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

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<br>
*
* @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<br>

4000
* 如我的OpenOffice.org 3安装在：C:/Program Files (x86)/OpenOffice.org 3<br>
*
* @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<br>
*
* @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"<br>
*
* @param inputFilePath
* @return
*/
public static String getPostfix(String inputFilePath) {
return inputFilePath.substring(inputFilePath.lastIndexOf(".") + 1);
}

}