• iText实战--根据绝对位置添加内容

    3.1 direct content 概念简介

    pdf内容的4个层级

    层级1：在text和graphics底下，PdfWriter.getDirectContentUnder()

    层级2：graphics层，Chunk, Images背景，PdfPCell的边界等

    层级3：text层，Chunks, Phrases, Paragraphs 内容等

    层级4：在text和graphics顶上，PdfWriter.getDirectContent()

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Document;
    5. import com.itextpdf.text.DocumentException;
    6. import com.itextpdf.text.Element;
    7. import com.itextpdf.text.Font;
    8. import com.itextpdf.text.Image;
    9. import com.itextpdf.text.PageSize;
    10. import com.itextpdf.text.Paragraph;
    11. import com.itextpdf.text.Font.FontFamily;
    12. import com.itextpdf.text.pdf.BaseFont;
    13. import com.itextpdf.text.pdf.PdfContentByte;
    14. import com.itextpdf.text.pdf.PdfWriter;
    15.  
    16. public class FestivalOpening {
    17.  
    18.     /** The resulting PDF. */
    19.     public static final String RESULT
    20.         = "D:/data/iText/inAction/chapter03/festival_opening.pdf";
    21.     /** The movie poster. */
    22.     public static final String RESOURCE = "E:/study/PDF/SourceCodeiText/itext-book/book/resources/img/loa.jpg";
    23.  
    24.     /**
    25.      * Main method.
    26.      * @param    args    no arguments needed
    27.      * @throws DocumentException 
    28.      * @throws IOException
    29.      */
    30.     public static void main(String[] args)
    31.         throws IOException, DocumentException {
    32.     	// step 1
    33.         Document document = new Document(PageSize.POSTCARD, 30, 30, 30, 30);
    34.         // step 2
    35.         PdfWriter writer
    36.             = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
    37.         // step 3
    38.         document.open();
    39.         // step 4
    40.         // Create and add a Paragraph
    41.         Paragraph p
    42.             = new Paragraph("Foobar Film Festival", new Font(FontFamily.HELVETICA, 22));
    43.         p.setAlignment(Element.ALIGN_CENTER);
    44.         document.add(p);
    45.         // Create and add an Image
    46.         Image img = Image.getInstance(RESOURCE);
    47.         img.setAbsolutePosition(
    48.             (PageSize.POSTCARD.getWidth() - img.getScaledWidth()) / 2,
    49.             (PageSize.POSTCARD.getHeight() - img.getScaledHeight()) / 2);
    50.         document.add(img);
    51.         
    52.         // Now we go to the next page
    53.         document.newPage();
    54.         document.add(p);
    55.         document.add(img);
    56.         // Add text on top of the image
    57.         PdfContentByte over = writer.getDirectContent();
    58.         over.saveState();
    59.         float sinus = (float)Math.sin(Math.PI / 60);
    60.         float cosinus = (float)Math.cos(Math.PI / 60);
    61.         BaseFont bf = BaseFont.createFont();
    62.         over.beginText();
    63.         over.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE);
    64.         over.setLineWidth(1.5f);
    65.         over.setRGBColorStroke(0xFF, 0x00, 0x00);
    66.         over.setRGBColorFill(0xFF, 0xFF, 0xFF);
    67.         over.setFontAndSize(bf, 36);
    68.         over.setTextMatrix(cosinus, sinus, -sinus, cosinus, 50, 324);
    69.         over.showText("SOLD OUT");
    70.         over.endText();
    71.         over.restoreState();
    72.         // Add a rectangle under the image
    73.         PdfContentByte under = writer.getDirectContentUnder();
    74.         under.saveState();
    75.         under.setRGBColorFill(0xFF, 0xD7, 0x00);
    76.         under.rectangle(5, 5,
    77.             PageSize.POSTCARD.getWidth() - 10, PageSize.POSTCARD.getHeight() - 10);
    78.         under.fill();
    79.         under.restoreState();
    80.         // step 5
    81.         document.close();
    82.     }
    83. }

    Graphics 状态

    1、fill()填充四方形，并根据setRGBColorFill()填充，默认无边框

    2、fillStroke()填充四方形，并根据setLineWidth()和默认black画边框

    3、setRGBColorStroke() 设置边框颜色

    4、current transformation matrix（CTM）当前转换矩阵

    5、stroke() 仅画边框

    6、saveState/rrestoreState 对应入栈、出栈

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Document;
    5. import com.itextpdf.text.DocumentException;
    6. import com.itextpdf.text.Rectangle;
    7. import com.itextpdf.text.pdf.PdfContentByte;
    8. import com.itextpdf.text.pdf.PdfWriter;
    9.  
    10. public class GraphicsStateStack {
    11.     
    12.     /** The resulting PDF. */
    13.     public static final String RESULT
    14.         = "D:/data/iText/inAction/chapter03/graphics_state.pdf";
    15.  
    16.     /**
    17.      * Main method.
    18.      *
    19.      * @param    args    no arguments needed
    20.      * @throws DocumentException 
    21.      * @throws IOException
    22.      */
    23.     public static void main(String[] args)
    24.         throws IOException, DocumentException {
    25.     	// step 1
    26.         Document document = new Document(new Rectangle(200, 120));
    27.         // step 2
    28.         PdfWriter writer
    29.              = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
    30.         // step 3
    31.         document.open();
    32.         // step 4
    33.         PdfContentByte canvas = writer.getDirectContent();
    34.         // state 1:
    35.         canvas.setRGBColorFill(0xFF, 0x45, 0x00);
    36.         // fill a rectangle in state 1
    37.         canvas.rectangle(10, 10, 60, 60);
    38.         canvas.fill();
    39.         canvas.saveState();
    40.         // state 2;
    41.         canvas.setLineWidth(3);
    42.         canvas.setRGBColorFill(0x8B, 0x00, 0x00);
    43.         // fill and stroke a rectangle in state 2
    44.         canvas.rectangle(40, 20, 60, 60);
    45.         canvas.fillStroke();
    46.         canvas.saveState();
    47.         // state 3:
    48.         canvas.concatCTM(1, 0, 0.1f, 1, 0, 0);
    49.         canvas.setRGBColorStroke(0xFF, 0x45, 0x00);
    50.         canvas.setRGBColorFill(0xFF, 0xD7, 0x00);
    51.         // fill and stroke a rectangle in state 3
    52.         canvas.rectangle(70, 30, 60, 60);
    53.         canvas.fillStroke();
    54.         canvas.restoreState();
    55.         // stroke a rectangle in state 2
    56.         canvas.rectangle(100, 40, 60, 60);
    57.         canvas.stroke();
    58.         canvas.restoreState();
    59.         // fill and stroke a rectangle in state 1
    60.         canvas.rectangle(130, 50, 60, 60);
    61.         canvas.fillStroke();
    62.         // step 5
    63.         document.close();
    64.     }
    65. }

    Text 状态

    1、showText()，设置显示的文本

    2、setTextRenderingMode()设置边框模式，setLineWidth()设置边框宽度，默认无边框

    3、setFontAndSize() 设置字体和大小

    4、setTextMatrix() 设置字体矩阵

    5、setRGBColorStoke() 设置边框颜色

    6、setRGBColorFill() 设置填充颜色

    3.2 根据绝对定位添加Text

    PdfContentByte.showTextAligned（）

    测量字符串

    1.         Chunk c;
    2.         String foobar = "Foobar Film Festival";
    3.         // Measuring a String in Helvetica
    4.         Font helvetica = new Font(FontFamily.HELVETICA, 12);
    5.         BaseFont bf_helv = helvetica.getCalculatedBaseFont(false);
    6.         float width_helv = bf_helv.getWidthPoint(foobar, 12);
    7.         c = new Chunk(foobar + ": " + width_helv, helvetica);
    8.         document.add(new Paragraph(c));
    9.         document.add(new Paragraph(String.format("Chunk width: %f", c.getWidthPoint())));
    10.         // Measuring a String in Times
    11.         BaseFont bf_times = BaseFont.createFont(
    12.             "c:/windows/fonts/times.ttf", BaseFont.WINANSI, BaseFont.EMBEDDED);
    13.         Font times = new Font(bf_times, 12);
    14.         float width_times = bf_times.getWidthPoint(foobar, 12);
    15.         c = new Chunk(foobar + ": " + width_times, times);
    16.         document.add(new Paragraph(c));
    17.         document.add(new Paragraph(String.format("Chunk width: %f", c.getWidthPoint())));
    18.         document.add(Chunk.NEWLINE);

    字符串上行空间和下行空间

    注意：字体大小不是某个字符的高度，而是一行的垂直空间

    1.         // Ascent and descent of the String
    2.         document.add(new Paragraph("Ascent Helvetica: "
    3.                 + bf_helv.getAscentPoint(foobar, 12)));
    4.         document.add(new Paragraph("Ascent Times: "
    5.                 + bf_times.getAscentPoint(foobar, 12)));
    6.         document.add(new Paragraph("Descent Helvetica: "
    7.                 + bf_helv.getDescentPoint(foobar, 12)));
    8.         document.add(new Paragraph("Descent Times: "
    9.                 + bf_times.getDescentPoint(foobar, 12)));

    字符串定位

    1.         PdfContentByte canvas = writer.getDirectContent();        
    2.         // Adding text with PdfContentByte.showTextAligned()
    3.         canvas.beginText();
    4.         canvas.setFontAndSize(bf_helv, 12);
    5.         canvas.showTextAligned(Element.ALIGN_LEFT, foobar, 400, 788, 0);
    6.         canvas.showTextAligned(Element.ALIGN_RIGHT, foobar, 400, 752, 0);
    7.         canvas.showTextAligned(Element.ALIGN_CENTER, foobar, 400, 716, 0);
    8.         canvas.showTextAligned(Element.ALIGN_CENTER, foobar, 400, 680, 30);
    9.         canvas.showTextAlignedKerned(Element.ALIGN_LEFT, foobar, 400, 644, 0);
    10.         canvas.endText();

    字距调整（KERNING ）

    1.         // Kerned text
    2.         width_helv = bf_helv.getWidthPointKerned(foobar, 12);
    3.         c = new Chunk(foobar + ": " + width_helv, helvetica);
    4.         document.add(new Paragraph(c));

    ColumnText.showTextAligned()

    1.         // Adding text with ColumnText.showTextAligned()
    2.         Phrase phrase = new Phrase(foobar, times);
    3.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 200, 572, 0);
    4.         ColumnText.showTextAligned(canvas, Element.ALIGN_RIGHT, phrase, 200, 536, 0);
    5.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 500, 0);
    6.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 464, 30);
    7.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 428, -30);

    短句（Phrase）定位

    一个短句（Phrase）能够包含一系列的块（Chunk）。添加短句（Phrase）到绝对定位，可以方便地选择字体、字号和颜色，iText会自动计算短句（Phrase）内每个块（Chunk）的间距。

    块：缩放、倾斜、渲染模式（Chunks: Scaling、Skewing、Rendering Mode）

    1、setScaling(float scale) 设置缩放比例

    2、setSkew(float arg1, float arg2) 设置倾斜，arg1：基线的角度，arg2：字符对基线的角度

    3、setTextRenderMode() 设置文本渲染模式

    PdfContentByte.TEXT_RENDER_MODE_FILL，默认填充字符形状，无边框
    PdfContentByte.TEXT_RENDER_MODE_STROKE，不填充字符，仅边框
    PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE，填充字符，带边框
    PdfContentByte.TEXT_RENDER_MODE_INVISIBLE，文本不可见 
    1.         // Chunk attributes
    2.         c = new Chunk(foobar, times);
    3.         c.setHorizontalScaling(0.5f);
    4.         phrase = new Phrase(c);
    5.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 572, 0);
    6.         c = new Chunk(foobar, times);
    7.         c.setSkew(15, 15);
    8.         phrase = new Phrase(c);
    9.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 536, 0);
    10.         c = new Chunk(foobar, times);
    11.         c.setSkew(0, 25);
    12.         phrase = new Phrase(c);
    13.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 500, 0);
    14.         c = new Chunk(foobar, times);
    15.         c.setTextRenderMode(PdfContentByte.TEXT_RENDER_MODE_STROKE, 0.1f, BaseColor.RED);
    16.         phrase = new Phrase(c);
    17.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 464, 0);
    18.         c = new Chunk(foobar, times);
    19.         c.setTextRenderMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE, 1, null);
    20.         phrase = new Phrase(c);
    21.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 428, -0);

    完整示例

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Chunk;
    5. import com.itextpdf.text.Document;
    6. import com.itextpdf.text.DocumentException;
    7. import com.itextpdf.text.Element;
    8. import com.itextpdf.text.Font;
    9. import com.itextpdf.text.Paragraph;
    10. import com.itextpdf.text.Phrase;
    11. import com.itextpdf.text.Font.FontFamily;
    12. import com.itextpdf.text.pdf.BaseFont;
    13. import com.itextpdf.text.pdf.ColumnText;
    14. import com.itextpdf.text.pdf.PdfContentByte;
    15. import com.itextpdf.text.pdf.PdfWriter;
    16. import com.itextpdf.text.BaseColor;
    17.  
    18. public class FoobarFilmFestival {
    19.  
    20.     public static final String RESULT
    21.         = "D:/data/iText/inAction/chapter03/foobar_film_festival.pdf";
    22.  
    23.     /**
    24.      * Main method.
    25.      *
    26.      * @param    args    no arguments needed
    27.      * @throws DocumentException 
    28.      * @throws IOException
    29.      */
    30.     public static void main(String[] args)
    31.         throws IOException, DocumentException {
    32.     	// step 1
    33.         Document document = new Document();
    34.         // step 2
    35.         PdfWriter writer
    36.             = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
    37.         // step 3
    38.         document.open();
    39.         // step 4
    40.         Chunk c;
    41.         String foobar = "Foobar Film Festival";
    42.         // Measuring a String in Helvetica
    43.         Font helvetica = new Font(FontFamily.HELVETICA, 12);
    44.         BaseFont bf_helv = helvetica.getCalculatedBaseFont(false);
    45.         float width_helv = bf_helv.getWidthPoint(foobar, 12);
    46.         c = new Chunk(foobar + ": " + width_helv, helvetica);
    47.         document.add(new Paragraph(c));
    48.         document.add(new Paragraph(String.format("Chunk width: %f", c.getWidthPoint())));
    49.         // Measuring a String in Times
    50.         BaseFont bf_times = BaseFont.createFont(
    51.             "c:/windows/fonts/times.ttf", BaseFont.WINANSI, BaseFont.EMBEDDED);
    52.         Font times = new Font(bf_times, 12);
    53.         float width_times = bf_times.getWidthPoint(foobar, 12);
    54.         c = new Chunk(foobar + ": " + width_times, times);
    55.         document.add(new Paragraph(c));
    56.         document.add(new Paragraph(String.format("Chunk width: %f", c.getWidthPoint())));
    57.         document.add(Chunk.NEWLINE);
    58.         // Ascent and descent of the String
    59.         document.add(new Paragraph("Ascent Helvetica: "
    60.                 + bf_helv.getAscentPoint(foobar, 12)));
    61.         document.add(new Paragraph("Ascent Times: "
    62.                 + bf_times.getAscentPoint(foobar, 12)));
    63.         document.add(new Paragraph("Descent Helvetica: "
    64.                 + bf_helv.getDescentPoint(foobar, 12)));
    65.         document.add(new Paragraph("Descent Times: "
    66.                 + bf_times.getDescentPoint(foobar, 12)));
    67.         document.add(Chunk.NEWLINE);
    68.         // Kerned text
    69.         width_helv = bf_helv.getWidthPointKerned(foobar, 12);
    70.         c = new Chunk(foobar + ": " + width_helv, helvetica);
    71.         document.add(new Paragraph(c));
    72.         // Drawing lines to see where the text is added
    73.         PdfContentByte canvas = writer.getDirectContent();
    74.         canvas.saveState();
    75.         canvas.setLineWidth(0.05f);
    76.         canvas.moveTo(400, 806);
    77.         canvas.lineTo(400, 626);
    78.         canvas.moveTo(508.7f, 806);
    79.         canvas.lineTo(508.7f, 626);
    80.         canvas.moveTo(280, 788);
    81.         canvas.lineTo(520, 788);
    82.         canvas.moveTo(280, 752);
    83.         canvas.lineTo(520, 752);
    84.         canvas.moveTo(280, 716);
    85.         canvas.lineTo(520, 716);
    86.         canvas.moveTo(280, 680);
    87.         canvas.lineTo(520, 680);
    88.         canvas.moveTo(280, 644);
    89.         canvas.lineTo(520, 644);
    90.         canvas.stroke();
    91.         canvas.restoreState();
    92.         // Adding text with PdfContentByte.showTextAligned()
    93.         canvas.beginText();
    94.         canvas.setFontAndSize(bf_helv, 12);
    95.         canvas.showTextAligned(Element.ALIGN_LEFT, foobar, 400, 788, 0);
    96.         canvas.showTextAligned(Element.ALIGN_RIGHT, foobar, 400, 752, 0);
    97.         canvas.showTextAligned(Element.ALIGN_CENTER, foobar, 400, 716, 0);
    98.         canvas.showTextAligned(Element.ALIGN_CENTER, foobar, 400, 680, 30);
    99.         canvas.showTextAlignedKerned(Element.ALIGN_LEFT, foobar, 400, 644, 0);
    100.         canvas.endText();
    101.         // More lines to see where the text is added
    102.         canvas.saveState();
    103.         canvas.setLineWidth(0.05f);
    104.         canvas.moveTo(200, 590);
    105.         canvas.lineTo(200, 410);
    106.         canvas.moveTo(400, 590);
    107.         canvas.lineTo(400, 410);
    108.         canvas.moveTo(80, 572);
    109.         canvas.lineTo(520, 572);
    110.         canvas.moveTo(80, 536);
    111.         canvas.lineTo(520, 536);
    112.         canvas.moveTo(80, 500);
    113.         canvas.lineTo(520, 500);
    114.         canvas.moveTo(80, 464);
    115.         canvas.lineTo(520, 464);
    116.         canvas.moveTo(80, 428);
    117.         canvas.lineTo(520, 428);
    118.         canvas.stroke();
    119.         canvas.restoreState();
    120.         // Adding text with ColumnText.showTextAligned()
    121.         Phrase phrase = new Phrase(foobar, times);
    122.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 200, 572, 0);
    123.         ColumnText.showTextAligned(canvas, Element.ALIGN_RIGHT, phrase, 200, 536, 0);
    124.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 500, 0);
    125.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 464, 30);
    126.         ColumnText.showTextAligned(canvas, Element.ALIGN_CENTER, phrase, 200, 428, -30);
    127.         // Chunk attributes
    128.         c = new Chunk(foobar, times);
    129.         c.setHorizontalScaling(0.5f);
    130.         phrase = new Phrase(c);
    131.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 572, 0);
    132.         c = new Chunk(foobar, times);
    133.         c.setSkew(15, 15);
    134.         phrase = new Phrase(c);
    135.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 536, 0);
    136.         c = new Chunk(foobar, times);
    137.         c.setSkew(0, 25);
    138.         phrase = new Phrase(c);
    139.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 500, 0);
    140.         c = new Chunk(foobar, times);
    141.         c.setTextRenderMode(PdfContentByte.TEXT_RENDER_MODE_STROKE, 0.1f, BaseColor.RED);
    142.         phrase = new Phrase(c);
    143.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 464, 0);
    144.         c = new Chunk(foobar, times);
    145.         c.setTextRenderMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE, 1, null);
    146.         phrase = new Phrase(c);
    147.         ColumnText.showTextAligned(canvas, Element.ALIGN_LEFT, phrase, 400, 428, -0);
    148.         // step 5
    149.         document.close();
    150.     }
    151. }

    3.3 使用ColumnText对象

    在文本模式下使用ColumnText

    在复合模式中使用ColumnText

    3.4 创建可重复使用的内容

    如何在文档重复添加image？PDF图片的字节存储在单独区域，页面包含一个图片的引用，指向external object（XObject）

    Image XObjects

    添加图片到顶层

    顶层的图片遮盖住文本：Foobar Film Festival

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Document;
    5. import com.itextpdf.text.DocumentException;
    6. import com.itextpdf.text.Element;
    7. import com.itextpdf.text.Font;
    8. import com.itextpdf.text.Image;
    9. import com.itextpdf.text.PageSize;
    10. import com.itextpdf.text.Paragraph;
    11. import com.itextpdf.text.Font.FontFamily;
    12. import com.itextpdf.text.pdf.PdfWriter;
    13.  
    14. public class ImageDirect {
    15.  
    16.     /** The resulting PDF. */
    17.     public static final String RESULT
    18.         = "D:/data/iText/inAction/chapter03/image_direct.pdf";
    19.     /** The movie poster. */
    20.     public static final String RESOURCE
    21.         = "E:/study/PDF/SourceCodeiText/itext-book/book/resources/img/loa.jpg";
    22.     
    23.     public static void main(String[] args)
    24.         throws IOException, DocumentException {
    25.     	// step 1
    26.         Document document
    27.             = new Document(PageSize.POSTCARD, 30, 30, 30, 30);
    28.         // step 2
    29.         PdfWriter writer
    30.             = PdfWriter.getInstance(document, new FileOutputStream(RESULT));
    31.         writer.setCompressionLevel(0);
    32.         // step 3
    33.         document.open();
    34.         // step 4
    35.         Image img = Image.getInstance(RESOURCE);
    36.         img.setAbsolutePosition((PageSize.POSTCARD.getWidth() - img.getScaledWidth()) / 2,
    37.                 (PageSize.POSTCARD.getHeight() - img.getScaledHeight()) / 2);
    38.         writer.getDirectContent().addImage(img);
    39.         Paragraph p = new Paragraph("Foobar Film Festival", new Font(FontFamily.HELVETICA, 22));
    40.         p.setAlignment(Element.ALIGN_CENTER);
    41.         document.add(p);
    42.         // step 5
    43.         document.close();
    44.     }
    45. }

    倾斜图片

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Document;
    5. import com.itextpdf.text.DocumentException;
    6. import com.itextpdf.text.Image;
    7. import com.itextpdf.text.PageSize;
    8. import com.itextpdf.text.pdf.PdfWriter;
    9.  
    10. public class ImageSkew {
    11.  
    12.     /** The resulting PDF. */
    13.     public static final String RESULT = "D:/data/iText/inAction/chapter03/image_skew.pdf";
    14.     /** The movie poster. */
    15.     public static final String RESOURCE = "E:/study/PDF/SourceCodeiText/itext-book/book/resources/img/loa.jpg";
    16.  
    17.     /**
    18.      * Main method.
    19.      *
    20.      * @param    args    no arguments needed
    21.      * @throws DocumentException 
    22.      * @throws IOException
    23.      */
    24.     public static void main(String[] args)
    25.         throws IOException, DocumentException {
    26.     	// step 1
    27.         Document document = new Document(PageSize.POSTCARD.rotate());
    28.         // step 2
    29.         PdfWriter writer = PdfWriter.getInstance(document,
    30.                 new FileOutputStream(RESULT));
    31.         writer.setCompressionLevel(0);
    32.         // step 3
    33.         document.open();
    34.         // step 4
    35.         Image img = Image.getInstance(RESOURCE);
    36.         // Add the image to the upper layer
    37.         writer.getDirectContent().addImage(img,
    38.             img.getWidth(), 0, 0.35f * img.getHeight(),
    39.             0.65f * img.getHeight(), 30, 30);
    40.         // step 5
    41.         document.close();
    42.     }
    43. }

    内嵌图片

    PdfWriter.getDirectContent().addImage(img, true)

    1. import java.io.FileOutputStream;
    2. import java.io.IOException;
    3.  
    4. import com.itextpdf.text.Document;
    5. import com.itextpdf.text.DocumentException;
    6. import com.itextpdf.text.Image;
    7. import com.itextpdf.text.PageSize;
    8. import com.itextpdf.text.pdf.PdfWriter;
    9.  
    10. public class ImageInline {
    11.  
    12.     /** The resulting PDF. */
    13.     public static final String RESULT
    14.         = "D:/data/iText/inAction/chapter03/image_inline.pdf";
    15.     /** The movie poster. */
    16.     public static final String RESOURCE
    17.         = "E:/study/PDF/SourceCodeiText/itext-book/book/resources/img/loa.jpg";
    18.  
    19.     /**
    20.      * Main method.
    21.      *
    22.      * @param    args    no arguments needed
    23.      * @throws DocumentException 
    24.      * @throws IOException
    25.      */
    26.     public static void main(String[] args)
    27.         throws IOException, DocumentException {
    28.     	// step 1
    29.         Document document = new Document(PageSize.POSTCARD, 30, 30, 30, 30);
    30.         // step 2
    31.         PdfWriter writer = PdfWriter.getInstance(document,
    32.                 new FileOutputStream(RESULT));
    33.         writer.setCompressionLevel(0);
    34.         // step 3
    35.         document.open();
    36.         // step 4
    37.         Image img = Image.getInstance(RESOURCE);
    38.         img.setAbsolutePosition(
    39.             (PageSize.POSTCARD.getWidth() - img.getScaledWidth()) / 2,
    40.             (PageSize.POSTCARD.getHeight() - img.getScaledHeight()) / 2);
    41.         writer.getDirectContent().addImage(img, true);
    42.         // step 5
    43.         document.close();
    44.     }
    45. }

    PdfTemplate 对象

    PdfTemplate：XObject的别称

    PdfTemplate是一个PDF内容流，它是任何图形对象的序列。PdfTemplate扩展PdfContentByte并继承所有其方法。

    1.         PdfContentByte canvas = writer.getDirectContent();
    2.         // Create the XObject
    3.         PdfTemplate celluloid = canvas.createTemplate(595, 84.2f);
    4.         celluloid.rectangle(8, 8, 579, 68);
    5.         for (float f = 8.25f; f < 581; f+= 6.5f) {
    6.             celluloid.roundRectangle(f, 8.5f, 6, 3, 1.5f);
    7.             celluloid.roundRectangle(f, 72.5f, 6, 3, 1.5f);
    8.         }
    9.         celluloid.setGrayFill(0.1f);
    10.         celluloid.eoFill();
    11.         // Write the XObject to the OutputStream
    12.         writer.releaseTemplate(celluloid);
    13.         // Add the XObject 10 times
    14.         for (int i = 0; i < 10; i++) {
    15.             canvas.addTemplate(celluloid, 0, i * 84.2f);
    16.         }
    17.         // Go to the next page
    18.         document.newPage();
    19.         // Add the XObject 10 times
    20.         for (int i = 0; i < 10; i++) {
    21.             canvas.addTemplate(celluloid, 0, i * 84.2f);
    22.         }

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  • 原文地址：https://blog.csdn.net/gqltt/article/details/132915083