整合帐单拉取功能

pom.xml

@@ -170,6 +170,16 @@
 			<artifactId>commons-dbcp</artifactId>
 			<version>1.4</version>
 		</dependency>
+		<dependency>
+			<groupId>com.alibaba</groupId>
+			<artifactId>fastjson</artifactId>
+			<version>1.2.6</version>
+		</dependency>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>18.0</version>
+		</dependency>
 	</dependencies>
 	<build>
 		<plugins>

src/main/java/cn/gq/financial/app/RepayFinancialAPP.java

 package cn.gq.financial.app;
 
+import cn.gq.financial.bills.AbstractBills;
+import cn.gq.financial.bills.UMPayBills;
+import cn.gq.financial.bills.WeichatBills;
+import cn.gq.financial.bills.PayType;
 import cn.gq.financial.service.FinancialRepayDetailService;
 import cn.gq.financial.utils.Constants;
+import com.google.common.base.Joiner;
+import org.apache.commons.io.FileUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
@@ -12,51 +18,65 @@ import cn.gq.financial.model.bill.UMPayBill;
 import cn.gq.financial.model.bill.WXBill;
 import cn.gq.financial.model.bill.YeepayBill;
 
-import java.util.concurrent.TimeUnit;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Paths;
 
 public class RepayFinancialAPP {
 	private static final Logger LOGGER = LoggerFactory.getLogger(RepayFinancialAPP.class);
 
 	static final String CONFIG_LOCAL = "applicationContext.xml";
-	static Integer month = 8;
-	// static String SRC_BILL_PATH = "E:\\financial-system-data\\weichat\\baitiao"; //微信白条
-	// static String SRC_BILL_PATH = "E:\\financial-system-data\\weichat\\xianjindai"; //微信现金贷
 
-	// static String SRC_BILL_PATH = "E:\\financial-system-data\\umpay\\baitiao"; //联动优势白条
-	// static String SRC_BILL_PATH = "E:\\financial-system-data\\umpay\\xianjindai"; //联动优势现金贷
+	static final String ROOT_DIR = "E:\\financial-system-data\\";
+	/**
+	 * Tip: 对帐单时 只需修改currentMonth和payType
+	 * currentMonth 当前是几月就输入几 无须减1 后续代码里面已经处理
+	 */
+	static Integer currentMonth = 9;
 
-	static String SRC_BILL_PATH = "E:\\financial-system-data\\yeepay\\xianjindai"; //易宝现金贷
+	static PayType payType = PayType.UMPay_Xjd;
 
-	static String payAprroach = "易宝";
+	static AbstractBills bill;
 
-
-	static String payAccount = "易宝-现金贷账户";
+	static String path = "";
 
 	private static ClassPathXmlApplicationContext context = null;
 
 	static Class<? extends Bill> clazz = null;
 
 	static {
-		switch (payAprroach) {
+		path = Joiner.on(File.separator).join(ROOT_DIR, payType.path());
+		switch (payType.getChannelName()) {
 			case "微信":
+				bill = new WeichatBills(currentMonth, path);
 				clazz = WXBill.class;
 				break;
 			case "易宝":
 				clazz = YeepayBill.class;
 				break;
 			case "联动":
+				bill = new UMPayBills(currentMonth, path);
 				clazz = UMPayBill.class;
 				break;
 		}
+		// 拉取帐单前先清理目录
+		if (Paths.get(path).toFile().exists()) {
+			try {
+				FileUtils.cleanDirectory(Paths.get(path).toFile());
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+		bill.pullBills(payType);
 	}
 
 	public static void main(String[] args) throws Exception {
 		try {
-			LOGGER.info("======开始处理还款账单======");
+			LOGGER.info("======开始处理[" + path + "]目录下面的还款账单======");
 			long begin = System.currentTimeMillis();
 			RepayHandler handler = getSpringContext().getBean(RepayHandler.class);
 			//按照参数，对账
-			handler.repayBillDetailHandler(SRC_BILL_PATH, clazz, payAccount, month + 1);
+			handler.repayBillDetailHandler(Joiner.on(File.separator).join(ROOT_DIR, payType.path()), clazz, payType.getChannelAccount(), currentMonth);
 			FinancialRepayDetailService repayDetailService = getSpringContext().getBean(FinancialRepayDetailService.class);
 			if (Constants.result.size() != 0) {
 				repayDetailService.saveDetails(Constants.result);

src/main/java/cn/gq/financial/bills/AbstractBills.java

+package cn.gq.financial.bills;
+
+import cn.gq.financial.utils.MD5Utils;
+import com.google.common.base.Joiner;
+import com.google.common.collect.Lists;
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.time.FastDateFormat;
+import org.apache.http.NameValuePair;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Calendar;
+import java.util.EnumMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Created with IntelliJ IDEA
+ * User: zhiyong.fan
+ * Date: 2016/10/11
+ * Time: 10:27
+ * Desc: 帐单拉取抽象类
+ */
+public abstract class AbstractBills {
+
+	private static final Logger LOGGER = LoggerFactory.getLogger(AbstractBills.class);
+
+	/**
+	 * 日期格式
+	 */
+	protected static FastDateFormat dateFormat = FastDateFormat.getInstance("yyyyMMdd");
+	/**
+	 * 连接请求配置
+	 */
+	protected RequestConfig config = RequestConfig.custom().setConnectTimeout(300 * 1000).build();
+	/**
+	 * 帐单日期 以天为单位
+	 */
+	protected List<String> billDates;
+	/**
+	 * 帐单存放目录
+	 */
+	protected String billDir;
+	/**
+	 * 当前月
+	 */
+	protected int currentMonth;
+	/**
+	 * 请求接口地址
+	 */
+	protected String url;
+
+	public AbstractBills() {
+
+	}
+
+	public AbstractBills(int currentMonth, String billDir, String url) {
+		billDates = Lists.newArrayList();
+		this.currentMonth = currentMonth;
+		this.billDir = billDir;
+		this.url = url;
+		initBillDates();
+	}
+
+	/**
+	 * 拉取帐单
+	 *
+	 * @param payType 支付方式
+	 */
+	public void pullBills(PayType payType) {
+		LOGGER.info("正在拉取[" + payType.getChannelAccount() + "]帐单信息, 请稍等......");
+		String xml = "";
+		UrlEncodedFormEntity encodedFormEntity;
+		for (String billDate : billDates) {
+			HttpPost post = new HttpPost(url);
+			post.setConfig(config);
+			EnumMap<PayType, Map<String, String>> params = assembleReqUrlParams(billDate);
+			Map<String, String> body = params.get(payType);
+			if (StringUtils.equals("微信", payType.getChannelName())) {
+				String signer = MD5Utils.build(Joiner.on("&").join(body.entrySet())).toUpperCase();
+				xml = "<xml>\n" +
+						"  <appid>" + body.get("appid") + "</appid>\n" +
+						"  <bill_date>" + body.get("bill_date") + "</bill_date>\n" +
+						"  <bill_type>" + body.get("bill_type") + "</bill_type>\n" +
+						"  <mch_id>" + body.get("mch_id") + "</mch_id>\n" +
+						"  <nonce_str>" + body.get("nonce_str") + "</nonce_str>\n" +
+						"  <sign>" + signer + "</sign>\n" +
+						"</xml>";
+				StringEntity entity = new StringEntity(xml, "UTF-8");
+				entity.setContentEncoding("UTF-8");
+				entity.setContentType("text/xml");
+				post.setEntity(entity);
+			} else {
+				encodedFormEntity = new UrlEncodedFormEntity(assembleRequestBody(body), Charset.forName("UTF-8"));
+				post.setEntity(encodedFormEntity);
+			}
+			doRequest(post, billDate);
+		}
+		LOGGER.info("[" + payType.getChannelAccount() + "]帐单信息拉取完成......");
+	}
+
+	/**
+	 * 组装post请求消息体
+	 *
+	 * @param params post请求消息体
+	 * @return 消息体集合
+	 */
+	private List<NameValuePair> assembleRequestBody(Map<String, String> params) {
+		List<NameValuePair> pairs = Lists.newArrayList();
+		params.entrySet().forEach(entry -> pairs.add(new BasicNameValuePair(entry.getKey(), entry.getValue())));
+		return pairs;
+	}
+
+	/**
+	 * 组装请求参数 由子类实现
+	 *
+	 * @param billDate 帐单日期
+	 * @return 参数信息集合 key:支付方式 value:支付方式对应的帐户参数
+	 */
+	protected abstract EnumMap<PayType, Map<String, String>> assembleReqUrlParams(String billDate);
+
+	/**
+	 * 拉取帐单
+	 *
+	 * @param post     HttpPost 对象
+	 * @param billDate 帐单日期
+	 */
+	protected void doRequest(HttpPost post, String billDate) {
+		CloseableHttpClient client = HttpClients.custom().build();
+		CloseableHttpResponse response = null;
+		try {
+			response = client.execute(post);
+			if (response.getStatusLine().getStatusCode() == 200) {
+				writeFile(billDir, billDate, EntityUtils.toString(response.getEntity(), Charset.forName("UTF-8")).replaceAll("`", ""));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			if (response != null) {
+				try {
+					response.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+			if (client != null) {
+				try {
+					client.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+			}
+		}
+	}
+
+	/**
+	 * 写帐单内容到本地
+	 *
+	 * @param billDir  帐单本地存放目录
+	 * @param billName 帐单名称
+	 * @param data     帐单内容
+	 */
+	protected void writeFile(String billDir, String billName, String data) {
+		if (!Files.exists(Paths.get(billDir, billName))) {
+			try {
+				try {
+					FileUtils.touch(Paths.get(billDir, billName + ".txt").toFile());
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+				FileUtils.write(Paths.get(billDir, billName + ".txt").toFile(), data, Charset.forName("UTF-8"));
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+
+	/**
+	 * 初始化帐单日期
+	 */
+	private void initBillDates() {
+		Calendar calendar = Calendar.getInstance();
+		calendar.set(Calendar.MONTH, currentMonth - 1);
+		int totalDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
+		for (int i = 1; i <= totalDays; i++) {
+			calendar.set(Calendar.DAY_OF_MONTH, i);
+			billDates.add(dateFormat.format(calendar));
+		}
+	}
+}

src/main/java/cn/gq/financial/bills/PayType.java

+package cn.gq.financial.bills;
+
+import com.google.common.base.Joiner;
+
+import java.io.File;
+
+/**
+ * Created with IntelliJ IDEA
+ * User: zhiyong.fan
+ * Date: 2016/10/11
+ * Time: 11:53
+ * Desc: 支付方式枚举类
+ */
+public enum PayType {
+
+	WeiChat_Xjd("微信", "微信-现金贷账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("weichat", "xjd");
+		}
+	},
+	WeiChat_BaiTiao("微信", "微信-白条账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("weichat", "baitiao");
+		}
+	},
+	UMPay_Xjd("联动", "联动-现金贷账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("umpay", "xjd");
+		}
+	},
+	UMPay_BaiTiao("联动", "联动-白条账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("umpay", "baitiao");
+		}
+	},
+	YeePay_Xjd("易宝", "易宝-现金贷账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("yeepay", "xjd");
+		}
+	},
+	YeePay_BaiTiao("易宝", "易宝-白条账户") {
+		@Override
+		public String path() {
+			return Joiner.on(File.separator).join("yeepay", "baitiao");
+		}
+	};
+
+	/**
+	 * 支付渠道名称
+	 */
+	private String channelName;
+	/**
+	 * 支付渠道帐户
+	 */
+	private String channelAccount;
+
+	/**
+	 * 指定每类帐单在本地存放路径
+	 *
+	 * @return 帐单在本地的存放路径
+	 */
+	public abstract String path();
+
+	PayType(String channelName, String channelAccount) {
+		this.channelName = channelName;
+		this.channelAccount = channelAccount;
+	}
+
+	public String getChannelName() {
+		return channelName;
+	}
+
+	public void setChannelName(String channelName) {
+		this.channelName = channelName;
+	}
+
+	public String getChannelAccount() {
+		return channelAccount;
+	}
+
+	public void setChannelAccount(String channelAccount) {
+		this.channelAccount = channelAccount;
+	}
+}

src/main/java/cn/gq/financial/bills/UMPayBills.java

+package cn.gq.financial.bills;
+
+import com.google.common.base.Joiner;
+import com.google.common.collect.Maps;
+
+import java.security.KeyFactory;
+import java.security.PrivateKey;
+import java.security.Signature;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.util.Base64;
+import java.util.EnumMap;
+import java.util.Map;
+
+/**
+ * Created with IntelliJ IDEA
+ * User: zhiyong.fan
+ * Date: 2016/10/11
+ * Time: 10:29
+ * Desc: 联动优势帐单
+ */
+public class UMPayBills extends AbstractBills {
+
+	/**
+	 * 联运优势帐单摘取接口地址
+	 */
+	protected static final String UMPAY_BILLS_URS = "http://pay.soopay.net/spay/pay/payservice.do";
+
+	public UMPayBills(int currentMonth, String billDir) {
+		super(currentMonth, billDir, UMPAY_BILLS_URS);
+	}
+
+	@Override
+	public EnumMap<PayType, Map<String, String>> assembleReqUrlParams(String billDate) {
+		// 联动优势现金贷账户接口请求参数
+		String umPayXjdPrivateKey = "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";
+		Map<String, String> umPayXjdInfo = Maps.newLinkedHashMap();
+		umPayXjdInfo.put("service", "download_settle_file");
+		umPayXjdInfo.put("version", "4.0");
+		umPayXjdInfo.put("mer_id", "3812");
+		umPayXjdInfo.put("settle_date", billDate);
+		umPayXjdInfo.put("sign_type", "RSA");
+		umPayXjdInfo.put("sign", sign(Joiner.on("&").join(umPayXjdInfo.entrySet()), Base64.getDecoder().decode(umPayXjdPrivateKey)));
+		// 联动优势白条账户接口请求参数
+		String umPayBaitiaoPrivateKey = "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";
+		Map<String, String> umPayBaitiaoInfo = Maps.newLinkedHashMap();
+		umPayBaitiaoInfo.put("service", "download_settle_file");
+		umPayBaitiaoInfo.put("version", "4.0");
+		umPayBaitiaoInfo.put("mer_id", "3661");
+		umPayBaitiaoInfo.put("settle_date", billDate);
+		umPayBaitiaoInfo.put("sign_type", "RSA");
+		umPayBaitiaoInfo.put("sign", sign(Joiner.on("&").join(umPayXjdInfo.entrySet()), Base64.getDecoder().decode(umPayBaitiaoPrivateKey)));
+
+		EnumMap<PayType, Map<String, String>> umPayInfo = Maps.newEnumMap(PayType.class);
+		umPayInfo.put(PayType.UMPay_Xjd, umPayXjdInfo);
+		umPayInfo.put(PayType.UMPay_BaiTiao, umPayBaitiaoInfo);
+		return umPayInfo;
+	}
+
+	/**
+	 * 加密明文
+	 *
+	 * @param plainText  明文内容
+	 * @param privateKey 私钥
+	 * @return 密文数据
+	 */
+	private String sign(String plainText, byte[] privateKey) {
+		String signedStr = "";
+		PKCS8EncodedKeySpec peks = new PKCS8EncodedKeySpec(privateKey);
+		try {
+			KeyFactory kf = KeyFactory.getInstance("RSA");
+			PrivateKey pk = kf.generatePrivate(peks);
+			Signature signature = Signature.getInstance("SHA1withRSA");
+			signature.initSign(pk);
+			signature.update(plainText.getBytes("GBK"));
+			byte[] signedData = signature.sign();
+			signedStr = Base64.getEncoder().encodeToString(signedData);
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return signedStr;
+	}
+}

src/main/java/cn/gq/financial/bills/WeichatBills.java

+package cn.gq.financial.bills;
+
+import com.google.common.collect.Maps;
+
+import java.util.EnumMap;
+import java.util.Map;
+
+/**
+ * Created with IntelliJ IDEA
+ * User: zhiyong.fan
+ * Date: 2016/10/11
+ * Time: 10:28
+ * Desc: 微信帐单
+ */
+public class WeichatBills extends AbstractBills {
+
+	/**
+	 * 微信帐单拉取接口地址
+	 */
+	protected static final String WEICHAT_BILLS_URL = "https://api.mch.weixin.qq.com/pay/downloadbill";
+
+	public WeichatBills(int currentMonth, String billDir) {
+		super(currentMonth, billDir, WEICHAT_BILLS_URL);
+	}
+
+	@Override
+	public EnumMap<PayType, Map<String, String>> assembleReqUrlParams(String billDate) {
+		// 微信现金贷帐户接口请求参数
+		Map<String, String> weiChatXjdInfo = Maps.newLinkedHashMap();
+		weiChatXjdInfo.put("appid", "wx7bf214ccdcbd2e16");
+		weiChatXjdInfo.put("bill_date", billDate);
+		weiChatXjdInfo.put("bill_type", "ALL");
+		weiChatXjdInfo.put("mch_id", "1369557602");
+		weiChatXjdInfo.put("nonce_str", "D51B6C086BAC6BDD612954A2608A3DB7");
+		weiChatXjdInfo.put("key", "D51B6C086BAC6BDD612954A2608A3DB7");
+		// 微信白条帐户接口请求参数
+		Map<String, String> weiChatBaitiaoInfo = Maps.newLinkedHashMap();
+		weiChatBaitiaoInfo.put("appid", "wx7bf214ccdcbd2e16");
+		weiChatBaitiaoInfo.put("bill_date", billDate);
+		weiChatBaitiaoInfo.put("bill_type", "ALL");
+		weiChatBaitiaoInfo.put("mch_id", "1369983002");
+		weiChatBaitiaoInfo.put("nonce_str", "53E9BC685BF2CE47D4C064D3737F890B");
+		weiChatBaitiaoInfo.put("key", "53E9BC685BF2CE47D4C064D3737F890B");
+
+		EnumMap<PayType, Map<String, String>> weiChatInfo = Maps.newEnumMap(PayType.class);
+		weiChatInfo.put(PayType.WeiChat_Xjd, weiChatXjdInfo);
+		weiChatInfo.put(PayType.WeiChat_BaiTiao, weiChatBaitiaoInfo);
+		return weiChatInfo;
+	}
+}

src/main/java/cn/gq/financial/utils/MD5Utils.java

+package cn.gq.financial.utils;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Created with IntelliJ IDEA
+ * User: zhiyong.fan
+ * Date: 2016/10/11
+ * Time: 22:16
+ * Desc: ${DESC}
+ */
+public class MD5Utils {
+
+	public static String build(String content) {
+		MessageDigest messageDigest = null;
+		try {
+			messageDigest = MessageDigest.getInstance("md5");
+		} catch (NoSuchAlgorithmException e) {
+			e.printStackTrace();
+			return null;
+		}
+		messageDigest.update(content.getBytes());
+		byte[] domain = messageDigest.digest();
+		StringBuffer md5StrBuff = new StringBuffer();
+		// converting domain to String
+		for (int i = 0; i < domain.length; i++) {
+			if (Integer.toHexString(0xFF & domain[i]).length() == 1) {
+				md5StrBuff.append("0").append(Integer.toHexString(0xFF & domain[i]));
+			} else
+				md5StrBuff.append(Integer.toHexString(0xFF & domain[i]));
+		}
+		return md5StrBuff.toString();
+	}
+}