Spring Boot整合OpenOffice实现Word、Excel、PPT在线预览

<!--jodconverter 核心包 -->
<dependency>
    <groupId>org.jodconverter</groupId>
    <artifactId>jodconverter-core</artifactId>
    <version>4.2.2</version>
</dependency>
<!--springboot支持包，里面包括了自动配置类 -->
<dependency>
    <groupId>org.jodconverter</groupId>
    <artifactId>jodconverter-spring-boot-starter</artifactId>
    <version>4.2.2</version>
</dependency>
<!--jodconverter 本地支持包 -->
<dependency>
    <groupId>org.jodconverter</groupId>
    <artifactId>jodconverter-local</artifactId>
    <version>4.2.2</version>
</dependency>
<!-- commons-io -->
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.6</version>
</dependency>
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server.port=9999
#使能
jodconverter.local.enabled=true
#OpenOffice安装地址
jodconverter.local.office-home=C:/Program Files (x86)/OpenOffice 4
#同时执行任务的个数
jodconverter.local.max-tasks-per-process=10
#设置端口号（任意设置）
jodconverter.local.port-numbers=8110
#controller工具参数
online.buffer.path=C:/online_pdf/
online.buffer.file.name=hello.pdf
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/**
 * @desc: 模拟Dao层
 * @author: YanMingXin
 * @create: 2021/10/4-20:28
 **/
@Repository
public class OnlineDocDao {
    /**
     * 获取文件
     *
     * @param fileIndex
     * @return
     */
    @SuppressWarnings("all")
    public String getFiles(int fileIndex) {
        switch (fileIndex) {
            case 1:
                return "file1.docx";
            case 2:
                return "file2.docx";
            case 3:
                return "file3.docx";
            case 4:
                return "1.xlsx";
            default:
                return "file1.docx";
        }
    }
}
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/**
 * @desc: Service接口
 * @author: YanMingXin
 * @create: 2021/10/4-20:27
 **/
public interface OnlineDocService {
    /**
     * 根据索引获取文件名称
     *
     * @param fileIndex
     * @return
     */
    String readDoc(int fileIndex);
}
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/**
 * @desc: Service实现类
 * @author: YanMingXin
 * @create: 2021/10/4-20:27
 **/
@Service
public class OnlineDocServiceImpl implements OnlineDocService {
    @Autowired
    private OnlineDocDao onlineDocDao;
    @Override
    public String readDoc(int fileIndex) {
        return onlineDocDao.getFiles(fileIndex);
    }
}
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/**
 * @desc: 控制类
 * @author: YanMingXin
 * @create: 2021/10/5-9:50
 **/
@Controller
@SuppressWarnings("all")
public class OnlineDocController {
    /**
     * 注入DocumentConverter（jodconverter内置）
     */
    @Autowired
    private DocumentConverter converter;
    /**
     * 注入Service
     */
    @Autowired
    private OnlineDocService onlineDocService;
    @Value("${online.buffer.path}")
    private String bufferPath;
    @Value("${online.buffer.file.name}")
    private String bufferFileName;
    /**
     * 主要业务逻辑，处理文件请求
     *
     * @param index
     * @param response
     */
    @RequestMapping("/toPdfFile/{index}")
    public void toPdfFile(@PathVariable("index") Integer index, HttpServletResponse response) {
        String fileName = onlineDocService.readDoc(index);
        File file = new File("src/main/resources/static/" + fileName);
        ServletOutputStream outputStream = null;
        InputStream in = null;
        //转换之后文件生成的地址
        File newFile = new File(bufferPath);
        if (!newFile.exists()) newFile.mkdirs();
        try {
            //文件转化
            converter.convert(file).to(new File(bufferPath + bufferFileName)).execute();
            outputStream = response.getOutputStream();
            in = new FileInputStream(new File(bufferPath + bufferFileName));
            IOUtils.copy(in, outputStream);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (in != null) in.close();
                if (outputStream != null) outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
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