Use of struts menu (Dynamic Data)

The following figure shows how to use Struts-menu in my actual project.
1.
Copy necessary jar library files to dbmenu \ WEB-INF \ Lib
Log4j- 1.2.8 . Jar
Struts-menu-2.3.jar
Copy the menu-config.xml to the struts-menu.tld directory,
And some necessary images and jscripts, CSS to the corresponding directory
Images /*.*
Scripts/menuexpandable. js xtree. js
Styles/menuexpandable.css global.css xtree.css
2.
Modify the struts-config.xml file, add the following section

<Plug-in classname = "net. SF. Navigator. Menu. menuplugin">
<Set-Property = "menuconfig"
Value = "/WEB-INF/menu-config.xml"/>
</Plug-in>

3. Obtain the data and construct a tree menu:
Whatever method is used to obtain data (JDBC, Hibernate ...),
The tree menu we want to construct requires two required elements: 1. name displayed 2. Connected location)
Treebuilder. Java
========================================================== ========================================================== ========================

/*
* Creation date:
*/
Import ....

Import net. SF. Navigator. Menu. menucomponent;
Import net. SF. Navigator. Menu. menurepository;

/**
* @ Author yutengfei
*/
Public class treebuilder {
Protected final static log = logfactory. getlog ("treebuilder ");
Public treebuilder (){}

// The following code generates a tree structure and stores it in the session with the name "treerepository ".
Public static void initialtree (httpservletrequest request, httpservlet servlet ){
Try {
Menurepository repository = new menurepository ();
Servletcontext context = servlet. getservletcontext ()
// Get the Repository from the application scope-and copy
// Displayermappings from it.
Menurepository defaultrepository = (menurepository) Context. getattribute (menurepository. menu_repository_key );

Repository. setdisplayers (defaultrepository. getdisplayers ());

// Your code begin
List tree = gettreedatafromdatabase ();//
// Generate a list of data obtained from the database (A Tree node is a notebean object). The method for obtaining data is not provided here
For (iterator it = tree. iterator (); it. hasnext ();)
{
Menucomponent MC = new menucomponent (); // create a menu object (tree node) and set its attributes
Notebean ROW = (notebean) it. Next ()
String name = (string) Row. getname ();
MC. setname (name); // set the name of the displayed Node
String parent = (string) Row. getparentname ();
System. Out. println (name + ", parent is:" + parent );
If (parent! = NULL) {// a "parent" Node exists
Menucomponent parentmenu = repository. getmenu (parent );
If (parentmenu = NULL ){
System. Out. println ("parentmenu '" + parent + "'doesn' t exist! ");
// Create a temporary parentmenu
Parentmenu = new menucomponent ();
Parentmenu. setname (parent );
Repository. addmenu (parentmenu );
}

MC. setparent (parentmenu); // you can specify the parent node.
}
String title = (string) Row. gettitle ();
MC. settitle (title );
String location = (string) Row. getlocation ();
MC. setlocation (location );
Repository. addmenu (MC );
}
Request. getsession (). setattribute ("treerepository", repository); // the entire tree structure is stored in the session.
} Catch (exception ex ){
Ex. printstacktrace ();
}

}

}

4. Foreground JSP display tree menu

<% Try {%>
<%
If (session. getattribute ("treerepository") = NULL ){
Treebuilder. initialtree (request, (httpservlet) pagecontext. getpage ());
} %>
<% List = new arraylist ();
Menurepository repository = (menurepository) Session. getattribute ("treerepository ");
List = repository. gettopmenus ();
String name = ""; %>
<Div class = "dynamicmenu"> <menu: usemenudisplayer name = "listmenu" repository = "treerepository">
<% For (iterator it = List. iterator (); it. hasnext ();){
Name = (menucomponent) it. Next (). getname (); %>
<Menu: displaymenu name = "<% = Name %>"/>
<% }%>
</Menu: usemenudisplayer> </div>
<%} Catch (exception e ){
E. printstacktrace ();
}
%>

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