java实现ppt文档内容

Java企业级PPT解析技术全解

一、核心架构设计

1.1 内存优化方案（企业级）

// 分片加载技术实现
public class ChunkedPPTLoader {
   
    private static final int CHUNK_SIZE = 1024 * 512; // 512KB分片
    
    public void processLargeFile(Path path) throws IOException {
   
        try (POIFSFileSystem fs = new POIFSFileSystem(
            new RandomAccessFile(path.toFile(), "r"), true)) {
   
                
            HSLFSlideShow ppt = new HSLFSlideShow(fs);
            SlideCacheManager cache = new SlideCacheManager(ppt);
            
            for (int i = 0; i < ppt.getSlides().size(); i++) {
   
                HSLFSlide slide = cache.getSlide(i);
                processSlideChunk(slide);
                releaseSlideResources(slide);
            }
        }
    }
    
    private void releaseSlideResources(HSLFSlide slide) {
   
        slide.getShapes().forEach(shape -> {
   
            if (shape instanceof HSLFPictureShape) {
   
                ((HSLFPictureShape) shape).getPictureData().dispose();
            }
        });
        System.gc();
    }
}

二、商业级文本提取技术

2.1 多级文本容器处理

public void extractHierarchicalText(HSLFTextShape shape, List<TextLevel> levels) {
   
    List<HSLFTextParagraph> paras = shape.getTextParagraphs();
    for (HSLFTextParagraph para : paras) {
   
        TextLevel level = new TextLevel();
        level.setIndent(para.getIndentLevel());
        
        para.getTextRuns().forEach(run -> {
   
            TextSpan span = new TextSpan();
            span.setText(run.getRawText());
            span.setFont(run.getFontFamily());
            span.setSize(run.getFontSize());
            span.setColor(run.getFontColor());
            level.addSpan(span);
        });
        
        levels.add(level);
    }
}

2.2 智能表格重建算法

public Table rebuildComplexTable(HSLFTable source) {
   
    Table table = new Table();
    
    // 列宽自适应计算
    double[] colWidths = calculateColumnWidths(source);
    table.setColumnWidths(colWidths);
    
    // 合并单元格检测
    detectMergedCells(source).forEach(merge -> {
   
        table.mergeCells(merge.getFirstRow(), merge.getFirstCol(), 
                       merge.getLastRow(), merge.getLastCol());
    });
    
    // 样式继承处理
    source.getStyleTable().getStyles().forEach