java实现支付宝支付及退款（二）
紧跟上篇博客，本篇将书写具体的代码实现
开发环境：SSM、maven、JDK8.0
1.Maven坐标
<!--阿里支付-->
<dependency>
<groupId>com.alipay.sdk</groupId>
<artifactId>alipay-sdk-java</artifactId>
<version>3.4.49.ALL</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.56</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
2.AliOrderDTO 实体
public class UPOrder {
//get/set自己操作
private String code;//商户订单号
private String orderName;//订单名称
private BigDecimal paymentAmount;//付款金额
private String productDesc;//商品描述
private String createBy;//创建人Code
private Long createTime;//创建时间（时间戳）
private Integer createByType;//创建人类型 1-专家 2-企业用户
private Boolean status;//是否付款 true - 已付 false-未付
private Long payTime;//订单支付时间-支付后才存在 （时间戳）
public String getCode() {
return code;
}
}
3.UPOrder 实体
public class AliOrderDTO {
//get/set自己操作
private String code;//商户订单号
private String aliTransactionNum;//支付宝交易号
private BigDecimal paymentAmount;//退款金额
private String refundCause;//退款原因
private String refundNum;//退款请求号
}
4.配置文件AlipayConfig
public class AlipayConfig {
//↓↓↓↓↓↓↓↓↓↓请在这里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号
public static String APPID = "2016092700611035";
// 商户私钥，您的PKCS8格式RSA2私钥
public static String RSA_PRIVATE_KEY = "MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDP1hzPIGDA7XHmPpSIwvZVBGU1wsVYKactul5v4bJSV3Le0zGhV82GIP0ByX9tNzU+//kaxFgRsdZyPvR28iDbf9IaVZ+n+cZHA2rvevmntzoi3wMSEhfi8gHmY3+FuUALmICcK8a8rNV5qjpzRAyOb0IRLh1OxtCb64caKQivIt6OTEmLvyJ9BFdYbOSxHWpaOd6UMoXzG9gUzoRkMQiv9bGPkbOjxSXvYZXIXMF9OH+aHQ0oB94Od/Y/uc1xav23hPEq7HfaEMdNc3ZeRxC2JRGZm0HEn360hQ5fduE5QHnC0havpecvPNmmJv18KmYPICvK0WEONXQzZkd7ieWZAgMBAAECggEAPCPk6jqgRLNwxgNNz9U6mpdPAiN+H2jOK3lGYnGYvCL55miOb/WMT0e0bpPz/5J+IeDIIGq4YUZom16ENvcRcvKlxWEJdf3c1iezBeE75MAsXnLR3KTHrLACxLv95qAYXEKg1JAGTgplK3OKvlfumjivkXEaofT94GBjE7rT/HlBDUQd7fofu337fkVlzaluL9n6KwPyFoOhEoXz/ESANlcAzFxEdrHJ+41ywfivpCmPYipJ5RlPcvrxYPQVVcID9yxJmYl+yT+5zq+RENQw9UErKwufO27wMmlk8h9qnJ353Q5qzlI1XuziW27e+WcuCKA5KjPQDTW0FQX46+auAQKBgQDsM2A34G4bxF4FrKQMXYK+9AeN7jnOiObVigJWDQJdDmE6ajFJyjywSMJdJHFkt093jq1Q7GbFQratvXnsKw808gBqlUDHruHfQyAjB7Euwo/uj+Rf64wFSYeNyPz5Y4ZzTW/egp0+fNlwdQueF/ZxTix3Kveopju05OdP5LsDKQKBgQDhQhFWfLdhrzsmCbo1+FwI9XLQcijrwkDJcDCwjSw77Utdc7ZB9b47Qw8gPdGHsHUNST2SO0MUolxpcslhK0LCp2JH+jmyLvutCwJHge2ajEHr9UQNwqNT0VjfvLOCsqy1XjcT4UMkVbLuZfQVkuGeQMlZAz7vMwjnLHM5OWYM8QKBgQCx7+YtUfJBEsZt6efPtOZZKgdC4dNEhxe2iHhIERbVuY5/bh5hY2witT1O47RU1k+UVrS0QNMPCboK2rGtu6aCEUlFAdlCVLmt8qiUGyhcfI/nfRjjNdRO61yl8GK7EUHpPM3ox2bj+zPnJxWwbIboRqbywzi9ITXbiZHEOyCzOQKBgERWMMBWMaP27zDI/q7k27b0D5LhLzzmv5Tc7kiBa4v6n0SImCBGlyGPZIVZe7l4dOpE7+LvC5i08OgkpKdP4n7/HLfNV7eQvVVv448iAZ1DM7SLwcuS4s3I0vd9XdAmuHKFVJw5WI8rWI8uavAokT3bVbolW/BhQTAwsfwIR8dhAoGAOnxoALzuKX647N6k8AQEdNGr6CsDfwVR050vJHDbYVAxocGifiNE64/LJyzG0lO3mj4eiVwpikwPMx1oDhPuDURXrLK0TNzBV8LsGQvf+mTDgabAo8Jf/fYY3Ea8NOnE4Zrg6mEC93C0rUHEfsO8g+B2Skvw+8p6M6SHsmNsthw=";
// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
public static String ALIPAY_PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz9YczyBgwO1x5j6UiML2VQRlNcLFWCmnLbpeb+GyUldy3tMxoVfNhiD9Acl/bTc1Pv/5GsRYEbHWcj70dvIg23/SGlWfp/nGRwNq73r5p7c6It8DEhIX4vIB5mN/hblAC5iAnCvGvKzVeao6c0QMjm9CES4dTsbQm+uHGikIryLejkxJi78ifQRXWGzksR1qWjnelDKF8xvYFM6EZDEIr/Wxj5Gzo8Ul72GVyFzBfTh/mh0NKAfeDnf2P7nNcWr9t4TxKux32hDHTXN2XkcQtiURmZtBxJ9+tIUOX3bhOUB5wtIWr6XnLzzZpib9fCpmDyArytFhDjV0M2ZHe4nlmQIDAQAB";
// 服务器异步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
public static String notify_url = "http://d9tc3e.natappfree.cc/alipay/notify_url.jsp";
// 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问，
//标红的域名为内网穿透工具生成的域名，没启动一次穿透工具，生成的域名都不一样，所有启动一次都需要进行修改
public static String return_url = "http://aa7xmz.natappfree.cc/alipay/return_url.jsp";
//请求网关地址
public static String URL="http://aa7xmz.natappfree.cc/gateway.do";
// 签名方式
public static String SIGNTYPE = "RSA2";
// 字符编码格式
public static String CHARSET = "utf-8";
//返回格式
public static String FORMAT="json";
// 支付宝网关
public static String gatewayUrl = "https://openapi.alipay.com/gateway.do";
// 支付宝网关
public static String log_path = "/log";
5.控制层
@Controller
@RequestMapping("/pay/")
public class payCotroller {
/**
*@description: 生成充值余额订单（支付宝充值）
*@author:cyb
*@date: 2019-03-11 10:12
*@param:
*@return: net.sf.json.JSONArray
*/
@RequestMapping("topUpBalance")
public void topUpBalance(UPOrder order, HttpServletResponse response){
//获得初始化的AlipayClient
//参数： URL APPID RSA_PRIVATE_KEY json ALI_CHARSET ALIPAY_PUBLIC_KEY SIGNTYPE
AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.URL, AlipayConfig.APPID, AlipayConfig.RSA_PRIVATE_KEY, "json", AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGNTYPE);
//设置请求参数
AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
alipayRequest.setReturnUrl(GetPayInfo.getProperyByFourthWay("ALI_RETURN_URL"));
alipayRequest.setNotifyUrl(GetPayInfo.getProperyByFourthWay("ALI_NOTIFY_URL"));
//商户订单号，商户网站订单系统中唯一订单号，必填
String out_trade_no = new String(order.getCode());
//付款金额，必填
String total_amount = new String(order.getPaymentAmount().toString());
//订单名称，必填
String subject = new String(order.getOrderName());
//商品描述，可空
String body = new String(order.getProductDesc());
alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
+ "\"total_amount\":\""+ total_amount +"\","
+ "\"subject\":\""+ subject +"\","
+ "\"body\":\""+ body +"\","
+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
//请求
String result;
try {
result = alipayClient.pageExecute(alipayRequest).getBody();
response.setContentType("text/html;charset=utf-8");
response.getWriter().write(result);// 直接将完整的表单html输出到页面
response.getWriter().flush();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
response.setContentType("text/html;charset=utf-8");
try {
response.getWriter().flush();
response.getWriter().write("1");// 直接将完整的表单html输出到页面
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
/**
*@description:支付宝退款
*@author:cyb
*@date: 2019-03-13 10:48
*@param: response
*@param: aliOrderDTO
*@return: void
*/
@RequestMapping("aliRefund")
public void aliRefund(HttpServletResponse response, AliOrderDTO aliOrderDTO){
try {
//获得初始化的AlipayClient
//URL APPID RSA_PRIVATE_KEY JSON CHARSET ALIPAY_PUBLIC_KEY SIGNTYPE
AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.URL, AlipayConfig.APPID, AlipayConfig.RSA_PRIVATE_KEY, "json", AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGNTYPE);
//设置请求参数
AlipayTradeRefundRequest alipayRequest = new AlipayTradeRefundRequest();
//商户订单号，商户网站订单系统中唯一订单号
String out_trade_no = aliOrderDTO.getCode();
//支付宝交易号
String trade_no =aliOrderDTO.getAliTransactionNum();
//请二选一设置
//需要退款的金额，该金额不能大于订单金额，必填
String refund_amount = aliOrderDTO.getPaymentAmount().toString();
//退款的原因说明
String refund_reason = aliOrderDTO.getRefundCause();
//标识一次退款请求，同一笔交易多次退款需要保证唯一，如需部分退款，则此参数必传
String out_request_no = aliOrderDTO.getRefundNum();
alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
+ "\"trade_no\":\""+ trade_no +"\","
+ "\"refund_amount\":\""+ refund_amount +"\","
+ "\"refund_reason\":\""+ refund_reason +"\","
+ "\"out_request_no\":\""+ out_request_no +"\"}");
//请求
String result = alipayClient.execute(alipayRequest).getBody();
response.setContentType("text/html;charset=utf-8");
response.getWriter().write(result);// 直接将完整的表单html输出到页面
response.getWriter().flush();
}catch (Exception e){
e.printStackTrace();
String result="1";
response.setContentType("text/html;charset=utf-8");
try {
response.getWriter().write(result);// 直接将完整的表单html输出到页面
response.getWriter().flush();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
/**
*@description: 异步支付的回调
*@author:cyb
*@date: 2019-03-12 14:24
*@param: request
*@return: void
*/
@RequestMapping("notify_url")
@ResponseBody
public JSONArray notify_url(HttpServletRequest request){
System.out.println("异步回调");
return msg200();
}
/**
*@description:同步的回调方法
*@author:cyb
*@date: 2019-03-12 14:23
*@param: request
*@return: void
*/
@RequestMapping("return_url")
@ResponseBody
public JSONArray return_url(HttpServletRequest request){
System.out.println("同步回调");
return msg200();
}
请求的效果：
1.支付宝支付：将返回的form表单写在一个HTML页面中运行，则会出现对应的支付页面让你进行支付
支付成功后则会有个回调，回调的路径自己定义。
以上博客代码本人都亲测过，需要源码的可以联系本人，以上内容中有所不适的希望指出。另转载请说明出处，本人博客主页为：https://home.cnblogs.com/u/chenyuanbo/ ；
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