分兩步
1。//前提是需要加itext.jar
maven配置
<dependency>
<groupId>com.lowagie</groupId>
<artifactId>itext</artifactId>
</dependency>
2。//說明 data單個需要拆分的文件流
//from 從第幾頁 end第幾頁爲一個文件
//savepath 拆分後保存的文件
public static String splitFile(String savepath,byte[] data, Integer from,Integer end){
Document document = null;
PdfCopy copy = null;
try {
PdfReader reader = new PdfReader(data);
int n = reader.getNumberOfPages();
if(end==0){
end = n;
}
List<String> savepaths = new ArrayList<String>();
// int a = pdfFile.lastIndexOf(".pdf");
//String staticpath = pdfFile.substring(0, a);
// String savepath = staticpath+ "_from_"+from+"_to_"+end+"_.pdf";
savepaths.add(savepath);
document = new Document(reader.getPageSize(1));
copy = new PdfCopy(document, new FileOutputStream(savepaths.get(0)));
document.open();
for(int j=from; j<=end; j++) {
document.newPage();
PdfImportedPage page = copy.getImportedPage(reader, j);
copy.addPage(page);
}
document.close();
return savepath;
} catch (IOException e) {
// logger.error("split pdf file error:{}",e.getMessage(),e);
return null;
} catch(DocumentException e) {
// logger.error("split pdf file error:{}",e.getMessage(),e);
return null;
}
}