treetools.java

ajax实战之tree java代码

/**
 * @hibernate.class table="DQM_"
 * <p>Title: DQM</p>
 * <p>Description: </p>
 * <p>Company: norteksoft</p>
 * @author flypeng & JiangHao&YinJie
 * @version 1.0
 */
package util;

import java.util.List;

import model.People;
import model.PeopleDAO;
import model.Subtype;
import model.SubtypeDAO;
import model.Type;

/**
 * @author Administrator
 *
 */
public class TreeTools {
	public boolean typeCanExpand(int typeId){
		SubtypeDAO subdao = new SubtypeDAO();
		List list = subdao.findByTypeId(typeId);
		if(list.size()>0)return true;
		return false;
	}

	public boolean subtypeCanExpand(int subtypeId){
		PeopleDAO peopledao = new PeopleDAO();
		List list = peopledao.findBySubTypeId(subtypeId);
		if(list.size()>0)return true;
		return false;
	}
	
	/**
	 * 
	 */
	public String buildTypeTree(Type type) {
		
		StringBuffer content = new StringBuffer();
		int typeId=type.getId().intValue();
		content.append("<li id=type" + typeId + ">");//显示li元素
		if ( typeCanExpand(typeId))//如果可以展开并且初始化为隐藏,则显示展开图片，并添加showHide事件
			content.append("<img src=\"images/plus.gif\" onClick=\"showHide('"
					+ typeId + "')\">");
		else//否则显示空白图片
			content.append("<img src=\"images/blank.gif\">");
		content.append("<img src=\"images/folder.gif\"><a href=\"#\"");//添加文件夹图片
		if (typeCanExpand(typeId))
		  content.append(" onClick=\"getSubTree('"+typeId+"')\"");
			content.append(">"+type.getTypeName()+"</a>");
			content.append("</li>");
			//String typeString = content.toString();
			return content.toString();
			//out.print(typeString);
	}
	
	public String buildSubTypeTree(Subtype subType) {

		StringBuffer content = new StringBuffer();
		int typeId=subType.getId().intValue();
		content.append("<li id=subtype" + typeId + ">");//显示li元素
		if ( typeCanExpand(typeId))//如果可以展开并且初始化为隐藏,则显示展开图片，并添加showHide事件
			content.append("<img src=images/plus.gif onClick=\"showHide('"
					+ typeId + "')\">");
		else//否则显示空白图片
			content.append("<img src=images/blank.gif>");
		content.append("<img src=images/folder.gif><a href=\"#\"");//添加文件夹图片
		if (typeCanExpand(typeId))
			 content.append(" onClick=\"getPeopleTree('"+typeId+"')\"");
			content.append(">"+subType.getSubTypeName()+"</a>");
			content.append("</li>");
			//String typeString = content.toString();
			return content.toString();
			//out.print(typeString);
	}
	
	public String buildPeopleTree(People people) {

		StringBuffer content = new StringBuffer();
		int peopleId=people.getId().intValue();
		content.append("<li id=people" + peopleId + ">");//显示li元素
		content.append("<img src=images/blank.gif>");
		content.append("<img src=images/folder.gif><a href=\"#\"");//添加文件夹图片
		content.append(">"+people.getName()+"</a>");
		content.append("</li>");
		return content.toString();
	}
}