Jacob操作ppt

自作多情 提交于 2020-01-01 21:56:47

前几天使用Apache 的POI操作ppt,后来发现转成的图片出现乱码,而且处理了之后,还会有遗留

因此决定换一种处理方式

Jacob 是 JAVA-COM Bridge的缩写,是一个中间件,能够提供自动化访问MS系统下COM组件和Win32 libraries的功能。

1.准备

(1)安装MS Office

(2)使用spring boot 框架

(3)pom.xml 添加 jacob 依赖

<dependency>
     <groupId>net.sf.jacob-project</groupId>
     <artifactId>jacob</artifactId>
     <version>1.14.3</version>
</dependency>

(4)安装dll

在https://mvnrepository.com/ 查询jacob,选择第一个

选择适合自己机器的dll文件

将下载下来的dll文件放在

C:\Program Files\Java\jdk1.8.0_151\bin
C:\Program Files\Java\jdk1.8.0_151\jre\bin
C:\WINDOWS\system32
C:\Program Files\Java\jre1.8.0_151\bin
其实只要在 C:\WINDOWS\system32下就可以找到了

2.使用

  • MS系统提供的COM组件
COM组件对象ID
MS Word Word.Application
MS Excel Excel.Application
MS Powerpoint Powerpoint.Application
 

重要的类和方法

JacobObject:用于Java程序MS下的COM进行通信,创建标准的API框架

ComThread:初始化COM组件线程,释放线程,对线程进行管理

Dispatch:调度处理类,封装了操作来从而操作Office,并表示不同MS级别调度对象

  Dispatch.get(dispatch, String name);获取对象属性

  Dispatch.put(dispatch, String name, Object value);设置对象属性

  Dispatch.call(dispatch, String name, Object… args);调用对象方法

ActiveXComponent : 创建COM组件

Variant : 与COM通讯的参数或者返回值

可以参考VBA API,使用Jacob操作COM组件 https://docs.microsoft.com/en-us/office/vba/api/powerpoint.slides.insertfromfile 查看 

处理过程

  初始化ComThread——》初始化应用——》设置应用属性——》获取应用属性或对象,设置属性参数——》调用属性对应的方法

(1)ppt转pdf

public BackRS ppt2Pdf(String sourcePath, String destPath,BackRS rs){
        ActiveXComponent ppt = null;
        Dispatch presentations = null;
        try {
            ComThread.InitMTA(true);
            ppt = new ActiveXComponent("PowerPoint.application");
            Dispatch.put(ppt.getObject(), "DisplayAlerts", new Variant(false));

            presentations = ppt.invokeGetComponent("Presentations")
                    .invokeGetComponent("Open", new Variant(sourcePath));

            Dispatch.invoke(presentations,
                    "SaveAs",
                    Dispatch.Method,
                    new Object[]{destPath, new Variant(32)},
                    new int[1]);
            rs.setFlag(true);
            rs.setMsg("pdf successfully converted.");
            rs.setPath(destPath);
            rs.setFileName(sourcePath);
        } catch (Exception e) {
            rs.setFlag(false);
            rs.setMsg(e.getMessage());
        } finally {
            try {
                if (ppt != null) {
                    ppt.invoke("Quit");
                }
            } catch (Exception e) {
                rs.setFlag(false);
                rs.setMsg(e.getMessage());
            } finally {
                if (presentations != null)
                    presentations.safeRelease();
                if (ppt != null)
                    ppt.safeRelease();
                ComThread.Release();
            }
        }
        return rs;
    }

(2)ppt按页保存图片

public static final int PPT_SAVEAS_JPG = 17;

    public BackRS converter(String fileName){

        BackRS rs = new BackRS();
        ActiveXComponent ppt = null;
        Dispatch presentations = null;
        String source = fileName;
        File file = new File(source);
        if (!file.exists()) {
            rs.setFlag(false);
            rs.setMsg("转换文件不存在");
            return rs;
        }
        String filePath = file.getParent()+File.separator;
        String dest = filePath + getFileNameNoEx(file.getName())+"_JPG";
        File destPath = new File(dest);
        if (!destPath.exists()) {
            destPath.mkdir();
        }
        try {
            ComThread.InitMTA(true);
            ppt = new ActiveXComponent("PowerPoint.application");

            Dispatch.put(ppt.getObject(), "DisplayAlerts", new Variant(false));
            presentations = ppt.invokeGetComponent("Presentations").invokeGetComponent("Open", new Variant(source));

            saveAs(presentations, dest, PPT_SAVEAS_JPG);
            rs.setFlag(true);
            rs.setMsg("Image successfully converted.");
            rs.setPath(dest);
            rs.setFileName(fileName);
        } catch (Exception e) {
            rs.setFlag(false);
            rs.setMsg(e.getMessage());
        } finally {
            try {
                if (ppt != null) {
                    ppt.invoke("Quit");
                }
            } catch (Exception e) {
                rs.setFlag(false);
                rs.setMsg(e.getMessage());
            } finally {
                if (presentations != null)
                    presentations.safeRelease();
                if (ppt != null)
                    ppt.safeRelease();
                ComThread.Release();
            }
        }
        return rs;
    }

    public void saveAs(Dispatch presentation, String saveTo,
                       int ppSaveAsFileType)throws Exception {
        Dispatch.call(presentation, "SaveAs", saveTo, new Variant(
                ppSaveAsFileType));
    }

(3)ppt合并

public void merge(String outPutPPTPath, List<String> mergePPTPathList) {
        // 启动 office PowerPoint程序
        ActiveXComponent pptApp = null;
        Dispatch presentations = null;
        Dispatch outputPresentation;

        try {
            ComThread.InitMTA(true);
            pptApp = new ActiveXComponent("PowerPoint.Application");
            Dispatch.put(pptApp, "Visible", new Variant(true));
            presentations = pptApp.getProperty("Presentations").toDispatch();

            File file = new File(outPutPPTPath);
            if (file.exists()) {
                file.delete();
            }
            file.createNewFile();
            // 打开输出文件
            outputPresentation = Dispatch.call(presentations, "Open", outPutPPTPath, false,
                    false, true).toDispatch();

            // 循环添加合并文件
            for (String mergeFile : mergePPTPathList) {
                Dispatch mergePresentation = Dispatch.call(presentations, "Open", mergeFile, false,
                        false, true).toDispatch();

                Dispatch mergeSildes = Dispatch.get(mergePresentation, "Slides").toDispatch();
                int mergePageNum = Integer.parseInt(Dispatch.get(mergeSildes, "Count").toString());

                // 关闭合并文件
                Dispatch.call(mergePresentation, "Close");

                Dispatch outputSlides = Dispatch.call(outputPresentation, "Slides").toDispatch();
                int outputPageNum = Integer.parseInt(Dispatch.get(outputSlides, "Count").toString());

                // 追加待合并文件内容到输出文件末尾
                Dispatch.call(outputSlides, "InsertFromFile", mergeFile, outputPageNum, 1, mergePageNum);
            }
            // 保存输出文件,关闭退出PowerPonit.
            Dispatch.call(outputPresentation, "Save");
            Dispatch.call(outputPresentation, "Close");

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (pptApp != null) {
                    pptApp.invoke("Quit");
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (presentations != null)
                    presentations.safeRelease();
                if (pptApp != null)
                    pptApp.safeRelease();
                ComThread.Release();
            }
        }
    }

  将mergePPTPathList 中的文件,追加到 outPutPPTPath文件中

  下面的语句

Dispatch.call(outputSlides, "InsertFromFile", mergeFile, outputPageNum, 1, mergePageNum);
InsertFromFile( _FileName_, _Index_, _SlideStart_, _SlideEnd_ )

 参考这个原型,可以实现追加指定的第umPage页面

Dispatch.call(outputSlides, "InsertFromFile",mergeFile, outputPageNum, umPage, umPage);

说明:

  (1)出现错误 Can't get object clsid from progid

    检查 dll文件都在指定位置,但还是报错

    后来发现原来参考的其他人的文章Jacob调用WPS将Office文件转为PDF文件,对象ID不正确

    其中 ppt = new ActiveXComponent("KWPP.Application");改为 ppt = new ActiveXComponent("PowerPoint.application");

  (2)Can’t load IA 32-bit .dll on a AMD 64-bit platform 

    出现这个报错是因为使用的jacob.dll和系统不匹配,把32位的用在了64位的系统上了,几位的系统就用几位jacob.dll

  (3)如果不想用Office想用WPS,不能安装极小安装包

 

 

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