Java通过Freemarker模板实现生成Word文件

1. 准备模板

模板 + 数据 = 模型

1、将准备好的Word模板文件另存为.xml文件（PS：建议使用WPS来创建Word文件，不建议用Office）

2、将.xml文件重命名为.ftl文件

3、用文本编辑器打开.ftl文件，将内容复制出来，格式化一下，再覆盖原来的内容

（PS：格式化一下是为了方便查找并设置变量/占位符，当然设置好模板参数变量以后可以再压缩后再写会.ftl文件）

另外，强烈不建议在word文件中去编辑设置模板变量，因为.docx文件在另存为.xml文件后，原先好好的一个变量可能就被拆开了，建议另存为之后再用文本编辑器打开去编辑。

4、设置模板参数（变量/占位符）

2. 代码实现

pom.xml

 
<?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>2.7.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo920</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo920</name>
    <description>demo920</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-core</artifactId>
            <version>5.8.7</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.13.3</version>
        </dependency>
        <!--<dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-words</artifactId>
            <version>22.9</version>
            <classifier>jdk17</classifier>
        </dependency>-->
 
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>

写个类测试一下

 
package com.example.demo920;
 
import com.example.demo920.domain.LoanReceipt;
 
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
 
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.math.BigDecimal;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
 
@SpringBootTest
class Demo920ApplicationTests {
 
    private DateTimeFormatter DTF = DateTimeFormatter.ofPattern("yyyyMMddHHmmss", Locale.CHINA);
 
    @Test
    void contextLoads() {
    }
 
    @Test
    void testGenerateWord() throws Exception {
        Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
        configuration.setDefaultEncoding("UTF-8");
        configuration.setClassForTemplateLoading(this.getClass(), "/templates");
 
        Template template = configuration.getTemplate("借条.ftl");
 
        Path path = Paths.get("tmp","contract");
        File fileDir = path.toFile();
        if (!fileDir.exists()) {
            fileDir.mkdirs();
        }
 
        String filename = "借条" + "_" + LocalDateTime.now().format(DTF) + ".docx";
        filename = path.toFile() + File.separator + filename;
 
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filename)));
 
//        template.process(getDataMap(), writer);
        template.process(getData(), writer);
 
        writer.flush();
        writer.close();
    }
 
    Map<String, Object> getDataMap() {
        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("borrowerName", "李白");
        dataMap.put("borrowerIdCard", "421302199001012426");
        dataMap.put("lenderName", "杜甫");
        dataMap.put("amount", 100);
        dataMap.put("amountInWords", "壹佰");
        dataMap.put("startDate", "2022年8月15日");
        dataMap.put("endDate", "2022年11月11日");
        dataMap.put("borrowingMonths", 3);
        dataMap.put("interestRate", "1.23");
        dataMap.put("guarantorName", "白居易");
        dataMap.put("guarantorIdCard", "421302199203152412");
        return dataMap;
    }
 
    LoanReceipt getData() {
        LoanReceipt receipt = new LoanReceipt();
        receipt.setBorrowerName("狄仁杰");
        receipt.setBorrowerIdCard("421302198710121234");
        receipt.setBorrowingMonths(6);
        receipt.setLenderName("李元芳");
        receipt.setAmount(new BigDecimal("101"));
        receipt.setAmountInWords("壹佰零壹");
        receipt.setInterestRate(new BigDecimal("0.6"));
        receipt.setStartDate("2022年1月1日");
        receipt.setEndDate("2022年6月30日");
        receipt.setGuarantorName("武则天");
        receipt.setGuarantorIdCard("421302199101014567");
        return receipt;
    }
 
}

最主要的是下面两行

 
//	加载模板
Template template = configuration.getTemplate("借条.ftl");
//	填充数据
template.process(getData(), writer);

数据可以是Map也可以是一个对象

改进一下，将生成文件的操作单独写成一个工具方法

 
package com.example.demo920.util;
 
import cn.hutool.core.io.IoUtil;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
 
import java.io.*;
 
public class FreemarkerUtils {
 
    /**
     * 生成Word
     * @param templateDir   模板所在的目录
     * @param templateName  模板文件名称
     * @param filename      生成的文件（含路径）
     * @param dataModel     模板参数数据
     */
    public static void generateWord(File templateDir, String templateName, String filename, Object dataModel) {
        BufferedWriter writer = null;
        Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
        configuration.setDefaultEncoding("UTF-8");
        try {
            configuration.setDirectoryForTemplateLoading(templateDir);
            Template template = configuration.getTemplate(templateName);
            writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filename)));
            template.process(dataModel, writer);
            writer.flush();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (TemplateException e) {
            throw new RuntimeException(e);
        } finally {
            IoUtil.close(writer);
        }
    }
 
}

再测试一下

 
package com.example.demo920;
 
import cn.hutool.core.io.IoUtil;
import com.example.demo920.util.FreemarkerUtils;
import com.example.demo920.util.PdfUtils;
import org.junit.jupiter.api.Test;
import org.springframework.util.ResourceUtils;
 
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
 
public class WordTest {
 
    /**
     * 1、从文件服务器下载模板文件
     * 2、根据业务类型获取需要填充模板的数据
     * 3、模板+数据  再经过处理生成新的文件
     * 4、将生成后的文件上传到文件服务器，并返回一个文件ID
     * 5、业务可以保存这个文件ID或者文件的路径
     */
    @Test
    void testGenerateWordV1() throws Exception {
        Path tempPath = Paths.get("tmp", "contract2");
        File path = tempPath.toFile();
        if (!path.exists()) {
            path.mkdirs();
        }
        File tempFile = Files.createTempFile(tempPath, "qiantiao", ".docx").toFile();
        System.out.println(tempFile.getParent());
        System.out.println(tempFile.getName());
        FileOutputStream fos = new FileOutputStream(tempFile);
 
 
        File templateFile = ResourceUtils.getFile("classpath:templates/借条.ftl");
        FileInputStream fis = new FileInputStream(templateFile);
 
        IoUtil.copy(fis, fos);
 
        String filename = "借条" + "_" + System.currentTimeMillis() + ".docx";
        filename = "tmp/contract" + File.separator + filename;
 
        FreemarkerUtils.generateWord(new File(tempFile.getParent()), tempFile.getName(), filename, getDataMap());
    }
 
 	/**
     * 获取数据
     */
    Map<String, Object> getDataMap() {
        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("borrowerName", "李白2");
        dataMap.put("borrowerIdCard", "421302199001012426");
        dataMap.put("lenderName", "杜甫");
        dataMap.put("amount", 100);
        dataMap.put("amountInWords", "壹佰");
        dataMap.put("startDate", "2022年8月15日");
        dataMap.put("endDate", "2022年11月11日");
        dataMap.put("borrowingMonths", 3);
        dataMap.put("interestRate", "1.23");
        dataMap.put("guarantorName", "白居易");
        dataMap.put("guarantorIdCard", "421302199203152412");
        return dataMap;
    }
 
    @Test
    void testGenerateWord2() throws Exception {
        File templateDir = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX + "templates");
        String templateName = "借条.ftl";
        String destFilename = "借条" + System.currentTimeMillis() + ".docx";
        Map<String, Object> data = getDataMap();
        FreemarkerUtils.generateWord(templateDir, templateName, destFilename, data);
    }
 
}

3. PDF文件加水印

有时候，生成或者从服务器下载的文件是需要加水印的，比如标识这个文件是谁下载的之类的

pdf加水印还是比较方便的，用itext组件可以轻松实现

另外，如果最终需要pdf文件，建议直接生成pdf文件，跳过word转pdf的步骤

 
package com.example.demo920.util;
 
import cn.hutool.core.io.IoUtil;
import com.aspose.words.Document;
import com.aspose.words.SaveFormat;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Element;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.*;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.time.LocalDateTime;
 
/**
 * @author chengjiansheng
 * @date 2022/09/21
 */
public class PdfUtils {
 
    /**
     * Word转PDF
     * https://www.aspose.com/
     * 注意：Aspose.Words 这个组件是收费的，如果购买的话生成的PDF会有水印。
     * 可以去找相应的破解版本，但是我感觉完全可以跳过Word直接生成PDF。
     * 比如，可以通过Freemarker直接生成PDF，或者利用iText通过模板生成PDF
     * @param src
     * @param dest
     */
    public static void wordToPdf(String src, String dest) {
        File file = new File(src);
        if (!file.exists()) {
            throw new RuntimeException("文件不存在");
        }
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(file);
            Document wpd = new Document(fis);
            wpd.save(dest, SaveFormat.PDF);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            IoUtil.close(fis);
        }
    }
 
    /**
     * 加水印
     * @param src   源文件
     * @param dest  目标文件
     * @param text  文字
     * @param imagePath 图片地址
     */
    public static void addWatermark(String src, String dest, String text, String imagePath) {
        try {
            //  待加水印的文件
            PdfReader reader = new PdfReader(src);
            //  加完水印的文件
            PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
            //  字体
            BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            //  透明度
            PdfGState gs = new PdfGState();
            gs.setFillOpacity(0.4f);
            //  PDF文件总页数
            int total = reader.getNumberOfPages() + 1;
            //  循环对每一页都加水印
            PdfContentByte content;
            for (int i = 1; i < total; i++) {
                //  水印在文本之上
                content = stamper.getOverContent(i);
                content.setGState(gs);
 
                if (null != imagePath) {
                    Image image = Image.getInstance(imagePath);
//                    image.setAbsolutePosition(150, 150);
//                    image.scaleToFit(300,300);
//                    content.addImage(image);
 
                    for (int x = 0; x < 700; x = x + 300) {
                        for (int y = 0; y < 900; y = y + 200) {
                            image.setAbsolutePosition(x+50, y+50);
                            image.scaleToFit(100,100);
                            content.addImage(image);
                        }
                    }
                }
                if (null != text) {
                    content.beginText();
                    content.setColorFill(BaseColor.RED);
                    content.setFontAndSize(baseFont, 20);
//                    content.showTextAligned(Element.ALIGN_CENTER, text, 50, 50, 45);
 
                    for (int x = 0; x < 700; x = x + 300) {
                        for (int y = 0; y < 900; y = y + 200) {
                            //水印内容和水印位置
                            content.showTextAligned(Element.ALIGN_CENTER, "哈哈哈哈哈", x - 20, y + 10, 30);
                            content.showTextAligned(Element.ALIGN_CENTER, LocalDateTime.now().toString(), x, y, 30);
                        }
                    }
 
                    content.endText();
                }
            }
            stamper.close();
            reader.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } catch (DocumentException e) {
            throw new RuntimeException(e);
        }
    }
}

跑一下

 
@Test
void testWatermark() {
    String src2 = "D:\\借条_2.pdf";
    String dest2 = "D:\\借条_3.pdf";
    String imagePath = "D:\\1.jpg";
    PdfUtils.addWatermark(src2, dest2, "哈哈哈哈哈", imagePath);
}

加完水印后效果如图

最后，示例项目结构如图

	<?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>2.7.3</version>
	<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>demo920</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo920</name>
	<description>demo920</description>
	<properties>
	<java.version>1.8</java.version>
	</properties>
	<dependencies>
	<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-freemarker</artifactId>
	</dependency>
	<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
	</dependency>
	<dependency>
	<groupId>cn.hutool</groupId>
	<artifactId>hutool-core</artifactId>
	<version>5.8.7</version>
	</dependency>
	<dependency>
	<groupId>com.itextpdf</groupId>
	<artifactId>itextpdf</artifactId>
	<version>5.5.13.3</version>
	</dependency>
	<!--<dependency>
	<groupId>com.aspose</groupId>
	<artifactId>aspose-words</artifactId>
	<version>22.9</version>
	<classifier>jdk17</classifier>
	</dependency>-->

	<dependency>
	<groupId>org.projectlombok</groupId>
	<artifactId>lombok</artifactId>
	<optional>true</optional>
	</dependency>
	<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-test</artifactId>
	<scope>test</scope>
	</dependency>
	</dependencies>

	<build>
	<plugins>
	<plugin>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-maven-plugin</artifactId>
	<configuration>
	<excludes>
	<exclude>
	<groupId>org.projectlombok</groupId>
	<artifactId>lombok</artifactId>
	</exclude>
	</excludes>
	</configuration>
	</plugin>
	</plugins>
	</build>

	</project>

	package com.example.demo920;

	import com.example.demo920.domain.LoanReceipt;

	import freemarker.template.Configuration;
	import freemarker.template.Template;
	import org.junit.jupiter.api.Test;
	import org.springframework.boot.test.context.SpringBootTest;

	import java.io.BufferedWriter;
	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.OutputStreamWriter;
	import java.math.BigDecimal;
	import java.nio.file.Path;
	import java.nio.file.Paths;
	import java.time.LocalDateTime;
	import java.time.format.DateTimeFormatter;
	import java.util.HashMap;
	import java.util.Locale;
	import java.util.Map;

	@SpringBootTest
	class Demo920ApplicationTests {

	private DateTimeFormatter DTF = DateTimeFormatter.ofPattern("yyyyMMddHHmmss", Locale.CHINA);

	@Test
	void contextLoads() {
	}

	@Test
	void testGenerateWord() throws Exception {
	Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
	configuration.setDefaultEncoding("UTF-8");
	configuration.setClassForTemplateLoading(this.getClass(), "/templates");

	Template template = configuration.getTemplate("借条.ftl");

	Path path = Paths.get("tmp","contract");
	File fileDir = path.toFile();
	if (!fileDir.exists()) {
	fileDir.mkdirs();
	}

	String filename = "借条" + "_" + LocalDateTime.now().format(DTF) + ".docx";
	filename = path.toFile() + File.separator + filename;

	BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filename)));

	// template.process(getDataMap(), writer);
	template.process(getData(), writer);

	writer.flush();
	writer.close();
	}

	Map<String, Object> getDataMap() {
	Map<String, Object> dataMap = new HashMap<>();
	dataMap.put("borrowerName", "李白");
	dataMap.put("borrowerIdCard", "421302199001012426");
	dataMap.put("lenderName", "杜甫");
	dataMap.put("amount", 100);
	dataMap.put("amountInWords", "壹佰");
	dataMap.put("startDate", "2022年8月15日");
	dataMap.put("endDate", "2022年11月11日");
	dataMap.put("borrowingMonths", 3);
	dataMap.put("interestRate", "1.23");
	dataMap.put("guarantorName", "白居易");
	dataMap.put("guarantorIdCard", "421302199203152412");
	return dataMap;
	}

	LoanReceipt getData() {
	LoanReceipt receipt = new LoanReceipt();
	receipt.setBorrowerName("狄仁杰");
	receipt.setBorrowerIdCard("421302198710121234");
	receipt.setBorrowingMonths(6);
	receipt.setLenderName("李元芳");
	receipt.setAmount(new BigDecimal("101"));
	receipt.setAmountInWords("壹佰零壹");
	receipt.setInterestRate(new BigDecimal("0.6"));
	receipt.setStartDate("2022年1月1日");
	receipt.setEndDate("2022年6月30日");
	receipt.setGuarantorName("武则天");
	receipt.setGuarantorIdCard("421302199101014567");
	return receipt;
	}

	}

	// 加载模板
	Template template = configuration.getTemplate("借条.ftl");
	// 填充数据
	template.process(getData(), writer);

	package com.example.demo920.util;

	import cn.hutool.core.io.IoUtil;
	import freemarker.template.Configuration;
	import freemarker.template.Template;
	import freemarker.template.TemplateException;

	import java.io.*;

	public class FreemarkerUtils {

	/**
	* 生成Word
	* @param templateDir 模板所在的目录
	* @param templateName 模板文件名称
	* @param filename 生成的文件（含路径）
	* @param dataModel 模板参数数据
	*/
	public static void generateWord(File templateDir, String templateName, String filename, Object dataModel) {
	BufferedWriter writer = null;
	Configuration configuration = new Configuration(Configuration.VERSION_2_3_31);
	configuration.setDefaultEncoding("UTF-8");
	try {
	configuration.setDirectoryForTemplateLoading(templateDir);
	Template template = configuration.getTemplate(templateName);
	writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filename)));
	template.process(dataModel, writer);
	writer.flush();
	} catch (IOException e) {
	throw new RuntimeException(e);
	} catch (TemplateException e) {
	throw new RuntimeException(e);
	} finally {
	IoUtil.close(writer);
	}
	}

	}

	package com.example.demo920;

	import cn.hutool.core.io.IoUtil;
	import com.example.demo920.util.FreemarkerUtils;
	import com.example.demo920.util.PdfUtils;
	import org.junit.jupiter.api.Test;
	import org.springframework.util.ResourceUtils;

	import java.io.*;
	import java.nio.file.Files;
	import java.nio.file.Path;
	import java.nio.file.Paths;
	import java.time.LocalDateTime;
	import java.util.HashMap;
	import java.util.Map;

	public class WordTest {

	/**
	* 1、从文件服务器下载模板文件
	* 2、根据业务类型获取需要填充模板的数据
	* 3、模板+数据再经过处理生成新的文件
	* 4、将生成后的文件上传到文件服务器，并返回一个文件ID
	* 5、业务可以保存这个文件ID或者文件的路径
	*/
	@Test
	void testGenerateWordV1() throws Exception {
	Path tempPath = Paths.get("tmp", "contract2");
	File path = tempPath.toFile();
	if (!path.exists()) {
	path.mkdirs();
	}
	File tempFile = Files.createTempFile(tempPath, "qiantiao", ".docx").toFile();
	System.out.println(tempFile.getParent());
	System.out.println(tempFile.getName());
	FileOutputStream fos = new FileOutputStream(tempFile);


	File templateFile = ResourceUtils.getFile("classpath:templates/借条.ftl");
	FileInputStream fis = new FileInputStream(templateFile);

	IoUtil.copy(fis, fos);

	String filename = "借条" + "_" + System.currentTimeMillis() + ".docx";
	filename = "tmp/contract" + File.separator + filename;

	FreemarkerUtils.generateWord(new File(tempFile.getParent()), tempFile.getName(), filename, getDataMap());
	}

	/**
	* 获取数据
	*/
	Map<String, Object> getDataMap() {
	Map<String, Object> dataMap = new HashMap<>();
	dataMap.put("borrowerName", "李白2");
	dataMap.put("borrowerIdCard", "421302199001012426");
	dataMap.put("lenderName", "杜甫");
	dataMap.put("amount", 100);
	dataMap.put("amountInWords", "壹佰");
	dataMap.put("startDate", "2022年8月15日");
	dataMap.put("endDate", "2022年11月11日");
	dataMap.put("borrowingMonths", 3);
	dataMap.put("interestRate", "1.23");
	dataMap.put("guarantorName", "白居易");
	dataMap.put("guarantorIdCard", "421302199203152412");
	return dataMap;
	}

	@Test
	void testGenerateWord2() throws Exception {
	File templateDir = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX + "templates");
	String templateName = "借条.ftl";
	String destFilename = "借条" + System.currentTimeMillis() + ".docx";
	Map<String, Object> data = getDataMap();
	FreemarkerUtils.generateWord(templateDir, templateName, destFilename, data);
	}

	}

	package com.example.demo920.util;

	import cn.hutool.core.io.IoUtil;
	import com.aspose.words.Document;
	import com.aspose.words.SaveFormat;
	import com.itextpdf.text.BaseColor;
	import com.itextpdf.text.DocumentException;
	import com.itextpdf.text.Element;
	import com.itextpdf.text.Image;
	import com.itextpdf.text.pdf.*;

	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileOutputStream;
	import java.io.IOException;
	import java.time.LocalDateTime;

	/**
	* @author chengjiansheng
	* @date 2022/09/21
	*/
	public class PdfUtils {

	/**
	* Word转PDF
	* https://www.aspose.com/
	* 注意：Aspose.Words 这个组件是收费的，如果购买的话生成的PDF会有水印。
	* 可以去找相应的破解版本，但是我感觉完全可以跳过Word直接生成PDF。
	* 比如，可以通过Freemarker直接生成PDF，或者利用iText通过模板生成PDF
	* @param src
	* @param dest
	*/
	public static void wordToPdf(String src, String dest) {
	File file = new File(src);
	if (!file.exists()) {
	throw new RuntimeException("文件不存在");
	}
	FileInputStream fis = null;
	try {
	fis = new FileInputStream(file);
	Document wpd = new Document(fis);
	wpd.save(dest, SaveFormat.PDF);
	} catch (Exception e) {
	throw new RuntimeException(e);
	} finally {
	IoUtil.close(fis);
	}
	}

	/**
	* 加水印
	* @param src 源文件
	* @param dest 目标文件
	* @param text 文字
	* @param imagePath 图片地址
	*/
	public static void addWatermark(String src, String dest, String text, String imagePath) {
	try {
	// 待加水印的文件
	PdfReader reader = new PdfReader(src);
	// 加完水印的文件
	PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
	// 字体
	BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
	// 透明度
	PdfGState gs = new PdfGState();
	gs.setFillOpacity(0.4f);
	// PDF文件总页数
	int total = reader.getNumberOfPages() + 1;
	// 循环对每一页都加水印
	PdfContentByte content;
	for (int i = 1; i < total; i++) {
	// 水印在文本之上
	content = stamper.getOverContent(i);
	content.setGState(gs);

	if (null != imagePath) {
	Image image = Image.getInstance(imagePath);
	// image.setAbsolutePosition(150, 150);
	// image.scaleToFit(300,300);
	// content.addImage(image);

	for (int x = 0; x < 700; x = x + 300) {
	for (int y = 0; y < 900; y = y + 200) {
	image.setAbsolutePosition(x+50, y+50);
	image.scaleToFit(100,100);
	content.addImage(image);
	}
	}
	}
	if (null != text) {
	content.beginText();
	content.setColorFill(BaseColor.RED);
	content.setFontAndSize(baseFont, 20);
	// content.showTextAligned(Element.ALIGN_CENTER, text, 50, 50, 45);

	for (int x = 0; x < 700; x = x + 300) {
	for (int y = 0; y < 900; y = y + 200) {
	//水印内容和水印位置
	content.showTextAligned(Element.ALIGN_CENTER, "哈哈哈哈哈", x - 20, y + 10, 30);
	content.showTextAligned(Element.ALIGN_CENTER, LocalDateTime.now().toString(), x, y, 30);
	}
	}

	content.endText();
	}
	}
	stamper.close();
	reader.close();
	} catch (IOException e) {
	throw new RuntimeException(e);
	} catch (DocumentException e) {
	throw new RuntimeException(e);
	}
	}
	}

	@Test
	void testWatermark() {
	String src2 = "D:\\借条_2.pdf";
	String dest2 = "D:\\借条_3.pdf";
	String imagePath = "D:\\1.jpg";
	PdfUtils.addWatermark(src2, dest2, "哈哈哈哈哈", imagePath);
	}