private String getToken() throws MalformedURLException, IOException, ProtocolException {
		// access_token接口https请求方式: GET https://api.weixin.qq.com/cgi-bin/token" https://api.weixin.qq.com/cgi-bin/token";
		String appid = "公众号的开发者ID(AppID)";
		String secret = "公众号的开发者密码(AppSecret)";
		URL url = new URL(path+"&appid=" + appid + "&secret=" + secret);
		HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
		connection.setRequestMethod("GET");
		connection.connect();
		
		InputStream in = connection.getInputStream();
		byte[] b = new byte[100];
		int len = -1;
		StringBuffer sb = new StringBuffer();
		while((len = in.read(b)) != -1) {
			sb.append(new String(b,0,len));
		}
		
		System.out.println(sb.toString());
		in.close();
		return sb.toString();
	}

private String getContentList(String token) throws IOException {
		String path = " https://api.weixin.qq.com/cgi-bin/material/batchget_material" + token;
		URL url = new URL(path);
		HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
		connection.setRequestMethod("POST");
		connection.setDoOutput(true);
		connection.setRequestProperty("content-type", "application/json;charset=utf-8");
		connection.connect();
		// post发送的参数
		Map<String, Object> map = new HashMap<>();
		map.put("type", "news"); // news表示图文类型的素材，具体看API文档
		map.put("offset", 0);
		map.put("count", 1);
		// 将map转换成json字符串
		String paramBody = JSON.toJSONString(map); // 这里用了Alibaba的fastjson
		
		OutputStream out = connection.getOutputStream();
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(out));
		bw.write(paramBody); // 向流中写入参数字符串
		bw.flush();
		
		InputStream in = connection.getInputStream();
		byte[] b = new byte[100];
		int len = -1;
		StringBuffer sb = new StringBuffer();
		while((len = in.read(b)) != -1) {
			sb.append(new String(b,0,len));
		}
		
		in.close();
		return sb.toString();
	}

@Test
	public void test() throws IOException {
		
		String result1 = getToken();
		Map<String,Object> token = (Map<String, Object>) JSON.parseObject(result1);
		String result2 = getContentList(token.get("access_token").toString());
		System.out.println(result2);
	}