itext7学习笔记

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来源：https://blog.csdn.net/u012397189/category_9270695.html

itext7学习笔记——第4章实践&example

转x33g5p2x  于2021-12-28 转载在 其他  
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本章的例子，请参考我翻译的博文：itext7学习笔记——第4章,里面有详细的解释,有什么不懂得也可以评论或者私信我！

例子1：文本注释

在一个Paragraph之前添加最简单的文本注释，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.color.Color;
  3. import com.itextpdf.kernel.geom.Rectangle;
  4. import com.itextpdf.kernel.pdf.PdfDocument;
  5. import com.itextpdf.kernel.pdf.PdfString;
  6. import com.itextpdf.kernel.pdf.PdfWriter;
  7. import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
  8. import com.itextpdf.kernel.pdf.annot.PdfTextAnnotation;
  9. import com.itextpdf.layout.Document;
  10. import com.itextpdf.layout.element.Paragraph;
  12. import java.io.File;
  13. import java.io.IOException;
  15. /** * Simple text annotation example. */
  16. public class C04E01_01_TextAnnotation {
  18.     public static final String DEST = "results/chapter04/text_annotation.pdf";
  20.     public static void main(String args[]) throws IOException {
  21.         File file = new File(DEST);
  22.         file.getParentFile().mkdirs();
  23.         new C04E01_01_TextAnnotation().createPdf(DEST);
  24.     }
  26.     public void createPdf(String dest) throws IOException {
  28.         //Initialize PDF document
  29.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  31.         //Initialize document
  32.         Document document = new Document(pdf);
  33.         document.add(new Paragraph("The example of text annotation."));
  35.         //Create text annotation
  36.         PdfAnnotation ann = new PdfTextAnnotation(new Rectangle(20, 800, 0, 0))
  37.                 .setColor(Color.GREEN)
  38.                 .setTitle(new PdfString("iText"))
  39.                 .setContents("With iText, you can truly take your documentation needs to the next level.")
  40.                 .setOpen(true);
  41.         pdf.getFirstPage().addAnnotation(ann);
  43.         //Close document
  44.         document.close();
  46.     }
  47. }

例子2：链接注释

在”here”上面添加链接注释，并创建链接到itext官网，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.geom.Rectangle;
  3. import com.itextpdf.kernel.pdf.PdfDocument;
  4. import com.itextpdf.kernel.pdf.PdfWriter;
  5. import com.itextpdf.kernel.pdf.action.PdfAction;
  6. import com.itextpdf.kernel.pdf.annot.PdfLinkAnnotation;
  7. import com.itextpdf.layout.Document;
  8. import com.itextpdf.layout.element.Link;
  9. import com.itextpdf.layout.element.Paragraph;
  11. import java.io.File;
  12. import java.io.IOException;
  14. /** * Simple link annotation example. */
  15. public class C04E01_02_LinkAnnotation {
  17.     public static final String DEST = "results/chapter04/link_annotation.pdf";
  19.     public static void main(String args[]) throws IOException {
  20.         File file = new File(DEST);
  21.         file.getParentFile().mkdirs();
  22.         new C04E01_02_LinkAnnotation().createPdf(DEST);
  23.     }
  25.     public void createPdf(String dest) throws IOException {
  27.         //Initialize PDF document
  28.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  30.         //Initialize document
  31.         Document document = new Document(pdf);
  33.         //Create link annotation
  34.         PdfLinkAnnotation annotation = new PdfLinkAnnotation(new Rectangle(0, 0))
  35.                 .setAction(PdfAction.createURI("http://itextpdf.com/"));
  36.         Link link = new Link("here", annotation);
  37.         Paragraph p = new Paragraph("The example of link annotation. Click ")
  38.                 .add(link.setUnderline())
  39.                 .add(" to learn more...");
  40.         document.add(p);
  42.         //Close document
  43.         document.close();
  45.     }
  46. }

例子3：线注释

在一个pdf文档里面添加线注释，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.color.Color;
  3. import com.itextpdf.kernel.geom.Rectangle;
  4. import com.itextpdf.kernel.pdf.*;
  5. import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
  6. import com.itextpdf.kernel.pdf.annot.PdfLineAnnotation;
  8. import java.io.File;
  9. import java.io.IOException;
  11. /** * Simple line annotation example. */
  12. public class C04E01_03_LineAnnotation {
  14.     public static final String DEST = "results/chapter04/line_annotation.pdf";
  16.     public static void main(String args[]) throws IOException {
  17.         File file = new File(DEST);
  18.         file.getParentFile().mkdirs();
  19.         new C04E01_03_LineAnnotation().createPdf(DEST);
  20.     }
  22.     public void createPdf(String dest) throws IOException {
  24.         //Initialize PDF document
  25.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  26.         PdfPage page = pdf.addNewPage();
  28.         PdfArray lineEndings = new PdfArray();
  29.         lineEndings.add(new PdfName("Diamond"));
  30.         lineEndings.add(new PdfName("Diamond"));
  32.         //Create line annotation with inside caption
  33.         PdfAnnotation annotation = new PdfLineAnnotation(
  34.                 new Rectangle(0, 0),
  35.                 new float[]{20, 790, page.getPageSize().getWidth() - 20, 790})
  36.                 .setLineEndingStyles((lineEndings))
  37.                 .setContentsAsCaption(true)
  38.                 .setTitle(new PdfString("iText"))
  39.                 .setContents("The example of line annotation")
  40.                 .setColor(Color.BLUE);
  41.         page.addAnnotation(annotation);
  43.         //Close document
  44.         pdf.close();
  46.     }
  47. }

例子4：标记注释

在pdf里面创建标记注释，代码如下

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.color.Color;
  3. import com.itextpdf.kernel.geom.Rectangle;
  4. import com.itextpdf.kernel.pdf.PdfArray;
  5. import com.itextpdf.kernel.pdf.PdfDocument;
  6. import com.itextpdf.kernel.pdf.PdfString;
  7. import com.itextpdf.kernel.pdf.PdfWriter;
  8. import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
  9. import com.itextpdf.kernel.pdf.annot.PdfTextMarkupAnnotation;
  10. import com.itextpdf.layout.Document;
  11. import com.itextpdf.layout.element.Paragraph;
  12. import com.itextpdf.layout.property.TextAlignment;
  13. import com.itextpdf.layout.property.VerticalAlignment;
  15. import java.io.File;
  16. import java.io.IOException;
  18. /** * Simple text markup annotation example. */
  19. public class C04E01_04_TextMarkupAnnotation {
  21.     public static final String DEST = "results/chapter04/textmarkup_annotation.pdf";
  23.     public static void main(String args[]) throws IOException {
  24.         File file = new File(DEST);
  25.         file.getParentFile().mkdirs();
  26.         new C04E01_04_TextMarkupAnnotation().createPdf(DEST);
  27.     }
  29.     public void createPdf(String dest) throws IOException {
  31.         //Initialize PDF document
  32.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  34.         //Initialize document
  35.         Document document = new Document(pdf);
  37.         Paragraph p = new Paragraph("The example of text markup annotation.");
  38.         document.showTextAligned(p, 20, 795, 1, TextAlignment.LEFT,
  39.                 VerticalAlignment.MIDDLE, 0);
  41.         //Create text markup annotation
  42.         PdfAnnotation ann = PdfTextMarkupAnnotation.createHighLight(new Rectangle(105, 790, 64, 10),
  43.                 new float[]{169, 790, 105, 790, 169, 800, 105, 800})
  44.                 .setColor(Color.YELLOW)
  45.                 .setTitle(new PdfString("Hello!"))
  46.                 .setContents(new PdfString("I'm a popup."))
  47.                 .setTitle(new PdfString("iText"))
  48.                 .setOpen(true)
  49.                 .setRectangle(new PdfArray(new float[]{100, 600, 200, 100}));
  50.         pdf.getFirstPage().addAnnotation(ann);
  52.         //Close document
  53.         document.close();
  55.     }
  56. }

例子5：创建表单

在pdf里面创建工作信息表单，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.forms.PdfAcroForm;
  3. import com.itextpdf.forms.fields.PdfButtonFormField;
  4. import com.itextpdf.forms.fields.PdfChoiceFormField;
  5. import com.itextpdf.forms.fields.PdfFormField;
  6. import com.itextpdf.forms.fields.PdfTextFormField;
  7. import com.itextpdf.kernel.geom.PageSize;
  8. import com.itextpdf.kernel.geom.Rectangle;
  9. import com.itextpdf.kernel.pdf.PdfDocument;
  10. import com.itextpdf.kernel.pdf.PdfWriter;
  11. import com.itextpdf.kernel.pdf.action.PdfAction;
  12. import com.itextpdf.layout.Document;
  13. import com.itextpdf.layout.element.Paragraph;
  14. import com.itextpdf.layout.property.TextAlignment;
  16. import java.io.File;
  17. import java.io.IOException;
  19. /** * Simple widget annotation example. */
  20. public class C04E02_JobApplication {
  22.     public static final String DEST = "results/chapter04/job_application.pdf";
  24.     public static void main(String args[]) throws IOException {
  25.         File file = new File(DEST);
  26.         file.getParentFile().mkdirs();
  27.         new C04E02_JobApplication().createPdf(DEST);
  28.     }
  30.     public void createPdf(String dest) throws IOException {
  32.         //Initialize PDF document
  33.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  34.         PageSize ps = PageSize.A4;
  35.         pdf.setDefaultPageSize(ps);
  37.         // Initialize document
  38.         Document document = new Document(pdf);
  40.         C04E02_JobApplication.addAcroForm(document);
  42.         //Close document
  43.         document.close();
  45.     }
  47.     public static PdfAcroForm addAcroForm(Document doc) {
  49.         Paragraph title = new Paragraph("Application for employment")
  50.                 .setTextAlignment(TextAlignment.CENTER)
  51.                 .setFontSize(16);
  52.         doc.add(title);
  53.         doc.add(new Paragraph("Full name:").setFontSize(12));
  54.         doc.add(new Paragraph("Native language: English French German Russian Spanish").setFontSize(12));
  55.         doc.add(new Paragraph("Experience in: cooking driving software development").setFontSize(12));
  56.         doc.add(new Paragraph("Preferred working shift:").setFontSize(12));
  57.         doc.add(new Paragraph("Additional information:").setFontSize(12));
  59.         //Add acroform
  60.         PdfAcroForm form = PdfAcroForm.getAcroForm(doc.getPdfDocument(), true);
  62.         //Create text field
  63.         PdfTextFormField nameField = PdfTextFormField.createText(doc.getPdfDocument(),
  64.                 new Rectangle(99, 753, 425, 15), "name", "");
  65.         form.addField(nameField);
  67.         //Create radio buttons
  68.         PdfButtonFormField group = PdfFormField.createRadioGroup(doc.getPdfDocument(), "language", "");
  69.         PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(130, 728, 15, 15), group, "English");
  70.         PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(200, 728, 15, 15), group, "French");
  71.         PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(260, 728, 15, 15), group, "German");
  72.         PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(330, 728, 15, 15), group, "Russian");
  73.         PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(400, 728, 15, 15), group, "Spanish");
  74.         form.addField(group);
  76.         //Create checkboxes
  77.         for (int i = 0; i < 3; i++) {
  78.             PdfButtonFormField checkField = PdfFormField.createCheckBox(doc.getPdfDocument(), new Rectangle(119 + i * 69, 701, 15, 15),
  79.                     "experience".concat(String.valueOf(i+1)), "Off", PdfFormField.TYPE_CHECK);
  80.             form.addField(checkField);
  81.         }
  83.         //Create combobox
  84.         String[] options = {"Any", "6.30 am - 2.30 pm", "1.30 pm - 9.30 pm"};
  85.         PdfChoiceFormField choiceField = PdfFormField.createComboBox(doc.getPdfDocument(), new Rectangle(163, 676, 115, 15),
  86.                 "shift", "Any", options);
  87.         form.addField(choiceField);
  89.         //Create multiline text field
  90.         PdfTextFormField infoField = PdfTextFormField.createMultilineText(doc.getPdfDocument(),
  91.                 new Rectangle(158, 625, 366, 40), "info", "");
  92.         form.addField(infoField);
  94.         //Create push button field
  95.         PdfButtonFormField button = PdfFormField.createPushButton(doc.getPdfDocument(),
  96.                 new Rectangle(479, 594, 45, 15), "reset", "RESET");
  97.         button.setAction(PdfAction.createResetForm(new String[] {"name", "language", "experience1", "experience2", "experience3", "shift", "info"}, 0));
  98.         form.addField(button);
  100.         return form;
  102.     }
  103. }

例子6：填充表单

创建完表单以后，填充表单内容，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.forms.PdfAcroForm;
  3. import com.itextpdf.forms.fields.PdfFormField;
  4. import com.itextpdf.kernel.pdf.PdfDocument;
  5. import com.itextpdf.kernel.pdf.PdfWriter;
  6. import com.itextpdf.layout.Document;
  8. import java.io.File;
  9. import java.io.IOException;
  10. import java.util.Map;
  12. /** * Simple filling out form example. */
  13. public class C04E03_CreateAndFill {
  15.     public static final String DEST = "results/chapter04/create_and_fill.pdf";
  17.     public static void main(String args[]) throws IOException {
  18.         File file = new File(DEST);
  19.         file.getParentFile().mkdirs();
  20.         new C04E03_CreateAndFill().createPdf(DEST);
  21.     }
  23.     public void createPdf(String dest) throws IOException {
  25.         //Initialize PDF document
  26.         PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
  28.         // Initialize document
  29.         Document doc = new Document(pdf);
  31.         PdfAcroForm form = C04E02_JobApplication.addAcroForm(doc);
  32.         Map<String, PdfFormField> fields = form.getFormFields();
  33.         fields.get("name").setValue("James Bond");
  34.         fields.get("language").setValue("English");
  35.         fields.get("experience1").setValue("Off");
  36.         fields.get("experience2").setValue("Yes");
  37.         fields.get("experience3").setValue("Yes");
  38.         fields.get("shift").setValue("Any");
  39.         fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");
  41.         doc.close();
  43.     }
  44. }

例子7：预填充表单

打开已存在的pdf，预填充表单内容，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.pdf.PdfDocument;
  3. import com.itextpdf.kernel.pdf.PdfReader;
  4. import com.itextpdf.kernel.pdf.PdfWriter;
  5. import com.itextpdf.forms.PdfAcroForm;
  6. import com.itextpdf.forms.fields.PdfFormField;
  8. import java.io.*;
  9. import java.util.Map;
  11. /** * Simple filling out form example. */
  12. public class C04E04_FillForm {
  14.     public static final String SRC = "src/main/resources/pdf/job_application.pdf";
  15.     public static final String DEST = "results/chapter04/fill_form.pdf";
  17.     public static void main(String args[]) throws IOException {
  18.         File file = new File(DEST);
  19.         file.getParentFile().mkdirs();
  20.         new C04E04_FillForm().manipulatePdf(SRC, DEST);
  21.     }
  23.     public void manipulatePdf(String src, String dest) throws IOException {
  25.         //Initialize PDF document
  26.         PdfDocument pdf = new PdfDocument(new PdfReader(src), new PdfWriter(dest));
  28.         PdfAcroForm form = PdfAcroForm.getAcroForm(pdf, true);
  29.         Map<String, PdfFormField> fields = form.getFormFields();
  30.         fields.get("name").setValue("James Bond");
  31.         fields.get("language").setValue("English");
  32.         fields.get("experience1").setValue("Off");
  33.         fields.get("experience2").setValue("Yes");
  34.         fields.get("experience3").setValue("Yes");
  35.         fields.get("shift").setValue("Any");
  36.         fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");
  38.         pdf.close();
  40.     }
  41. }

例子8：锁定表单

打开已存在的pdf，锁定表单填充的内容，使之不能被编辑，代码如下：

  1. /** * Created by ASUS on 2017/9/12. */
  2. import com.itextpdf.kernel.pdf.PdfDocument;
  3. import com.itextpdf.kernel.pdf.PdfReader;
  4. import com.itextpdf.kernel.pdf.PdfWriter;
  5. import com.itextpdf.forms.PdfAcroForm;
  6. import com.itextpdf.forms.fields.PdfFormField;
  8. import java.io.*;
  9. import java.util.Map;
  11. /** * Simple filling out form example. */
  12. public class C04E05_FlattenForm {
  14.     public static final String SRC = "src/main/resources/pdf/job_application.pdf";
  15.     public static final String DEST = "results/chapter04/flatten_form.pdf";
  17.     public static void main(String args[]) throws IOException {
  18.         File file = new File(DEST);
  19.         file.getParentFile().mkdirs();
  20.         new C04E05_FlattenForm().manipulatePdf(SRC, DEST);
  21.     }
  23.     public void manipulatePdf(String src, String dest) throws IOException {
  25.         //Initialize PDF document
  26.         PdfDocument pdf = new PdfDocument(new PdfReader(src), new PdfWriter(dest));
  28.         PdfAcroForm form = PdfAcroForm.getAcroForm(pdf, true);
  29.         Map<String, PdfFormField> fields = form.getFormFields();
  30.         fields.get("name").setValue("James Bond");
  31.         fields.get("language").setValue("English");
  32.         fields.get("experience1").setValue("Off");
  33.         fields.get("experience2").setValue("Yes");
  34.         fields.get("experience3").setValue("Yes");
  35.         fields.get("shift").setValue("Any");
  36.         fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");
  37.         form.flattenFields();
  39.         pdf.close();
  41.     }
  42. }

Example代码下载

本章代码可在如下地址下载（IDEA工程）：iText7——第四章源代码工程

版权说明 : 本文为转载文章, 版权归原作者所有 版权申明

原文链接 : https://blog.csdn.net/u012397189/article/details/77945763

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