java 生成PDF文件增加密码

package com.me.test;

import java.awt.*;
import java.io.*;

import com.lowagie.text.*;
import com.lowagie.text.Font;
import com.lowagie.text.Image;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

/**
* First iText example: Hello World.
*/
public class HelloWorld {

/** Path to the resulting PDF file. */

public static final String RESULT = "c:/hello.pdf";

public static final String pwd = "123456";

public static final String result = "c:/Itext/b.gif";

/**
*
* Creates a PDF file: hello.pdf
*
*
*
* @param args
*
*            no arguments needed
*/

public static void main(String[] args) throws DocumentException,

IOException {

new HelloWorld().createPdf(RESULT);

}

/**
*
* Creates a PDF document.
*
*
*
* @param filename
*
*            the path to the new PDF document
*
* @throws DocumentException
*
* @throws IOException
*/

public void createPdf(String filename) throws DocumentException,

IOException {

// 设定文本样式
Rectangle rec = new Rectangle(PageSize.A4);

rec.setBackgroundColor(Color.GRAY);

rec.setBorder(Rectangle.TOP);

rec.setBorderColor(Color.black);

rec.setBorderWidth(50);

// 创建本文
Document doc = new Document(rec, 100, 201, 20, 20);

// 设定路径
PdfWriter pdf = PdfWriter.getInstance(doc, new FileOutputStream(HelloWorld.RESULT));

// 设定布局
pdf.setViewerPreferences(PdfWriter.PageModeUseThumbs| PdfWriter.PageLayoutTwoColumnLeft | PdfWriter.HideMenubar);

// 加密
pdf.setEncryption(pwd.getBytes(), pwd.getBytes(), PdfWriter.ALLOW_COPY| PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_40);

// 设置中文
BaseFont base = null;

Font fontChinese = null;

try {

base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.EMBEDDED);

fontChinese = new Font(base, 18, Font.BOLD);

} catch (DocumentException e) {
e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

doc.open();

doc.add(new Paragraph("我是Pro", fontChinese));

doc.close();

}
}

package com.me.test;

import java.awt.*;
import java.io.*;

import com.lowagie.text.*;
import com.lowagie.text.Font;
import com.lowagie.text.Image;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.*;

public class PdfConvertor {

// txt原始文件的路径
private static final String txtFilePath = "c:/Itext/test.txt";

// 生成的pdf文件路径
private static final String pdfFilePath = "c:/Itext/test.pdf";

// 添加水印图片路径
private static final String imageFilePath = "c:/Itext/b.gif";

// 生成临时文件前缀
private static final String prefix = "tempFile";

// 所有者密码
private static final String OWNERPASSWORD = "12345678";

/**
*
* txt文件转换为pdf文件
*
*
*
* @param txtFile
*
*            txt文件路径
*
* @param pdfFile
*
*            pdf文件路径
*
* @param userPassWord
*
*            用户密码
*
* @param waterMarkName
*
*            水印内容
*
* @param permission
*
*            操作权限
*/

public static void generatePDFWithTxt(String txtFile, String pdfFile,

String userPassWord, String waterMarkName, int permission) {

try {

// 生成临时文件
File file = File.createTempFile(prefix, ".pdf");

// 创建pdf文件到临时文件
if (createPDFFile(txtFile, file)) {

// 增加水印和加密
waterMark(file.getPath(), pdfFile, userPassWord, OWNERPASSWORD,

waterMarkName, permission);

}

} catch (Exception e) {

e.printStackTrace();

}

}

/**
*
* 创建PDF文档
*
*
*
* @param txtFilePath
*
*            txt文件路径（源文件）
*
* @param pdfFilePath
*
*            pdf文件路径(新文件)
*/

private static boolean createPDFFile(String txtFilePath, File file) {

// 设置纸张
Rectangle rect = new Rectangle(PageSize.A4);

// 设置页码
HeaderFooter footer = new HeaderFooter(new Phrase("页码:",

setChineseFont()), true);

footer.setBorder(Rectangle.NO_BORDER);

// step1
Document doc = new Document(rect, 50, 50, 50, 50);

doc.setFooter(footer);

try {

FileReader fileRead = new FileReader(txtFilePath);

BufferedReader read = new BufferedReader(fileRead);

// 设置pdf文件生成路径 step2
PdfWriter.getInstance(doc, new FileOutputStream(file));

// 打开pdf文件 step3
doc.open();

// 实例化Paragraph 获取写入pdf文件的内容，调用支持中文的方法. step4
while (read.ready()) {

// 添加内容到pdf(这里将会按照txt文件的原始样式输出)
doc.add(new Paragraph(read.readLine(), PdfConvertor.setChineseFont()));

}

// 关闭pdf文件 step5
doc.close();

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

/**
*
* 在pdf文件中添加水印
*
*
*
* @param inputFile
*
*            原始文件
*
* @param outputFile
*
*            水印输出文件
*
* @param waterMarkName
*
*            水印名字
*/

private static void waterMark(String inputFile, String outputFile,

String userPassWord, String ownerPassWord, String waterMarkName,

int permission) {

try {

PdfReader reader = new PdfReader(inputFile);

PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(

outputFile));

// 设置密码
stamper.setEncryption(userPassWord.getBytes(), ownerPassWord.getBytes(), permission, false);

BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);

PdfContentByte under;

int total = reader.getNumberOfPages() + 1;

Image image = Image.getInstance(imageFilePath);

image.setAbsolutePosition(200, 400);

int j = waterMarkName.length();

char c = 0;

int rise = 0;

for (int i = 1; i < total; i++) {

rise = 500;

under = stamper.getUnderContent(i);

// 添加图片
under.addImage(image);

under.beginText();

under.setColorFill(Color.CYAN);

under.setFontAndSize(base, 30);

// 设置水印文字字体倾斜 开始
if (j >= 15) {

under.setTextMatrix(200, 120);

for (int k = 0; k < j; k++) {

under.setTextRise(rise);

c = waterMarkName.charAt(k);

under.showText(c + "");

rise -= 20;

}

} else {

under.setTextMatrix(180, 100);

for (int k = 0; k < j; k++) {

under.setTextRise(rise);

c = waterMarkName.charAt(k);

under.showText(c + "");

rise -= 18;

}

}

// 字体设置结束
under.endText();

// 画一个圆
// under.ellipse(250, 450, 350, 550);

// under.setLineWidth(1f);

// under.stroke();

}

stamper.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/**
*
* 设置中文
*
*
*
* @return Font
*/

private static Font setChineseFont() {

BaseFont base = null;

Font fontChinese = null;

try {

base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",

BaseFont.EMBEDDED);

fontChinese = new Font(base, 12, Font.NORMAL);

} catch (DocumentException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return fontChinese;

}

public static void main(String[] args) {

generatePDFWithTxt(txtFilePath, pdfFilePath, OWNERPASSWORD, "allone",16);
}
}

import java.io.FileOutputStream;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfWriter;
/**
* iText学习笔记:HelloWorld
*
* @author 老紫竹(laozizhu.com)
*/
public class HelloWorld {
public static void main(String[] args) throws Exception, DocumentException {
// 新建一个文档，默认是A4纸的大小，4个边框为36
Document document = new Document();
// 将文档输出，我们写到文件里面
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("HelloWorld.pdf"));
writer.setEncryption("Hello".getBytes(), "World".getBytes(), PdfWriter.ALLOW_COPY
| PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_128);
document.addTitle("Hello World example");
document.addAuthor("老紫竹");
document.addSubject("This example explains how to add metadata.");
document.addKeywords("iText, Hello World, step 3, metadata");
document.addCreator("My program using iText");
// 打开文档
document.open();
// 写入数据
document.add(new Paragraph("Hello World"));
BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
Font FontChinese = new Font(bfChinese, 12, Font.NORMAL);
document.add(new Paragraph("老紫竹祝大家新年好!", FontChinese));
// 关闭文档
document.close();
}
}