JAVA 实现Excel 转换PDF(开源) 且效果较好的版本

package cn.com.toyota.sales.dist.scd.utils;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.InputStream;


/******************************************************** 

 * Class名  Excle2PDF                                     

 * 机能概要： Excel 另存为 PDF                              

 * 调用libreoffice另存  需要安装libreoffice                 

 ********************************************************/
public class Excle2PDF {

    private static final Logger logger = LoggerFactory.getLogger(Excle2PDF.class);

    /**
     * 另存为PDF
     * @param filePath  文件全路径
     * @param outPath   输出路径
     * @return
     */
    public static void save2PDF (String filePath , String outPath)  {
        long start = System.currentTimeMillis();
        logger.info("start:{} ms", start);
        String command = "";
        String osName = System.getProperty("os.name");
        if (osName.contains("Windows")) {
            command = "soffice --headless --convert-to pdf "+ "d:" + filePath + " --outdir " + "d:" + outPath;
            exec(command,filePath);
        }else {
            command = "libreoffice7.2 --headless --invisible  --convert-to pdf " +filePath + " --outdir "  +outPath;
            exec(command,filePath);
//            filePath.replace("excel", "pdf");
//            filePath.replace(".xlsx", ".pdf");
//            File file = new File( filePath);
//            while (!file.exists()) {
//                System.out.println("文件出错 正在重新生成 = " + filePath);
//                exec(command, filePath);
//            }
        }
        long end = System.currentTimeMillis();
        logger.info("end:{} ms", end);
        logger.info("用时:{} ms", end - start);
    }



    public static boolean exec(String command, String filePath) {
        Process process;// Process可以控制该子进程的执行或获取该子进程的信息
        try {
            process = Runtime.getRuntime().exec(command);// exec()方法指示Java虚拟机创建一个子进程执行指定的可执行程序，并返回与该子进程对应的Process对象实例。
            // 下面两个可以获取输入输出流
            InputStream errorStream = process.getErrorStream();
            InputStream inputStream = process.getInputStream();
        } catch (IOException e) {
            logger.error(" exec {} error", command, e);
            return false;
        }

        int exitStatus = -1;
        try {
            exitStatus = process.waitFor();// 等待子进程完成再往下执行，返回值是子线程执行完毕的返回值,返回0表示正常结束
        } catch (InterruptedException e) {
            logger.error("InterruptedException  exec {}", command, e);
            return false;
        }

        if (exitStatus != 0) {
            logger.error("exec cmd exitStatus  error{} " +command, exitStatus);
            logger.error("生成错误的pdf " +filePath);
            process.destroy(); // 销毁子进程
            process = null;
        } else {
            logger.info("exec cmd exitStatus sucess{} "+command, exitStatus);
        }

        process.destroy(); // 销毁子进程
        process = null;

        return true;
    }
}