Java struts2 xml

Question

hi mates,
Plese give me some clues for some of my questions.
I stored xml file data as xmlType in oracle database.
I am also using struts 2 for the project.
I wanna retrieve that whole xml file in the form of string and send them to the client html table. How can I catch that whole string xml file from client side with or without using the strut 2 features, objects are on the memory.
Second question is , how could I send the xml file data in string format back to server? I do appreciate for ur help. cheers.

Answer 1

use a simple servlet to send xml data.
example 1
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);
example 2
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);
}Hope That Helps