1.在pom.xml加入依赖

<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>1.8.11</version>
</dependency>

2.测试代码：

package api.api;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import com.lowagie.text.pdf.PdfReader;

public class PdfPageTest {
public static void main(String[] args) throws FileNotFoundException, IOException {
File file = new File("d:\\PRE-CON281100007-add-1546498235473.pdf");
PdfReader pdfReader = new PdfReader(new FileInputStream(file));
int pages = pdfReader.getNumberOfPages();
System.out.println("pdf文件的总页数为:" + pages);
}
}