添加过程
1、加载Excel测试文档;
2、设置文本和字体大小;
3、调用DrawText()方法插入图片,将图片设置为页眉;
4、将图片设置为页眉,定义图片宽度和高度、文本显示样式及位置。
实例
import com.spire.xls.*; import <span><a href="http://www.lanqibing.com/tag/java/" title="View all posts in java" target="_blank">java</a></span>.awt.*; import <span><a href="http://www.lanqibing.com/tag/java/" title="View all posts in java" target="_blank">java</a></span>.awt.image.BufferedImage; import static <span><a href="http://www.lanqibing.com/tag/java/" title="View all posts in java" target="_blank">java</a></span>.awt.image.BufferedImage.TYPE_INT_ARGB; public class SingleWatermark { public static void main(String[] args) { //加载Excel测试文档 Workbook wb = new Workbook(); wb.loadFromFile("test.xlsx"); //设置文本和字体大小 Font font = new Font("仿宋", Font.PLAIN, 40); for (int i =0;i<wb.getWorksheets().getCount();i++) { Worksheet sheet = wb.getWorksheets().get(i); //调用DrawText() 方法插入图片 BufferedImage imgWtrmrk = drawText("内部专用", font, Color.pink, Color.white, sheet.getPageSetup().getPageHeight(), sheet.getPageSetup().getPageWidth()); //将图片设置为页眉 sheet.getPageSetup().setCenterHeaderImage(imgWtrmrk); sheet.getPageSetup().setCenterHeader("&G"); //将显示模式设置为Layout sheet.setViewMode(ViewMode.Layout); } //保存文档 wb.saveToFile("SingleWatermark.xlsx", ExcelVersion.Version2013); } private static BufferedImage drawText (String text, Font font, Color textColor, Color backColor,double height, double width) { //定义图片宽度和高度 BufferedImage img = new BufferedImage((int) width, (int) height, TYPE_INT_ARGB); Graphics2D loGraphic = img.createGraphics(); //获取文本size FontMetrics loFontMetrics = loGraphic.getFontMetrics(font); int liStrWidth = loFontMetrics.stringWidth(text); int liStrHeight = loFontMetrics.getHeight(); //文本显示样式及位置 loGraphic.setColor(backColor); loGraphic.fillRect(0, 0, (int) width, (int) height); loGraphic.translate(((int) width - liStrWidth) / 2, ((int) height - liStrHeight) / 2); loGraphic.rotate(Math.toRadians(-45)); loGraphic.translate(-((int) width - liStrWidth) / 2, -((int) height - liStrHeight) / 2); loGraphic.setFont(font); loGraphic.setColor(textColor); loGraphic.drawString(text, ((int) width - liStrWidth) / 2, ((int) height - liStrHeight) / 2); loGraphic.dispose(); return img; } }
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