/
public static void saveCompressedImage(BufferedImage image, String toFileName, int type) {
try {
if (type == IMAGE_PNG) {
throw new UnsupportedOperationException("PNG compression not implemented");
}
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
ImageWriter writer;
writer = (ImageWriter) iter.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(new File(toFileName));
writer.setOutput(ios);
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(0.7F);
writer.write(null, new IIOImage(image, null, null), iwparam);
ios.flush();
writer.dispose();
ios.close();
} catch (IOException e) {
throw new ForumException(e);
}
}
/**
* 图片文件转换为tif格式
*
* @param imageFile 文件路径
* @param imageFormat 文件扩展名
* @return
*/
public static File createImage(File imageFile, String imageFormat) {
File tempFile = null;
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
ImageReader reader = readers.next();
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
// Read the stream metadata
IIOMetadata streamMetadata = reader.getStreamMetadata();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.CHINESE);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("tiff");
ImageWriter writer = writers.next();
BufferedImage bi = reader.read(0);
IIOImage image = new IIOImage(bi, null, reader.getImageMetadata(0));
tempFile = tempImageFile(imageFile);
ImageOutputStream ios = ImageIO.createImageOutputStream(tempFile);
writer.setOutput(ios);
writer.write(streamMetadata, image, tiffWriteParam);
ios.close();
writer.dispose();
reader.dispose();
} catch (IOException e) {
e.printStackTrace();
}
return tempFile;
}
@Override
public void writeImage(RenderedImage image, String mimeType, float quality, OutputStream out)
throws IOException {
if ("image/jpeg".equals(mimeType)) {
// Find a JPEG writer.
ImageWriter writer = null;
Iterator<ImageWriter> iter = ImageIO.getImageWritersByMIMEType(mimeType);
if (iter.hasNext()) {
writer = iter.next();
}
JPEGImageWriteParam iwp = new JPEGImageWriteParam(null);
iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwp.setCompressionQuality(quality);
// Prepare output file.
ImageOutputStream ios = ImageIO.createImageOutputStream(out);
writer.setOutput(ios);
// Write the image.
writer.write(null, new IIOImage(image, null, null), iwp);
// Cleanup.
ios.flush();
writer.dispose();
ios.close();
} else {
ImageIO.write(image, "png", out);
}
}
/**
* Salva BufferedImage no arquivo informado na prop<br>
*
* <p><b>Exemplo:><br>
* <code>salvarImagem(img)</code>
*
* @param img BufferedImage a ser salva
* @author roberto
*/
private void salvarImagem(BufferedImage img) {
ImageWriter writer = null;
Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName(formatoImagem);
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
ImageOutputStream ios;
try {
ios = ImageIO.createImageOutputStream(new File(prop.getProp("dirImg")));
writer.setOutput(ios);
ImageWriteParam param = new JPEGImageWriteParam(java.util.Locale.getDefault());
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(1);
writer.write(null, new IIOImage(img, null, null), param);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Gets pixel data of an <code>IIOImage</code> object.
*
* @param image an <code>IIOImage</code> object
* @return a byte buffer of pixel data
* @throws Exception
*/
public static ByteBuffer getImageByteBuffer(IIOImage image) throws IOException {
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
writer.setOutput(ios);
writer.write(
streamMetadata, new IIOImage(image.getRenderedImage(), null, null), tiffWriteParam);
// writer.write(image.getRenderedImage());
writer.dispose();
// ImageIO.write(image.getRenderedImage(), "tiff", ios); // this can be used in lieu of
// writer
ios.seek(0);
BufferedImage bi = ImageIO.read(ios);
return convertImageData(bi);
}
/**
* Gets pixel data of an <code>IIOImage</code> object.
*
* @param oimage an <code>IIOImage</code> object
* @return a byte buffer of pixel data
* @throws Exception
*/
public static ByteBuffer getImageByteBuffer(BufferedImage oimage) throws IOException {
// Get tif writer and set output to file
ImageWriter writer = new TIFFImageWriterSpi().createWriterInstance();
// Set up the writeParam
// We are using the old JAI ImageIO plugin, because for some reason, OCR don't work with
// TwelveMonkeys' plugin
ImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
ImageOutputStream ios = ImageIO.createImageOutputStream(outputStream);
writer.setOutput(ios);
writer.write(streamMetadata, new IIOImage(oimage, null, null), tiffWriteParam);
writer.dispose();
// Read the writed image
ios.seek(0);
ImageReader reader = new TIFFImageReaderSpi().createReaderInstance();
ImageReadParam param = reader.getDefaultReadParam();
reader.setInput(ios, true, true);
BufferedImage bi;
try {
bi = reader.read(0, param);
} finally {
reader.dispose();
ios.close();
}
return convertImageData(bi);
}
@SuppressWarnings("unchecked")
public void write() throws IOException {
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(EXTENSION);
ImageWriter writer = writers.next();
ImageWriteParam param = writer.getDefaultWriteParam();
IIOMetadata metadata = writer.getDefaultImageMetadata(new ImageTypeSpecifier(image), param);
if (metadata instanceof com.sun.imageio.plugins.png.PNGMetadata) {
com.sun.imageio.plugins.png.PNGMetadata pngMetadata =
(com.sun.imageio.plugins.png.PNGMetadata) metadata;
ArrayList keyword = pngMetadata.tEXt_keyword;
ArrayList text = pngMetadata.tEXt_text;
for (String key : this.metadata.keySet()) {
if (keyword == null) keyword = new ArrayList();
if (text == null) text = new ArrayList();
keyword.add(key);
text.add(this.metadata.get(key));
}
pngMetadata.tEXt_keyword = keyword;
pngMetadata.tEXt_text = text;
}
IIOImage iioi = new IIOImage(image, null, metadata);
ImageOutputStream ios = ImageIO.createImageOutputStream(file);
writer.setOutput(ios);
writer.write(iioi);
}
/**
* store BufferedImage to file
*
* @param image BufferedImage
* @param outputFile output image file
* @param quality quality of output image
* @return true success, else fail
*/
public static boolean storeImage(BufferedImage image, File outputFile, float quality) {
try {
// reconstruct folder structure for image file output
if (outputFile.getParentFile() != null && !outputFile.getParentFile().exists()) {
outputFile.getParentFile().mkdirs();
}
if (outputFile.exists()) {
outputFile.delete();
}
// get image file suffix
String extName = "gif";
// get registry ImageWriter for specified image suffix
Iterator writers = ImageIO.getImageWritersByFormatName(extName);
ImageWriter imageWriter = (ImageWriter) writers.next();
// set image output params
ImageWriteParam params = new JPEGImageWriteParam(null);
params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
params.setCompressionQuality(quality);
params.setProgressiveMode(javax.imageio.ImageWriteParam.MODE_DISABLED);
params.setDestinationType(
new ImageTypeSpecifier(
IndexColorModel.getRGBdefault(),
IndexColorModel.getRGBdefault().createCompatibleSampleModel(16, 16)));
// writer image to file
ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(outputFile);
imageWriter.setOutput(imageOutputStream);
imageWriter.write(null, new IIOImage(image, null, null), params);
imageOutputStream.close();
imageWriter.dispose();
return true;
} catch (Exception e) {
e.printStackTrace();
}
return false;
}
/**
* Creates an image file of the specified format.
*
* @param file The file where to write the image.
* @param format One of the follow types: jpeg, png.
* @throws Exception Thrown if an error occurred while encoding the image.
*/
public void createImageFile(File file, String format) throws Exception {
Iterator writers = ImageIO.getImageWritersByFormatName(format);
ImageWriter writer = (ImageWriter) writers.next();
ImageOutputStream ios = ImageIO.createImageOutputStream(file);
writer.setOutput(ios);
writer.write(new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB));
ios.close();
}
/**
* 生成随机默认头像，如果存在原图，则查询各个尺寸头像，对不存在的头像重新用原图生成
*
* @param userId
* @param userName
* @return
*/
public void avatarGenerate(String userId, String userName) {
// 获取缩略名字
userName = DefaultAvatarGeneratorService.obatainName(userName);
// 判断是否有初始头像，如果有用初始头像切割小头像，然后组装
// 如果没有则随机选择一个初始头像，添加姓名水印后切割小头像，其实是一种容错机制
GridFSDBFile intinalAvatarFile =
imageStoreService.get(AvatarIdGenerator.obtainMobileLargeAvatarId(userId));
// 要裁剪的尺寸
List<Double> thumbnailSizeList = SnapFileConfigUtils.obtainAvatarScaleSizes();
int number = 0;
BufferedImage bimage = null;
if (intinalAvatarFile == null) {
Random random = new Random();
number = random.nextInt(DefaultAvatarCacheService.DEFAULT_AVATAR_NUMBER);
number++;
bimage = DefaultAvatarCacheService.obtainCacheRandomAvatar(number);
// 如果姓名不为空，加水印随机图片
if (!StringUtils.isEmpty(userName)) {
drawName(bimage, userName);
}
} else {
try {
bimage = ImageIO.read(intinalAvatarFile.getInputStream());
thumbnailSizeList = this.obtainThumbnailSizeList(userId);
} catch (IOException e) {
e.printStackTrace();
}
}
int width = bimage.getWidth();
int height = bimage.getHeight();
ByteArrayOutputStream bs = new ByteArrayOutputStream();
ImageOutputStream imOut;
try {
imOut = ImageIO.createImageOutputStream(bs);
ImageIO.write(bimage, "png", imOut);
// 存储原图到数据库
imageService.uploadTempLogo(new ByteArrayInputStream(bs.toByteArray()), userId);
} catch (IOException e) {
Logger.error("上传随机头像出错", e);
e.printStackTrace();
}
if (!thumbnailSizeList.isEmpty()) {
// 生成切割小图片，存入数据库
imageService.rectAndStoreAvatar(
userId, 0, 0, width, height, thumbnailSizeList, AvatarIdGenerator.USER_TYPE);
}
}
/** 生成验证码 */
public void getImageCode() {
long beginRunTime = 0;
if (logger.isDebugEnabled()) {
beginRunTime = System.currentTimeMillis();
logger.debug("enter getImageCode method.");
}
int width = 70;
int height = 20;
try {
Random random = new Random();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.WHITE);
g.fillRect(0, 0, width, height);
g.setFont(new Font("Arial", Font.PLAIN, 18));
String code = RandomStringUtils.random(5, true, true);
Pattern p = Pattern.compile(pattern);
Matcher matcher = p.matcher(code);
while (matcher.find()) {
code = RandomStringUtils.random(5, true, true);
matcher = p.matcher(code);
}
if (logger.isDebugEnabled()) {
logger.debug("---code:" + code);
}
for (int i = 0; i < code.length(); i++) {
g.setColor(
new Color(
20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
g.drawString(
String.valueOf(code.charAt(i)),
(int) ((width * 0.20) * (i + 0.06)),
(int) (height * 0.8));
}
HttpServletRequest request = ServletActionContext.getRequest();
HttpServletResponse response = ServletActionContext.getResponse();
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
request.getSession().setAttribute("code", code);
g.dispose();
ServletOutputStream output = response.getOutputStream();
ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
ImageIO.write(image, "JPEG", imageOut);
imageOut.flush();
imageOut.close();
output.flush();
} catch (IOException e) {
e.printStackTrace();
}
if (logger.isDebugEnabled()) {
long takeTime = System.currentTimeMillis() - beginRunTime;
logger.debug("exit getImageCode method.takeTime:" + takeTime + "ms");
}
}
private static void write(File f, boolean raw, BufferedImage image) throws IOException {
Iterator<ImageWriter> writers = ImageIO.getImageWritersBySuffix("ppm");
assertTrue(writers.hasNext());
ImageWriter writer = writers.next();
PNMImageWriteParam params = (PNMImageWriteParam) writer.getDefaultWriteParam();
params.setRaw(raw);
ImageOutputStream ios = ImageIO.createImageOutputStream(f);
writer.setOutput(ios);
writer.write(null, new IIOImage(image, null, null), params);
writer.dispose();
ios.close();
}
/**
* Creates a list of TIFF image files from an image file. It basically converts images of other
* formats to TIFF format, or a multi-page TIFF image to multiple TIFF image files.
*
* @param imageFile input image file
* @param index an index of the page; -1 means all pages, as in a multi-page TIFF image
* @return a list of TIFF image files
* @throws Exception
*/
public static List<File> createTiffFiles(File imageFile, int index) throws IOException {
List<File> tiffFiles = new ArrayList<File>();
String imageFileName = imageFile.getName();
String imageFormat = imageFileName.substring(imageFileName.lastIndexOf('.') + 1);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(imageFormat);
ImageReader reader = readers.next();
if (reader == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
ImageInputStream iis = ImageIO.createImageInputStream(imageFile);
reader.setInput(iis);
// Read the stream metadata
// IIOMetadata streamMetadata = reader.getStreamMetadata();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
// Read the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
int imageTotal = reader.getNumImages(true);
for (int i = 0; i < imageTotal; i++) {
// all if index == -1; otherwise, only index-th
if (index == -1 || i == index) {
// BufferedImage bi = reader.read(i);
// IIOImage oimage = new IIOImage(bi, null, reader.getImageMetadata(i));
IIOImage oimage = reader.readAll(i, reader.getDefaultReadParam());
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
}
writer.dispose();
reader.dispose();
return tiffFiles;
}
private static byte[] convertChartToByteArray(
Chart chartDetails, JFreeChart chart, int width, int height)
throws IOException, IIOInvalidTreeException {
BufferedImage buffImg =
chart.createBufferedImage(
width, height, BufferedImage.BITMASK | BufferedImage.SCALE_SMOOTH, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageWriter writer = ImageIO.getImageWritersByFormatName("png").next();
ImageWriteParam writeParam = writer.getDefaultWriteParam();
ImageTypeSpecifier typeSpecifier =
ImageTypeSpecifier.createFromBufferedImageType(BufferedImage.TYPE_INT_RGB);
IIOMetadata metadata = writer.getDefaultImageMetadata(typeSpecifier, writeParam);
if (chartDetails != null) {
if (chartDetails.getId() == null) {
chartDetails.setId("%ID%");
}
IIOMetadataNode textEntry = new IIOMetadataNode("tEXtEntry");
textEntry.setAttribute("keyword", "chart-google-data");
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(bout);
objectOutputStream.writeObject(chartDetails);
objectOutputStream.flush();
textEntry.setAttribute(
"value",
(String)
ChartRendererFactory.getRendererForOutput(ChartRendererGoogleTools.TYPE)
.renderChart(chartDetails));
IIOMetadataNode text = new IIOMetadataNode("tEXt");
text.appendChild(textEntry);
IIOMetadataNode root = new IIOMetadataNode("javax_imageio_png_1.0");
root.appendChild(text);
metadata.mergeTree("javax_imageio_png_1.0", root);
}
// setDPI(metadata);
final ImageOutputStream stream = ImageIO.createImageOutputStream(baos);
try {
writer.setOutput(stream);
writer.write(metadata, new IIOImage(buffImg, null, metadata), writeParam);
} finally {
stream.close();
}
byte[] bytes = baos.toByteArray(); // ChartUtilities.encodeAsPNG(buffImg, true, 9);
return bytes;
}
/**
* @see ImageWriter#writeImage(java.awt.image.RenderedImage, java.io.OutputStream,
* ImageWriterParams)
*/
public void writeImage(RenderedImage image, OutputStream out, ImageWriterParams params)
throws IOException {
Iterator iter;
iter = ImageIO.getImageWritersByMIMEType(getMIMEType());
javax.imageio.ImageWriter iiowriter = null;
try {
iiowriter = (javax.imageio.ImageWriter) iter.next();
if (iiowriter != null) {
iiowriter.addIIOWriteWarningListener(this);
ImageOutputStream imgout = null;
try {
imgout = ImageIO.createImageOutputStream(out);
ImageWriteParam iwParam = getDefaultWriteParam(iiowriter, image, params);
ImageTypeSpecifier type;
if (iwParam.getDestinationType() != null) {
type = iwParam.getDestinationType();
} else {
type = ImageTypeSpecifier.createFromRenderedImage(image);
}
// Handle metadata
IIOMetadata meta = iiowriter.getDefaultImageMetadata(type, iwParam);
// meta might be null for some JAI codecs as they don't support metadata
if (params != null && meta != null) {
meta = updateMetadata(meta, params);
}
// Write image
iiowriter.setOutput(imgout);
IIOImage iioimg = new IIOImage(image, null, meta);
iiowriter.write(null, iioimg, iwParam);
} finally {
if (imgout != null) {
System.err.println("closing");
imgout.close();
}
}
} else {
throw new UnsupportedOperationException(
"No ImageIO codec for writing " + getMIMEType() + " is available!");
}
} finally {
if (iiowriter != null) {
System.err.println("disposing");
iiowriter.dispose();
}
}
}
public static void main(String[] args) throws IOException {
List<Color> colorlist = new ArrayList<Color>();
for (int i = 0; i < 9000; i++) {
if (new Random().nextBoolean()) colorlist.add(Color.red);
else if (i > 600) colorlist.add(Color.green);
else colorlist.add(Color.yellow);
}
int width = 600;
int height = 30;
BufferedImage image = null;
Graphics2D g2 = null;
int step = width / colorlist.size();
ByteArrayOutputStream bs = new ByteArrayOutputStream();
ImageOutputStream imOut = ImageIO.createImageOutputStream(bs);
if (step >= 1) {
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.setBackground(Color.WHITE);
for (int i = 0; i < colorlist.size(); i++) {
g2.setColor(colorlist.get(i));
g2.fillRect(i * step, 0, i * step + step, height);
}
} else {
image = new BufferedImage(colorlist.size(), height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.setBackground(Color.WHITE);
for (int i = 0; i < colorlist.size(); i++) {
g2.setColor(colorlist.get(i));
g2.drawLine(i, 0, i, height);
}
}
g2.dispose();
Image scaleImage = image.getScaledInstance(width, height, Image.SCALE_SMOOTH);
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.drawImage(scaleImage, 0, 0, null);
g2.dispose();
ImageIO.write(image, "GIF", imOut);
byte[] contentByte = bs.toByteArray();
FileOutputStream f = new FileOutputStream("d:\\test.gif");
f.write(contentByte);
f.flush();
f.close();
bs.close();
imOut.close();
}
public void compressJpegFile(
File infile, File outfile, float compressionQuality, int widthCanvas, int heightCanvas)
throws IOException {
// Retrieve jpg image to be compressed
BufferedImage rendImage = ImageIO.read(infile);
widthFile = rendImage.getWidth();
heightFile = rendImage.getHeight();
double aspectRatioCanvas = widthCanvas / heightCanvas;
double aspectRatioFile = widthFile / heightFile;
widthFile = widthCanvas;
heightFile = widthCanvas / aspectRatioFile;
if (heightFile > heightCanvas) {
heightFile = heightCanvas;
widthFile = heightCanvas * aspectRatioFile;
}
this.width = (int) widthFile;
this.height = (int) heightFile;
ImageTypeSpecifier its = ImageTypeSpecifier.createFromRenderedImage(rendImage);
BufferedImage outImage = its.createBufferedImage(width, height);
Graphics2D graphics2D = outImage.createGraphics();
graphics2D.setRenderingHint(
RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
// graphics2D.drawRenderedImage(rendImage, new AffineTransform());
graphics2D.drawImage(rendImage, 0, 0, width, height, null);
// Find a jpeg writer
ImageWriter writer = null;
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
if (iter.hasNext()) {
writer = (ImageWriter) iter.next();
}
// Prepare output file
ImageOutputStream ios = ImageIO.createImageOutputStream(outfile);
writer.setOutput(ios);
// Set the compression quality
ImageWriteParam iwparam = new JPEGImageWriteParam(Locale.getDefault());
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setCompressionQuality(compressionQuality);
// Write the image
writer.write(null, new IIOImage(outImage, null, null), iwparam);
// infile.delete();
// Cleanup
ios.flush();
writer.dispose();
ios.close();
// return
}
private static byte[] toPng(BufferedImage bufferedImage) throws IOException {
ImageWriter imageWriter = getPngImageWriter();
try {
// set quality
ImageWriteParam imageWriteParam = imageWriter.getDefaultWriteParam();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(byteArrayOutputStream);
imageWriter.setOutput(imageOutputStream);
IIOImage iioImage = new IIOImage(bufferedImage, null, null);
imageWriter.write(null, iioImage, imageWriteParam);
return (byteArrayOutputStream.toByteArray());
} finally {
imageWriter.dispose();
}
}
public String execute() throws Exception {
// 在内存中创建图象
int width = 85, height = 20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
// 生成随机类
Random random = new Random();
// 设定背景色
g.setColor(getRandColor(200, 250));
g.fillRect(0, 0, width, height);
// 设定字体
g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
g.setColor(getRandColor(160, 200));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
// 取随机产生的认证码(6位数字)
String sRand = "";
for (int i = 0; i < 6; i++) {
String rand = String.valueOf(random.nextInt(10));
sRand += rand;
// 将认证码显示到图象中
g.setColor(
new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
// 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
g.drawString(rand, 13 * i + 6, 16);
}
// 将认证码存入SESSION
ActionContext.getContext().getSession().put("identifying_code", sRand);
// 图象生效
g.dispose();
ByteArrayOutputStream output = new ByteArrayOutputStream();
ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
ImageIO.write(image, "JPEG", imageOut);
imageOut.close();
ByteArrayInputStream input = new ByteArrayInputStream(output.toByteArray());
this.setInputStream(input);
return SUCCESS;
}
/**
* 生成包含logo的二维码
*
* @param content
* @param imgType
* @param size
* @param logoImage
* @return
*/
public InputStream encodeQRCodeHasLogo(
String content, String imgType, int size, LogoImage logoImage) {
InputStream is = null;
BufferedImage bufImg = this.generateQRCodeImage(content, imgType, size, logoImage);
ByteArrayOutputStream bs = new ByteArrayOutputStream();
ImageOutputStream imOut = null;
try {
imOut = ImageIO.createImageOutputStream(bs);
ImageIO.write(bufImg, imgType, imOut);
is = new ByteArrayInputStream(bs.toByteArray());
} catch (IOException e) {
e.printStackTrace();
} finally {
this.close(bs);
this.close(imOut);
}
return is;
}
public void processImage(BufferedImage image, OutputStream out) throws IOException {
if (image.getColorModel().hasAlpha()) {
// Javas JPEG writes has a bug when the image has alpha transparency
// see http://stackoverflow.com/questions/4386446/problem-using-imageio-write-jpg-file
BufferedImage imageRGB =
new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB);
Graphics2D g = imageRGB.createGraphics();
g.drawImage(image, null, 0, 0);
g.dispose();
image = imageRGB;
}
ImageOutputStream imageOut = ImageIO.createImageOutputStream(out);
jpegImageWriter.setOutput(imageOut);
IIOImage ioImage = new IIOImage(image, null, null);
jpegImageWriter.write(null, ioImage, iwp);
}
public static byte[] getImageBytes(Image image, String type) throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
BufferedImage bufImage = convertToBufferedImage(image);
ImageWriter writer = null;
Iterator i = ImageIO.getImageWritersByMIMEType(type);
if (i.hasNext()) {
writer = (ImageWriter) i.next();
}
if (writer != null) {
ImageOutputStream stream = null;
stream = ImageIO.createImageOutputStream(baos);
writer.setOutput(stream);
writer.write(bufImage);
stream.close();
return baos.toByteArray();
}
return null;
}
public static boolean compressPic(String srcFilePath, String descFilePath) {
File file = null;
BufferedImage src = null;
FileOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩，必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度，参数qality是取值0~1范围内，
imgWriteParams.setCompressionQuality((float) 0.1);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(
new javax.imageio.ImageTypeSpecifier(
colorModel, colorModel.createCompatibleSampleModel(16, 16)));
try {
if (StringUtils.isBlank(srcFilePath)) {
return false;
} else {
file = new File(srcFilePath);
src = ImageIO.read(file);
out = new FileOutputStream(descFilePath);
imgWrier.reset();
// 必须先指定 out值，才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法，就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
}
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
public static List<File> createTiffFiles(List<IIOImage> imageList, int index, int dpiX, int dpiY)
throws IOException {
List<File> tiffFiles = new ArrayList<File>();
// Set up the writeParam
TIFFImageWriteParam tiffWriteParam = new TIFFImageWriteParam(Locale.US);
tiffWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED);
// Get tif writer and set output to file
Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName(TIFF_FORMAT);
ImageWriter writer = writers.next();
if (writer == null) {
throw new RuntimeException(
"Need to install JAI Image I/O package.\nhttps://jai-imageio.dev.java.net");
}
// Get the stream metadata
IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(tiffWriteParam);
// all if index == -1; otherwise, only index-th
for (IIOImage oimage : (index == -1 ? imageList : imageList.subList(index, index + 1))) {
if (dpiX != 0 && dpiY != 0) {
// Get the default image metadata.
ImageTypeSpecifier imageType =
ImageTypeSpecifier.createFromRenderedImage(oimage.getRenderedImage());
IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);
imageMetadata = setDPIViaAPI(imageMetadata, dpiX, dpiY);
oimage.setMetadata(imageMetadata);
}
File tiffFile = File.createTempFile(OUTPUT_FILE_NAME, TIFF_EXT);
ImageOutputStream ios = ImageIO.createImageOutputStream(tiffFile);
writer.setOutput(ios);
writer.write(streamMetadata, oimage, tiffWriteParam);
ios.close();
tiffFiles.add(tiffFile);
}
writer.dispose();
return tiffFiles;
}
public byte[] generateCheckCodeImage() {
try {
Integer width = Integer.valueOf(60);
Integer height = Integer.valueOf(20);
Integer wordLength = Integer.valueOf(4);
BufferedImage image = new BufferedImage(width, height, 1);
Graphics g = image.getGraphics();
Random random = new Random(System.currentTimeMillis());
g.setColor(new Color(200, 200, 200));
g.fillRect(0, 0, width, height);
g.setFont(new Font("Times New Roman", 0, 18));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
autoGenerCheckCode = "";
for (int i = 0; i < wordLength.intValue(); i++) {
String rand = (new StringBuilder(String.valueOf(random.nextInt(10)))).toString();
autoGenerCheckCode =
(new StringBuilder(String.valueOf(autoGenerCheckCode))).append(rand).toString();
g.setColor(
new Color(
20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
g.drawString(rand, 13 * i + 4, 16);
}
g.dispose();
ByteArrayOutputStream output = new ByteArrayOutputStream();
ImageOutputStream imageOut = ImageIO.createImageOutputStream(output);
ImageIO.write(image, "JPEG", imageOut);
imageOut.close();
return output.toByteArray();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 图片截取
*
* @param file
* @param newName
* @param path
* @param x
* @param y
* @param width
* @param height
* @return author:caobo date:Oct 14, 2009 12:38:05 PM
*/
public static File cutting(
File file, String newName, String path, int x, int y, int width, int height) {
ImageOutputStream out = null;
InputStream is = null;
ImageInputStream iis = null;
try {
String endName = file.getName();
endName = endName.substring(endName.lastIndexOf(".") + 1);
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName(endName);
ImageReader reader = (ImageReader) readers.next();
is = new FileInputStream(file);
iis = ImageIO.createImageInputStream(is);
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
Rectangle rect = new Rectangle(x, y, width, height);
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
File newFile = new File(path);
if (!newFile.exists()) newFile.mkdirs();
newFile = new File(path, newName);
out = ImageIO.createImageOutputStream(new FileOutputStream(newFile));
ImageIO.write(bi, endName, out);
file = newFile;
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
iis.close();
is.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return file;
}
public InputStream getSpectrumImage(List<Color> colorlist, int width, int height)
throws IOException {
BufferedImage image = null;
Graphics2D g2 = null;
int step = width / colorlist.size();
if (step >= 1) {
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.setBackground(Color.WHITE);
for (int i = 0; i < colorlist.size(); i++) {
g2.setColor(colorlist.get(i));
g2.fillRect(i * step, 0, i * step + step, height);
}
} else {
image = new BufferedImage(colorlist.size(), height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.setBackground(Color.WHITE);
for (int i = 0; i < colorlist.size(); i++) {
g2.setColor(colorlist.get(i));
g2.drawLine(i, 0, i, height);
}
}
g2.dispose();
Image scaleImage = image.getScaledInstance(width, height, Image.SCALE_SMOOTH);
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
g2 = (Graphics2D) image.getGraphics();
g2.drawImage(scaleImage, 0, 0, null);
g2.dispose();
ByteArrayOutputStream bs = new ByteArrayOutputStream();
ImageOutputStream imOut = ImageIO.createImageOutputStream(bs);
ImageIO.write(image, "GIF", imOut);
InputStream istream = new ByteArrayInputStream(bs.toByteArray());
return istream;
}
@SuppressWarnings("unused")
private boolean saveJpeg(int[] byteArray, int width, int height, int dpi, String file) {
BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
WritableRaster wr = bufferedImage.getRaster();
wr.setPixels(0, 0, width, height, byteArray);
try {
// Image writer
JPEGImageWriter imageWriter =
(JPEGImageWriter) ImageIO.getImageWritersBySuffix("jpeg").next();
ImageOutputStream ios = ImageIO.createImageOutputStream(new File(file));
imageWriter.setOutput(ios);
// Compression
JPEGImageWriteParam jpegParams = (JPEGImageWriteParam) imageWriter.getDefaultWriteParam();
jpegParams.setCompressionMode(JPEGImageWriteParam.MODE_EXPLICIT);
jpegParams.setCompressionQuality(0.85f);
// Metadata (dpi)
IIOMetadata data =
imageWriter.getDefaultImageMetadata(new ImageTypeSpecifier(bufferedImage), jpegParams);
Element tree = (Element) data.getAsTree("javax_imageio_jpeg_image_1.0");
Element jfif = (Element) tree.getElementsByTagName("app0JFIF").item(0);
jfif.setAttribute("Xdensity", Integer.toString(dpi));
jfif.setAttribute("Ydensity", Integer.toString(dpi));
jfif.setAttribute("resUnits", "1"); // density is dots per inch
// Write and clean up
imageWriter.write(data, new IIOImage(bufferedImage, null, null), jpegParams);
ios.close();
imageWriter.dispose();
} catch (Exception e) {
return false;
}
return true;
}
