Admin: 1 версия

2010-06-01T06:11:26Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:43Z

Новая страница

== Another servlet to Send PDF ==



<source lang="java">
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SendPdf extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get the "file" parameter
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in SendPdf servlet.");
// add the .pdf suffix if it doesn"t already exist
if (fileName.indexOf(".pdf") == -1)
fileName = fileName + ".pdf";
String pdfDir = getServletContext().getInitParameter("pdf-dir");
if (pdfDir == null || pdfDir.equals(""))
throw new ServletException(
"Invalid or non-existent "pdf-Dir" context-param.");
ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {
stream = response.getOutputStream();
File pdf = new File(pdfDir + "/" + fileName);
response.setContentType("application/pdf");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);
response.setContentLength((int) pdf.length());
FileInputStream input = new FileInputStream(pdf);
buf = new BufferedInputStream(input);
int readBytes = 0;
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>



== Another servlet to Send XML ==



<source lang="java">

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SendXml extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get the "file" parameter
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in SendXml servlet.");
// add the .doc suffix if it doesn"t already exist
if (fileName.indexOf(".xml") == -1)
fileName = fileName + ".xml";
String xmlDir = getServletContext().getInitParameter("xml-dir");
if (xmlDir == null || xmlDir.equals(""))
throw new ServletException(
"Invalid or non-existent xmlDir context-param.");
ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {
stream = response.getOutputStream();
File xml = new File(xmlDir + "/" + fileName);
response.setContentType("text/xml");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);
response.setContentLength((int) xml.length());
FileInputStream input = new FileInputStream(xml);
buf = new BufferedInputStream(input);
int readBytes = 0;
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>



== Send mp3 ==



<source lang="java">

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SendMp3 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in SendMp3 servlet.");
if (fileName.indexOf(".mp3") == -1)
fileName = fileName + ".mp3";
String mp3Dir = getServletContext().getInitParameter("mp3-dir");
if (mp3Dir == null || mp3Dir.equals(""))
throw new ServletException(
"Invalid or non-existent mp3Dir context-param.");
ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {
stream = response.getOutputStream();
File mp3 = new File(mp3Dir + "/" + fileName);
//set response headers
response.setContentType("audio/mpeg");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);
response.setContentLength((int) mp3.length());
FileInputStream input = new FileInputStream(mp3);
buf = new BufferedInputStream(input);
int readBytes = 0;
//read from the file; write to the ServletOutputStream
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>



== Send PDF file ==



<source lang="java">
import java.io.BufferedInputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class UrlServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get the "file" parameter
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in UrlServlet servlet.");
if (fileName.indexOf(".pdf") == -1)
fileName = fileName + ".pdf";
URL pdfDir = null;
URLConnection urlConn = null;
ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {
pdfDir = new URL(getServletContext().getInitParameter(
"remote-pdf-dir")
+ fileName);
} catch (MalformedURLException mue) {
throw new ServletException(mue.getMessage());
}
try {
stream = response.getOutputStream();
//set response headers
response.setContentType("application/pdf");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);
urlConn = pdfDir.openConnection();
response.setContentLength((int) urlConn.getContentLength());
buf = new BufferedInputStream(urlConn.getInputStream());
int readBytes = 0;
//read from the file; write to the ServletOutputStream
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>



== Send word document ==



<source lang="java">
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class SendWord extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get the "file" parameter
String fileName = (String) request.getParameter("file");
if (fileName == null || fileName.equals(""))
throw new ServletException(
"Invalid or non-existent file parameter in SendWord servlet.");
// add the .doc suffix if it doesn"t already exist
if (fileName.indexOf(".doc") == -1)
fileName = fileName + ".doc";
String wordDir = getServletContext().getInitParameter("word-dir");
if (wordDir == null || wordDir.equals(""))
throw new ServletException(
"Invalid or non-existent wordDir context-param.");
ServletOutputStream stream = null;
BufferedInputStream buf = null;
try {
stream = response.getOutputStream();
File doc = new File(wordDir + "/" + fileName);
response.setContentType("application/msword");
response.addHeader("Content-Disposition", "attachment; filename="
+ fileName);
response.setContentLength((int) doc.length());
FileInputStream input = new FileInputStream(doc);
buf = new BufferedInputStream(input);
int readBytes = 0;
while ((readBytes = buf.read()) != -1)
stream.write(readBytes);
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (stream != null)
stream.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>



== Send XML ==



<source lang="java">
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ResourceServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get web.xml for display by a servlet
String file = "/WEB-INF/web.xml";
URL url = null;
URLConnection urlConn = null;
PrintWriter out = null;
BufferedInputStream buf = null;
try {
out = response.getWriter();
url = getServletContext().getResource(file);
//set response header
response.setContentType("text/xml");
urlConn = url.openConnection();
//establish connection with URL presenting web.xml
urlConn.connect();
buf = new BufferedInputStream(urlConn.getInputStream());
int readBytes = 0;
while ((readBytes = buf.read()) != -1)
out.write(readBytes);
} catch (MalformedURLException mue) {
throw new ServletException(mue.getMessage());
} catch (IOException ioe) {
throw new ServletException(ioe.getMessage());
} finally {
if (out != null)
out.close();
if (buf != null)
buf.close();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}

</source>

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Java/Servlets/Send File - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010