Java 在PDF中添加页面跳转按钮功能(代码演示)

import com.spire.pdf.*;
import com.spire.pdf.actions.*;
import com.spire.pdf.fields.PdfButtonField;
import com.spire.pdf.general.PdfDestination;
import com.spire.pdf.graphics.PdfRGBColor;
import com.spire.pdf.graphics.PdfTrueTypeFont;
import java.awt.*;
import java.awt.geom.Rectangle2D;
public class Buttons {
  public static void main(String[]args) throws Exception{
    //创建文档，添加页面
    PdfDocument pdf = new PdfDocument();
    pdf.loadFromFile("test.pdf");
    //分别获取第一页、第二页及最后一页
    PdfPageBase page0 = pdf.getPages().get(0);
    PdfPageBase page1 = pdf.getPages().get(1);
    PdfPageBase page2 = pdf.getPages().get(pdf.getPages().getCount()-1);
    //设置允许创建窗体
    pdf.setAllowCreateForm(true);
    //定义float变量来确定按钮的位置及大小
    float x = 480;
    float y = 750;
    float width = 70;
    float height = 23;
    //创建truetype字体
    PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("楷体", Font.PLAIN, 9), true);
    //创建按钮0跳转到最后一页
    PdfButtonField btn_0 = new PdfButtonField(page0, "btn_0");
    Rectangle2D.Float rect = new Rectangle2D.Float(x, y + 15, width, height);
    btn_0.setBounds(rect);
    btn_0.setFont(font);
    btn_0.setText("跳转至最后一页");
    btn_0.setBackColor(new PdfRGBColor(245,245,245));
    btn_0.setForeColor(new PdfRGBColor(Color.black));
    btn_0.setBorderColor(new PdfRGBColor(Color.white));
    PdfNamedAction namedAction = new PdfNamedAction(PdfActionDestination.LastPage);
    btn_0.getActions().setMouseDown(namedAction);
    pdf.getForm().getFields().add(btn_0);
    //创建按钮1跳转到上一页
    PdfButtonField btn_1 = new PdfButtonField(page1, "btn_1");
    rect = new Rectangle2D.Float(x, y, width, height);
    btn_1.setBounds(rect);
    btn_1.setFont(font);
    btn_1.setText("上一页");
    btn_1.setBackColor(new PdfRGBColor(Color.white));
    btn_1.setForeColor(new PdfRGBColor(Color.black));
    btn_1.setBorderColor(new PdfRGBColor(245,245,245));
    namedAction = new PdfNamedAction(PdfActionDestination.PrevPage);
    btn_1.getActions().setMouseDown(namedAction);
    pdf.getForm().getFields().add(btn_1);
    //创建按钮2跳转下一页
    PdfButtonField btn_2 = new PdfButtonField(page1, "btn_2");
    rect = new Rectangle2D.Float(x, y + height + 5, width, height);
    btn_2.setBounds(rect);
    btn_2.setFont(font);
    btn_2.setText("下一页");
    btn_2.setBackColor(new PdfRGBColor(245,245,245));
    btn_2.setForeColor(new PdfRGBColor(Color.black));
    btn_2.setBorderColor(new PdfRGBColor(Color.white));
    namedAction = new PdfNamedAction(PdfActionDestination.NextPage);
    btn_2.getActions().setMouseDown(namedAction);
    pdf.getForm().getFields().add(btn_2);
    //创建按钮3跳转到首页
    PdfButtonField btn_3 = new PdfButtonField(page2, "btn_3");
    rect = new Rectangle2D.Float(x, 60, width, height);
    btn_3.setBounds(rect);
    btn_3.setFont(font);
    btn_3.setText("返回首页");
    btn_3.setBackColor(new PdfRGBColor(245,245,245));
    btn_3.setForeColor(new PdfRGBColor(Color.black));
    btn_3.setBorderColor(new PdfRGBColor(Color.white));
    namedAction = new PdfNamedAction(PdfActionDestination.FirstPage);
    btn_3.getActions().setMouseDown(namedAction);
    pdf.getForm().getFields().add(btn_3);
    //创建按钮4跳转到指定页
    PdfButtonField btn_4 = new PdfButtonField(page2, "btn_4");
    rect = new Rectangle2D.Float( x,90 , width, height);
    btn_4.setBounds(rect);
    btn_4.setText("跳转至第二页");
    btn_4.setFont(font);
    btn_4.setBackColor(new PdfRGBColor(Color.white));
    btn_4.setForeColor(new PdfRGBColor(Color.black));
    btn_4.setBorderColor(new PdfRGBColor(245,245,245));
    PdfGoToAction goToAction = new PdfGoToAction(new PdfDestination(pdf.getPages().get(1)));
    btn_4.getActions().setMouseDown(goToAction);
    pdf.getForm().getFields().add(btn_4);
    //保存文档
    pdf.saveToFile("NavigationButton.pdf", FileFormat.PDF);
    pdf.close();
  }
}