本文针对《微信公众平台应用开发:方法、技巧与案例》 一书中示例和代码不适用于微信企业号的情况进行修改。
修改原因:
企业号操作的链接不一样,企业号存在多个应用,因此需要支持程序ID问题
修改方法:
修改CommonUtil类
注意事项:获得AccessToken接口频率有限制,建议进行缓存,注意有效期,本文写作时候是access_token有效期是7200秒,也就是两小时。
/**
* 通用工具类
*
* @author liufeng
* @date 2013-10-17
*/
public class CommonUtil {
// 凭证获取(GET)
public final static String token_url =
"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
static String EnterToken_url =
"https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=ENID&corpsecret=ENSECRET";
static Token token = null;
/**
* 发送https请求
*
* @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 httpsRequest(String requestUrl,
String requestMethod,
String outputStr) {
JSONObject jsonObject = null;
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 conn = (HttpsURLConnection)url.openConnection();
conn.setSSLSocketFactory(ssf);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
// 设置请求方式(GET/POST)
conn.setRequestMethod(requestMethod);
// 当outputStr不为null时向输出流写数据
if (null != outputStr) {
OutputStream outputStream = conn.getOutputStream();
// 注意编码格式
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = conn.getInputStream();
InputStreamReader inputStreamReader =
new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader =
new BufferedReader(inputStreamReader);
String str = null;
StringBuffer buffer = new StringBuffer();
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
// 释放资源
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
inputStream = null;
conn.disconnect();
jsonObject = JSONObject.fromObject(buffer.toString());
} catch (ConnectException ce) {
MyLog.writelogfile("连接超时:{}", ce);
} catch (Exception e) {
MyLog.writelogfile("https请求异常:{}", e);
}
return jsonObject;
}
/**
* 获取接口访问凭证
*
* @param appid 凭证
* @param appsecret 密钥
* @return
*/
public static Token getToken(String corpid, String appsecret) {
if (null == token || "".equals(token.getAccessToken()) ||
(new Date().getTime() - token.getAccess_token_date().getTime()) >=
(token.getExpiresIn() * 1000)) {
String requestUrl =
token_url.replace("APPID", corpid).replace("APPSECRET",
appsecret);
// 发起GET请求获取凭证
JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);
if (null != jsonObject) {
try {
token = new Token();
token.setAccessToken(jsonObject.getString("access_token"));
token.setExpiresIn(jsonObject.getInt("expires_in"));
} catch (JSONException e) {
token = null;
// 获取token失败
MyLog.writelogfile("获取token失败 errcode:{} errmsg:{}",
jsonObject.getInt("errcode"),
jsonObject.getString("errmsg"));
}
}
}
return token;
}
public static Token EntergetToken(String appid, String appsecret) {
if (null == token || "".equals(token.getAccessToken()) ||
(new Date().getTime() - token.getAccess_token_date().getTime()) >=
(token.getExpiresIn() * 1000)) {
String requestUrl =
EnterToken_url.replace("ENID", appid).replace("ENSECRET",
appsecret);
// 发起GET请求获取凭证
JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);
if (null != jsonObject) {
try {
token = new Token();
token.setAccessToken(jsonObject.getString("access_token"));
token.setExpiresIn(jsonObject.getInt("expires_in"));
} catch (JSONException e) {
token = null;
// 获取token失败
MyLog.writelogfile("获取token失败 errcode:{} errmsg:{}",
jsonObject.getInt("errcode"),
jsonObject.getString("errmsg"));
}
}
}
return token;
}
}