📄 htmlportal.java

📁 JAVA Servlet2.3外文书籍源码
💻 JAVA
字号:
package personalPortal;/** * Title:        Professional Java Servlet Programming - Chapter 2 * Description:  HTML support class for PortalServlet * Copyright:    Copyright (c) 2001 * Company: * @author Andrew Harbourne-Thomas * @version 1.0 */public class HTMLPortal implements DataMapping {  /** Variable to build the web page opening HTML */  private StringBuffer openPage;  /** Variable to build the web page closing HTML */  private StringBuffer closePage;  /** Stores the parameter indicating the page requested */  private String pageRequested;  /** Stores the parameter indicating if the client wants   *  the normal view or print view   */  private String pageViewType;  /**   * Constructor builds the page ready for use.  It calls the methods   * to prepare the various parts of the page.   *   * @param pageRequested - the specific page requested   * @param pageViewType - type of view (print or normal) requested   */  public HTMLPortal(String pageRequested, String pageViewType) {    this.pageRequested = pageRequested;    this.pageViewType = pageViewType;    //check if we are constructing a normal or print page    if (PORTAL_VIEW_PARAM.equalsIgnoreCase(pageViewType)) {      prepareOpenPage();    }    else {      preparePrintOpenPage();    }    //prepare the closing part of the page    prepareClosePage();  }  /**   * @return returns the HTML to open the page (title, menu)   */  public StringBuffer getOpenPage() {    return openPage;  }  /**   * @return returns the HTML to close the page   */  public StringBuffer getClosePage() {    return closePage;  }  /**   * @return used to prepare HTML for an error   */  public StringBuffer getError(String message) {    StringBuffer error = new StringBuffer();    error.append("<h2><font color=\"darkred\">");    error.append(message);    error.append("</font></h2>");    return error;  }  /**   * this method prepares the normal opening page, including title   * and menu.   */  private void prepareOpenPage() {    openPage = new StringBuffer();    openPage.append("<html><head><title>Personal Portal");    openPage.append("</title></head><body>");    openPage.append("<table width=\"100%\"><tr>");    openPage.append("<td colspan=2 align=\"center\" bgcolor=\"#ffff80\">");    openPage.append("<h1>Personal Portal</h1></td></tr><tr>");    openPage.append("<td width=\"20%\" bgcolor=\"#ffffa0\"><br>");    openPage.append("<b>Menu</b><br><br>");    openPage.append(prepareMenu(false));    openPage.append("<br><br><br><br><br><br><br><br><br>");    openPage.append("</ul></td>");    openPage.append("<td width=\"80%\" valign=\"top\" bgcolor=\"#ffffe0\">");    openPage.append("<center><i><font size=\"-1\">(");    openPage.append(preparePrintLink("Print this Page", pageRequested));    openPage.append(")</font></i></center><br>");    openPage.append("");    openPage.append("");  }  /**   * used to prepare the opening part of the print view web page   */  private void preparePrintOpenPage() {    openPage = new StringBuffer();    openPage.append("<html><head><title>Personal Portal Print Page");    openPage.append("</title></head><body>");    openPage.append("<table width=\"100%\"><tr>");    openPage.append("<td align=\"center\" bgcolor=\"#ffff80\">");    openPage.append("<h1>Personal Portal</h1></td></tr><tr>");    openPage.append("<td align=\"center\" bgcolor=\"#ffffa0\">");    openPage.append(prepareMenu(true));    openPage.append("</td></tr><tr>");    openPage.append("<td bgcolor=\"#ffffe0\">");  }  /**   * returns the HTML to close the web page   */  private void prepareClosePage() {    closePage = new StringBuffer();    closePage.append("</td></tr></table>");    closePage.append("<p align=\"right\">&copy; 2002</body></html> ");  }  /**   * This method prepares a HTML menu for either a print view   * or normal view of the web page   *   * @param printMenu - boolean to indicate if this is a menu for   *        print page or normal page   * @return the html menu   */  private StringBuffer prepareMenu(boolean printMenu) {    StringBuffer menu = new StringBuffer();    StringBuffer menuBreak = new StringBuffer();    if (printMenu) {      menuBreak.append("&nbsp;");      menu.append("<a href=\"javascript:history.go(-1)\">Back</a>");    }    else {      menuBreak.append("<br><br>");    }    //loop through the RESOURCE_DATA 2D array to prepare the    //menu    for (int i = 0; i < RESOURCE_DATA.length; i++) {      menu.append(menuBreak);      if (RESOURCE_DATA[i][NAME].equalsIgnoreCase(pageRequested)) {        menu.append(RESOURCE_DATA[i][NAME]);      }      else {        menu.append("<a href=\"");        menu.append(prepareUrl(PORTAL_VIEW_PARAM, RESOURCE_DATA[i][NAME]));        menu.append("\">");        menu.append(RESOURCE_DATA[i][NAME]);        menu.append("</a>");      }    }    return menu;  }  /**   * this method prepares the print version opening page, including title   * and menu.   */  private StringBuffer preparePrintLink(String caption, String url) {    StringBuffer link = new StringBuffer();    link.append("<a href=\"");    link.append(prepareUrl(PRINT_VIEW_PARAM, url));    link.append("\">");    link.append(caption);    link.append("</a>");    return link;  }  /**   * We use this method to prepare a URL, by appending the required   * parameters to the query string.   *   * @param printChoice - the parameter to indicate if this is a   *        link to a normal or print view version of the page   * @param viewChoice - the parameter to indicate the page   *        being linked to   */  private StringBuffer prepareUrl(String printChoice, String viewChoice) {    StringBuffer url = new StringBuffer();    url.append(PORTAL_RESOURCE);    url.append("?").append(PORTAL_VIEW_PARAM_NAME);    url.append("=").append(printChoice);    url.append("&").append(PAGE_REQUESTED_NAME);    url.append("=").append(viewChoice);    return url;  }}
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -