EXT Tree AJAX JSON的简单实现
首先定义一个通用的 Ext Tree Bean的接口,主要包括 id,name,和child属性package com.marcoframe.core.business.businessobj;import java.util.Set;public interface ExtTreeJSONObject { public String getOid(); public void setOid();public String getName();public void setName(String name);public Set getChildren();public void setChildren(Set children);}
然后编写一个工具类，递归的方式遍历树，返回Ext Tree 所需要的json字符串
package com.marcoframe.core.business.util.json;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.List;import net.sf.json.JSONArray;import com.marcoframe.core.business.businessobj.ExtTreeJSONObject;public class JSONUtil {public static String getExtJSONTreeStr(ExtTreeJSONObject object){JSONArray array = JSONArray.fromObject(ExtTreeJsonMap(object,null));return array.toString();}private static Map ExtTreeJsonMap(ExtTreeJSONObject object,List childList){String id = object.getOid();String text = object.getName();Map jsonMap = new HashMap();jsonMap.put("id", id);jsonMap.put("text", text);if(childList != null)childList.add(jsonMap);if(object.getChildren() == null || object.getChildren().size() == 0)jsonMap.put("leaf", "true");else{List children = new ArrayList();jsonMap.put("children", children);for(Iterator it = object.getChildren().iterator();it.hasNext();){ExtTreeJSONObject child = (ExtTreeJSONObject) it.next();ExtTreeJsonMap(child,children);}}return jsonMap;}}
运行结果如下：
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