生成微信二维码

QRCodeUtils.java

@Component
public class QRCodeUtils {
	private static final Logger LOG = LogManager.getLogger(QRCodeUtils.class);

	private static final String APPID = "wxxxxxxxxx";
	private static final String SECRET = "xxxxxxx";
	private static final String GRANT_TYPE = "client_credential";

	private static final String TOKENURL = "https://api.weixin.qq.com/cgi-bin/token?";// 获取Token
	private static final String URL = "https://api.weixin.qq.com/wxa/getwxacodeunlimit";// 获取二维码
	
	
	@Resource
	HttpPost httpPost;


	@Resource(name = "terminalupload")
	private Properties terminalupload; 

	public void request(Long cid, Long pid, String imgpath) {
		Map<String, Object> mapColor = new HashMap<>();
		mapColor.put("r", "0");
		mapColor.put("g", "0");
		mapColor.put("b", "0");

		Map<String, Object> requestMap = new HashMap<>();
		String id = String.valueOf(cid);

		requestMap.put("scene",id);
		requestMap.put("page", "pages/main/main");
		requestMap.put("width", 430);
		requestMap.put("auto_color", false);
		requestMap.put("line_color", null);// mapColor

		// 发起请求
		String response = "";
		try {
			String access_token = getToken();
			response = httpPost.sendJsonObject2(URL + "?access_token=" + access_token, requestMap, pid, imgpath);
			LOG.info("获取二维码：" + response);
		} catch (Exception e) {
			LOG.error("获取二维码失败！", e);
		}
	}

	public String getToken() {
		Map<String, Object> requestParam = new HashMap<>();
		requestParam.put("appid", APPID);
		requestParam.put("secret", SECRET);
		requestParam.put("grant_type", GRANT_TYPE);
		// 发起请求
		String response = "";
		try {
			response = httpPost.sendJsonObject(TOKENURL + Joiner.on("&").withKeyValueSeparator("=").join(requestParam),
					GsonUtil.toJson(requestParam));
			LOG.info("Token:" + response);// access_token
			JSONObject responseJson = JSONObject.fromObject(response);
			return responseJson.optString("access_token");
		} catch (Exception e) {
			LOG.error("获取Token失败！", e);
		}
		return "";
	}

HttpPost.java

/**
	 * @param httpUrl
	 * @param object
	 * @return
	 */
	public String sendJsonObject(final String httpUrl, final Object object) throws Exception {
		CloseableHttpClient httpClient = null;
		CloseableHttpResponse response = null;
		try {
			httpClient = HttpClients.createDefault();
			RequestBuilder requestBuilder = RequestBuilder.get().setUri(new URI(httpUrl))
					.setConfig(Config.getRequestConfig());
			// params
			if (object == null) {
				requestBuilder.setEntity(new StringEntity(GsonUtil.toJson(null), ContentType.APPLICATION_JSON));
			}
			HttpUriRequest httpUriRequest = requestBuilder.build();
			response = httpClient.execute(httpUriRequest);
			return EntityUtils.toString(response.getEntity(), Consts.UTF_8);
		} finally {
			if (response != null) {
				response.close();
			}
			if (httpClient != null) {
				httpClient.close();
			}
		}
	}

/**
	 * @param httpUrl
	 * @param params
	 * @return
	 */
	public String sendJsonObject2(final String httpUrl, final Map<String, Object> params,Long pid,String imgUrl) throws Exception {
		CloseableHttpClient httpClient = null;
		CloseableHttpResponse response = null;
		FileOutputStream fout = null;
		InputStream in = null;
		String imgPath = String.valueOf(terminalupload.get("imgPath"));
        String wxa = String.valueOf(terminalupload.get("wxa"));
	    String imgUrlAssembly = imgPath+wxa+pid+"/";
	    
		try {
			httpClient = HttpClients.createDefault();
			RequestBuilder requestBuilder = RequestBuilder.post().setUri(new URI(httpUrl))
					.setConfig(Config.getRequestConfig());
			// params
			if (params != null && !params.isEmpty()) {
				requestBuilder.setEntity(new StringEntity(GsonUtil.toJson(params), ContentType.APPLICATION_JSON));
			}
			HttpUriRequest httpUriRequest = requestBuilder.build();
			response = httpClient.execute(httpUriRequest);
			HttpEntity httpEntity=response.getEntity(); //4、获取实体
		    in = httpEntity.getContent();
		    File file = new File(imgUrlAssembly);
		    if(!file.exists()) {
		    	file.mkdirs();
		    }
		    fout = new FileOutputStream(imgPath+wxa+imgUrl);
	        int l = -1;
	        byte[] tmp = new byte[1024];
	        while ((l = in.read(tmp)) != -1) {
	            fout.write(tmp, 0, l);
	        }
	        fout.flush();
	        fout.close();
	        in.close();
			return "SUCCEES";
		} finally {
			  // 关闭低层流。
			if (response != null) {
				response.close();
			}
			if (httpClient != null) {
				httpClient.close();
			}
		}
	}

Config.java

public class Config {

    public static RequestConfig getRequestConfig() {
        return RequestConfig.custom()
                .setConnectTimeout(12000) // 设置连接超时时间，单位毫秒。
                .setConnectionRequestTimeout(12000) // 设置从connect Manager获取Connection 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
                .setSocketTimeout(12000) // 请求获取数据的超时时间，单位毫秒。如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
                .build();
    }

    public static CloseableHttpClient getHttpClients(final File sslJks, final String sslPwd) throws CertificateException, NoSuchAlgorithmException, KeyStoreException, IOException, KeyManagementException {
        SSLContext sslcontext = SSLContexts.custom()
                .loadTrustMaterial(sslJks, sslPwd.toCharArray(),
                        new TrustSelfSignedStrategy())
                .build();
        SSLConnectionSocketFactory sslSf = new SSLConnectionSocketFactory(
                sslcontext,
                new String[]{"TLSv1"},
                null,
                SSLConnectionSocketFactory.getDefaultHostnameVerifier());
        return HttpClients.custom()
                .setSSLSocketFactory(sslSf)
                .build();
    }

    /**
     * 忽略证书验证请求
     */
    public static CloseableHttpClient createSSLClientDefault() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {
        SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
            //信任所有证书
            public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                return true;
            }
        }).build();
        SSLConnectionSocketFactory sslFactory = new SSLConnectionSocketFactory(sslContext);
        return HttpClients.custom().setSSLSocketFactory(sslFactory).build();
    }

}

GsonUtil.java

public class GsonUtil {

	   private static Gson GSON = new Gson();

	    public static <T> T fromJson(String json, Type type) {
	        return GSON.fromJson(json, type);
	    }

	    public static <T> T fromJson(String json, Class<T> classOfT) {
	        return GSON.fromJson(json, classOfT);
	    }

	    public static <T> T fromJsonp(String jsonp, Class<T> classOfT) {
	        String json = jsonp.substring(jsonp.indexOf("{"), jsonp.lastIndexOf("}") + 1);
	        return GSON.fromJson(json, classOfT);
	    }

	    public static String toJson(Object src) {
	        return GSON.toJson(src);
	    }

}