itext7学习笔记——第4章实践&example

    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6：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