「java水印处理」java去水印
本篇文章给大家谈谈java水印处理，以及java去水印对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
java怎么给word文档加水印
可以使用Free Spire.Doc for Java在word文档中添加文本水印或图片水印。Free Spire.Doc for Java下载链接：网页链接
1.添加文本水印——代码如下：
import com.spire.doc.*;
import com.spire.doc.documents.WatermarkLayout;
import java.awt.*;
public class WordTextWatermark {
public static void main(String[] args) {
Document document = new Document();
document.loadFromFile("Sample.docx");
insertTextWatermark(document.getSections().get(0));
}
private static void insertTextWatermark(Section section) {
TextWatermark txtWatermark = new TextWatermark();
txtWatermark.setText("内部使用");
txtWatermark.setFontSize(40);
txtWatermark.setColor(Color.red);
txtWatermark.setLayout(WatermarkLayout.Diagonal);
section.getDocument().setWatermark(txtWatermark);
}
}
2.添加图片水印——代码如下：
import com.spire.doc.*;
public class WordImageWatermark {
public static void main(String[] args) throws Exception{
Document document = new Document();
document.loadFromFile("Sample.docx");
PictureWatermark picture = new PictureWatermark();
picture.setPicture("logo.png");
picture.setScaling(5);
picture.isWashout(false);
document.setWatermark(picture);
document.saveToFile("out/result2.docx",FileFormat.Docx )
}
}
如何用java去除图片水印？
//运行以下程序即可
public class ImageInit {
BufferedImage image;
private int iw, ih;
private int[] pixels;
public ImageInit(BufferedImage image) {
this.image = image;
iw = image.getWidth();
ih = image.getHeight();
pixels = new int[iw * ih];
}
public BufferedImage changeGrey() {
PixelGrabber pg = new PixelGrabber(image.getSource(), 0, 0, iw, ih,
pixels, 0, iw);
try {
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
// 设定二值化的域值，默认值为100
int grey = 100;
// 对图像进行二值化处理，Alpha值保持不变
ColorModel cm = ColorModel.getRGBdefault();
for (int i = 0; i iw * ih; i++) {
int red, green, blue;
int alpha = cm.getAlpha(pixels[i]);
if (cm.getRed(pixels[i]) grey) {
red = 255;
} else {
red = 0;
}
if (cm.getGreen(pixels[i]) grey) {
green = 255;
} else {
green = 0;
}
if (cm.getBlue(pixels[i]) grey) {
blue = 255;
} else {
blue = 0;
}
pixels[i] = alpha 24 | red 16 | green 8 | blue; // 通过移位重新构成某一点像素的RGB值
}
// 将数组中的象素产生一个图像
Image tempImg = Toolkit.getDefaultToolkit().createImage(
new MemoryImageSource(iw, ih, pixels, 0, iw));
image = new BufferedImage(tempImg.getWidth(null),
tempImg.getHeight(null), BufferedImage.TYPE_INT_BGR);
image.createGraphics().drawImage(tempImg, 0, 0, null);
return image;
}
public BufferedImage getMedian() {
PixelGrabber pg = new PixelGrabber(image.getSource(), 0, 0, iw, ih,
pixels, 0, iw);
try {
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
// 对图像进行中值滤波，Alpha值保持不变
ColorModel cm = ColorModel.getRGBdefault();
for (int i = 1; i ih - 1; i++) {
for (int j = 1; j iw - 1; j++) {
int red, green, blue;
int alpha = cm.getAlpha(pixels[i * iw + j]);
// int red2 = cm.getRed(pixels[(i - 1) * iw + j]);
int red4 = cm.getRed(pixels[i * iw + j - 1]);
int red5 = cm.getRed(pixels[i * iw + j]);
int red6 = cm.getRed(pixels[i * iw + j + 1]);
// int red8 = cm.getRed(pixels[(i + 1) * iw + j]);
// 水平方向进行中值滤波
if (red4 = red5) {
if (red5 = red6) {
red = red5;
} else {
if (red4 = red6) {
red = red6;
} else {
red = red4;
}
}
} else {
if (red4 red6) {
red = red4;
} else {
if (red5 red6) {
red = red6;
} else {
red = red5;
}
}
}
int green4 = cm.getGreen(pixels[i * iw + j - 1]);
int green5 = cm.getGreen(pixels[i * iw + j]);
int green6 = cm.getGreen(pixels[i * iw + j + 1]);
// 水平方向进行中值滤波
if (green4 = green5) {
if (green5 = green6) {
green = green5;
} else {
if (green4 = green6) {
green = green6;
} else {
green = green4;
}
}
} else {
if (green4 green6) {
green = green4;
} else {
if (green5 green6) {
green = green6;
} else {
green = green5;
}
}
}
// int blue2 = cm.getBlue(pixels[(i - 1) * iw + j]);
int blue4 = cm.getBlue(pixels[i * iw + j - 1]);
int blue5 = cm.getBlue(pixels[i * iw + j]);
int blue6 = cm.getBlue(pixels[i * iw + j + 1]);
// int blue8 = cm.getBlue(pixels[(i + 1) * iw + j]);
// 水平方向进行中值滤波
if (blue4 = blue5) {
if (blue5 = blue6) {
blue = blue5;
} else {
if (blue4 = blue6) {
blue = blue6;
} else {
blue = blue4;
}
}
} else {
if (blue4 blue6) {
blue = blue4;
} else {
if (blue5 blue6) {
blue = blue6;
} else {
blue = blue5;
}
}
}
pixels[i * iw + j] = alpha 24 | red 16 | green 8
| blue;
}
}
// 将数组中的象素产生一个图像
Image tempImg = Toolkit.getDefaultToolkit().createImage(
new MemoryImageSource(iw, ih, pixels, 0, iw));
image = new BufferedImage(tempImg.getWidth(null),
tempImg.getHeight(null), BufferedImage.TYPE_INT_BGR);
image.createGraphics().drawImage(tempImg, 0, 0, null);
return image;
}
public BufferedImage getGrey() {
ColorConvertOp ccp = new ColorConvertOp(
ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
return image = ccp.filter(image, null);
}
// Brighten using a linear formula that increases all color values
public BufferedImage getBrighten() {
RescaleOp rop = new RescaleOp(1.25f, 0, null);
return image = rop.filter(image, null);
}
// Blur by "convolving" the image with a matrix
public BufferedImage getBlur() {
float[] data = { .1111f, .1111f, .1111f, .1111f, .1111f, .1111f,
.1111f, .1111f, .1111f, };
ConvolveOp cop = new ConvolveOp(new Kernel(3, 3, data));
return image = cop.filter(image, null);
}
// Sharpen by using a different matrix
public BufferedImage getSharpen() {
float[] data = { 0.0f, -0.75f, 0.0f, -0.75f, 4.0f, -0.75f, 0.0f,
-0.75f, 0.0f };
ConvolveOp cop = new ConvolveOp(new Kernel(3, 3, data));
return image = cop.filter(image, null);
}
// 11) Rotate the image 180 degrees about its center point
public BufferedImage getRotate() {
AffineTransformOp atop = new AffineTransformOp(
AffineTransform.getRotateInstance(Math.PI,
image.getWidth() / 2, image.getHeight() / 2),
AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
return image = atop.filter(image, null);
}
public BufferedImage getProcessedImg() {
return image;
}
public static void main(String[] args) throws IOException {
String filePath="F:/k7qp5.png";
FileInputStream fin = new FileInputStream(filePath);
BufferedImage bi = ImageIO.read(fin);
ImageInit flt = new ImageInit(bi);
flt.changeGrey();
flt.getGrey();
flt.getBrighten();
bi = flt.getProcessedImg();
String pname = filePath.substring(0, filePath.lastIndexOf("."));
File file = new File(pname + ".jpg");
ImageIO.write(bi, "jpg", file);
}
}
java 如何给pdf文件加水印
可以使用Spire.PDF for Java通过Java来添加水印。
首先，您需要在 Java 程序中添加 Spire.Pdf.jar 文件作为依赖项。您可以从这个链接下载 JAR 文件；如果您使用 Maven，则可以通过在 pom.xml 文件中添加以下代码导入 JAR 文件。
repositories
repository
idcom.e-iceblue/id
url;/url
/repository/repositoriesdependencies
dependency
groupIde-iceblue/groupId
artifactIdspire.pdf/artifactId
version5.3.1/version
/dependency/dependencies
1.添加图片水印
代码如下：
import com.spire.pdf.*;
import java.awt.geom.Rectangle2D;
public class watermark {
public static void main(String[] args) {
//加载PDF文档
PdfDocument doc = new PdfDocument();
doc.loadFromFile("C:\\Users\\Administrator\\Desktop\\Sample.pdf");
//获取第一页
PdfPageBase page = doc.getPages().get(0);
//设置背景图片
page.setBackgroundImage("C:\\Users\\Administrator\\Desktop\\logo.png");
//设置背景区域
Rectangle2D.Float rect = new Rectangle2D.Float();
rect.setRect(280, 300, 150, 150);
page.setBackgroundRegion(rect);
//保存文档
doc.saveToFile("output/imageWaterMark.pdf");
doc.close();
}
}
2.添加文本水印
代码如下：
import com.spire.pdf.*;
import com.spire.pdf.graphics.*;
import java.awt.*;
import java.awt.geom.*;
public class Textwatermark {
public static void main(String[] args) {
//创建PdfDocument对象
PdfDocument pdf = new PdfDocument();
//加载示例文档
pdf.loadFromFile("C:\\Users\\Administrator\\Desktop\\Sample.pdf");
//获取第一页
PdfPageBase page = pdf.getPages().get(0);
//调用insertWatermark方法插入文本水印
insertWatermark(page, "E-ICEBLUE");
//保存文档
pdf.saveToFile("out/textWaterMark.pdf");
}
static void insertWatermark(PdfPageBase page, String watermark) {
Dimension2D dimension2D = new Dimension();
dimension2D.setSize(page.getCanvas().getClientSize().getWidth() / 2, page.getCanvas().getClientSize().getHeight() / 3);
PdfTilingBrush brush = new PdfTilingBrush(dimension2D);
brush.getGraphics().setTransparency(0.3F);
brush.getGraphics().save();
brush.getGraphics().translateTransform((float) brush.getSize().getWidth() / 2, (float) brush.getSize().getHeight() / 2);
brush.getGraphics().rotateTransform(-45);
brush.getGraphics().drawString(watermark, new PdfFont(PdfFontFamily.Helvetica, 24), PdfBrushes.getViolet(), 0, 0, new PdfStringFormat(PdfTextAlignment.Center));
brush.getGraphics().restore();
brush.getGraphics().setTransparency(1);
Rectangle2D loRect = new Rectangle2D.Float();
loRect.setFrame(new Point2D.Float(0, 0), page.getCanvas().getClientSize());
page.getCanvas().drawRectangle(brush, loRect);
}
}
希望对您有帮助。
Java给ceb文件添加水印
通过设置页面，点击添加水印即可
通过设置页面，点击添加水印就可以，或则到“控制面板”-“打印机和传真”里面，把“adobe PDF”打印机改名为“PDF”，就可以打印成pdf了。
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发布于：2022-12-05，除非注明，否则均为原创文章，转载请注明出处。