1、前言(瞎扯)
有个需求：整一个给 Word 加水印的demo，于是我就网上找呗~
看到那个Aspose好像是收费的，然后就把目光转向了 POI，看到各种形形色色的也不知道哪个能用。整了一会，自己拷贝出一个比较精简的能用的 demo 了。
2、人狠话不多，上效果图
我一般都是直接上图的，先看效果图（每一页都有的）：
水印的分布如果不理想，只能小伙伴们自行研究调整了~
3、人狠话不多，直接来代码
3.1、我的代码结构
3.2 、直接贴代码了
pom 依赖的版本不要改，修改版本可能会导致一些东西缺失
代码你们可以直接复制这里的使用
或者在码云仓库：点击这里跳转
3.2.1、pom 依赖
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>3.2.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.lyk</groupId> <artifactId>springboot-word-finger</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot-word-finger</name> <description>springboot-word-finger</description> <properties> <java.version>17</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.11.2</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-scratchpad</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>4.1.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build></project>3.2.2、处理工具类
import com.microsoft.schemas.office.office.CTLock;import com.microsoft.schemas.vml.*;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;import org.apache.poi.openxml4j.opc.OPCPackage;import org.apache.poi.wp.usermodel.HeaderFooterType;import org.apache.poi.xwpf.usermodel.XWPFDocument;import org.apache.poi.xwpf.usermodel.XWPFHeader;import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.*;import java.util.stream.Stream;/** * @author: lyk * @description: Word 添加水印工具类 **/public class WatermarkUtil { private static final Logger LOGGER = LoggerFactory.getLogger(WatermarkUtil.class); /** word字体 */ private static final String FONT_NAME = "宋体"; /** 字体大小 */ private static final String FONT_SIZE = "0.2pt"; /** 字体颜色 */ private static final String FONT_COLOR = "#d0d0d0"; /** 一个字平均长度，单位pt，用于：计算文本占用的长度（文本总个数*单字长度）*/ private static final Integer WIDTH_PER_WORD = 10; /** 与顶部的间距 */ private static Integer STYLE_TOP = 0; /** 文本旋转角度 */ private static final String STYLE_ROTATION = "30"; /** * @param inPutPath * @param putPutPath * @param fingerText * @author: lyk * @description: 添加水印入口方法 * @date: 2024/1/25 23:42 **/ public static void waterMarkDocXDocument(String inPutPath, String putPutPath, String fingerText) { long beginTime = System.currentTimeMillis(); try ( OutputStream out = new FileOutputStream(putPutPath); InputStream in = new FileInputStream(inPutPath); OPCPackage srcPackage = OPCPackage.open(in); XWPFDocument doc = new XWPFDocument(srcPackage) ) { // 把整页都打上水印 for (int lineIndex = -5; lineIndex < 20; lineIndex++) { STYLE_TOP = 100 * lineIndex; waterMarkDocXDocument(doc, fingerText); } // 输出新文档 doc.write(out); LOGGER.info("添加水印成功!,一共耗时" + (System.currentTimeMillis() - beginTime) + "毫秒"); } catch (IOException e) { throw new RuntimeException(e); } catch (InvalidFormatException e) { throw new RuntimeException(e); } } /** * 为文档添加水印 * @param doc 需要被处理的docx文档对象 * @param fingerText 需要添加的水印文字 */ public static void waterMarkDocXDocument(XWPFDocument doc, String fingerText) { // 水印文字之间使用8个空格分隔 fingerText = fingerText + repeatString(" ", 8); // 一行水印重复水印文字次数 fingerText = repeatString(fingerText, 10); // 如果之前已经创建过 DEFAULT 的Header，将会复用 XWPFHeader header = doc.createHeader(HeaderFooterType.DEFAULT); int size = header.getParagraphs().size(); if (size == 0) { header.createParagraph(); } CTP ctp = header.getParagraphArray(0).getCTP(); byte[] rsidr = doc.getDocument().getBody().getPArray(0).getRsidR(); byte[] rsidrDefault = doc.getDocument().getBody().getPArray(0).getRsidRDefault(); ctp.setRsidP(rsidr); ctp.setRsidRDefault(rsidrDefault); CTPPr ppr = ctp.addNewPPr(); ppr.addNewPStyle().setVal("Header"); // 开始加水印 CTR ctr = ctp.addNewR(); CTRPr ctrpr = ctr.addNewRPr(); ctrpr.addNewNoProof(); CTGroup group = CTGroup.Factory.newInstance(); CTShapetype shapeType = group.addNewShapetype(); CTTextPath shapeTypeTextPath = shapeType.addNewTextpath(); shapeTypeTextPath.setOn(STTrueFalse.T); shapeTypeTextPath.setFitshape(STTrueFalse.T); CTLock lock = shapeType.addNewLock(); lock.setExt(STExt.VIEW); CTShape shape = group.addNewShape(); shape.setId("PowerPlusWaterMarkObject"); shape.setSpid("_x0000_s102"); shape.setType("#_x0000_t136"); // 设置形状样式（旋转，位置，相对路径等参数） shape.setStyle(getShapeStyle(fingerText)); shape.setFillcolor(FONT_COLOR); // 字体设置为实心 shape.setStroked(STTrueFalse.FALSE); // 绘制文本的路径 CTTextPath shapeTextPath = shape.addNewTextpath(); // 设置文本字体与大小 shapeTextPath.setStyle("font-family:" + FONT_NAME + ";font-size:" + FONT_SIZE); shapeTextPath.setString(fingerText); CTPicture pict = ctr.addNewPict(); pict.set(group); } /** * 构建Shape的样式参数 * * @param fingerText * @return */ private static String getShapeStyle(String fingerText) { StringBuilder sb = new StringBuilder(); // 文本path绘制的定位方式 sb.append("position: ").append("absolute"); // 计算文本占用的长度（文本总个数*单字长度） sb.append(";width: ").append(fingerText.length() * WIDTH_PER_WORD).append("pt"); // 字体高度 sb.append(";height: ").append("20pt"); sb.append(";z-index: ").append("-251654144"); sb.append(";mso-wrap-edited: ").append("f"); // 设置水印的间隔，这是一个大坑，不能用top,必须要margin-top。 sb.append(";margin-top: ").append(STYLE_TOP); sb.append(";mso-position-horizontal-relative: ").append("page"); sb.append(";mso-position-vertical-relative: ").append("page"); sb.append(";mso-position-vertical: ").append("left"); sb.append(";mso-position-horizontal: ").append("center"); sb.append(";rotation: ").append(STYLE_ROTATION); return sb.toString(); } /** * 将指定的字符串重复repeats次. */ private static String repeatString(String pattern, int repeats) { StringBuilder buffer = new StringBuilder(pattern.length() * repeats); Stream.generate(() -> pattern).limit(repeats).forEach(buffer::append); return new String(buffer); }}/** * @author lyk * @version 1.0 * @date 2024/1/25 23:16 * @description */public class Main { public static void main(String[] args) { final String inPath = "src/main/java/com/lyk/finger/doc/aaaa.docx"; final String outPath = "src/main/java/com/lyk/finger/doc/out.docx"; // 添加水印 WatermarkUtil.waterMarkDocXDocument(inPath, outPath, "落魄程序员在线炒粉"); }}4、OK 完事~
拿去好好享用吧~
注意:大文档不确定是否有效，我没有大文档测试，如果那种几百页的文档请自行查看，据网友反馈大文档后面的生成不了水印(200页之后的)
