Itext PDF生成 加水印图片文字

由于项目中用到，所以网上找了很多，但或多或少有些问题，我整理更新了一下。

Itext架包下载地址：

http://download.csdn.net/detail/qm4050/5531349

PDF生成代码如下：

import java.io.*;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;

/**
 * PDF生成
 */
public class PDFBuild {

public static void buidPDF(String pdfFile, String imageFile,
String waterMarkName, int permission) {
try {
File file = File.createTempFile("tempFile", ".pdf"); // 创建临时文件

// 生成PDF
if (createPDFFile(file)) {
waterMark(file.getPath(), imageFile, pdfFile, waterMarkName,
permission); // 添加水印
}
} catch (Exception e) {
e.printStackTrace();
}
}

/**
 * 创建PDF文件
 * 
 * @param file
 *            临时文件
 * @return 成功/失败
 */
public static boolean createPDFFile(File file) {
Rectangle rect = new Rectangle(PageSize.A4);
Document doc = new Document(rect, 50.0F, 50.0F, 50.0F, 50.0F);
try {
PdfWriter.getInstance(doc, new FileOutputStream(file));
doc.open();

BaseFont bf = BaseFont.createFont("C:/WINDOWS/Fonts/SIMSUN.TTC,1",
"Identity-H", true);// 使用系统字体

Font font = new Font(bf, 14.0F, 0);
font.setStyle(37); // 设置样式
font.setFamily("宋体"); // 设置字体

Paragraph p = new Paragraph("付 款 通 知 书\r\n", font);
p.setAlignment(1);
doc.add(p);
doc.close();
return true;
} catch (Exception e) {
e.printStackTrace();
}
return false;
}

public static void waterMark(String inputFile, String imageFile,
String outputFile, String waterMarkName, int permission) {
try {
PdfReader reader = new PdfReader(inputFile);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(
outputFile));

BaseFont base = BaseFont.createFont(
"C:/WINDOWS/Fonts/SIMSUN.TTC,1", "Identity-H", true);// 使用系统字体

int total = reader.getNumberOfPages() + 1;
Image image = Image.getInstance(imageFile);

// 图片位置
image.setAbsolutePosition(400, 480);
PdfContentByte under;
int j = waterMarkName.length();
char c = 0;
int rise = 0;
for (int i = 1; i < total; i++) {
rise = 400;
under = stamper.getUnderContent(i);
under.beginText();
under.setFontAndSize(base, 30);

if (j >= 15) {
under.setTextMatrix(200, 120);
for (int k = 0; k < j; k++) {
under.setTextRise(rise);
c = waterMarkName.charAt(k);
under.showText(c + "");
}
} else {
under.setTextMatrix(240, 100);
for (int k = 0; k < j; k++) {
under.setTextRise(rise);
c = waterMarkName.charAt(k);
under.showText(c + "");
rise -= 18;

}
}

// 添加水印文字
under.endText();

// 添加水印图片
under.addImage(image);

// 画个圈
under.ellipse(250, 450, 350, 550);
under.setLineWidth(1f);
under.stroke();
}
stamper.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
String imageFilePath = "D:/itext2.png"; // 水印图片路径
String pdfFilePath = "D:/itext.pdf"; // 文件生成路径
buidPDF(pdfFilePath, imageFilePath, "正版授权", 16);
}
}