微信开发-获取access_token

	public static String getAccessToken() throws ClientProtocolException,
			IOException
	{
		String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";
		url = url + "&appid=" + 你的公众平台开发appId + "&secret=" + 你的公众平台appSecret;

		DefaultHttpClient client = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		HttpResponse httpResponse;
	
		httpResponse = client.execute(httpGet);

		int code = httpResponse.getStatusLine().getStatusCode();
		String strResult = EntityUtils.toString(httpResponse.getEntity(),WxData.CharSet);
		if (code == 200)
		{
			JSONObject jsonObject = JSONObject.fromObject(strResult);
			String token = jsonObject.getString("access_token");
			System.out.println(token);
			
		}
		

		return null;
	}

每天接口访问次数为2000次，所以要保存到全局变量中，7200s的技能持续时间；

所需要的jar包

commons-beanutils
commons-collections
commons-httpclient
commons-lang
commons-logging
json-lib-2.3-jdk15


httpcore-4.2.2
httpmime-4.2.3
httpclient-cache-4.2.3
httpclient-4.2.3