微信&java 开发6 全局缓存access_token与jsapi_ticket
access_token与jsapi_ticket 需要全局缓存为什么我就不说了，既然来看了就应该知道了
我用的是spring容器加载完毕后监听器，就是容器加载完毕调用 ApplicationListener
这样可以获取access_token jsapi_ticket 缓存到servletcontext中（servletcontext全局容易 全局唯一 全局共享）
首先看一下全局servletcontext
import javax.servlet.ServletContext;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
/**
* @ClassName: ServletContextUtil
* @author yangwl
* @date 2016年5月11日 下午4:54:16
* @Description:
* 全局缓存servletcontext
*/
public final class ServletContextUtil {
private static ServletContext serveltContext = null;
private ServletContextUtil(){};
public synchronized static ServletContext get() {
if(null == serveltContext) {
WebApplicationContext webApplicationContext = ContextLoader.getCurrentWebApplicationContext();
serveltContext = webApplicationContext.getServletContext();
}
return serveltContext;
}
}2. 看一下容器加载完毕监听器 ApplicationListener
ScheduledExecutorService这个是调度service
因为access_token为7200有效期， 所以这里间隔7000调用一次就够了
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import com.yi.wx.AccessTokenUtil;
public class JobForWXAccessTokenListener implements ApplicationListener {
public void onApplicationEvent(ContextRefreshedEvent event) {
if(event.getApplicationContext().getParent() == null){
Runnable runnable = new Runnable() {
public void run() {
/**
* 定时设置accessToken
*/
AccessTokenUtil.initAndSetAccessToken();
}
};
ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();
service.scheduleAtFixedRate(runnable, 1, 7000, TimeUnit.SECONDS);
}
}
3. AccessTokenUtil.initAndSetAccessToken(); 设置并缓存
private static Logger log = LoggerFactory.getLogger(AccessTokenUtil.class);
// 获取access_token的接口地址（GET） 限200（次/天）
public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
//采用http GET方式请求获得jsapi_ticket
private static final String JSAPI_TICKET = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";
/**
* @Author:yangwl
* @date 2016年5月11日 下午5:25:03
* @Description: //设置access_token
*/
public static void initAndSetAccessToken() {
log.info("execute initAndSetAccessToken Start : {}", System.currentTimeMillis());
Properties prop = new Properties();
try {
InputStream in = AccessTokenUtil.class.getResourceAsStream("/properties/web.properties");
prop.load(in);
} catch (IOException e) {
log.info("execute initAndSetAccessToken {}", e.getMessage());
}
String appid = prop.getProperty(Contants.APPID);
String appsecret = prop.getProperty(Contants.APPSECRET);
if(!appid.isEmpty() && !appsecret.isEmpty()) {
AccessToken accessToken = getAccessToken(appid,appsecret);
if(null != accessToken) {
/**
* cache access_token
*/
ServletContext sc = ServletContextUtil.get();
sc.removeAttribute(Contants.ACCESS_TOKEN);
sc.setAttribute(Contants.ACCESS_TOKEN, accessToken);
/**
* cache jsapi_ticket
*/
JsApiTicket jsApiTicket = getJsApiTicket(accessToken.getToken());
if(null != jsApiTicket) {
sc.removeAttribute(Contants.JSAPI_TICKET);
sc.setAttribute(Contants.JSAPI_TICKET, jsApiTicket);
}
//这里可以向数据库中写access_token
}
} else {
log.info("execute initAndSetAccessToken appid,appsecret 为空.{}");
}
log.info("execute initAndSetAccessToken End : {}", System.currentTimeMillis());
}/**
* 获取access_token
*
* @param appid 凭证
* @param appsecret 密钥
* @return
*/
public static AccessToken getAccessToken(String appid, String appsecret) {
AccessToken accessToken = null;
String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
// 如果请求成功
if (null != jsonObject) {
try {
accessToken = new AccessToken();
accessToken.setToken(jsonObject.getString("access_token"));
accessToken.setExpiresIn(jsonObject.getInt("expires_in"));
} catch (JSONException e) {
accessToken = null;
// 获取token失败
log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
}
}
return accessToken;
}
public static JsApiTicket getJsApiTicket(String accessToken) {
JsApiTicket jsApiTicket = null;
String requestUrl = JSAPI_TICKET.replace("ACCESS_TOKEN", accessToken);
JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
// 如果请求成功
if (null != jsonObject) {
try {
jsApiTicket = new JsApiTicket();
jsApiTicket.setTicket(jsonObject.getString("ticket"));
jsApiTicket.setExpiresIn(jsonObject.getInt("expires_in"));
} catch (JSONException e) {
accessToken = null;
// 获取jsApiTicket失败
log.error("获取jsApiTicket失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
}
}
return jsApiTicket;
}
/**
* 发起https请求并获取结果
*
* @param requestUrl 请求地址
* @param requestMethod 请求方式（GET、POST）
* @param outputStr 提交的数据
* @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
*/
public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
JSONObject jsonObject = null;
StringBuffer buffer = new StringBuffer();
try {
// 创建SSLContext对象，并使用我们指定的信任管理器初始化
TrustManager[] tm = { new MyX509TrustManager() };
SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
sslContext.init(null, tm, new java.security.SecureRandom());
// 从上述SSLContext对象中得到SSLSocketFactory对象
SSLSocketFactory ssf = sslContext.getSocketFactory();
URL url = new URL(requestUrl);
HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
httpUrlConn.setSSLSocketFactory(ssf);
httpUrlConn.setDoOutput(true);
httpUrlConn.setDoInput(true);
httpUrlConn.setUseCaches(false);
// 设置请求方式（GET/POST）
httpUrlConn.setRequestMethod(requestMethod);
if ("GET".equalsIgnoreCase(requestMethod))
httpUrlConn.connect();
// 当有数据需要提交时
if (null != outputStr) {
OutputStream outputStream = httpUrlConn.getOutputStream();
// 注意编码格式，防止中文乱码
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 将返回的输入流转换成字符串
InputStream inputStream = httpUrlConn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
// 释放资源
inputStream.close();
inputStream = null;
httpUrlConn.disconnect();
jsonObject = JSONObject.fromObject(buffer.toString());
} catch (ConnectException ce) {
log.error("Weixin server connection timed out.");
} catch (Exception e) {
log.error("https request error:{}", e);
}
return jsonObject;
}/**
* @Author:yangwl
* @date 2016年5月11日 下午4:57:33
* @return
* @Description: //获取access_token
*/
public static AccessToken getAccessToken() {
return (AccessToken) ServletContextUtil.get().getAttribute(Contants.ACCESS_TOKEN);
}