Java实现根据模板读取PDF并替换指定内容

<dependencies>
    <dependency>
        <groupId>com.itextpdf</groupId>
        <artifactId>itextpdf</artifactId>
        <version>5.5.13.3</version>
    </dependency>
    <dependency>
        <groupId>com.itextpdf</groupId>
        <artifactId>itext-asian</artifactId>
        <version>5.2.0</version>
    </dependency>
</dependencies>

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.*;
 
import java.io.*;
import java.util.HashMap;
import java.util.Map;
 
public class PdfTemplateProcessor {
    public static void main(String[] args) {
        try {
            // 读取 PDF 模板文件
            PdfReader reader = new PdfReader("template.pdf");
            // 创建一个输出流，用于保存新生成的 PDF
            FileOutputStream outputStream = new FileOutputStream("output.pdf");
            // 创建一个 PdfStamper 对象，用于操作 PDF 内容
            PdfStamper stamper = new PdfStamper(reader, outputStream);
 
            // 获取 PDF 表单
            AcroFields form = stamper.getAcroFields();
            // 设置支持中文
            BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            form.addSubstitutionFont(baseFont);
 
            // 准备要替换的数据
            Map<String, String> data = new HashMap<>();
            data.put("name", "张三");
            data.put("date", "2024-10-01");
 
            // 替换表单中的占位符
            for (Map.Entry<String, String> entry : data.entrySet()) {
                String fieldName = entry.getKey();
                String fieldValue = entry.getValue();
                form.setField(fieldName, fieldValue);
            }
 
            // 关闭表单编辑
            stamper.setFormFlattening(true);
            // 关闭 stamper 和 reader
            stamper.close();
            reader.close();
            outputStream.close();
 
            System.out.println("新的 PDF 文档生成成功！");
        } catch (IOException | DocumentException e) {
            e.printStackTrace();
            System.out.println("生成新的 PDF 文档失败：" + e.getMessage());
        }
    }
}

PdfReader reader = new PdfReader("template.pdf");
FileOutputStream outputStream = new FileOutputStream("output.pdf");
PdfStamper stamper = new PdfStamper(reader, outputStream);

AcroFields form = stamper.getAcroFields();
BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
form.addSubstitutionFont(baseFont);

Map<String, String> data = new HashMap<>();
data.put("name", "张三");
data.put("date", "2024-10-01");

for (Map.Entry<String, String> entry : data.entrySet()) {
    String fieldName = entry.getKey();
    String fieldValue = entry.getValue();
    form.setField(fieldName, fieldValue);
}

stamper.setFormFlattening(true);
stamper.close();
reader.close();
outputStream.close();