背景

项目中需要在线预览文档，且文档格式有word、excel和ppt等多种Office格式的
所以需要一中能在linux上运行的在线转换工具，经过github的查找，发现LibreOffice的方式，以下介绍以下具体方法

准备环境

安装LibreOffice

yum install libreoffice

文件有点大，需要安装一段时间

安装字体

字体一定需要安装，否则会出现乱码问题

**
1、下载字体

yum groupinstall "fonts"

2、修改字符集

vim /etc/locale.conf

将LANG="en_US.UTF-8"修改成LANG="zh_CN.UTF-8"

3、重启

reboot

Java实现转换的Demo

代码

LibreOfficeCommandWordService.java

package top.flksweb;

import java.io.*;

public class LibreOfficeCommandWordService {
    
    //需要根据实际情况，查找LibreOffice安装的实际目录，
    //Mac下是默认安装到/usr/local/bin，
    //CentOS下默认安装在/usr/bin
    private final static String sofficeDir ="/usr/local/bin";

    public void word2pdf(String inPath, String outPath) throws Exception {
        if (!new File(inPath).exists()) {
            throw new FileNotFoundException();
        }
        String command = String.format("%s/soffice --convert-to pdf:writer_pdf_Export %s --outdir %s", sofficeDir, inPath, outPath);
        String output = this.executeCommand(command);
//        log.info("exec command:[{}]\noutput: [{}]", command, output);
    }

    protected String executeCommand(String command) throws IOException, InterruptedException {
        StringBuffer output = new StringBuffer();
        Process p;
        p = Runtime.getRuntime().exec(command);
        p.waitFor();
        try (
                InputStreamReader inputStreamReader = new InputStreamReader(p.getInputStream(), "UTF-8");
                BufferedReader reader = new BufferedReader(inputStreamReader)
        ) {
            String line = "";
            while ((line = reader.readLine()) != null) {
                output.append(line + "\n");
            }
        }
        p.destroy();
        return output.toString();
    }
}

测试方法

import java.io.File;

public class Office2Pdf {

    public static void main(String[] args) throws Exception {

        LibreOfficeCommandWordService officeCommandWordService = new LibreOfficeCommandWordService();
        File file = new File("/Users/franks/Documents/ESB技术选型报告.docx");
        File outFile = new File("/Users/franks/Documents");
        officeCommandWordService.word2pdf(file.getAbsolutePath(), outFile.getAbsolutePath());
    }
}