Admin: 1 версия

2010-06-01T05:21:34Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

Новая страница

== Pdf and servlet ==



<source lang="java">
import java.io.IOException;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Paragraph;
import com.lowagie.text.html.HtmlWriter;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.rtf.RtfWriter2;

public class HelloWorldServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
String presentationtype = request.getParameter("presentationtype");
Document document = new Document();
try {
if ("pdf".equals(presentationtype)) {
response.setContentType("application/pdf");
PdfWriter.getInstance(document, response.getOutputStream());
} else if ("html".equals(presentationtype)) {
response.setContentType("text/html");
HtmlWriter.getInstance(document, response.getOutputStream());
} else if ("rtf".equals(presentationtype)) {
response.setContentType("text/rtf");
RtfWriter2.getInstance(document, response.getOutputStream());
}
document.open();
document.add(new Paragraph("Hello World"));
document.add(new Paragraph(new Date().toString()));
} catch (DocumentException de) {
de.printStackTrace();
System.err.println("document: " + de.getMessage());
}
document.close();
}
}</source>



== Set ContentType and transfer Pdf document to client ==



<source lang="java">
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
public class OutSimplePdf extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
makePdf(request, response, "GET");
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
makePdf(request, response, "POST");
}
public void makePdf(HttpServletRequest request,
HttpServletResponse response, String methodGetPost)
throws ServletException, IOException {
try {
String msg = "your message";
Document document = new Document();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfWriter.getInstance(document, baos);
document.open();
document.add(new Paragraph(msg));
document.add(Chunk.NEWLINE);
document.add(new Paragraph("a paragraph"));
document.close();
response.setHeader("Expires", "0");
response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0");
response.setHeader("Pragma", "public");
response.setContentType("application/pdf");
response.setContentLength(baos.size());
ServletOutputStream out = response.getOutputStream();
baos.writeTo(out);
out.flush();
} catch (Exception e2) {
System.out.println("Error in " + getClass().getName() + "\n" + e2);
}
}
public void destroy() {
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010