Java开源工具iText生成PDF简单实例

itext下载页面：
1.创建简单的pdf文件

package console.pdf;

import java.io.filenotfoundexception;
import java.io.fileoutputstream;

import com.itextpdf.text.document;
import com.itextpdf.text.documentexception;
import com.itextpdf.text.pagesize;
import com.itextpdf.text.paragraph;
import com.itextpdf.text.pdf.pdfwriter;

/**
 * 使用itext生成pdf文件
 */
public class createpdf {

  public static void main(string[] args) {
    createpdf p001 = new createpdf();

    string filename = "p001.pdf";
    p001.createpdf(filename);
  }

  public void createpdf(string filename) {
    // step 1
    document document = new document(pagesize.a4);
    // step 2
    try {
      pdfwriter.getinstance(document, new fileoutputstream(filename));
      
      document.addtitle("id.net");
      document.addauthor("dotuian"); 
      document.addsubject("this is the subject of the pdf file."); 
      document.addkeywords("this is the keyword of the pdf file.");
      
      // step 3
      document.open();
      // step 4
      document.add(new paragraph("hello world!"));

      
    } catch (filenotfoundexception e) {
      e.printstacktrace();
    } catch (documentexception e) {
      e.printstacktrace();
    } finally {
      // step 5
      document.close();
    }
  }

  
  
  
}

2.在pdf文件中添加table

package console.pdf;

import java.io.filenotfoundexception;
import java.io.fileoutputstream;

import com.itextpdf.text.basecolor;
import com.itextpdf.text.document;
import com.itextpdf.text.documentexception;
import com.itextpdf.text.pagesize;
import com.itextpdf.text.phrase;
import com.itextpdf.text.rectangle;
import com.itextpdf.text.pdf.pdfpcell;
import com.itextpdf.text.pdf.pdfptable;
import com.itextpdf.text.pdf.pdfwriter;

/**
 * 使用itext生成pdf文件
 * 在pdf文件中创建表格
 */
public class tableofpdf {

  public static void main(string[] args) {
    tableofpdf p001 = new tableofpdf();

    string filename = "p002.pdf";
    p001.createpdf(filename);
  }

  public void createpdf(string filename) {
    // step 1
    document document = new document(pagesize.a4);
    // step 2
    try {
      pdfwriter.getinstance(document, new fileoutputstream(filename));

      document.addtitle("id.net");
      document.addauthor("dotuian");
      document.addsubject("this is the subject of the pdf file.");
      document.addkeywords("this is the keyword of the pdf file.");

      // step 3
      document.open();
      // step 4
      pdfptable table = createtable1();
      document.add(table);
      
      table = createtable2();
      table.setspacingbefore(5);
      table.setspacingafter(5);
      document.add(table);
      
      table = createtable3();
      document.add(table);
      
      table = createtable4();
      table.setspacingbefore(5);
      table.setspacingafter(5);
      document.add(table);
      
      table = createtable5();
      document.add(table);
      
      table = createtable6();
      document.add(table);

    } catch (filenotfoundexception e) {
      e.printstacktrace();
    } catch (documentexception e) {
      e.printstacktrace();
    } finally {
      // step 5
      document.close();
    }
  }

  /**
   * creates a table; widths are set with setwidths().
   * 
   * @return a pdfptable
   * @throws documentexception
   */
  public static pdfptable createtable1() throws documentexception {
    pdfptable table = new pdfptable(3);
    table.setwidthpercentage(288 / 5.23f);
    table.setwidths(new int[] { 2, 1, 1 });
    
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 1"));
    cell.setcolspan(3);
    table.addcell(cell);
    
    cell = new pdfpcell(new phrase("cell with rowspan 2"));
    cell.setrowspan(2);
    table.addcell(cell);
    table.addcell("row 1; cell 1");
    table.addcell("row 1; cell 2");
    table.addcell("row 2; cell 1");
    table.addcell("row 2; cell 2");
    return table;
  }

  /**
   * creates a table; widths are set with setwidths().
   * 
   * @return a pdfptable
   * @throws documentexception
   */
  public static pdfptable createtable2() throws documentexception {
    pdfptable table = new pdfptable(3);
    table.settotalwidth(288);
    table.setlockedwidth(true);
    table.setwidths(new float[] { 2, 1, 1 });
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 2"));
    cell.setcolspan(3);
    table.addcell(cell);
    cell = new pdfpcell(new phrase("cell with rowspan 2"));
    cell.setrowspan(2);
    table.addcell(cell);
    table.addcell("row 1; cell 1");
    table.addcell("row 1; cell 2");
    table.addcell("row 2; cell 1");
    table.addcell("row 2; cell 2");
    return table;
  }

  /**
   * creates a table; widths are set in the constructor.
   * 
   * @return a pdfptable
   * @throws documentexception
   */
  public static pdfptable createtable3() throws documentexception {
    pdfptable table = new pdfptable(new float[] { 2, 1, 1 });
    table.setwidthpercentage(55.067f);
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 3"));
    cell.setcolspan(3);
    table.addcell(cell);
    cell = new pdfpcell(new phrase("cell with rowspan 2"));
    cell.setrowspan(2);
    table.addcell(cell);
    table.addcell("row 1; cell 1");
    table.addcell("row 1; cell 2");
    table.addcell("row 2; cell 1");
    table.addcell("row 2; cell 2");
    return table;
  }

  /**
   * creates a table; widths are set with special setwidthpercentage() method.
   * 
   * @return a pdfptable
   * @throws documentexception
   */
  public static pdfptable createtable4() throws documentexception {
    pdfptable table = new pdfptable(3);
    rectangle rect = new rectangle(523, 770);
    table.setwidthpercentage(new float[] { 144, 72, 72 }, rect);
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 4"));
    cell.setcolspan(3);
    table.addcell(cell);
    cell = new pdfpcell(new phrase("cell with rowspan 2"));
    cell.setrowspan(2);
    table.addcell(cell);
    table.addcell("row 1; cell 1");
    table.addcell("row 1; cell 2");
    table.addcell("row 2; cell 1");
    table.addcell("row 2; cell 2");
    return table;
  }

  /**
   * creates a table; widths are set with settotalwidth().
   * 
   * @return a pdfptable
   * @throws documentexception
   */
  public static pdfptable createtable5() throws documentexception {
    pdfptable table = new pdfptable(3);
    table.settotalwidth(new float[] { 144, 72, 72 });
    table.setlockedwidth(true);
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 5"));
    cell.setcolspan(3);
    table.addcell(cell);
    cell = new pdfpcell(new phrase("cell with rowspan 2"));
    cell.setrowspan(2);
    table.addcell(cell);
    table.addcell("row 1; cell 1");
    table.addcell("row 1; cell 2");
    table.addcell("row 2; cell 1");
    table.addcell("row 2; cell 2");
    return table;
  }
  
  public static pdfptable createtable6() throws documentexception{
    pdfptable table = new pdfptable(10);
    table.settotalwidth(595);
    //table.setlockedwidth(true);
    
    
    pdfpcell cell;
    cell = new pdfpcell(new phrase("table 6"));
    cell.setcolspan(10);
    table.addcell(cell);
    
    for (int i = 1; i < 100; i++) {
      cell = new pdfpcell(new phrase(string.valueof(i)));
      cell.setbackgroundcolor(basecolor.light_gray);
      table.addcell(cell);
    }
    
    
//    cell = new pdfpcell(new phrase("cell with rowspan 2"));
//    cell.setrowspan(2);
//    table.addcell(cell);
//    table.addcell("row 1; cell 1");
//    table.addcell("row 1; cell 2");
//    table.addcell("row 2; cell 1");
//    table.addcell("row 2; cell 2");
    return table;
  }
  
  

}

3.在pdf文件中添加图片，并且指定文本位置

package console.pdf;

import java.io.filenotfoundexception;
import java.io.fileoutputstream;

import com.itextpdf.text.document;
import com.itextpdf.text.documentexception;
import com.itextpdf.text.image;
import com.itextpdf.text.pagesize;
import com.itextpdf.text.pdf.basefont;
import com.itextpdf.text.pdf.pdfcontentbyte;
import com.itextpdf.text.pdf.pdfwriter;

/**
 * 使用itext生成pdf文件
 * 在pdf文件中添加背景图片，并指定文本在pdf文件中的位置
 */
public class backgroundimageofpdf {

  public static void main(string[] args) {
    backgroundimageofpdf p001 = new backgroundimageofpdf();

    string filename = "p003.pdf";
    p001.createpdf(filename);
  }

  public void createpdf(string filename) {
    // step 1
    document document = new document(pagesize.a4.rotate(),0,0,0,0);
    // step 2
    try {
      pdfwriter pdfwriter = pdfwriter.getinstance(document, new fileoutputstream(filename));
      
      document.addtitle("id.net");
      document.addauthor("dotuian"); 
      document.addsubject("this is the subject of the pdf file."); 
      document.addkeywords("this is the keyword of the pdf file.");
      
      // step 3
      document.open();
      // step 4
      image image = image.getinstance("bg.jpg");
      document.add(image);

      pdfcontentbyte pdfcontentbyte = pdfwriter.getdirectcontent();
      pdfcontentbyte.begintext();
      basefont bf = basefont.createfont(basefont.times_roman,basefont.winansi,basefont.embedded);
      pdfcontentbyte.setfontandsize(bf, 12);

      for (int i = 0; i <= 842; i = i + 50) {
        for (int j = 0; j <= 595; j = j + 20) {
          pdfcontentbyte.settextmatrix(i, j);
          pdfcontentbyte.showtext("(" + i + ":" + j + ")");
        }
      }
      
      pdfcontentbyte.endtext();
      
    } catch (filenotfoundexception e) {
      e.printstacktrace();
    } catch (documentexception e) {
      e.printstacktrace();
    } catch (exception e) {
      e.printstacktrace();
    } finally {
      // step 5
      document.close();
    }
  }
}