bookmaint.jsp

Eclipse编程技术与实例一书的附CD-ROM光盘

          
        break;
  
      }

      if ( sBookErr.length() > 0 ) return sBookErr;
      try {
        // Execute SQL statement
        stat.executeUpdate(sSQL);
      }
      catch(java.sql.SQLException e) {
        sBookErr = e.toString(); return (sBookErr);
      }
  
      try {
        if ( stat != null ) stat.close();
        if ( conn != null ) conn.close();
      }
      catch ( java.sql.SQLException ignore ) {}
      response.sendRedirect (sActionFileName + sParams);

      return "sendRedirect";
    }
    catch (Exception e) {out.println(e.toString()); }
    return (sBookErr);
  }

  


  void Book_Show(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.http.HttpSession session, javax.servlet.jsp.JspWriter out, String sBookErr, String sForm, String sAction, java.sql.Connection conn, java.sql.Statement stat) throws java.io.IOException {
    try {

      String sSQL="";
      String sQueryString = "";
      String sPage = "";
      String sWhere = "";
      String transitParams = "";
      String transitParamsHidden = "";
      String requiredParams = "";
      String primaryKeyParams ="";
      java.util.Hashtable rsHash = new java.util.Hashtable();
      
      String pitem_id = "";

      String fldcategory_id="";
      String flditem_id="";
      String fldname="";
      String fldauthor="";
      String fldprice="";
      String fldproduct_url="";
      String fldimage_url="";
      String fldnotes="";
      String fldis_recommended="";


      boolean bPK = true;

      if ( "".equals(sBookErr)) {
        // Load primary key and form parameters
        fldcategory_id = getParam( request, "category_id");
        flditem_id = getParam( request, "item_id");
        transitParamsHidden += "<input type=\"hidden\" name=\"Trn_category_id\" value=\""+getParam( request, "category_id")+"\">";
        transitParams += "Trn_category_id="+getParam( request, "category_id")+"&";
        pitem_id = getParam( request, "item_id");
      }
      else {
        // Load primary key, form parameters and form fields
        flditem_id = getParam( request, "item_id");
        fldname = getParam( request, "name");
        fldauthor = getParam( request, "author");
        fldcategory_id = getParam( request, "category_id");
        fldprice = getParam( request, "price");
        fldproduct_url = getParam( request, "product_url");
        fldimage_url = getParam( request, "image_url");
        fldnotes = getParam( request, "notes");
        fldis_recommended = getParam( request, "is_recommended");
        transitParamsHidden += "<input type=\"hidden\" name=\"Trn_category_id\" value=\""+getParam( request, "Trn_category_id")+"\">";
        transitParams += "Trn_category_id="+getParam( request, "Trn_category_id")+"&";
        
        pitem_id = getParam( request, "PK_item_id");
      }

      
      if ( isEmpty(pitem_id)) { bPK = false; }
      
      sWhere += "item_id=" + toSQL(pitem_id, adNumber);
      primaryKeyParams += "<input type=\"hidden\" name=\"PK_item_id\" value=\""+pitem_id+"\"/>";

      sSQL = "select * from items where " + sWhere;


      out.println("    <table style=\"\">");
      out.println("     <tr>\n      <td style=\"background-color: #336699; text-align: Center; border-style: outset; border-width: 1\" colspan=\"2\"><font style=\"font-size: 12pt; color: #FFFFFF; font-weight: bold\">书籍</font></td>\n     </tr>");
      if ( ! sBookErr.equals("")) {
        out.println("     <tr>\n      <td style=\"background-color: #FFFFFF; border-width: 1\" colspan=\"2\"><font style=\"font-size: 10pt; color: #000000\">"+sBookErr+"</font></td>\n     </tr>");
      }
      sBookErr="";
      out.println("     <form method=\"get\" action=\""+sFileName+"\" name=\"Book\">");

      java.sql.ResultSet rs = null;

      if ( bPK &&  ! (sAction.equals("insert") && "Book".equals(sForm))) {

        // Open recordset
        rs = openrs( stat, sSQL);
        rs.next();
        String[] aFields = getFieldsName( rs );
        getRecordToHash( rs, rsHash, aFields );
        rs.close();
        flditem_id = (String) rsHash.get("item_id");
        if ( "".equals(sBookErr)) {
          // Load data from recordset when form displayed first time
          fldname = (String) rsHash.get("name");
          fldauthor = (String) rsHash.get("author");
          fldcategory_id = (String) rsHash.get("category_id");
          fldprice = (String) rsHash.get("price");
          fldproduct_url = (String) rsHash.get("product_url");
          fldimage_url = (String) rsHash.get("image_url");
          fldnotes = (String) rsHash.get("notes");
          fldis_recommended = (String) rsHash.get("is_recommended");
        }

        if (sAction.equals("") || ! "Book".equals(sForm)) {
      
          flditem_id = (String) rsHash.get("item_id");
          fldname = (String) rsHash.get("name");
          fldauthor = (String) rsHash.get("author");
          fldcategory_id = (String) rsHash.get("category_id");
          fldprice = (String) rsHash.get("price");
          fldproduct_url = (String) rsHash.get("product_url");
          fldimage_url = (String) rsHash.get("image_url");
          fldnotes = (String) rsHash.get("notes");
          fldis_recommended = (String) rsHash.get("is_recommended");
        }
        
      }
      else {
        if ( "".equals(sBookErr)) {
          flditem_id = toHTML(getParam(request,"item_id"));
          fldcategory_id = toHTML(getParam(request,"category_id"));
          fldis_recommended= "0";
        }
      }
      


      // Show form field
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">书名</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\"  name=\"name\" maxlength=\"100\" value=\""+toHTML(fldname)+"\" size=\"30\">");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">作者</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\"  name=\"author\" maxlength=\"100\" value=\""+toHTML(fldauthor)+"\" size=\"30\">");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">类别</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); 
      out.print("<select name=\"category_id\">"+getOptions( conn, "select category_id, name from categories order by 2",false,true,fldcategory_id)+"</select>");
      
      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">价格</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\"  name=\"price\" maxlength=\"10\" value=\""+toHTML(fldprice)+"\" size=\"10\">");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">产品链接</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\"  name=\"product_url\" maxlength=\"100\" value=\""+toHTML(fldproduct_url)+"\" size=\"40\">");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">Image URL</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\"  name=\"image_url\" maxlength=\"100\" value=\""+toHTML(fldimage_url)+"\" size=\"40\">");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">备注</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<textarea name=\"notes\" cols=\"60\" rows=\"8\">"+toHTML(fldnotes)+"</textarea>");

      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td style=\"background-color: #FFEAC5; border-style: inset; border-width: 0\"><font style=\"font-size: 10pt; color: #000000\">推荐</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); 
      if ( fldis_recommended.equalsIgnoreCase("1") ) {
        out.print("<input checked type=\"checkbox\" name=\"is_recommended\" value=\"1\">");
      }
      else {
        out.print("<input type=\"checkbox\" name=\"is_recommended\" value=\"1\">");
      }
      
      out.println("</td>\n     </tr>");
      
      out.print("     <tr>\n      <td colspan=\"2\" align=\"right\">");
      

      if ( bPK && ! (sAction.equals("insert") && "Book".equals(sForm))) {
        out.print("<input type=\"submit\" value=\"修改\" onclick=\"document.Book.FormAction.value = 'update';\">");out.print("<input type=\"submit\" value=\"删除\" onclick=\"document.Book.FormAction.value = 'delete';\">");out.print("<input type=\"submit\" value=\"取消\" onclick=\"document.Book.FormAction.value = 'cancel';\">");
        out.print("<input type=\"hidden\" name=\"FormName\" value=\"书籍\"><input type=\"hidden\" value=\"update\" name=\"FormAction\">");
      }
      
      else {
        out.print("<input type=\"submit\" value=\"添加\" onclick=\"document.Book.FormAction.value = 'insert';\">");out.print("<input type=\"submit\" value=\"取消\" onclick=\"document.Book.FormAction.value = 'cancel';\">");
        out.print("<input type=\"hidden\" name=\"FormName\" value=\"书籍\"><input type=\"hidden\" value=\"insert\" name=\"FormAction\">");
      }out.print("<input type=\"hidden\" name=\"item_id\" value=\""+toHTML(flditem_id)+"\">");
      out.print(transitParamsHidden+requiredParams+primaryKeyParams);
      out.println("</td>\n     </tr>\n     </form>\n    </table>");
      



    }
    catch (Exception e) { out.println(e.toString()); }
  } %>