我要评论1、前言
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
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~
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