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 可以做到这一点,我需要使用 drawLine 等手动绘制表格,关于如何解决这个问题有什么建议吗?
4 回答
下面的方法用指定的表格内容绘制一个表格。它有点小技巧,适用于小文本字符串。它不执行自动换行,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" );
我创建了一个小 api,用于使用 PDFBox 创建表格。它可以在 github ( https://github.com/dhorions/boxable ) 上找到。
可以在此处找到生成的 pdf 示例http://goo.gl/a7QvRM。
欢迎任何提示或建议。
由于前段时间我遇到了同样的问题,我开始为它构建一个小型库,我也在努力保持最新状态。
它使用Apache PDFBox 2.x,可以在这里找到: https ://github.com/vandeseer/easytable
它允许进行一些自定义,例如在单元格级别设置字体、背景颜色、填充等、垂直和水平对齐、单元格跨越、自动换行和单元格中的图像。
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:
此示例的代码可以在此处找到- 同一文件夹中的其他示例也是如此。
接受的答案很好,但它仅适用于Apache PDFBox 1.x,对于Apache PDFBox 2.x,您需要稍微修改代码以使其正常工作。
所以这是相同的代码,但与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;
}
}
使用更新以使用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");
}