pdf拆分

依赖:

 <dependency> 
         <groupId>org.apache.pdfbox</groupId> 
         <artifactId>pdfbox</artifactId> 
         <version>2.0.1</version> 
      </dependency>

util,非常简单方便

package com.test;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageTree;

public class PdfSplit {
	/**
	 * 文件所在文件夹
	 */
	public static final String PATH = "C:\\Users\\east\\Desktop\\";
	/**
	 * 文件的名字
	 */
	public static final String NAME = "my";
	/**
	 * 文件的后缀
	 */
	public static final String EXT = ".pdf";
	
	
	public static void main(String[] args) throws IOException {
		PDDocument document = PDDocument.load(new File(PATH+NAME+EXT));
		
		PDPageTree tree = document.getPages();
		Iterator<PDPage> iterator = tree.iterator();
		
		List<PDDocument> pds = new ArrayList<>();
		PDDocument pdDocument = new PDDocument();
		int i = 0;
		
		while(true) {
			i ++ ;
			if (iterator.hasNext()) {
				/**
				 * 每100页一个文件,命名为    my_1.pdf/my_2.pdf
				 */
				if (i >= 100) {
					i = 0;
					pds.add(pdDocument);
					pdDocument.save(PATH+NAME+"_"+pds.size()+EXT);
					pdDocument.close();
					pdDocument = new PDDocument();
				}else {
					PDPage page = iterator.next();
					pdDocument.addPage(page);
				}
				
			}else {
				//最后剩下不足100页的也保存起来
				pds.add(pdDocument);
				pdDocument.save(PATH+NAME+"_"+pds.size()+EXT);
				pdDocument.close();
				break;
			}
			
		}
		document.close();
		
		
		
	}
}

但是,郁闷的是,这个拆分完体积没有变小.不知怎么办