使用Aspose.Slides 在 Java 中锁定和解锁PPT内容形状

柔情只为你懂 2023-10-15 08:04 85阅读 0赞

本文为您提供了在 Java 中锁定 PowerPoint PPT 形状的综合指南。因此，您可以保护 PowerPoint 演示文稿的内容。出于多种原因，锁定形状可能很有用，包括防止意外更改、保护品牌标识、保持布局完整性等。那么，让我们继续看看如何在借助aspose.slides在 Java 演示文稿中锁定或解锁形状。 **(qun:761297826)**

**[Aspose.Slides ][Aspose.Slides]**是一款 PowerPoint管理API，用于读取，编写，操作和转换PowerPoint幻灯片的独立API，可将PowerPoint转换为PDF，PDF/A，XPS，TIFF，HTML，ODP和其他PowerPoint格式。

[Aspose API][]支持流行文件格式处理，并允许将各类文档导出或转换为固定布局文件格式和最常用的图像/多媒体格式。

##### **一、用于锁定 PowerPoint PPT 中形状的 Java 库** #####

要锁定和解锁 PowerPoint 演示文稿，我们将使用Aspose.Slides for Java。它是一个功能丰富的 Java 库，用于创建和操作演示文稿文档。您可以下载该库或使用pom.xml中的以下依赖项进行安装。

>     <dependency>
>     <groupId>com.aspose</groupId>
>     <artifactId>aspose-slides</artifactId>
>     <version>23.7</version>
>     <classifier>jdk16</classifier>
>     </dependency>

##### **二、Java 中的 PowerPoint PPT 锁定形状** #####

1.  PowerPoint 演示文稿由多种元素组成，例如文本、图像、音频等。Aspose.Slides for Java 将每个元素视为 Shape 或从 Shape 派生的 abject。因此，如果锁定演示文稿中的所有形状，就可以防止 PPT 被修改。
    
    Aspose.Slides for Java 将 PowerPoint 形状分为以下类型：
    
     *  自动形状
     *  团体形态
     *  连接器
     *  镜框
     *  图形对象
    
    现在让我们看看如何用 Java 锁定 PowerPoint PPT 中的形状。
    
     *  **首先，使用Presentation**类加载PPT/PPTX 文件。
     *  **然后，使用Presentation.getSlides()**方法获取演示文稿中的幻灯片。
     *  对于每张幻灯片，使用**ISlide.getShapes()**方法访问其形状。
     *  对于集合中的每个形状，执行以下步骤：
        
         *  检查形状的类型。
         *  根据形状的类型使用合适的锁。
     *  **最后，使用Presentation.save(String, SaveFormat)**方法保存演示文稿。

以下代码示例演示如何使用 Java 锁定 PowerPoint PPT 中的形状。

>     try {
>     //Load presentation file
>     Presentation pTemplate = new Presentation("presentation.pptx");
>     
>     //ISlide object for accessing the slides in the presentation
>     ISlide slide = pTemplate.getSlides().get_Item(0);
>     
>     //IShape object for holding temporary shapes
>     IShape shape;
>     
>     //Traverse through all the slides in the presentation
>     for (int slideCount = 0; slideCount < pTemplate.getSlides().size(); slideCount++) {
>     slide = pTemplate.getSlides().get_Item(slideCount);
>     
>     //Traverse through all the shapes in the slides
>     for (int count = 0; count < slide.getShapes().size(); count++) {
>     shape = slide.getShapes().get_Item(count);
>     
>     //if shape is auto shape
>     if (shape instanceof IAutoShape) {
>     //Type casting to Auto shape and getting auto shape lock
>     IAutoShape Ashp = (IAutoShape) shape;
>     IAutoShapeLock AutoShapeLock = (IAutoShapeLock) Ashp.getShapeLock();
>     
>     //Apply shape locks
>     AutoShapeLock.setPositionLocked(true);
>     AutoShapeLock.setSelectLocked(true);
>     AutoShapeLock.setSizeLocked(true);
>     }
>     
>     //if shape is group shape
>     else if (shape instanceof IGroupShape) {
>     //Type casting to group shape and getting group shape lock
>     IGroupShape Group = (IGroupShape) shape;
>     IGroupShapeLock groupShapeLock = (IGroupShapeLock) Group.getShapeLock();
>     
>     //Apply shape locks
>     groupShapeLock.setGroupingLocked(true);
>     groupShapeLock.setPositionLocked(true);
>     groupShapeLock.setSelectLocked(true);
>     groupShapeLock.setSizeLocked(true);
>     }
>     
>     //if shape is a connector
>     else if (shape instanceof IConnector) {
>     //Type casting to connector shape and getting connector shape lock
>     IConnector Conn = (IConnector) shape;
>     IConnectorLock ConnLock = Conn.getShapeLock();
>     
>     //Apply shape locks
>     ConnLock.setPositionMove(true);
>     ConnLock.setSelectLocked(true);
>     ConnLock.setSizeLocked(true);
>     }
>     
>     //if shape is picture frame
>     else if (shape instanceof IPictureFrame) {
>     //Type casting to pitcture frame shape and getting picture frame shape lock
>     IPictureFrame Pic = (IPictureFrame) shape;
>     IPictureFrameLock PicLock = (IPictureFrameLock) Pic.getShapeLock();
>     
>     //Apply shape locks
>     PicLock.setPositionLocked(true);
>     PicLock.setSelectLocked(true);
>     PicLock.setSizeLocked(true);
>     }
>     }
>     }
>     //Save the presentation file
>     pTemplate.save("ProtectedSample.pptx", SaveFormat.Pptx);
>     } catch (Exception e) {
>     }

##### **三、在 Java 中解锁 PowerPoint 形状** #####

要解锁 PowerPoint PPT 中锁定的形状，只需将其值设置为*false*来关闭锁定。值得注意的是，使用 Aspose.Slides for Java 锁定的形状无法使用任何其他库解锁。

以下代码示例演示如何使用 Java 解锁 PPTX 文件中的形状。

>     try {
>     //Load presentation file
>     Presentation pTemplate = new Presentation("presentation.pptx");
>     
>     //ISlide object for accessing the slides in the presentation
>     ISlide slide = pTemplate.getSlides().get_Item(0);
>     
>     //IShape object for holding temporary shapes
>     IShape shape;
>     
>     //Traverse through all the slides in the presentation
>     for (int slideCount = 0; slideCount < pTemplate.getSlides().size(); slideCount++) {
>     slide = pTemplate.getSlides().get_Item(slideCount);
>     
>     //Traverse through all the shapes in the slides
>     for (int count = 0; count < slide.getShapes().size(); count++) {
>     shape = slide.getShapes().get_Item(count);
>     
>     //if shape is auto shape
>     if (shape instanceof IAutoShape) {
>     //Type casting to Auto shape and getting auto shape lock
>     IAutoShape Ashp = (IAutoShape) shape;
>     IAutoShapeLock AutoShapeLock = (IAutoShapeLock) Ashp.getShapeLock();
>     
>     //Unlock shape
>     AutoShapeLock.setPositionLocked(false);
>     AutoShapeLock.setSelectLocked(false);
>     AutoShapeLock.setSizeLocked(false);
>     }
>     
>     //if shape is group shape
>     else if (shape instanceof IGroupShape) {
>     //Type casting to group shape and getting group shape lock
>     IGroupShape Group = (IGroupShape) shape;
>     IGroupShapeLock groupShapeLock = (IGroupShapeLock) Group.getShapeLock();
>     
>     //Unlock shape
>     groupShapeLock.setGroupingLocked(false);
>     groupShapeLock.setPositionLocked(false);
>     groupShapeLock.setSelectLocked(false);
>     groupShapeLock.setSizeLocked(false);
>     }
>     
>     //if shape is a connector
>     else if (shape instanceof IConnector) {
>     //Type casting to connector shape and getting connector shape lock
>     IConnector Conn = (IConnector) shape;
>     IConnectorLock ConnLock = Conn.getShapeLock();
>     
>     //Unlock shape
>     ConnLock.setPositionMove(false);
>     ConnLock.setSelectLocked(false);
>     ConnLock.setSizeLocked(false);
>     }
>     
>     //if shape is picture frame
>     else if (shape instanceof IPictureFrame) {
>     //Type casting to pitcture frame shape and getting picture frame shape lock
>     IPictureFrame Pic = (IPictureFrame) shape;
>     IPictureFrameLock PicLock = (IPictureFrameLock) Pic.getShapeLock();
>     
>     //Unlock shape
>     PicLock.setPositionLocked(false);
>     PicLock.setSelectLocked(false);
>     PicLock.setSizeLocked(false);
>     }
>     }
>     }
>     //Save the presentation file
>     pTemplate.save("ProtectedSample.pptx", SaveFormat.Pptx);
>     } catch (Exception e) {
>     }

以上便是如何在java中锁定PPT形状 ，如您还有关于产品相关方面的疑问，可以继续浏览本系列其他内容~

[Aspose.Slides]: https://www.evget.com/product/566
[Aspose API]: https://www.evget.com/supplier/150