java引入openoffice，实现在线预览功能

注：代码相关openoffice  jar包下载地址：jar包地址
注:欢迎关注vue+springboot+shiro开发的项目 官网地址：进入官网

package com.sk.controller.onlineread;


import net.sf.json.JSONObject;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.artofsolving.jodconverter.OfficeDocumentConverter;
import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeManager;
import org.hibernate.criterion.Criterion;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.Date;
import java.util.List;
import java.util.regex.Pattern;


@Controller
@RequestMapping("/onlineread")
public class OnlineReadController{

    private static final Log LOG = LogFactory.getLog(OnlineReadController.class);

    /**
     * 预览
     * @param session
     * @param path
     * @return
     */
    @RequestMapping(params = "yulan")
    @ResponseBody
    public  void yulan(HttpSession session,HttpServletResponse response,HttpServletRequest request,String path,String filename)throws Exception{
        File file = OnlineReadController.openOfficeToPDF(path);
        BufferedInputStream br = new BufferedInputStream(new FileInputStream(file));
        byte[] buf = new byte[1024];
        int len = 0;
        response.reset(); // 非常重要
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition",
                "inline; filename=" + java.net.URLEncoder.encode(file.getName(), "UTF-8"));

        OutputStream out = response.getOutputStream();
        while ((len = br.read(buf)) != -1)
            out.write(buf, 0, len);
        br.close();
        out.close();
    }

    /**
     * 使Office2003-2007全部格式的文档(.doc|.docx|.xls|.xlsx|.ppt|.pptx) 转化为pdf文件

     *
     * @param inputFilePath
     *            源文件路径，如："e:/test.docx"
     * @return
     */
    public static File openOfficeToPDF(String inputFilePath)throws Exception {
        return office2pdf(inputFilePath);
    }

    /**
     * 根据操作系统的名称，获取OpenOffice.org 3的安装目录

     * 如我的OpenOffice.org 3安装在：C:/Program Files (x86)/OpenOffice.org 3

     *
     * @return OpenOffice.org 3的安装目录
     */
    public static String getOfficeHome() {
        String osName = System.getProperty("os.name");
        System.out.println("操作系统名称:" + osName);
        if (Pattern.matches("Linux.*", osName)) {
            return "/opt/openoffice.org3";
        } else if (Pattern.matches("Windows.*", osName)) {
            return "C:\\Program Files (x86)\\OpenOffice 4";
        } else if (Pattern.matches("Mac.*", osName)) {
            return "/Applications/OpenOffice.org.app/Contents/";
        }
        return null;
    }

    /**
     * 连接OpenOffice.org 并且启动OpenOffice.org
     *
     * @return
     */
    public static OfficeManager getOfficeManager()throws Exception {
        DefaultOfficeManagerConfiguration config = new DefaultOfficeManagerConfiguration();
        // 设置OpenOffice.org 3的安装目录
        config.setOfficeHome(getOfficeHome());
        // 启动OpenOffice的服务
        OfficeManager officeManager = config.buildOfficeManager();
        officeManager.start();
        return officeManager;
    }

    /**
     * 转换文件
     *
     * @param inputFile
     * @param outputFilePath_end
     * @param inputFilePath
     * @param converter
     */
    public static File converterFile(File inputFile, String outputFilePath_end, String inputFilePath,
                                     OfficeDocumentConverter converter)throws Exception {
        File outputFile = new File(outputFilePath_end);
        // 假如目标路径不存在,则新建该路径
        if (!outputFile.getParentFile().exists()) {
            outputFile.getParentFile().mkdirs();
        }
        //判断转换文件的编码方式，如果不是UTF-8，则改为UTF-8编码
        converter.convert(inputFile, outputFile);
        System.out.println("文件：" + inputFilePath + "\n转换为\n目标文件：" + outputFile + "\n成功!");
        return outputFile;
    }

    /**
     * 使Office2003-2007全部格式的文档(.doc|.docx|.xls|.xlsx|.ppt|.pptx) 转化为pdf文件

     *
     * @param inputFilePath
     *            源文件路径，如："e:/test.docx"
     * @return
     */
    public static File office2pdf(String inputFilePath) throws Exception {
        OfficeManager officeManager = null;
        try {
            if (StringUtils.isEmpty(inputFilePath)) {
                LOG.info("输入文件地址为空，转换终止!");
                return null;
            }

            File inputFile = new File(inputFilePath);
            // 转换后的文件路径
            String outputFilePath_end = getOutputFilePath(inputFilePath);

            if (!inputFile.exists()) {
                LOG.info("输入文件不存在，转换终止!");
                return null;
            }

            // 获取OpenOffice的安装路劲
            officeManager = getOfficeManager();
            // 连接OpenOffice
            OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);

            return converterFile(inputFile, outputFilePath_end, inputFilePath, converter);
        } catch (Exception e) {
            LOG.error("转化出错!", e);
        } finally {
            // 停止openOffice
            if (officeManager != null) {
                officeManager.stop();
            }
        }
        return null;
    }

    /**
     * 获取输出文件
     *
     * @param inputFilePath
     * @return
     */
    public static String getOutputFilePath(String inputFilePath) {
        String outputFilePath = inputFilePath.replaceAll("." + getPostfix(inputFilePath), ".pdf");
        return outputFilePath;
    }

    /**
     * 获取inputFilePath的后缀名，如："e:/test.pptx"的后缀名为："pptx"

     *
     * @param inputFilePath
     * @return
     */
    public static String getPostfix(String inputFilePath) {
        return inputFilePath.substring(inputFilePath.lastIndexOf(".") + 1);
    }

}