treeservlet.java

来自「这是AJAX的一个HTML实现！ HTML标签AJAX的实现！」· Java 代码 · 共 77 行

/**
 * Copyright 2005 Darren L. Spurgeon
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sourceforge.ajaxtags.demo.servlet;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.ajaxtags.helpers.TreeItem;
import net.sourceforge.ajaxtags.servlets.BaseAjaxServlet;
import net.sourceforge.ajaxtags.xml.AjaxTreeXmlBuilder;

/**
 * An example servlet that responds to an ajax:tree tag action.
 * 
 * @author Musachy Barroso
 * @version $Revision: 28 $ $Date$
 */
public class TreeServlet extends BaseAjaxServlet {

    /**
     * @see BaseAjaxServlet#getXmlContent(javax.servlet.http.HttpServletRequest,
     *      javax.servlet.http.HttpServletResponse)
     */
    public String getXmlContent(HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	String action = request.getParameter("action");
	String node = request.getParameter("node");
	if ((action != null) && action.equalsIgnoreCase("info")) {
	    return "<b>" + node + "</b> at " + new Date(); // nur den namen
							   // liefern
	}

	AjaxTreeXmlBuilder treeBuilder = new AjaxTreeXmlBuilder();
	if (node.equals("cars")) {
	    treeBuilder.addItem("American", "American", true, "#");
	    treeBuilder.addItem("Japanese", "Japanese", false, "#");
	}

	else if (node.equals("American")) {
	    treeBuilder.addItem("Ford", "Ford", true, "#");
	} else if (node.equals("Ford")) {
	    TreeItem item = new TreeItem("Mustang", "Mustang", false);
	    item.setLeaf(true);
	    treeBuilder.add(item);
	    item = new TreeItem("FordGT", "FordGT", false);
	    item.setLeaf(true);
	    treeBuilder.add(item);
	} else if (node.equals("Ford")) {
	    treeBuilder.addItem("Mustang", "Mustang", false, "#");
	    treeBuilder.addItem("FordGT", "FordGT", false, "#");
	} else if (node.equals("Japanese")) {
	    treeBuilder.addItem("Honda", "Honda", true, "#");
	} else if (node.equals("Honda")) {
	    treeBuilder.addItem("Civic", "Civic", true, "#");
	    treeBuilder.addItem("Accord", "Accord", true, "#");
	}

	return treeBuilder.toString();
    }

}