XWPF POI paragraph border color red - colors

Question

How to change color of paragraph border.
paragraph border color red
enter image description here

Answer 1

Although apache poi XWPF provides to set paragraph borders using XWPFParagraph.setBorder... methods - for ex. XWPFParagraph.html#setBorderLeft - it not provides setting border colors upto now. So we need using the underlaying low level org.openxmlformats.schemas.wordprocessingml.x2006.main.* classes.
Paragraph borders are set in paragraph properties (pPr). There are paragraph border (pBdr) elements having settings for left, top, right and bottom borders. Those left, top, right and bottom elements then have settings for line type (this is what apache poi provides already), line size and line color. The color is set as RGB-Hex.
Following example provides a method void setBorderLeftColor(XWPFParagraph paragraph, String rgb) to set left border color.
import java.io.FileOutputStream;
import org.apache.poi.xwpf.usermodel.*;
public class CreateWordParagraphBorderColor {
private static void setBorderLeftColor(XWPFParagraph paragraph, String rgb) {
if (paragraph.getCTP().getPPr() == null) return; // no paragraph properties = no borders
if (paragraph.getCTP().getPPr().getPBdr() == null) return; // no paragraph border
if (paragraph.getCTP().getPPr().getPBdr().getLeft() == null) return; // no left border
paragraph.getCTP().getPPr().getPBdr().getLeft().setColor(rgb);
}
public static void main(String[] args) throws Exception {
XWPFDocument document = new XWPFDocument();
XWPFParagraph paragraph = document.createParagraph();
XWPFRun run = paragraph.createRun();
run.setText("Following paragraph with border left and border left color:");
paragraph = document.createParagraph();
paragraph.setBorderLeft(Borders.SINGLE);
setBorderLeftColor(paragraph, "FF0000");
run = paragraph.createRun();
run.setText("Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.");
paragraph = document.createParagraph();
FileOutputStream out = new FileOutputStream("CreateWordParagraphBorderColor.docx");
document.write(out);
out.close();
document.close();
}
}