java json 树形结构 json树状结构遍历

最近研究了下android   发现ANDROID 中提供的JSON  在JAVA PROJECT 中调用会报异常 还以为那格式不对弄了半天

对于数据的提取 不多说 附上代码

 

public class LoadMenuList extends BaseProtocol {
  
  private final static String URL = "http://192.168.80.145:8383/plat_orcl/account/menu!getUserMenusSource.action";
  
  public boolean loadMenuListInfo(String params) {
   try {
 //   addNameValuePair("username", usr.getUsername());
 //   addNameValuePair("password", usr.getPassword());
   //请求服务器并获取返回结果,这里返回JSON
   pack(URL);
    StringBuilder sbb = parse();
        JSONObject obj = null;
    if(sbb != null && sbb.indexOf("[") != -1 && sbb.indexOf("]") != -1  && sbb.lastIndexOf("]") == sbb.length()-1){
     obj = new JSONObject(sbb.substring(1,sbb.length()-1).replaceAll("\"children\":null", "\"children\":[]"));
    }else{
     obj = this.getJSON(sbb.toString());
    }
    
    StringBuilder  strb = new StringBuilder();
    ArrayList<JSONObject> childrenList = getChildrenJSONArrayList(obj);
    
    getAllListMenuText(childrenList,strb);
    
    System.out.println(strb);
   } catch (Exception e) {
    e.printStackTrace();
   }
   return false;
  }
  
  /**
   * 获取菜单信息的调用方法
   * @param childrenList
   * @param tempSb
   * @throws Exception
   */
  public void getAllListMenuText(ArrayList<JSONObject> childrenList,StringBuilder tempSb)
    throws Exception{
   for (JSONObject jsonObject : childrenList) {
    tempSb.append(jsonObject.get("text")+" | ");
    System.out.println(jsonObject.get("text"));
    
    ArrayList<JSONObject>  childrenList2 = getChildrenJSONArrayList(jsonObject);
    if(childrenList2 != null && childrenList2.size()>0){
      getAllListMenuText(childrenList2,tempSb); //递过调用，遍历当前根节点
    }
   }
  }
  
  /**
   * 作为存放根节点对象的调用方法，这里返回JSON用  children 存放子节点
   * @param obj
   * @return
   * @throws Exception
   */
  public ArrayList<JSONObject> getChildrenJSONArrayList(JSONObject obj) throws Exception{
   ArrayList<JSONObject> jsonlist = new ArrayList<JSONObject>();
   JSONArray nameList = obj.getJSONArray("children");
   
   for (int i = 0; i < nameList.length(); i++) {
    jsonlist.add((JSONObject)nameList.opt(i)); 
   }
   return jsonlist;
  }

 

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