libreoffice下载地址
https://zh-cn.libreoffice.org/get-help/install-howto/linux/
安装
解压
tar -xvf xxxx.tar.gz
进入解压执行命令
yum install ./LibreOffice_4.x.x_Linux_x86_rpm/RPMS/*.rpm
然后在/opt 下会有文件夹/opt/liberofficex.x
(第一种) java调用
++++++++++++第一种方法，不太推荐++++++++++++++++
依赖
<dependency>
<groupId>com.github.livesense</groupId>
<artifactId>jodconverter-core</artifactId>
<version>1.0.5</version>
</dependency>
import org.artofsolving.jodconverter.OfficeDocumentConverter;
import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeManager;
import java.io.File;
public class LibreOfficeWordToPDFUtil {
//需要解决线程安全问题，防止端口重新启动报错被占用加上synchronized
public static synchronized void libreOfficeToPDF(File inputfile, File outputfile) {
// libreOffice的安装目录
String LibreOffice_HOME = "/opt/libreoffice7.1";
DefaultOfficeManagerConfiguration configuration = new DefaultOfficeManagerConfiguration();
configuration.setOfficeHome(new File(LibreOffice_HOME));
// 端口号
configuration.setPortNumber(8100);
configuration.setTaskExecutionTimeout(1000 * 60 * 20L);
// 设置任务执行超时为20分钟
configuration.setTaskQueueTimeout(1000 * 60 * 60 * 24L);
// 设置任务队列超时为24小时
OfficeManager officeManager = configuration.buildOfficeManager();
officeManager.start();
OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);
converter.getFormatRegistry();
try {
converter.convert(inputfile, outputfile);
} catch (Exception e) {
e.printStackTrace();
} finally {
officeManager.stop();
}
}
}
(第二种 推荐) java调用Linux命令转pdf
不需要专门依赖，经测试直接调用Linux命令不需要synchronized同步，反应更快
参数参考（文件名必须要去掉中间的空格字符）
source=“/home/pdfs/first.docx”
targetDir=“/home/to”
结果->目录下生成pdf文件 /home/to/first.pdf
方法的status正常输出为0
public static String doc2pdf(String source,String targetDir){
String cmd="libreoffice7.1 --convert-to pdf:writer_pdf_Export "+source+" --outdir "+targetDir;
Integer status=null;
Process process=null;
try {
process=Runtime.getRuntime().exec(cmd);
status = process.waitFor();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}finally {
process.destroy();
}
return "ok NOT synchronized"+status;
}
java远程连接Linux执行命令(少数情况)
依赖
<dependency>
<groupId>ch.ethz.ganymed</groupId>
<artifactId>ganymed-ssh2</artifactId>
<version>build210</version>
</dependency>
小案例：测试Linux里 jpg 和 png 的文件数量
参数说明 like可自行设置，这里没用上这个参数
import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;
import ch.ethz.ssh2.StreamGobbler;
public void connectLinux(String like,String hostname, String username,String password){
Connection con=null;
try {
con = new Connection(hostname);
con.connect();
//登录
boolean islog = con.authenticateWithPassword(username, password);
// 是否登录成功
if (islog== false) {
throw new IOException("登录失败");
}
if (con != null) {
Session session = con.openSession();
//一个session只能执行一条命令，多条可拼接"\n"
//如果要分开多次命令,可再一次openSession
//Session s2=con.openSession();
//s2.execCommand("ps -ef|grep java*");
session.execCommand("cd /home/ftp\n ls -lR ./|grep '.jpg' |wc -l\n ls -lR ./|grep '.png' |wc -l");
InputStream stdout = new StreamGobbler(session.getStdout());
BufferedReader br = new BufferedReader(new InputStreamReader(stdout));
while (true) {
String line = br.readLine();
if (line == null) {
break;
}
System.out.println(line+"个======文件");
}
System.out.println("ExitCode：" + session.getExitStatus());
}
} catch (Exception e) {
e.printStackTrace();
}finally{
// 关闭连接
session.close();
con.close();
}
}
linux安装windows中文字体解决pdf乱码
复制C:\windows\Fonts里的字体到linux下的/usr/share/fonts/chinese
直接把文件夹复制过去然后把Fonts改名chinese
linux下若没有目录就创建目录
进入chinese
执行
sudo fc-cache -fv
如果 fc-cache 未找到命令
yum install lsb
生效
source /etc/profile
查看是否有了中文字体
fc-list |wc -l
fc-list :lang=zh-cn | sort
pdf加水印
依赖
<dependency>
<groupId>com.itextpdf.tool</groupId>
<artifactId>xmlworker</artifactId>
<version>5.5.10</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.10</version>
</dependency>
import com.itextpdf.text.Element;
import com.itextpdf.text.pdf.*;
import java.io.FileOutputStream;
public class PDFWaterUtil {
public static void addPDFWater(String pdfFilePath, String outputFilePath) {
try {
// 原PDF文件
PdfReader reader = new PdfReader(pdfFilePath);
// 输出的PDF文件内容
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(outputFilePath));
BaseFont baseFont = BaseFont.createFont("C:/Windows/Fonts/SIMYOU.TTF",BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED);
// BaseFont baseFont = BaseFont.createFont("/usr/share/fonts/chinese/SIMYOU.TTF",BaseFont.IDENTITY_H,BaseFont.NOT_EMBEDDED);
//BaseFont baseFont = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);
PdfGState gs = new PdfGState();
// 设置透明度
gs.setFillOpacity(0.3f);
gs.setStrokeOpacity(0.4f);
//页数
int totalPage = reader.getNumberOfPages() + 1;
for (int i = 1; i < totalPage; i++) {
// 内容上层
// PdfContentByte content = stamper.getOverContent(i);
// 内容下层
PdfContentByte content = stamper.getUnderContent(i);
content.beginText();
// 字体添加透明度
content.setGState(gs);
// 添加字体大小等
content.setFontAndSize(baseFont, 50);
// 添加范围
content.setTextMatrix(70, 200);
// 具体位置 内容 旋转多少度 共360度
content.showTextAligned(Element.ALIGN_CENTER, "logotext", 100, 0, 300);
content.showTextAligned(Element.ALIGN_CENTER, "logotext", 200, 80, 300);
content.showTextAligned(Element.ALIGN_CENTER, "logotext", 300, 180, 300);
content.showTextAligned(Element.ALIGN_CENTER, "logotext", 400, 280, 300);
content.endText();
}
// 关闭
stamper.close();
reader.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
