📄 docfileservlet.java

📁 openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.
💻 JAVA
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// **********************************************************************// <copyright>//  BBN Technologies//  10 Moulton Street//  Cambridge, MA 02138//  (617) 873-8000// //  Copyright (C) BBNT Solutions LLC. All rights reserved.// </copyright>// **********************************************************************// $Source: /cvs/distapps/openmap/src/vpfservlet/WEB-INF/src/com/bbn/openmap/vpfservlet/DocFileServlet.java,v $// $Revision: 1.2.2.2 $ $Date: 2005/08/11 21:03:07 $ $Author: dietrick $// **********************************************************************package com.bbn.openmap.vpfservlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import javax.servlet.RequestDispatcher;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.bbn.openmap.io.FormatException;import com.bbn.openmap.layer.vpf.DcwRecordFile;/** * This class handles displaying VPF .doc files */public class DocFileServlet extends VPFHttpServlet {    /** the columns we need from a VPF doc file */    static final String FieldColumns[] = { "text" };    /** the fields in a VPF doc file we need */    static final char[] FieldTypeSchema = { 'T' };    /** the field lengths in a VPF doc file we need */    static final int[] FieldLengthSchema = { -1 };    /**     * A do-nothing constructor - init does all the work.     */    public DocFileServlet() {        super();    }    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        String filePath = (String) request.getAttribute(DispatchServlet.ROOTPATH_FILENAME);        if (filePath == null) {            String pathInfo = setPathInfo(request);            filePath = contextInfo.resolvePath(pathInfo);            if (!pathOkay(filePath, pathInfo, response)) {                return;            }        }        DcwRecordFile docfile = null;        try {            docfile = new DcwRecordFile(filePath);        } catch (FormatException fe) {            response.sendError(HttpServletResponse.SC_NOT_FOUND,                    " docfile not found");            return;        }        response.setContentType("text/html");        PrintWriter out = response.getWriter();        out.println(HTML_DOCTYPE);        out.println(getStylesheetHTML(request));        String tableName = docfile.getTableName();        out.println("<HTML>");        String title = "VPF Documentation File " + tableName;        out.println("<HEAD><TITLE>" + title + "</TITLE></HEAD>");        out.println("<BODY><H1>" + title + "</H1>");        try {            docfile.lookupSchema(FieldColumns,                    true,                    FieldTypeSchema,                    FieldLengthSchema,                    false);        } catch (FormatException fe) {            out.println("The documentation file appears to be invalid.");            RequestDispatcher rd = request.getRequestDispatcher("/Schema");            rd.include(request, response);            out.println("</BODY></HTML>");            docfile.close();            return;        }        ArrayList al = new ArrayList(FieldTypeSchema.length);        out.println("<pre>");        try {            while (docfile.parseRow(al)) {                out.println("   " + al.get(1).toString());            }            out.println("</pre>");        } catch (FormatException fe) {            out.println("/pre>");            out.println("File Format Exception processing data: " + fe);        }        out.println("</BODY></HTML>");        docfile.close();    }}
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