quoteviewerapp.java

java 写的一个新闻发布系统

package components.quoteviewer;

import java.io.*;						// IOException
import java.util.*;                     // Hashtable
import javax.servlet.*;                 // ServletConfig
import javax.servlet.http.*;            // HttpServletRequest, HttpServletResponse

import org.jahia.params.*;          // ParamBean
import org.jahia.utils.*;           // FileUtils
import org.jahia.services.applications.*; // JahiaApplication
import org.jahia.exceptions.*;      // JahiaException


public class QuoteViewerApp extends HttpServlet {


    private String version = "1.2";

    private static final String TEMPLATE_PATH   = "\\quoteviewer" + File.separator + "templates" + File.separator;
    private static final String TEMPLATE_FILE   = "std.html";

    /***
        * doGet
        * EV    10.12.2000
        *
        */
    public void doGet( HttpServletRequest request, HttpServletResponse response ) throws IOException
	{
	    PrintWriter out = response.getWriter();
	    //System.out.println( "Quote View App ver" + version + " responding to " + request.getRemoteAddr() + " GET METHOD " );
	    //System.out.println( "Current application user : " + request.getRemoteUser());
	    out.println( drawForm( request, response, "" ) );
	} // end doGet



    /***
        * doPost
        * EV    10.12.2000
        *
        */
    public void doPost( HttpServletRequest request, HttpServletResponse response ) throws IOException
	{
	    //System.out.println( "Quote View App ver" + version + " responding to " + request.getRemoteAddr() + " POST METHOD " );
	    PrintWriter out = response.getWriter();
	    String theQuote = request.getParameter( "quote" );
	    String windowParams = "width=800,height=600,scrollbars=1,status=1,resizable=1";
	    String html = "<script language=\"javascript\">\n";
	    html += "window.open( 'http://finance.yahoo.com/q?s=" + theQuote + "&d=v1', 'quote', '" + windowParams + "' );";
	    html += "</script>";
	    html += drawForm( request, response, theQuote );
	    out.println(html);
	} // end doPost



    /***
        * drawForm
        * EV    10.12.2000
        *
        */
    public String drawForm( HttpServletRequest request, 
    			    HttpServletResponse response,
    			    String defaultQuote )
    {
            String html = "";
            ParamBean jParams = (ParamBean) request.getAttribute( "org.jahia.params" );
	        if (jParams == null) 
	            return "This application is designed to be run with Jahia";
        
            String quoteField = "<input type=\"text\" name=\"quote\" maxlength=\"5\" size=\"5\" value=\"" + defaultQuote + "\"><br>\n";
            String submitField = "<input type=\"submit\" value=\"View Quote\"><br>\n";
            String filePath = jParams.settings().getComponentsDiskPath() + TEMPLATE_PATH + TEMPLATE_FILE;

            Hashtable tokens = new Hashtable();
            tokens.put( "quoteField", quoteField );
            tokens.put( "submitField", submitField );

            String actionURL;
            if (request.getContextPath().equals("/")) {
            	actionURL = request.getServletPath();
            } else {
        	actionURL = request.getContextPath() + request.getServletPath();
            }
            html = "<form method=\"POST\" action=\"" + response.encodeURL(actionURL) + "\">\n";
            html += composeSource(  filePath, tokens );
            html += "</form>\n";	    

	    return html;
    } // end drawForm



    /***
        * composeSource
        * EV    10.12.2000
        *
        */
    public String composeSource( String filePath, Hashtable tokens )
    {
        String contents = "";
        try {
            contents = FileUtils.getInstance().readFile( filePath );
        } catch (Exception e) {
            //System.out.println( "QuoteViewerApp > Error occured : " + e );
            contents = "- Error in reading file - ";
            return contents;
        }

        int pos = 0;
        String theKey = "";
        Enumeration keys = tokens.keys();
        while (keys.hasMoreElements()) {
            theKey = (String) keys.nextElement();
            pos = contents.indexOf( "<!--" + theKey + "-->" );
            if (pos > -1) {
                contents = contents.substring( 0, pos ) 
                            + tokens.get(theKey) 
                            + contents.substring( pos, contents.length() );
            }
        }

        return contents;
    } // end composeSource



} // end QuoteViewerApp