📄 categoriesrecord.jsp
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<%@ page contentType="text/html;charset=gb2312"%>
<%@ include file="Common.jsp" %><%!
//
// Filename: CategoriesRecord.jsp
static final String sFileName = "CategoriesRecord.jsp";
%><%
String cSec = checkSecurity(2, session, response, request);
if ("sendRedirect".equals(cSec) ) return;
boolean bDebug = false;
String sAction = getParam( request, "FormAction");
String sForm = getParam( request, "FormName");
String sCategoriesErr = "";
java.sql.Connection conn = null;
java.sql.Statement stat = null;
String sErr = loadDriver();
conn = cn();
stat = conn.createStatement();
if ( ! sErr.equals("") ) {
try {
out.println(sErr);
}
catch (Exception e) {}
}
if ( sForm.equals("Categories") ) {
sCategoriesErr = CategoriesAction(request, response, session, out, sAction, sForm, conn, stat);
if ( "sendRedirect".equals(sCategoriesErr)) return;
}
%>
<html>
<head>
<title>Book Store</title>
<meta http-equiv="pragma" content="no-cache"/>
<meta http-equiv="expires" content="0"/>
<meta http-equiv="cache-control" content="no-cache"/>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body style="background-color: #FFFFFF; color: #000000; font-family: Arial, Tahoma, Verdana, Helveticabackground-color: #FFFFFF; color: #000000; font-family: Arial, Tahoma, Verdana, Helvetica">
<jsp:include page="Header.jsp" flush="true"/>
<table>
<tr>
<td valign="top">
<% Categories_Show(request, response, session, out, sCategoriesErr, sForm, sAction, conn, stat); %>
</td>
</tr>
</table>
<jsp:include page="Footer.jsp" flush="true"/>
</body>
</html>
<%%>
<%
if ( stat != null ) stat.close();
if ( conn != null ) conn.close();
%>
<%!
String CategoriesAction(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.http.HttpSession session, javax.servlet.jsp.JspWriter out, String sAction, String sForm, java.sql.Connection conn, java.sql.Statement stat) throws java.io.IOException {
String sCategoriesErr ="";
try {
if (sAction.equals("")) return "";
String sSQL="";
String transitParams = "";
String primaryKeyParams = "";
String sQueryString = "";
String sPage = "";
String sParams = "";
String sActionFileName = "CategoriesGrid.jsp";
String sWhere = " ";
boolean bErr = false;
long iCount = 0;
String pPKcategory_id = "";
if (sAction.equalsIgnoreCase("cancel") ) {
try {
if ( stat != null ) stat.close();
if ( conn != null ) conn.close();
}
catch ( java.sql.SQLException ignore ) {}
response.sendRedirect (sActionFileName);
return "sendRedirect";
}
final int iinsertAction = 1;
final int iupdateAction = 2;
final int ideleteAction = 3;
int iAction = 0;
if ( sAction.equalsIgnoreCase("insert") ) { iAction = iinsertAction; }
if ( sAction.equalsIgnoreCase("update") ) { iAction = iupdateAction; }
if ( sAction.equalsIgnoreCase("delete") ) { iAction = ideleteAction; }
// Create WHERE statement
if ( iAction == iupdateAction || iAction == ideleteAction ) {
pPKcategory_id = getParam( request, "PK_category_id");
if ( isEmpty(pPKcategory_id)) return sCategoriesErr;
sWhere = "category_id=" + toSQL(pPKcategory_id, adNumber);
}
String fldname="";
String fldcategory_id="";
// Load all form fields into variables
fldname = getParam(request, "name");
// Validate fields
if ( iAction == iinsertAction || iAction == iupdateAction ) {
if ( isEmpty(fldname) ) {
sCategoriesErr = sCategoriesErr + "The value in field Name is required.<br>";
}
if (sCategoriesErr.length() > 0 ) {
return (sCategoriesErr);
}
}
sSQL = "";
// Create SQL statement
switch (iAction) {
case iinsertAction :
sSQL = "insert into categories (" +
"name)" +
" values (" +
toSQL(fldname, adText) + ")";
break;
case iupdateAction:
sSQL = "update categories set " +
"name=" + toSQL(fldname, adText);
sSQL = sSQL + " where " + sWhere;
break;
case ideleteAction:
sSQL = "delete from categories where " + sWhere;
break;
}
if ( sCategoriesErr.length() > 0 ) return sCategoriesErr;
try {
// Execute SQL statement
stat.executeUpdate(sSQL);
}
catch(java.sql.SQLException e) {
sCategoriesErr = e.toString(); return (sCategoriesErr);
}
try {
if ( stat != null ) stat.close();
if ( conn != null ) conn.close();
}
catch ( java.sql.SQLException ignore ) {}
response.sendRedirect (sActionFileName);
return "sendRedirect";
}
catch (Exception e) {out.println(e.toString()); }
return (sCategoriesErr);
}
void Categories_Show(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.http.HttpSession session, javax.servlet.jsp.JspWriter out, String sCategoriesErr, 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 pcategory_id = "";
String fldcategory_id="";
String fldname="";
boolean bPK = true;
if ( "".equals(sCategoriesErr)) {
// Load primary key and form parameters
fldcategory_id = getParam( request, "category_id");
pcategory_id = getParam( request, "category_id");
}
else {
// Load primary key, form parameters and form fields
fldcategory_id = getParam( request, "category_id");
fldname = getParam( request, "name");
pcategory_id = getParam( request, "PK_category_id");
}
if ( isEmpty(pcategory_id)) { bPK = false; }
sWhere += "category_id=" + toSQL(pcategory_id, adNumber);
primaryKeyParams += "<input type=\"hidden\" name=\"PK_category_id\" value=\""+pcategory_id+"\"/>";
sSQL = "select * from categories 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\">图书分类</font></td>\n </tr>");
if ( ! sCategoriesErr.equals("")) {
out.println(" <tr>\n <td style=\"background-color: #FFFFFF; border-width: 1\" colspan=\"2\"><font style=\"font-size: 10pt; color: #000000\">"+sCategoriesErr+"</font></td>\n </tr>");
}
sCategoriesErr="";
out.println(" <form method=\"get\" action=\""+sFileName+"\" name=\"Categories\">");
java.sql.ResultSet rs = null;
if ( bPK && ! (sAction.equals("insert") && "Categories".equals(sForm))) {
// Open recordset
rs = openrs( stat, sSQL);
rs.next();
String[] aFields = getFieldsName( rs );
getRecordToHash( rs, rsHash, aFields );
rs.close();
fldcategory_id = (String) rsHash.get("category_id");
if ( "".equals(sCategoriesErr)) {
// Load data from recordset when form displayed first time
fldname = (String) rsHash.get("name");
}
if (sAction.equals("") || ! "Categories".equals(sForm)) {
fldcategory_id = (String) rsHash.get("category_id");
fldname = (String) rsHash.get("name");
}
}
else {
if ( "".equals(sCategoriesErr)) {
fldcategory_id = toHTML(getParam(request,"category_id"));
}
}
// 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\">分类名称</font></td><td style=\"background-color: #FFFFFF; border-width: 1\">"); out.print("<input type=\"text\" name=\"name\" maxlength=\"50\" value=\""+toHTML(fldname)+"\" size=\"50\">");
out.println("</td>\n </tr>");
out.print(" <tr>\n <td colspan=\"2\" align=\"right\">");
if ( bPK && ! (sAction.equals("insert") && "Categories".equals(sForm))) {
out.print("<input type=\"submit\" value=\"Update\" onclick=\"document.Categories.FormAction.value = 'update';\">");out.print("<input type=\"submit\" value=\"Delete\" onclick=\"document.Categories.FormAction.value = 'delete';\">");out.print("<input type=\"submit\" value=\"Cancel\" onclick=\"document.Categories.FormAction.value = 'cancel';\">");
out.print("<input type=\"hidden\" name=\"FormName\" value=\"Categories\"><input type=\"hidden\" value=\"update\" name=\"FormAction\">");
}
else {
out.print("<input type=\"submit\" value=\"Insert\" onclick=\"document.Categories.FormAction.value = 'insert';\">");out.print("<input type=\"submit\" value=\"Cancel\" onclick=\"document.Categories.FormAction.value = 'cancel';\">");
out.print("<input type=\"hidden\" name=\"FormName\" value=\"Categories\"><input type=\"hidden\" value=\"insert\" name=\"FormAction\">");
}out.print("<input type=\"hidden\" name=\"category_id\" value=\""+toHTML(fldcategory_id)+"\">");
out.print(transitParamsHidden+requiredParams+primaryKeyParams);
out.println("</td>\n </tr>\n </form>\n </table>");
}
catch (Exception e) { out.println(e.toString()); }
} %>⌨️ 快捷键说明
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