Java代码实现word转pdf实现

• 背景
  基于Java-documents4j库代码实现的word转pdf
  网上查询了很多资料要么依赖缺省 要么收费 要么配置复杂 一言难尽…
  重要提示 这个方案需要Microsoft Word或LibreOffice作为转换引擎。下面提供简洁、可直接运行的代码，并解决依赖问题。
  注意：documents4j需要本机安装Microsoft Word或LibreOffice。这里我们假设使用Microsoft Word（转换质量更高）。

1.环境准备

SpringBoot 2.7.3
Jdk 11
maven 3.6.2

2.导入maven依赖

 <dependency>
     <groupId>com.documents4j</groupId>
        <artifactId>documents4j-local</artifactId>
        <version>1.0.3</version>
    </dependency>
    <dependency>
        <groupId>com.documents4j</groupId>
        <artifactId>documents4j-transformer-msoffice-word</artifactId>
        <version>1.0.3</version>
 </dependency>

3. 代码示例

import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import com.documents4j.api.DocumentType;
import com.documents4j.api.IConverter;
import com.documents4j.job.LocalConverter;

 public static void convert(String inputPath, String outputPath) {
        File inputFile = new File(inputPath);
        File outputFile = new File(outputPath);

        try (InputStream in = new FileInputStream(inputFile);
             OutputStream out = new FileOutputStream(outputFile)) {

            // 使用系统默认安装的MS Word
            IConverter converter = LocalConverter.builder()
                    .build();

            converter.convert(in)
                    .as(DocumentType.DOCX)
                    .to(out)
                    .as(DocumentType.PDF)
                    .execute();

            System.out.println("文档转换成功: " + outputPath);
            converter.shutDown();
        } catch (Exception e) {
            System.err.println("转换失败: " + e.getMessage());

            // 自动回退到LibreOffice
            if (e.getMessage().contains("Microsoft Word")) {
                System.out.println("尝试使用LibreOffice...");
                convertWithLibreOffice(inputPath, outputPath);
            }
        }
    }

    private static void convertWithLibreOffice(String inputPath, String outputPath) {
        try (InputStream in = new FileInputStream(inputPath);
             OutputStream out = new FileOutputStream(outputPath)) {

            IConverter converter = LocalConverter.builder()
            .build();

            converter.convert(in)
                    .as(DocumentType.DOCX)
                    .to(out)
                    .as(DocumentType.PDF)
                    .execute();

            System.out.println("使用LibreOffice转换成功");

        } catch (Exception e) {
            System.err.println("LibreOffice转换失败: " + e.getMessage());
        }
    }

    public static void main(String[] args) {
        // 示例用法 - 更改配置直接调用
        convert("your input file path", "your output file path");
    }

4.扩展

也可以基于SpringMVC 进行web集成直接输出响应流
完毕…