微信开发总结 五

1.二维码

public class QRCode {
	private String ticket;
	private int expireSeconds;
	private String url;
	

2.二维码常量

public class QRCodeConstant {
	/**创建二维码 POST*/
	public static final String QRCODE_CREATE_URL="https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=ACCESS_TOKEN";
	
	/**通过ticket获取二维码 GET*/
	public static final String QRCODE_TICKET_URL="https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=TICKET";
	
}

3.工具类

public class QRCodeUtil {
	/**
	 * 创建临时二维码
	 * @author wuyw
	 * 2015-7-30下午12:30:44
	 * @param accessToken
	 * @param expireSeconds
	 * @param sceneId 场景值ID，临时二维码时为32位非0整型，永久二维码时最大值为100000（目前参数只支持1--100000）
	 * @return
	 */
	public static QRCode createTemporaryQRCode(String accessToken, int expireSeconds, int sceneId) {
		QRCode code = new QRCode();
		String requestUrl = QRCodeConstant.QRCODE_CREATE_URL.replace("ACCESS_TOKEN", accessToken);
		String jsonMsg = "{\"expire_seconds\": %d, \"action_name\": \"QR_SCENE\", \"action_info\": {\"scene\": {\"scene_id\": %d}}";
		
		JSONObject jsonObject = TokenUtil.httpsRequest(requestUrl, BaseConstant.TOKEN_URL_POST, String.format(jsonMsg, expireSeconds, sceneId));
		
		if (null != jsonObject) {
			code.setTicket(jsonObject.getString("ticket"));
			code.setExpireSeconds(jsonObject.getInt("expire_seconds"));
			code.setUrl(jsonObject.getString("url"));
		}
		
		return code;
	}
	
	/**
	 * 创建永久二维码
	 * @author wuyw
	 * 2015-7-30下午12:31:14
	 * @param accessToken
	 * @param sceneId
	 * @return
	 */
	public static QRCode createPermanentQRCode(String accessToken, int sceneId) {
		QRCode code = new QRCode();
		String requestUrl = QRCodeConstant.QRCODE_CREATE_URL.replace("ACCESS_TOKEN", accessToken);
		String jsonMsg = "{\"action_name\": \"QR_LIMIT_SCENE\", \"action_info\": {\"scene\": {\"scene_id\": %d}}";
		
		JSONObject jsonObject = TokenUtil.httpsRequest(requestUrl, BaseConstant.TOKEN_URL_POST, String.format(jsonMsg, sceneId));
		
		if (null != jsonObject) {
			code.setTicket(jsonObject.getString("ticket"));
			code.setExpireSeconds(jsonObject.getInt("expire_seconds"));
			code.setUrl(jsonObject.getString("url"));
		}
		
		return code;
	}
	
	/**
	 * 根据ticket获取二维码图片
	 * @author wuyw
	 * 2015-7-30下午12:32:47
	 * @param accessToken
	 * @param ticket
	 * @return
	 */
	public static String getQRCode(String ticket, String savePath) {
		String filePath = null;
		String requestUrl = QRCodeConstant.QRCODE_TICKET_URL.replace("TICKET", SignUtil.urlEncodeUTF8(ticket));
		
		try {
			URL url = new URL(requestUrl);
			HttpsURLConnection connection = (HttpsURLConnection) url
					.openConnection();
			connection.setDoInput(true);
			connection.setRequestMethod(BaseConstant.TOKEN_URL_GET);
			if (!savePath.endsWith("/")) {
				savePath += "/";
			}
			filePath = savePath + ticket + ".jpg";
			BufferedInputStream bis = new BufferedInputStream(
					connection.getInputStream());
			FileOutputStream fos = new FileOutputStream(new File(filePath));
			byte[] buf = new byte[2048];
			int size = 0;
			while ((size = bis.read(buf)) != -1) {
				fos.write(buf, 0, size);
			}
			fos.close();
			bis.close();
			connection.disconnect();
		} catch (Exception e) {
			e.printStackTrace();
		}
		
		return filePath;
	}
}