Java通过openoffice将下载的文件转成pdf供前端预览
一、下载安装openoffice
1、进入openoffice官网http://www.openoffice.org/download/index.html下载最新版RPM安装包Apache_OpenOffice_4.1.6_Linux_x86-64_install-rpm_zh-CN.tar.gz
2、解压下载的文件
tar zxxvf Apache_OpenOffice_4.1.6_Linux_x86-64_install-rpm_zh-CN.tar.gz3、进入zh-CN/RPMS目录
cd zh-CN/RPMS4、安装所有rpm文件
rpm -ivh *.rpm5、进入desktop-integration目录
desktop-integration6、安装openoffice4.1.6-redhat-menus-4.1.6-9790.noarch.rpm，不同版本该文件名可能不同
rpm -ivh openoffice4.1.6-redhat-menus-4.1.6-9790.noarch.rpm可能会出现如下问题：
file /usr/bin/soffice from install of openoffice4.1.6-redhat-menus-4.1.6-9790.noarch conflicts with file from package libreoffice-core-1:4.3.7.2-5.el7.x86_64
意思是：包libreoffice-core-1:4.3.7.2-5.el7.x86_64冲突，执行以下命令卸载该包，然后再执行一次上面的安装命令即可。
yum -y remove libreoffice-core-1:4.3.7.2-5.el7.x86_647、启动openoffice服务，完成安装后，默认安装到 /opt/openoffice4 目录下，进入该目录下的program目录，执行命令进行后台启动
nohup soffice -headless -accept="socket,host=127.0.0.1,port=8100;urp;" -nofirststartwizard &可通过 ps ef|grep openoffice 查看 进程是否启动。
二、编写Java代码
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.DigestUtils;
import com.artofsolving.jodconverter.DocumentConverter;
import com.artofsolving.jodconverter.openoffice.connection.OpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.connection.SocketOpenOfficeConnection;
import com.artofsolving.jodconverter.openoffice.converter.OpenOfficeDocumentConverter;
@Component
public class DocConverter {
private static final Logger log = LoggerFactory.getLogger(DocConverter.class);
@Value("${ccf.jodconverter.port}")
private String port;
@Value("${ccf.doc.dir}")
private String docDir;
@Value("${ccf.pdf.dir}")
private String pdfDir;
@Value("${ccf.doc.request.url}")
private String docRequestUrl;
@Value("${ccf.doc.download.url.reg}")
private String reg;
public DocResponse officeToPdf(String url) {
if(StringUtils.isEmpty(url)) {
return DocResponse.fail(505, "文档地址不能为空！");
}
Pattern pattern = Pattern.compile(reg);
Matcher matcher = pattern.matcher(url);
if(!matcher.matches()) {
return DocResponse.fail(504, "文档格式不支持，暂只支持[pdf、doc、docx、ppt、pptx、xls、xlsx]！");
}
String fileName = DigestUtils.md5DigestAsHex(url.getBytes());
File pdfFile = new File(pdfDir+File.separator+fileName+".pdf");
if(pdfFile.exists()) {
return DocResponse.success(docRequestUrl+pdfFile.getName());
}
DocResponse downloadResponse = downloadByNIO(url);
if(downloadResponse.getCode() != 0) {
return downloadResponse;
}
DocResponse response = doc2pdf(downloadResponse.getMessage());
return response;
}
private DocResponse downloadByNIO(String url) {
String suffixName = url.substring(url.lastIndexOf("."), url.length());
//将下载地址转换唯一的字符串
String fileName = DigestUtils.md5DigestAsHex(url.getBytes())+suffixName;
File file = new File(docDir+File.separator+fileName);
if(!file.exists()) {
long start = System.currentTimeMillis();
log.info("***开始下载文件：{}***",url);
try (InputStream ins = new URL(url).openStream()) {
Path target = Paths.get(docDir,fileName);
Files.createDirectories(target.getParent());
Files.copy(ins, target, StandardCopyOption.REPLACE_EXISTING);
} catch(FileNotFoundException e) {
log.error("***文件不存在，无法下载：{}",url);
return DocResponse.fail(404, "文件不存在，无法预览："+url);
}catch (IOException e) {
e.printStackTrace();
log.error("***文件下载失败：{}***",url);
return DocResponse.fail(500, "件下载失败："+url);
}finally {
log.info("***文件下载完成，耗时：{} ms***",(System.currentTimeMillis()-start));
}
}
return DocResponse.success(docDir+File.separator+fileName);
}
/**
* 转为PDF
*
* @param file
*/
private DocResponse doc2pdf(String fileString) {
String fileName = fileString.substring(fileString.lastIndexOf(File.separator), fileString.lastIndexOf("."));
File docFile = new File(fileString);
File pdfFile = new File(pdfDir+fileName + ".pdf");
if (docFile.exists()) {
if (!pdfFile.exists()) {
long start = System.currentTimeMillis();
OpenOfficeConnection connection = new SocketOpenOfficeConnection(Integer.valueOf(port));
try {
connection.connect();
DocumentConverter converter = new OpenOfficeDocumentConverter(connection);
converter.convert(docFile, pdfFile);
log.info("***转换成功，PDF输出：{}，总耗时：{}***",pdfFile.getPath(),System.currentTimeMillis()-start);
} catch (java.net.ConnectException e) {
e.printStackTrace();
log.error("****转换器异常，openoffice服务未启动！****");
return DocResponse.fail(501, "转换器异常，openoffice服务未启动！");
} catch (com.artofsolving.jodconverter.openoffice.connection.OpenOfficeException e) {
e.printStackTrace();
log.error("***转换器异常，读取转换文件[{}]失败!***",fileString);
return DocResponse.fail(502, "转换器异常，读取转换文件["+fileString+"]失败!");
} catch (Exception e) {
e.printStackTrace();
log.error("***转换器发生未知异常!***");
return DocResponse.fail(503, "转换器发生未知异常!");
}finally {
// close the connection
connection.disconnect();
}
} else {
log.info("***对应pdf文件[{}]已存在***",pdfFile.getPath());
}
} else {
log.error("***文档[{}]不存在，无法转换！***",fileString);
return DocResponse.fail(404, "文档不存在，无法转换!");
}
return DocResponse.success(docRequestUrl+pdfFile.getName());
}
}
三、完整源码下载https://download.csdn.net/download/ccf199201261/11827702