这篇文章主要介绍了利用java开发微信实现微信主动推送消息实例,需要的朋友可以参考下

1.拉取access_token

2.拉取用户信息

3.主动推送消息

4.接口貌似要申请权限

5.依赖httpclient4.2.3 和jackson 2.2.1

代码如下:public class WeixinAPIHelper {

/**

* 获取token接口

*/

private String getTokenUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}";

/**

* 拉微信用户信息接口

*/

private String getUserInfoUrl = "https://api.weixin.qq.com/cgi-bin/user/info?access_token={0}&openid={1}";

/**

* 主动推送信息接口

*/

private String sendMsgUrl = "https://api.weixin.qq.com/cgi-bin/message/send?access_token={0}";

private HttpClient webClient;

private Log log = LogFactory.getLog(getClass());

public void initWebClient(String proxyHost, int proxyPort){

this.initWebClient();

if(webClient != null && !StringUtils.isEmpty(proxyHost)){

HttpHost proxy = new HttpHost(proxyHost, proxyPort);

webClient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY, proxy);

}

}

/**

* @desc 初始化创建 WebClient

*/

public void initWebClient() {

log.info("initWebClient start....");

try {

PoolingClientConnectionManager tcm = new PoolingClientConnectionManager();

tcm.setMaxTotal(10);

SSLContext ctx = SSLContext.getInstance("TLS");

X509TrustManager tm = new X509TrustManager() {

public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {

}

public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {

}

public X509Certificate[] getAcceptedIssuers() {

return null;

}

};

ctx.init(null, new X509TrustManager[] { tm }, null);

SSLSocketFactory ssf = new SSLSocketFactory(ctx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

Scheme sch = new Scheme("https", 443, ssf);

tcm.getSchemeRegistry().register(sch);

webClient = new DefaultHttpClient(tcm);

} catch (Exception ex) {

log.error("initWebClient exception", ex);

} finally {

log.info("initWebClient end....");

}

}

/**

* @desc 获取授权token

* @param appid

* @param secret

* @return

*/

public String getAccessToken(String appid, String secret) {

String accessToken = null;

try {

log.info("getAccessToken start.{appid=" + appid + ",secret:" + secret + "}");

String url = MessageFormat.format(this.getTokenUrl, appid, secret);

String response = executeHttpGet(url);

accessToken = JsonUtils.read(response, "access_token");

} catch (Exception e) {

log.error("get access toekn exception", e);

}

return accessToken;

}

/**

* @desc 推送信息

* @param token

* @param msg

* @return

*/

public String sendMessage(String token,String msg){

try{

log.info("sendMessage start.token:"+token+",msg:"+msg);

String url = MessageFormat.format(this.sendMsgUrl, token);

HttpPost post = new HttpPost(url);

ResponseHandler> responseHandler = new BasicResponseHandler();

StringEntity entity = new StringEntity(msg);

post.setEntity(entity);

String response = (String) this.webClient.execute(post, responseHandler);

log.info("return response=====start======");

log.info(response);

log.info("return response=====end======");

return response;

}catch (Exception e) {

log.error("get user info exception", e);

return null;

}

}

/**

* @desc 拉取用户信息

* @param token

* @param openid

* @return

*/

public WeixinOpenUser getUserInfo(String token, String openid) {

try {

log.info("getUserInfo start.{token:" + token + ",openid:" + openid + "}");

String url = MessageFormat.format(this.getUserInfoUrl, token, openid);

String response = executeHttpGet(url);

JsonNode json = JsonUtils.read(response);

if (json.get("openid") != null) {

WeixinOpenUser user = new WeixinOpenUser();

user.setOpenUserId(json.get("openid").asText());

user.setState(json.get("subscribe").asText());

if ("1".equals(user.getState())) {

user.setUserName(json.get("nickname").asText());

user.setSex(json.get("sex").asText());

user.setCity(json.get("city").asText());

user.setLanguage(json.get("language").asText());

}

return user;

}

} catch (Exception e) {

log.error("get user info exception", e);

}

return null;

}

/**

* @desc 发起HTTP GET请求返回数据

* @param url

* @return

* @throws IOException

* @throws ClientProtocolException

*/

private String executeHttpGet(String url) throws IOException, ClientProtocolException {

ResponseHandler> responseHandler = new BasicResponseHandler();

String response = (String) this.webClient.execute(new HttpGet(url), responseHandler);

log.info("return response=====start======");

log.info(response);

log.info("return response=====end======");

return response;

}

}