Apache PDFBox Java库 - 是否有用于创建表的API？

Question

我正在使用Apache PDFBox java库来创建PDF.有没有办法使用pdfbox创建数据表？如果没有这样的API,我需要使用drawLine等手动绘制表格,有关如何进行此操作的任何建议吗？

Answer 1

来源:使用PDFBox创建表格

以下方法绘制具有指定表内容的表.它有点破解,适用于小字符串文本.它不会执行自动换行,但您可以了解它是如何完成的.搏一搏!

/**
 * @param page
 * @param contentStream
 * @param y the y-coordinate of the first row
 * @param margin the padding on left and right of table
 * @param content a 2d array containing the table data
 * @throws IOException
 */
public static void drawTable(PDPage page, PDPageContentStream contentStream, 
                            float y, float margin, 
                            String[][] content) throws IOException {
    final int rows = content.length;
    final int cols = content[0].length;
    final float rowHeight = 20f;
    final float tableWidth = page.findMediaBox().getWidth() - margin - margin;
    final float tableHeight = rowHeight * rows;
    final float colWidth = tableWidth/(float)cols;
    final float cellMargin=5f;

    //draw the rows
    float nexty = y ;
    for (int i = 0; i <= rows; i++) {
        contentStream.drawLine(margin, nexty, margin+tableWidth, nexty);
        nexty-= rowHeight;
    }

    //draw the columns
    float nextx = margin;
    for (int i = 0; i <= cols; i++) {
        contentStream.drawLine(nextx, y, nextx, y-tableHeight);
        nextx += colWidth;
    }

    //now add the text        
    contentStream.setFont( PDType1Font.HELVETICA_BOLD , 12 );        

    float textx = margin+cellMargin;
    float texty = y-15;        
    for(int i = 0; i < content.length; i++){
        for(int j = 0 ; j < content[i].length; j++){
            String text = content[i][j];
            contentStream.beginText();
            contentStream.moveTextPositionByAmount(textx,texty);
            contentStream.drawString(text);
            contentStream.endText();
            textx += colWidth;
        }
        texty-=rowHeight;
        textx = margin+cellMargin;
    }
}

用法:

PDDocument doc = new PDDocument();
PDPage page = new PDPage();
doc.addPage( page );

PDPageContentStream contentStream = new PDPageContentStream(doc, page);

String[][] content = {{"a","b", "1"}, 
                      {"c","d", "2"}, 
                      {"e","f", "3"}, 
                      {"g","h", "4"}, 
                      {"i","j", "5"}} ;

drawTable(page, contentStream, 700, 100, content);
contentStream.close();
doc.save("test.pdf" );

Answer 2

我创建了一个使用PDFBox创建表的小API.它可以在github上找到(https://github.com/dhorions/boxable).

生成的pdf样本可以在http://goo.gl/a7QvRM找到.

欢迎任何提示或建议.

Answer 3

接受的答案很好,但它只适用于Apache PDFBox 1.x,对于Apache PDFBox 2.x,您需要修改一些代码才能使其正常工作.

所以这里是相同的代码,但它与Apache PDFBox 2.x兼容:

方法drawTable:

public static void drawTable(PDPage page, PDPageContentStream contentStream,
    float y, float margin, String[][] content) throws IOException {
    final int rows = content.length;
    final int cols = content[0].length;
    final float rowHeight = 20.0f;
    final float tableWidth = page.getMediaBox().getWidth() - 2.0f * margin;
    final float tableHeight = rowHeight * (float) rows;
    final float colWidth = tableWidth / (float) cols;

    //draw the rows
    float nexty = y ;
    for (int i = 0; i <= rows; i++) {
        contentStream.moveTo(margin, nexty);
        contentStream.lineTo(margin + tableWidth, nexty);
        contentStream.stroke();
        nexty-= rowHeight;
    }

    //draw the columns
    float nextx = margin;
    for (int i = 0; i <= cols; i++) {
        contentStream.moveTo(nextx, y);
        contentStream.lineTo(nextx, y - tableHeight);
        contentStream.stroke();
        nextx += colWidth;
    }

    //now add the text
    contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12.0f);

    final float cellMargin = 5.0f;
    float textx = margin + cellMargin;
    float texty = y - 15.0f;
    for (final String[] aContent : content) {
        for (String text : aContent) {
            contentStream.beginText();
            contentStream.newLineAtOffset(textx, texty);
            contentStream.showText(text);
            contentStream.endText();
            textx += colWidth;
        }
        texty -= rowHeight;
        textx = margin + cellMargin;
    }
}

更新了Usage以使用try-with-resources语句正确关闭资源:

try (PDDocument doc = new PDDocument()) {
    PDPage page = new PDPage();
    doc.addPage(page);

    try (PDPageContentStream contentStream = new PDPageContentStream(doc, page)) {
        String[][] content = {{"a", "b", "1"},
            {"c", "d", "2"},
            {"e", "f", "3"},
            {"g", "h", "4"},
            {"i", "j", "5"}};
        drawTable(page, contentStream, 700.0f, 100.0f, content);
    }
    doc.save("test.pdf");
}

Answer 4

由于前段时间我遇到了同样的问题，因此我开始为它建立一个小型库，我也在努力保持最新状态。

它使用Apache PDFBox 2.x，可以在以下位置找到：https : //github.com/vandeseer/easytable

它允许进行一些自定义设置，例如在单元格级别上设置字体，背景颜色，填充等，垂直和水平对齐，单元格跨度，自动换行以及单元格中的图像。

跨多个页面绘制表格也是可能的。

例如，您可以创建这样的表：

该示例的代码可在此处找到-其他示例也位于同一文件夹中。