spring boot pdf 拆分
1.其它文件请参照前面水印
2.请求参数
public class PdfSplitRequest {
private String pdfBase64;//要拆分pdf base64
private Integer cutePage;//每个文件的页数
}
{
"cutePage": 1,
"pdfBase64": ""
}
3.具体的拆分方法
public PdfSplitResponse splitPdf(PdfSplitRequest re) {
Random random = new Random();
Properties properties = System.getProperties();
String baseUrl = properties.getProperty("user.dir")+"\\src\\main\\resources\\pdf\\";
File dir = new File(baseUrl);
if(!dir.exists()){
dir.mkdirs();
}
String orgPdfPath = baseUrl + UUID.randomUUID().toString() + ".pdf";
GLFile.decryptByBase64(re.getPdfBase64(),orgPdfPath);
PdfDocument pdfDoc = null;
try {
pdfDoc = new PdfDocument(new PdfReader(orgPdfPath));
} catch (IOException e) {
e.printStackTrace();
}
ArrayList<Map<String,Integer>> pdfArrays = new ArrayList<>();
Integer pages = pdfDoc.getNumberOfPages();
for(int p = 1;p<= pages;){
Map<String,Integer> mPage = new HashMap<>();
mPage.put("fromPage",p);
mPage.put("toPage",p+re.getCutePage()-1);
pdfArrays.add(mPage);
p = p + re.getCutePage();
}
ArrayList<String> pdfBase64s = new ArrayList<>();
for(Map<String,Integer> mPage : pdfArrays){
String newPdfPath = baseUrl + UUID.randomUUID().toString() + ".pdf";
PdfDocument pdfDocument = null;
try {
pdfDocument = new PdfDocument(new PdfWriter(newPdfPath));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
pdfDoc.copyPagesTo(mPage.get("fromPage"),mPage.get("toPage"),pdfDocument);
pdfDocument.close();
String pdfStr = GLFile.encryptToBase64(newPdfPath);
pdfBase64s.add(pdfStr);
File newFile = new File(newPdfPath);
newFile.delete();
}
pdfDoc.close();
File orgFile = new File(orgPdfPath);
orgFile.delete();
PdfSplitResponse pdfSplitResponse = new PdfSplitResponse();
pdfSplitResponse.setCode(1);
pdfSplitResponse.setPdfs(pdfBase64s);
return pdfSplitResponse;
}
4.返回结果
{
"code": 1,
"apiCode": null,
"message": null,
"requestId": null,
"requestTime": null,
"pdfs": [
{"base64"},{"base64"}
]
