我已经使用 IText 库创建了 pdf 现在我希望当用户单击按钮时，它应该向用户提示一个保存对话框，以允许浏览目标位置来存储文件。
现在我的代码看起来像
Document document = new Document();
try {
FacesContext context = FacesContext.getCurrentInstance();
HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
response.reset();
response.setContentType("application/pdf");
response.setHeader("Content-Disposition", "attachment; filename=ABC.pdf");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
response.setHeader("Pragma", "No-cache");
PdfWriter.getInstance(document, response.getOutputStream());
document.addTitle("Form");
document.addSubject("Form");
document.open();
Paragraph paragraph12 = new Paragraph("FORM",
FontFactory.getFont(FontFactory.HELVETICA,
18, Font.BOLD, new CMYKColor(0, 255, 255, 17)));
Chapter chapter1 = new Chapter(paragraph12, 1);
paragraph12.setSpacingAfter(25);
paragraph12.setAlignment(Element.ALIGN_CENTER);
document.add(paragraph12);
// Centered
Chunk underline = new Chunk(AppNo);
underline.setUnderline(0.2f, -2f);
Paragraph paragraph = new Paragraph("Application No:");
paragraph.add(underline);
paragraph.setAlignment(Element.ALIGN_LEFT);
paragraph.setSpacingAfter(20);
document.add(paragraph);
// Left
paragraph = new Paragraph("To,");
paragraph.setAlignment(Element.ALIGN_LEFT);
document.add(paragraph);
// Left with indentation
paragraph = new Paragraph(
"");
paragraph.setAlignment(Element.ALIGN_LEFT);
document.add(paragraph);
Paragraph paragraph2 = new Paragraph(
"Subject: ");
paragraph2.setSpacingAfter(15);
paragraph2.setSpacingBefore(15);
paragraph2.setAlignment(Element.ALIGN_LEFT);
paragraph2.setIndentationRight(50);
document.add(paragraph2);
Paragraph paragraph3 = new Paragraph("I ");
String laName=deaclarationOpr.getDeclarationDetailsobj()
.getLaName();
if(laName!=null){
Chunk name = new Chunk(laName);
name.setUnderline(0.2f, -2f);
paragraph3.add(name);
}
paragraph3.add(" request you to process the Application ");
paragraph3.add(underline);
paragraph3.add(" for product ");
String productName=deaclarationOpr
.getDeclarationDetailsobj().getProductName();
if(productName!=null){
Chunk product = new Chunk(productName);
product.setUnderline(0.2f, -2f);
paragraph3.add(product);
}
paragraph3
.add("");
paragraph3.setSpacingAfter(15);
paragraph3.setSpacingBefore(15);
paragraph3.setAlignment(Element.ALIGN_LEFT);
paragraph3.setIndentationLeft(50);
paragraph3.setIndentationRight(50);
document.add(paragraph3);
Paragraph paragraph4 = new Paragraph(
"");
String code=deaclarationOpr
.getDeclarationDetailsobj().getAdvisorCode();
if(code!=null){
Chunk advisorCode = new Chunk(code);
advisorCode.setUnderline(0.2f, -2f);
paragraph4.add(advisorCode);
}
paragraph4
.add("");
paragraph4.setSpacingAfter(15);
paragraph4.setSpacingBefore(15);
paragraph4.setAlignment(Element.ALIGN_LEFT);
paragraph4.setIndentationLeft(50);
paragraph4.setIndentationRight(50);
document.add(paragraph4);
Paragraph paragraph5 = new Paragraph(
"");
paragraph5.setSpacingAfter(15);
paragraph5.setSpacingBefore(15);
paragraph5.setAlignment(Element.ALIGN_LEFT);
paragraph5.setIndentationLeft(50);
paragraph3.setIndentationRight(50);
document.add(paragraph5);
Paragraph paragraph6 = new Paragraph(
"");
paragraph6.setSpacingAfter(15);
paragraph6.setSpacingBefore(15);
paragraph6.setAlignment(Element.ALIGN_LEFT);
paragraph6.setIndentationLeft(50);
paragraph6.setIndentationRight(50);
document.add(paragraph6);
Paragraph paragraph7 = new Paragraph("Date: ");
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
// get current date time with Date()
Date date = new Date();
paragraph7.add(dateFormat.format(date));
paragraph7.setSpacingBefore(15);
paragraph7.setIndentationLeft(50);
paragraph7.setIndentationRight(50);
paragraph7.setAlignment(Element.ALIGN_LEFT);
document.add(paragraph7);
Paragraph paragraph8 = new Paragraph("Name of the Proposer: ");
String propoer=deaclarationOpr
.getDeclarationDetailsobj().getProposerName();
if(propoer!=null){
Chunk proposerName = new Chunk(propoer);
proposerName.setUnderline(0.2f, -2f);
paragraph8.add(proposerName);
}
paragraph8.setAlignment(Element.ALIGN_LEFT);
paragraph8.setIndentationLeft(50);
paragraph8.setIndentationRight(50);
document.add(paragraph8);
Paragraph paragraph9 = new Paragraph("Place: ");
paragraph9.setIndentationLeft(50);
paragraph9.setIndentationRight(50);
paragraph9.setAlignment(Element.ALIGN_LEFT);
document.add(paragraph9);
document.close();
context.responseComplete(); } catch (FileNotFoundException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); } catch (DocumentException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); }
以下过滤器在 web.xml 中定义
<filter>
<display-name>RichFaces Filter</display-name>
<filter-name>richfaces</filter-name>
<filter-class>org.ajax4jsf.Filter</filter-class>
<init-param>
<param-name>createTempFiles</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>maxRequestSize</param-name>
<param-value>20000000</param-value>
</init-param>
<init-param>
<param-name>enable-cache</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>richfaces</filter-name>
<servlet-name>Faces Servlet</servlet-name>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>
而上面的代码是写在Backing Bean类的方法中的
并调用
<tr>
<td align="center"><a4j:commandButton
value="Print" styleClass="button"
action="#{declarationBB.convertToPdf}"></a4j:commandButton></td>
</tr>
我在新页面下面
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