com.foxinmy.weixin4j.mp.api.QrApi Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of weixin4j-mp Show documentation
微信公众平台API
There is a newer version: 1.10.2
package com.foxinmy.weixin4j.mp.api;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import com.alibaba.fastjson.TypeReference;
import com.foxinmy.weixin4j.exception.WeixinException;
import com.foxinmy.weixin4j.http.weixin.WeixinResponse;
import com.foxinmy.weixin4j.model.Token;
import com.foxinmy.weixin4j.mp.model.QRParameter;
import com.foxinmy.weixin4j.mp.model.QRResult;
import com.foxinmy.weixin4j.token.TokenHolder;
import com.foxinmy.weixin4j.util.ConfigUtil;
import com.foxinmy.weixin4j.util.Weixin4jConst;

/**
 * 二维码相关API
 * 
 * @className QrApi
 * @author jy.hu
 * @date 2014年9月25日
 * @since JDK 1.7
 * @see 二维码支持
 */
public class QrApi extends MpApi {

	private final TokenHolder tokenHolder;

	public QrApi(TokenHolder tokenHolder) {
		this.tokenHolder = tokenHolder;
	}

	/**
	 * 生成带参数的二维码
	 * 
	 * @param parameter
	 *            二维码参数
	 * @return 二维码结果对象
	 * @throws WeixinException
	 * @see com.foxinmy.weixin4j.mp.model.QRResult
	 * @see com.foxinmy.weixin4j.mp.model.QRParameter
	 * @see 生成二维码
	 */
	public QRResult createQR(QRParameter parameter) throws WeixinException {
		Token token = tokenHolder.getToken();
		String qr_uri = getRequestUri("qr_ticket_uri");
		WeixinResponse response = weixinClient.post(
				String.format(qr_uri, token.getAccessToken()),
				parameter.getContent());
		QRResult result = response.getAsObject(new TypeReference() {
		});
		qr_uri = getRequestUri("qr_image_uri");
		response = weixinClient.get(String.format(qr_uri, result.getTicket()));
		result.setContent(response.getContent());
		return result;
	}

	/**
	 * 生成带参数的二维码
	 * 
	 * 二维码分为临时跟永久两种,扫描时触发推送带参数事件
	 * 
	 * 
	 * @param parameter
	 *            二维码参数
	 * @return 硬盘存储的文件对象
	 * @throws WeixinException
	 * @see 二维码
	 * @see #createQR(QRParameter)
	 * @see com.foxinmy.weixin4j.mp.model.QRParameter
	 */
	public File createQRFile(QRParameter parameter) throws WeixinException {
		String qr_path = ConfigUtil.getValue("qr_path",
				Weixin4jConst.DEFAULT_QRCODE_PATH);
		String filename = String.format("%s_%s_%d.jpg", parameter.getQrType()
				.name(), parameter.getSceneValue(), parameter
				.getExpireSeconds());
		File file = new File(qr_path + File.separator + filename);
		if (parameter.getQrType().ordinal() > 0 && file.exists()) {
			return file;
		}
		QRResult qrResult = createQR(parameter);
		OutputStream os = null;
		try {
			os = new FileOutputStream(file);
			os.write(qrResult.getContent());
		} catch (IOException e) {
			throw new WeixinException(e.getMessage());
		} finally {
			try {
				if (os != null) {
					os.close();
				}
			} catch (IOException e) {
				;
			}
		}
		return file;
	}
}