我需要使用 iText 生成 PDF,也需要使用 ajax。我给了一个按钮,当点击时,我必须弹出一个保存 pdf 文件的弹出窗口,因为通常我们会收到许多可下载的文件。我在代码中没有发现任何错误,请查看代码并帮助我。我必须打印一个简单的表格,其中包含我无法做到的行和列。
阿贾克斯编码:
function getFocusedPDF(){
alert("Inside create PDF ajax");
$.ajax({
url : '/PreTestWeb/getFocusedPDF',
type : 'get',
dataType : 'json',
contentType : 'application/json',
success : function(map) {
console.log(map);
},
error : function(map) {
alert(map);
alert("error occured!!!");
},
});
}
家庭控制器:
@RequestMapping(value = "/getFocusedPDF", method = RequestMethod.GET)
public void getRecentFocusGrpData(HttpServletRequest req, HttpServletResponse res) throws IOException, DocumentException {
String contType="application/pdf";
res.setContentType(contType);
Gson json = new Gson();
System.out.println("Inside home ctrlr");
PdfGenerator pdf=new PdfGenerator();
System.out.println("==== Before ===");
byte[] b=pdf.createFirstTable();
System.out.println("==== After ===");
res.setHeader("Content-Disposition",
"attachment; filename=pdf.pdf");
res.setContentLength(b.length);
res.getOutputStream().write(b);
res.getOutputStream().flush();
res.getOutputStream().close();
System.out.println("Last line in home ctrlr pdf generation");
}
createFirstTable:(方法)
public static byte[] createFirstTable() throws DocumentException, FileNotFoundException {
System.out.println("=========Inside pdf generator ==========");
// a table with three columns
ByteArrayOutputStream outputStream = new ByteArrayOutputStream(1024);
Document document=new Document();
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
writer.setCloseStream(false);
document.open();
PdfPTable table = new PdfPTable(2);// new PdfTable(periodList.size() + 1);
// the cell object
PdfPCell cell = new PdfPCell(new Paragraph ("Merry Moore"));
cell.setColspan(2);
table.addCell(cell);
System.out.println("Added new paragraph");
// now we add a cell with rowspan 2
cell = new PdfPCell(new Phrase("Cell with rowspan 2"));
cell.setColspan(2);
table.addCell(cell);
System.out.println("Added new cell");
// we add the four remaining cells with addCell()
table.addCell("row 1; cell 1");
table.addCell("row 1; cell 2");
table.addCell("row 2; cell 1");
table.addCell("row 2; cell 2");
document.add(table);
System.out.println("Added table to document");
document.close();
return outputStream.toByteArray();
}