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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
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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 )
}
}
添加水印可以参考使用控件来添加的方法，如下：
1. 添加单个图片水印效果：
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. 添加平铺图片水印效果
import com.spire.pdf.*;
import com.spire.pdf.graphics.PdfImage;
import com.spire.pdf.graphics.PdfTilingBrush;
import java.awt.*;
import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
public class AddBackground {
public static void main(String[] args) {
//创建PdfDocument对象,并加载PDF测试文档
PdfDocument pdf = new PdfDocument();
pdf.loadFromFile("test.pdf");
//遍历文档每一页,加载图片，并设置成平铺背景（水印）
for (int i = 0; i pdf.getPages().getCount();i++)
{
PdfPageBase page = pdf.getPages().get(i);
Dimension2D dimension2D = new Dimension();
dimension2D.setSize(page.getCanvas().getSize().getWidth()/4, page.getCanvas().getSize().getHeight()/3);
PdfTilingBrush brush = new PdfTilingBrush(dimension2D);
brush.getGraphics().setTransparency(0.2f);
brush.getGraphics().translateTransform(brush.getSize().getWidth()/10,brush.getSize().getHeight()/10);
brush.getGraphics().rotateTransform(30);
PdfImage image = PdfImage.fromImage("logo.png");
brush.getGraphics().drawImage(image,brush.getSize().getWidth()-image.getWidth()/2,(brush.getSize().getHeight())/2);
Rectangle2D rectangle2D = new Rectangle2D.Float();
rectangle2D.setFrame(new Point(0,0),page.getCanvas().getClientSize());
page.getCanvas().drawRectangle(brush,rectangle2D);
}
//保存文档
pdf.saveToFile("SetTiledBackground.pdf");
pdf.dispose();
}
}
注：这里使用的是free Spire.Pdf.jar(以上代码参考自文章1、文章2）
package util;
import java awt AlphaComposite;
import java awt Color;
import java awt Font;
import java awt Graphics D;
import java awt Image;
import java awt geom AffineTransform;
import java awt image AffineTransformOp;
import java awt image BufferedImage;
import java io File;
import java io IOException;
import javax imageio ImageIO;
/**
* @author Eric Xu
*
*/
public final class ImageUtils {
/**
* 图片水印
* @param pressImg 水印图片
* @param targetImg 目标图片
* @param x 修正值 默认在中间
* @param y 修正值 默认在中间
* @param alpha 透明度
*/
public final static void pressImage(String pressImg String targetImg int x int y float alpha) {
try {
File img = new File(targetImg);
Image src = ImageIO read(img);
int wideth = src getWidth(null);
int height = src getHeight(null);
BufferedImage image = new BufferedImage(wideth height BufferedImage TYPE_INT_RGB);
Graphics D g = image createGraphics();
g drawImage(src wideth height null);
//水印文件
Image src_biao = ImageIO read(new File(pressImg));
int wideth_biao = src_biao getWidth(null);
int height_biao = src_biao getHeight(null);
g setComposite(AlphaComposite getInstance(AlphaComposite SRC_ATOP alpha));
g drawImage(src_biao (wideth wideth_biao) / (height height_biao) / wideth_biao height_biao null);
//水印文件结束
g dispose();
ImageIO write((BufferedImage) image jpg img);
} catch (Exception e) {
e printStackTrace();
}
}
/**
* 文字水印
* @param pressText 水印文字
* @param targetImg 目标图片
* @param fontName 字体名称
* @param fontStyle 字体样式
* @param color 字体颜色
* @param fontSize 字体大小
* @param x 修正值
* @param y 修正值
* @param alpha 透明度
*/
public static void pressText(String pressText String targetImg String fontName int fontStyle Color color int fontSize int x int y float alpha) {
try {
File img = new File(targetImg);
Image src = ImageIO read(img);
int width = src getWidth(null);
int height = src getHeight(null);
BufferedImage image = new BufferedImage(width height BufferedImage TYPE_INT_RGB);
Graphics D g = image createGraphics();
g drawImage(src width height null);
g setColor(color);
g setFont(new Font(fontName fontStyle fontSize));
g setComposite(AlphaComposite getInstance(AlphaComposite SRC_ATOP alpha));
g drawString(pressText (width (getLength(pressText) * fontSize)) / + x (height fontSize) / + y);
g dispose();
ImageIO write((BufferedImage) image jpg img);
} catch (Exception e) {
e printStackTrace();
}
}
/**
* 缩放
* @param filePath 图片路径
* @param height 高度
* @param width 宽度
* @param bb 比例不对时是否需要补白
*/
public static void resize(String filePath int height int width boolean bb) {
try {
double ratio = ; //缩放比例
File f = new File(filePath);
BufferedImage bi = ImageIO read(f);
Image itemp = bi getScaledInstance(width height bi SCALE_SMOOTH);
//计算比例
if ((bi getHeight() height) || (bi getWidth() width)) {
if (bi getHeight() bi getWidth()) {
ratio = (new Integer(height)) doubleValue() / bi getHeight();
} else {
ratio = (new Integer(width)) doubleValue() / bi getWidth();
}
AffineTransformOp op = new AffineTransformOp(AffineTransform getScaleInstance(ratio ratio) null);
itemp = op filter(bi null);
}
if (bb) {
BufferedImage image = new BufferedImage(width height BufferedImage TYPE_INT_RGB);
Graphics D g = image createGraphics();
g setColor(Color white);
g fillRect( width height);
if (width == itemp getWidth(null))
g drawImage(itemp (height itemp getHeight(null)) / itemp getWidth(null) itemp getHeight(null) Color white null);
else
g drawImage(itemp (width itemp getWidth(null)) / itemp getWidth(null) itemp getHeight(null) Color white null);
g dispose();
itemp = image;
}
ImageIO write((BufferedImage) itemp jpg f);
} catch (IOException e) {
e printStackTrace();
}
}
public static void main(String[] args) throws IOException {
pressImage( D:\\shuiyin png D:\\test jpg f);
pressText( 我是文字水印 D:\\test jpg 微软雅黑 Color white f);
resize( D:\\test jpg true);
}
public static int getLength(String text) {
int length = ;
for (int i = ; i text length(); i++) {
if (new String(text charAt(i) + ) getBytes() length ) {
length += ;
} else {
length += ;
}
}
return length / ;
}
lishixinzhi/Article/program/Java/hx/201311/26874
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。