本文主要是介绍SpringBoot整合OpenOffice4实现office文件预览和转码，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
一、OpenOffice下载
OpenOffice是开放免费的文字处理软件，可借助Apache OpenOffice服务然先将word，ppt等转换成pdf，然后在通过在线pdf在线预览的迂回方式实现office文件预览。
OpenOffice下载地址：https://www.openoffice.org/zh-cn/download/index.html
选择要下载的平台和版本，点击Download full installation下载即可。
二、OpenOffice安装启动
安装可以使用rpm方式进行安装，但是坑比较多，少这个少那个的。网上有很多。
这里介绍docker方式安装OpenOffice
2.1、下载docker镜像
docker镜像地址 https://hub.docker.com/r/954l/openoffice/tags
这里是4.1.13的版本，已经比较新了
docker pull 954l/openoffice:4.1.13
2.2 启动docker镜像
首先创建文件目录：
mkdir /data/openoffice/files
然后启动docker容器：
docker run -d --name openOffice --restart=always -p 8100:8100 -v /data/openoffice/files/:/data/files 954l/openoffice:4.1.13
查看启动情况：OK
[root@nb002 files]# docker ps | grep openoffice
74b098982074 954l/openoffice:4.1.13 "/bin/sh -c '/opt/op…" 2 hours ago Up 2 hours 0.0.0.0:8100->8100/tcp, :::8100->8100/tcp openOffice
三、OpenOffice使用
3.1 在springboot项目的pom中引入依赖
<!--openoffice--><dependency><groupId>com.artofsolving</groupId><artifactId>jodconverter</artifactId><version>2.2.2</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>juh</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>ridl</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.openoffice</groupId><artifactId>unoil</artifactId><version>4.1.2</version></dependency>
3.2 新增FileConvertUtil 工具类：
package com.tid.common.utils;import com.artofsolving.jodconverter.DefaultDocumentFormatRegistry;
import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.DocumentFormat;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.StreamOpenOfficeDocumentConverter;import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.Files;/*** 文件格式转换工具类*/
public class FileConvertUtil {/*** 默认转换后文件后缀*/private static final String DEFAULT_SUFFIX = "pdf";/*** openoffice的host:你部署openoffice的服务器ip*/private static final String OPENOFFICE_HOST = "192.168.1.6";/*** openoffice的port*/private static final Integer OPENOFFICE_PORT = 8100;/*** 方法描述 office文档转换为PDF(处理本地文件)* @param sourcePath 源文件路径* @param suffix 源文件后缀* @return InputStream 转换后文件输入流*/public static InputStream convertLocaleFile(String sourcePath, String suffix) throws Exception {File inputFile = new File(sourcePath);InputStream inputStream = new FileInputStream(inputFile);return covertCommonByStream(inputStream, suffix);}/*** office文档转换为PDF文件流(处理网络文件)** @param netFileUrl 网络文件路径* @param suffix 文件后缀* @return InputStream 转换后文件输入流*/public static InputStream convertNetFile(String netFileUrl, String suffix) throws Exception {// 创建URLURL url = new URL(netFileUrl);// 试图连接并取得返回状态码URLConnection urlconn = url.openConnection();urlconn.connect();HttpURLConnection httpconn = (HttpURLConnection) urlconn;int httpResult = httpconn.getResponseCode();if (httpResult == HttpURLConnection.HTTP_OK) {InputStream inputStream = urlconn.getInputStream();return covertCommonByStream(inputStream, suffix);}return null;}/*** office文档转换为PDF文件(处理网络文件)** @param netFileUrl 网络文件路径* @param suffix 文件后缀* @param targetPath 目标文件全路径 eg: C:\Users\cvec2022\Desktop\abc.pdf* @return InputStream 转换后文件输入流*/public static File convertNetFileToFile(String netFileUrl, String suffix, String targetPath) throws Exception {// 创建URLURL url = new URL(netFileUrl);// 试图连接并取得返回状态码URLConnection urlconn = url.openConnection();urlconn.connect();HttpURLConnection httpconn = (HttpURLConnection) urlconn;int httpResult = httpconn.getResponseCode();if (httpResult == HttpURLConnection.HTTP_OK) {InputStream inputStream = urlconn.getInputStream();return covertCommonByStream(inputStream, suffix, targetPath);}return null;}/*** 将文件以流的形式转换** @param inputStream 源文件输入流* @param suffix 源文件后缀* @return InputStream 转换后文件输入流*/public static InputStream covertCommonByStream(InputStream inputStream, String suffix) throws Exception {ByteArrayOutputStream out = new ByteArrayOutputStream();OpenOfficeConnection connection = new SocketOpenOfficeConnection(OPENOFFICE_HOST, OPENOFFICE_PORT);connection.connect();DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);DefaultDocumentFormatRegistry formatReg = new DefaultDocumentFormatRegistry();DocumentFormat targetFormat = formatReg.getFormatByFileExtension(DEFAULT_SUFFIX);DocumentFormat sourceFormat = formatReg.getFormatByFileExtension(suffix);converter.convert(inputStream, sourceFormat, out, targetFormat);connection.disconnect();return outputStreamConvertInputStream(out);}/*** 将文件以文件的形式转换** @param inputStream 源文件输入流* @param suffix 源文件后缀* @param targetPath 目标文件全路径 eg: C:\Users\cvec2022\Desktop\abc.pdf* @return File 转换后文件*/public static File covertCommonByStream(InputStream inputStream, String suffix, String targetPath) throws Exception {ByteArrayOutputStream out = new ByteArrayOutputStream();OpenOfficeConnection connection = new SocketOpenOfficeConnection(OPENOFFICE_HOST, OPENOFFICE_PORT);connection.connect();DocumentConverter converter = new StreamOpenOfficeDocumentConverter(connection);DefaultDocumentFormatRegistry formatReg = new DefaultDocumentFormatRegistry();DocumentFormat targetFormat = formatReg.getFormatByFileExtension(DEFAULT_SUFFIX);DocumentFormat sourceFormat = formatReg.getFormatByFileExtension(suffix);converter.convert(inputStream, sourceFormat, out, targetFormat);connection.disconnect();ByteArrayOutputStream baos = (ByteArrayOutputStream) out;return byteArrayToFile(baos.toByteArray(), targetPath);}/*** byte数组转File* @param byteArray 字节数组* @param targetPath 目标路径*/public static File byteArrayToFile(byte[] byteArray, String targetPath) {InputStream in = new ByteArrayInputStream(byteArray);File file = new File(targetPath);String path = targetPath.substring(0, targetPath.lastIndexOf(File.separator));if (!file.exists()) {new File(path).mkdir();}FileOutputStream fos = null;try {fos = new FileOutputStream(file);int len = 0;byte[] buf = new byte[1024];while ((len = in.read(buf)) != -1) {fos.write(buf, 0, len);}fos.flush();} catch (Exception e) {e.printStackTrace();} finally {if (null != fos) {try {fos.close();} catch (IOException e) {e.printStackTrace();}}}return file;}/*** inputStream转File*/public static void inputStreamToFile(InputStream ins, File file) throws IOException {OutputStream os = Files.newOutputStream(file.toPath());int bytesRead = 0;byte[] buffer = new byte[8192];while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {os.write(buffer, 0, bytesRead);}os.close();ins.close();}/*** outputStream转inputStream*/public static ByteArrayInputStream outputStreamConvertInputStream(final OutputStream out) throws Exception {ByteArrayOutputStream baos = (ByteArrayOutputStream) out;return new ByteArrayInputStream(baos.toByteArray());}public static void main(String[] args) throws Exception {convertNetFileToFile("https://file.test.com/test/20230320/88af234acc864bfb91de13c16b0469f8.docx", "docx", "C:\\Users\\cvec2022\\Desktop\\abc.pdf");}
}
3.3 测试结果
以下为上述工具类main方法测试结果：
最终转换结果：如图和word展示的内容一致。
word为：
pdf为：
四、在线预览接口
4.1 接口代码
package com.tid.modules.tid.controller;import com.tid.common.utils.FileConvertUtil;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.io.OutputStream;/*** office文件在线预览接口*/
@RestController
@RequestMapping("/api/file")
@Slf4j
public class OfficeFilePreviewController {/*** 系统文件在线预览接口*/@GetMapping("onlinePreview")public void onlinePreview(String url, HttpServletResponse response) throws Exception {// 获取文件类型String suffix = url.substring(url.lastIndexOf(".") + 1);log.info("suffix {}", suffix);if (suffix.length() == 0) {throw new Exception("文件格式不正确");}if (!suffix.equals("txt") && !suffix.equals("doc") && !suffix.equals("docx") && !suffix.equals("xls")&& !suffix.equals("xlsx") && !suffix.equals("ppt") && !suffix.equals("pptx")) {throw new Exception("文件格式不支持预览");}InputStream in = FileConvertUtil.convertNetFile(url, suffix);OutputStream outputStream = response.getOutputStream();// 创建存放文件内容的byte[]数组byte[] buff = new byte[1024];int n;while ((n = in.read(buff)) != -1) {outputStream.write(buff, 0, n);}outputStream.flush();outputStream.close();in.close();}
}4.2 接口测试
测试OK
补充：jodconverter2.2.2下载地址
请点击下载即可jodconverter2.2.2下载
END
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