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：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfString;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
import com.itextpdf.kernel.pdf.annot.PdfTextAnnotation;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

import java.io.File;
import java.io.IOException;

/** * Simple text annotation example. */
public class C04E01_01_TextAnnotation {

    public static final String DEST = "results/chapter04/text_annotation.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E01_01_TextAnnotation().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));

        //Initialize document
        Document document = new Document(pdf);
        document.add(new Paragraph("The example of text annotation."));

        //Create text annotation
        PdfAnnotation ann = new PdfTextAnnotation(new Rectangle(20, 800, 0, 0))
                .setColor(Color.GREEN)
                .setTitle(new PdfString("iText"))
                .setContents("With iText, you can truly take your documentation needs to the next level.")
                .setOpen(true);
        pdf.getFirstPage().addAnnotation(ann);

        //Close document
        document.close();

    }
}

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：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.action.PdfAction;
import com.itextpdf.kernel.pdf.annot.PdfLinkAnnotation;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Link;
import com.itextpdf.layout.element.Paragraph;

import java.io.File;
import java.io.IOException;

/** * Simple link annotation example. */
public class C04E01_02_LinkAnnotation {

    public static final String DEST = "results/chapter04/link_annotation.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E01_02_LinkAnnotation().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));

        //Initialize document
        Document document = new Document(pdf);

        //Create link annotation
        PdfLinkAnnotation annotation = new PdfLinkAnnotation(new Rectangle(0, 0))
                .setAction(PdfAction.createURI("http://itextpdf.com/"));
        Link link = new Link("here", annotation);
        Paragraph p = new Paragraph("The example of link annotation. Click ")
                .add(link.setUnderline())
                .add(" to learn more...");
        document.add(p);

        //Close document
        document.close();

    }
}

例子3：线注释

在一个pdf文档里面添加线注释，代码如下：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.*;
import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
import com.itextpdf.kernel.pdf.annot.PdfLineAnnotation;

import java.io.File;
import java.io.IOException;

/** * Simple line annotation example. */
public class C04E01_03_LineAnnotation {

    public static final String DEST = "results/chapter04/line_annotation.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E01_03_LineAnnotation().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
        PdfPage page = pdf.addNewPage();

        PdfArray lineEndings = new PdfArray();
        lineEndings.add(new PdfName("Diamond"));
        lineEndings.add(new PdfName("Diamond"));

        //Create line annotation with inside caption
        PdfAnnotation annotation = new PdfLineAnnotation(
                new Rectangle(0, 0),
                new float[]{20, 790, page.getPageSize().getWidth() - 20, 790})
                .setLineEndingStyles((lineEndings))
                .setContentsAsCaption(true)
                .setTitle(new PdfString("iText"))
                .setContents("The example of line annotation")
                .setColor(Color.BLUE);
        page.addAnnotation(annotation);

        //Close document
        pdf.close();

    }
}

例子4：标记注释

在pdf里面创建标记注释，代码如下

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfArray;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfString;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.annot.PdfAnnotation;
import com.itextpdf.kernel.pdf.annot.PdfTextMarkupAnnotation;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.layout.property.VerticalAlignment;

import java.io.File;
import java.io.IOException;

/** * Simple text markup annotation example. */
public class C04E01_04_TextMarkupAnnotation {

    public static final String DEST = "results/chapter04/textmarkup_annotation.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E01_04_TextMarkupAnnotation().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));

        //Initialize document
        Document document = new Document(pdf);

        Paragraph p = new Paragraph("The example of text markup annotation.");
        document.showTextAligned(p, 20, 795, 1, TextAlignment.LEFT,
                VerticalAlignment.MIDDLE, 0);

        //Create text markup annotation
        PdfAnnotation ann = PdfTextMarkupAnnotation.createHighLight(new Rectangle(105, 790, 64, 10),
                new float[]{169, 790, 105, 790, 169, 800, 105, 800})
                .setColor(Color.YELLOW)
                .setTitle(new PdfString("Hello!"))
                .setContents(new PdfString("I'm a popup."))
                .setTitle(new PdfString("iText"))
                .setOpen(true)
                .setRectangle(new PdfArray(new float[]{100, 600, 200, 100}));
        pdf.getFirstPage().addAnnotation(ann);

        //Close document
        document.close();

    }
}

例子5：创建表单

在pdf里面创建工作信息表单，代码如下：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfButtonFormField;
import com.itextpdf.forms.fields.PdfChoiceFormField;
import com.itextpdf.forms.fields.PdfFormField;
import com.itextpdf.forms.fields.PdfTextFormField;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.action.PdfAction;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;

import java.io.File;
import java.io.IOException;

/** * Simple widget annotation example. */
public class C04E02_JobApplication {

    public static final String DEST = "results/chapter04/job_application.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E02_JobApplication().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
        PageSize ps = PageSize.A4;
        pdf.setDefaultPageSize(ps);

        // Initialize document
        Document document = new Document(pdf);

        C04E02_JobApplication.addAcroForm(document);

        //Close document
        document.close();

    }

    public static PdfAcroForm addAcroForm(Document doc) {

        Paragraph title = new Paragraph("Application for employment")
                .setTextAlignment(TextAlignment.CENTER)
                .setFontSize(16);
        doc.add(title);
        doc.add(new Paragraph("Full name:").setFontSize(12));
        doc.add(new Paragraph("Native language: English French German Russian Spanish").setFontSize(12));
        doc.add(new Paragraph("Experience in: cooking driving software development").setFontSize(12));
        doc.add(new Paragraph("Preferred working shift:").setFontSize(12));
        doc.add(new Paragraph("Additional information:").setFontSize(12));

        //Add acroform
        PdfAcroForm form = PdfAcroForm.getAcroForm(doc.getPdfDocument(), true);

        //Create text field
        PdfTextFormField nameField = PdfTextFormField.createText(doc.getPdfDocument(),
                new Rectangle(99, 753, 425, 15), "name", "");
        form.addField(nameField);

        //Create radio buttons
        PdfButtonFormField group = PdfFormField.createRadioGroup(doc.getPdfDocument(), "language", "");
        PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(130, 728, 15, 15), group, "English");
        PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(200, 728, 15, 15), group, "French");
        PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(260, 728, 15, 15), group, "German");
        PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(330, 728, 15, 15), group, "Russian");
        PdfFormField.createRadioButton(doc.getPdfDocument(), new Rectangle(400, 728, 15, 15), group, "Spanish");
        form.addField(group);

        //Create checkboxes
        for (int i = 0; i < 3; i++) {
            PdfButtonFormField checkField = PdfFormField.createCheckBox(doc.getPdfDocument(), new Rectangle(119 + i * 69, 701, 15, 15),
                    "experience".concat(String.valueOf(i+1)), "Off", PdfFormField.TYPE_CHECK);
            form.addField(checkField);
        }

        //Create combobox
        String[] options = {"Any", "6.30 am - 2.30 pm", "1.30 pm - 9.30 pm"};
        PdfChoiceFormField choiceField = PdfFormField.createComboBox(doc.getPdfDocument(), new Rectangle(163, 676, 115, 15),
                "shift", "Any", options);
        form.addField(choiceField);

        //Create multiline text field
        PdfTextFormField infoField = PdfTextFormField.createMultilineText(doc.getPdfDocument(),
                new Rectangle(158, 625, 366, 40), "info", "");
        form.addField(infoField);

        //Create push button field
        PdfButtonFormField button = PdfFormField.createPushButton(doc.getPdfDocument(),
                new Rectangle(479, 594, 45, 15), "reset", "RESET");
        button.setAction(PdfAction.createResetForm(new String[] {"name", "language", "experience1", "experience2", "experience3", "shift", "info"}, 0));
        form.addField(button);

        return form;

    }
}

例子6：填充表单

创建完表单以后，填充表单内容，代码如下：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfFormField;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;

import java.io.File;
import java.io.IOException;
import java.util.Map;

/** * Simple filling out form example. */
public class C04E03_CreateAndFill {

    public static final String DEST = "results/chapter04/create_and_fill.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E03_CreateAndFill().createPdf(DEST);
    }

    public void createPdf(String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfWriter(dest));

        // Initialize document
        Document doc = new Document(pdf);

        PdfAcroForm form = C04E02_JobApplication.addAcroForm(doc);
        Map<String, PdfFormField> fields = form.getFormFields();
        fields.get("name").setValue("James Bond");
        fields.get("language").setValue("English");
        fields.get("experience1").setValue("Off");
        fields.get("experience2").setValue("Yes");
        fields.get("experience3").setValue("Yes");
        fields.get("shift").setValue("Any");
        fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");

        doc.close();

    }
}

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：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfFormField;

import java.io.*;
import java.util.Map;

/** * Simple filling out form example. */
public class C04E04_FillForm {

    public static final String SRC = "src/main/resources/pdf/job_application.pdf";
    public static final String DEST = "results/chapter04/fill_form.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E04_FillForm().manipulatePdf(SRC, DEST);
    }

    public void manipulatePdf(String src, String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfReader(src), new PdfWriter(dest));

        PdfAcroForm form = PdfAcroForm.getAcroForm(pdf, true);
        Map<String, PdfFormField> fields = form.getFormFields();
        fields.get("name").setValue("James Bond");
        fields.get("language").setValue("English");
        fields.get("experience1").setValue("Off");
        fields.get("experience2").setValue("Yes");
        fields.get("experience3").setValue("Yes");
        fields.get("shift").setValue("Any");
        fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");

        pdf.close();

    }
}

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：

/** * Created by ASUS on 2017/9/12. */
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.forms.PdfAcroForm;
import com.itextpdf.forms.fields.PdfFormField;

import java.io.*;
import java.util.Map;

/** * Simple filling out form example. */
public class C04E05_FlattenForm {

    public static final String SRC = "src/main/resources/pdf/job_application.pdf";
    public static final String DEST = "results/chapter04/flatten_form.pdf";

    public static void main(String args[]) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new C04E05_FlattenForm().manipulatePdf(SRC, DEST);
    }

    public void manipulatePdf(String src, String dest) throws IOException {

        //Initialize PDF document
        PdfDocument pdf = new PdfDocument(new PdfReader(src), new PdfWriter(dest));

        PdfAcroForm form = PdfAcroForm.getAcroForm(pdf, true);
        Map<String, PdfFormField> fields = form.getFormFields();
        fields.get("name").setValue("James Bond");
        fields.get("language").setValue("English");
        fields.get("experience1").setValue("Off");
        fields.get("experience2").setValue("Yes");
        fields.get("experience3").setValue("Yes");
        fields.get("shift").setValue("Any");
        fields.get("info").setValue("I was 38 years old when I became an MI6 agent.");
        form.flattenFields();

        pdf.close();

    }
}

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

内容来源于网络，如有侵权，请联系作者删除！

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