<dependency>
      <groupId>com.alipay.api</groupId>
      <artifactId>alipay-sdk-java</artifactId>
      <version>20170615110434</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.7</version>
    </dependency>

package com.example.pay.config.pay;

import org.springframework.context.annotation.Configuration;

import java.io.FileWriter;
import java.io.IOException;

/**
 * @author ligen
 * @title: AliPayConfig
 * @projectName demo
 * @description:
 * @date 2019/6/1014:20
 */
@Configuration
public class AliPayConfig {

//↓↓↓↓↓↓↓↓↓↓請在這里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
 //  netapp映射的地址，，，根據(jù)自己的需要修改
  private static String neturl = "http://g5kike.natappfree.cc";

  // 應用ID,您的APPID，收款賬號既是您的APPID對應支付寶賬號 按照我文章圖上的信息填寫
  public static String app_id = "2016092800619078";

  // 商戶私鑰，您的PKCS8格式RSA2私鑰 剛剛生成的私鑰直接復制填寫
  public static String merchant_private_key ="粘貼生成的私鑰";

  // 支付寶公鑰,對應APPID下的支付寶公鑰。 按照我文章圖上的信息填寫支付寶公鑰，別填成商戶公鑰
  public static String alipay_public_key = "粘貼生成的公鑰";
  // 服務器異步通知頁面路徑 需http://格式的完整路徑，不能加?id=123這類自定義參數(shù)，其實就是你的一個支付完成后返回的頁面URL
  public static String notify_url = neturl+"/alipay/notify_url";

  // 頁面跳轉(zhuǎn)同步通知頁面路徑 需http://格式的完整路徑，不能加?id=123這類自定義參數(shù)，其實就是你的一個支付完成后返回的頁面URL
  public static String return_url = neturl+"/alipay/return_url";

  // 簽名方式
  public static String sign_type = "RSA2";

  // 字符編碼格式
  public static String charset = "utf-8";

  // 支付寶網(wǎng)關
  public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";

  // 支付寶網(wǎng)關
  public static String log_path = "C:\\";


//↑↑↑↑↑↑↑↑↑↑請在這里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

  /**
   * 寫日志，方便測試（看網(wǎng)站需求，也可以改成把記錄存入數(shù)據(jù)庫）
   * @param sWord 要寫入日志里的文本內(nèi)容
   */
  public static void logResult(String sWord) {
    FileWriter writer = null;
    try {
      writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");
      writer.write(sWord);
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (writer != null) {
        try {
          writer.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }
}

package com.example.pay.config.pay;

import com.alibaba.fastjson.JSON;
import com.alipay.api.AlipayApiException;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.example.pay.domain.AlipayVo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author ligen
 * @title: AliPayService
 * @projectName demo
 * @description:
 * @date 2019/6/119:11
 */
@Service
public class AliPayService {
  Logger logger = LoggerFactory.getLogger("AliPayService.class");


  @Autowired
  AlipayVo staticVo;

  //  支付服務
  public String aliPay() throws AlipayApiException {

    // 構建支付數(shù)據(jù)信息
    Map<String, String> data = new HashMap<>();
    data.put("subject", staticVo.getSubject()); //訂單標題
    data.put("out_trade_no", new SimpleDateFormat().format(new Date())); //商戶訂單號,64個字符以內(nèi)、可包含字母、數(shù)字、下劃線；需保證在商戶端不重復   //此處模擬訂單號為時間
    data.put("timeout_express", staticVo.getTimout_express()); //該筆訂單允許的最晚付款時間
    data.put("total_amount", staticVo.getTotle_amout()); //訂單總金額，單位為元，精確到小數(shù)點后兩位，取值范圍[0.01,100000000]
    data.put("product_code", "FAST_INSTANT_TRADE_PAY"); //銷售產(chǎn)品碼，商家和支付寶簽約的產(chǎn)品碼，為固定值QUICK_MSECURITY_PAY


    //構建客戶端
    DefaultAlipayClient alipayRsa2Client = new DefaultAlipayClient(
        AliPayConfig.gatewayUrl,
        AliPayConfig.app_id,
        AliPayConfig.merchant_private_key,
        "json",
        AliPayConfig.charset,
        AliPayConfig.alipay_public_key,
        AliPayConfig.sign_type);
//    AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();// APP支付
    AlipayTradePagePayRequest request = new AlipayTradePagePayRequest(); // 網(wǎng)頁支付
//    AlipayTradeWapPayRequest request = new AlipayTradeWapPayRequest(); //移動h5
    request.setNotifyUrl(AliPayConfig.notify_url);
    request.setReturnUrl(AliPayConfig.return_url);
    request.setBizContent(JSON.toJSONString(data));
    logger.info(JSON.toJSONString(data));
    String response = alipayRsa2Client.pageExecute(request).getBody();
    logger.info(response);
    return response;
  }
}

package com.example.pay.controller;

import com.alipay.api.AlipayApiException;
import com.example.pay.config.pay.AliPayService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

/**

@author ligen
@title: PayController
@projectName demo
@description:
@date 2019/6/1013:25
*/
@Api(tags = “支付寶測試”)
@RestController
public class PayController {

Logger logger = LoggerFactory.getLogger("PayController.class");

@Autowired
AliPayService aliPayService;

@ApiOperation("支付接口")
@RequestMapping(value = "alipay/toPay/{amount}", method = RequestMethod.GET)
public String alipay(@PathVariable(value = "amount") Integer amount) throws AlipayApiException {
  return aliPayService.aliPay(amount);
}

@ApiOperation("支付異步通知接口")
@GetMapping("alipay/notify_url")
public String notifyAlipay() {

  logger.info("----notify-----");
  return " a li pay notify ";
}

@ApiOperation("支付完成以后的回調(diào)接口")
@GetMapping("alipay/return_url")
public String returnAlipay() {
  logger.info("----return-----");
  return " a li pay return ";
}
}