private void doSearch(){
		final String key = textField.getText();
		if (key == null || key.equals("")) {
			JOptionPane.showMessageDialog(this, "请输入歌曲名或歌手");
			return ;
		}
		new Thread(){
			@Override
			public void run(){
				try {
					JSONArray resultJson = HttpUtil.get("http://www.xiami.com/web/search-songs?_xiamitoken=452ee4737d91d56cea00cb5a38860058&key=" + key);
					searchList.clear();
					for(int i=0; i<resultJson.size(); i++){
						JSONObject obj = resultJson.getJSONObject(i);
						String title = obj.getString("title");
						String author = obj.getString("author");
						String path = obj.getString("src");
						String cover = obj.getString("cover");
						PlayListItem playItem = new PlayListItem(title, author, path, cover, false);
						searchList.append(playItem);
					}
					searchPanel.setVisible(true);
				} catch (ClientProtocolException e1) {
					e1.printStackTrace();
				} catch (IOException e1) {
					e1.printStackTrace();
				}
			}
		}.start();
	}