Java/Servlets/Send File
Содержание
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>