微信小程序调用微信登陆获取openid及java做为服务端示例

//调用登录接口，获取 code wx.login({  success: function (res) {   wx.getSetting({    success(setRes) {     // 判断是否已授权     if (!setRes.authSetting['scope.userInfo']) {      // 授权访问      wx.authorize({       scope: 'scope.userInfo',       success() {        //获取用户信息        wx.getUserInfo({         lang: "zh_CN",         success: function (userRes) {          //发起网络请求          wx.request({           url: config.loginWXUrl,           data: {            code: res.code,            encryptedData: userRes.encryptedData,            iv: userRes.iv           },           header: {            "Content-Type": "application/x-www-form-urlencoded"           },           method: 'POST',           //服务端的回掉           success: function (result) {            var data = result.data.result;            data.expireTime = nowDate + EXPIRETIME;            wx.setStorageSync("userInfo", data);            userInfo = data;           }          })         }        })       }      })     } else {      //获取用户信息      wx.getUserInfo({       lang: "zh_CN",       success: function (userRes) {        //发起网络请求        wx.request({         url: config.loginWXUrl,         data: {          code: res.code,          encryptedData: userRes.encryptedData,          iv: userRes.iv         },         header: {          "Content-Type": "application/x-www-form-urlencoded"         },         method: 'POST',         success: function (result) {          var data = result.data.result;          data.expireTime = nowDate + EXPIRETIME;          wx.setStorageSync("userInfo", data);          userInfo = data;         }        })       }      })     }    }   })  } }) 

<dependency>   <groupId>org.codehaus.xfire</groupId>   <artifactId>xfire-core</artifactId>   <version>1.2.6</version> </dependency> <dependency>   <groupId>org.bouncycastle</groupId>   <artifactId>bcprov-jdk16</artifactId>   <version>1.46</version> </dependency> 

/**  * 微信小程序信息获取  *  * @author zhy  */ public class WXAppletUserInfo {   private static Logger log = Logger.getLogger(WXAppletUserInfo.class);      /**    * 获取微信小程序 session_key 和 openid    *    * @author zhy    * @param code 调用微信登陆返回的Code    * @return    */   public static JSONObject getSessionKeyOropenid(String code){     //微信端登录code值     String wxCode = code;     ResourceBundle resource = ResourceBundle.getBundle("weixin");  //读取属性文件     String requestUrl = resource.getString("url"); //请求地址 https://api.weixin.qq.com/sns/jscode2session     Map<String,String> requestUrlParam = new HashMap<String,String>();     requestUrlParam.put("appid", resource.getString("appId")); //开发者设置中的appId     requestUrlParam.put("secret", resource.getString("appSecret")); //开发者设置中的appSecret     requestUrlParam.put("js_code", wxCode); //小程序调用wx.login返回的code     requestUrlParam.put("grant_type", "authorization_code");  //默认参数          //发送post请求读取调用微信 https://api.weixin.qq.com/sns/jscode2session 接口获取openid用户唯一标识     JSONObject jsonObject = JSON.parseObject(UrlUtil.sendPost(requestUrl, requestUrlParam));     return jsonObject;   }      /**    * 解密用户敏感数据获取用户信息    *    * @author zhy    * @param sessionKey 数据进行加密签名的密钥    * @param encryptedData 包括敏感数据在内的完整用户信息的加密数据    * @param iv 加密算法的初始向量    * @return    */   public static JSONObject getUserInfo(String encryptedData,String sessionKey,String iv){     // 被加密的数据     byte[] dataByte = Base64.decode(encryptedData);     // 加密秘钥     byte[] keyByte = Base64.decode(sessionKey);     // 偏移量     byte[] ivByte = Base64.decode(iv);     try {         // 如果密钥不足16位，那么就补足. 这个if 中的内容很重要       int base = 16;       if (keyByte.length % base != 0) {         int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);         byte[] temp = new byte[groups * base];         Arrays.fill(temp, (byte) 0);         System.arraycopy(keyByte, 0, temp, 0, keyByte.length);         keyByte = temp;       }       // 初始化       Security.addProvider(new BouncyCastleProvider());       Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");       SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");       AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");       parameters.init(new IvParameterSpec(ivByte));       cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化       byte[] resultByte = cipher.doFinal(dataByte);       if (null != resultByte && resultByte.length > 0) {         String result = new String(resultByte, "UTF-8");         return JSON.parseObject(result);       }     } catch (NoSuchAlgorithmException e) {       log.error(e.getMessage(), e);     } catch (NoSuchPaddingException e) {       log.error(e.getMessage(), e);     } catch (InvalidParameterSpecException e) {       log.error(e.getMessage(), e);     } catch (IllegalBlockSizeException e) {       log.error(e.getMessage(), e);     } catch (BadPaddingException e) {       log.error(e.getMessage(), e);     } catch (UnsupportedEncodingException e) {       log.error(e.getMessage(), e);     } catch (InvalidKeyException e) {       log.error(e.getMessage(), e);     } catch (InvalidAlgorithmParameterException e) {       log.error(e.getMessage(), e);     } catch (NoSuchProviderException e) {       log.error(e.getMessage(), e);     }     return null;   } } 

   /** * 向指定 URL 发送POST方法的请求 * * @param url 发送请求的 URL * @param param 请求参数 * @return 所代表远程资源的响应结果 */ ublic static String sendPost(String url, Map<String, ?> paramMap) {    PrintWriter out = null;    BufferedReader in = null;    String result = "";        String param = ""; Iterator<String> it = paramMap.keySet().iterator();  while(it.hasNext()) {   String key = it.next();   param += key + "=" + paramMap.get(key) + "&"; }     try {      URL realUrl = new URL(url);      // 打开和URL之间的连接      URLConnection conn = realUrl.openConnection();      // 设置通用的请求属性      conn.setRequestProperty("accept", "*/*");      conn.setRequestProperty("connection", "Keep-Alive");      conn.setRequestProperty("Accept-Charset", "utf-8");      conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");      // 发送POST请求必须设置如下两行      conn.setDoOutput(true);      conn.setDoInput(true);      // 获取URLConnection对象对应的输出流      out = new PrintWriter(conn.getOutputStream());      // 发送请求参数      out.print(param);      // flush输出流的缓冲      out.flush();      // 定义BufferedReader输入流来读取URL的响应      in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));      String line;      while ((line = in.readLine()) != null) {        result += line;      }    } catch (Exception e) {     log.error(e.getMessage(), e);    }    //使用finally块来关闭输出流、输入流    finally{      try{        if(out!=null){          out.close();        }        if(in!=null){          in.close();        }      }      catch(IOException ex){        ex.printStackTrace();      }    }    return result;  }