如何用JSP实现用支付宝支付?
1、本文使用的接口地址和参数为沙箱的地址，无论你在使用沙箱或者正式地址，务必核实使用接口地址和参数，不要想当然。
2、本文使用JAR包：
alipay-sdk-java20160912220103.jarcommons-codec-1.6.jarcommons-httpclient-3.0.1.jarcommons-logging-1.1.1.jarfastjson-1.2.7.jarjson-lib-2.2.3-jdk13.jarjson.jarjsp-api.jarservlet-api.jar
说明：
alipay-sdk-java 是官方支付SDK，请到官方下载，本文使用版本20160912
3、首页调用：
<body>
<%
CsPay pay=new CsPay();
pay.doPost(request, response);
%>
</body>
4、package com.luozhuang.alipay;
import java.util.HashMap;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.StringUtils;
import com.alipay.api.request.AlipayTradeCancelRequest;
import com.alipay.api.request.AlipayTradePayRequest;
import com.alipay.api.request.AlipayTradePrecreateRequest;
import com.alipay.api.request.AlipayTradeQueryRequest;
import com.alipay.api.request.AlipayTradeRefundRequest;
import com.alipay.api.request.AlipayTradeWapPayRequest;
import com.alipay.api.response.AlipayTradeCancelResponse;
import com.alipay.api.response.AlipayTradePayResponse;
import com.alipay.api.response.AlipayTradePrecreateResponse;
import com.alipay.api.response.AlipayTradeQueryResponse;
import com.alipay.api.response.AlipayTradeRefundResponse;
public class AlipayClientFactory {
private static final AlipayClient client = new DefaultAlipayClient(
Config.URL, Config.APPID, Config.RSA_RRIVATE_KEY, Config.FORMAT,
Config.CHARSET, Config.ALIPAY_PUBLIC_KEY);
public static AlipayClient getAlipayClientInstance() {
return client;
}
/**
* appAuthToken
* 如ISV代替商家调用当面付接口，需将商户授权后获取的app_auth_token带上；如商家申请当面付自己调用，则传null bizContent
* JSON格式 商户的请求参数
*/
// 手机网页支付 网站支付
public String ydAndPc_Pay(Map<String, String> maps)
throws AlipayApiException {
AlipayTradeWapPayRequest alipayRequest = new AlipayTradeWapPayRequest();
String NotifyUrl = maps.get("NotifyUrl");
String ReturnUrl = maps.get("ReturnUrl");
// 后台回调
if (!StringUtils.isEmpty(NotifyUrl)) {
alipayRequest.setNotifyUrl(NotifyUrl);
// bizContent 中不需要 公共参数
maps.remove("NotifyUrl");
}
// 页面回调
if (!StringUtils.isEmpty(ReturnUrl)) {
alipayRequest.setReturnUrl(ReturnUrl);
// bizContent 中不需要 公共参数
maps.remove("ReturnUrl");
}
String bizCon = JSON.toJSONString(maps);
alipayRequest.setBizContent(bizCon);
String form = "";
try {
form = AlipayClientFactory.getAlipayClientInstance()
.pageExecute(alipayRequest).getBody();
} catch (AlipayApiException e) {
form = "err";
e.printStackTrace();
} // 调用SDK生成表单
return form;
}
// 查询订单状态
public AlipayTradeQueryResponse query(String appAuthToken, String bizContent)
throws AlipayApiException {
AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
request.putOtherTextParam("app_auth_token", appAuthToken);
request.setBizContent(bizContent);
return AlipayClientFactory.getAlipayClientInstance().execute(request);
}
// 条码支付
public AlipayTradePayResponse pay(String appAuthToken, String bizContent)
throws AlipayApiException {
AlipayTradePayRequest request = new AlipayTradePayRequest();
request.putOtherTextParam("app_auth_token", appAuthToken);
request.setBizContent(bizContent);
return AlipayClientFactory.getAlipayClientInstance().execute(request);
}
// 扫码支付
public AlipayTradePrecreateResponse precreate(String appAuthToken,
String bizContent) throws AlipayApiException {
AlipayTradePrecreateRequest request = new AlipayTradePrecreateRequest();
request.putOtherTextParam("app_auth_token", appAuthToken);
request.setBizContent(bizContent);
return AlipayClientFactory.getAlipayClientInstance().execute(request);
}
// 订单撤销
public AlipayTradeCancelResponse cancel(String appAuthToken,
String bizContent) throws AlipayApiException {
AlipayTradeCancelRequest request = new AlipayTradeCancelRequest();
request.putOtherTextParam("app_auth_token", appAuthToken);
request.setBizContent(bizContent);
return AlipayClientFactory.getAlipayClientInstance().execute(request);
}
// 申请退款
public AlipayTradeRefundResponse refund(String appAuthToken,
String bizContent) throws AlipayApiException {
AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
request.putOtherTextParam("app_auth_token", appAuthToken);
request.setBizContent(bizContent);
return AlipayClientFactory.getAlipayClientInstance().execute(request);
}
@SuppressWarnings("unused")
public static void main(String[] args) {
AlipayClientFactory c = new AlipayClientFactory();
try {
Map<String, String> map = new HashMap<String, String>();
map.put("out_trade_no", "20160914113218");
String bizContent = JSON.toJSONString(map);
System.err.println(bizContent);
AlipayTradeQueryResponse rp = c.query(null, bizContent);
} catch (AlipayApiException e) {
e.printStackTrace();
}
}
}
5、package com.luozhuang.alipay;
public class Config {
// 开发者应用私钥。java配置PKCS8格式，PHP/.Net语言配置rsa_private_key.pem文件中原始私钥。
public static final String RSA_RRIVATE_KEY ="luozhuang";
// 接口请求网关。当面付支付、查询、退款、撤销接口中为固定值
public static final String URL = "https://openapi.alipaydev.com/gateway.do";
// 商户应用APPID，只要您的应用中包含当面付接口且是开通状态，就可以用此应用对应的appid。开发者可登录开放平台-管理中心-对应应用中查看
public static final String APPID = "luozhuang";
// 编码字符集。默认 utf-8
public static final String CHARSET = "utf-8";
// 返回格式。默认json
public static final String FORMAT = "json";
// 支付宝公钥，用于获取同步返回信息后进行验证，验证是否是支付宝发送的信息。
public static final String ALIPAY_PUBLIC_KEY = "luozhuang";
}
6、package com.luozhuang.alipay;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.alipay.api.AlipayApiException;
/**
* Servlet implementation class CsPay
*/
public class CsPay extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
public void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// 参数目前都是 写死的 根据业务需求 写活
Map<String, String> maps = new HashMap<String, String>();
maps.put("out_trade_no", UtilDate.getOrderNum());
maps.put("total_amount", "0.01");
maps.put("subject", "Iphone6 16G");
maps.put("body", "Iphone6 16G");
maps.put("product_code", "QUICK_WAP_PAY");
// 下面两个 参数的 KEY 不要乱写 要和工具类里面对应
maps.put("ReturnUrl", "http://domain.com/CallBack/return_url.jsp");
maps.put("NotifyUrl", "http://domain.com/CallBack/notify_url.jsp");
try {
AlipayClientFactory ali = new AlipayClientFactory();
String form = ali.ydAndPc_Pay(maps);
if (!form.equals("err")) {
response.setContentType("text/html;charset=utf-8");
response.getWriter().write(form);// 直接将完整的表单html输出到页面
response.getWriter().flush();
}
} catch (AlipayApiException e) {
e.printStackTrace();
}
}
}
7、package com.luozhuang.alipay;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
public class CsUtil {
/**
* 把数组所有元素排序，并按照“参数=参数值”的模式用“&”字符拼接成字符串
*
* @param params
* 需要排序并参与字符拼接的参数组
* @return 拼接后字符串
*/
public static String createLinkString(Map<String, String> params) {
List<String> keys = new ArrayList<String>(params.keySet());
Collections.sort(keys);
String prestr = "";
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);
if (i == keys.size() - 1) {// 拼接时，不包括最后一个&字符
prestr = prestr + key + "=" + value;
} else {
prestr = prestr + key + "=" + value + "&";
}
}
return prestr;
}
}
8、package com.luozhuang.alipay;
import java.util.Date;
import java.util.Random;
import java.text.SimpleDateFormat;
import java.text.DateFormat;
/* *
*类名：UtilDate
*功能：自定义订单类
*详细：工具类，可以用作获取系统日期、订单编号等
*版本：3.3
*日期：2012-08-17
*说明：
*以下代码只是为了方便商户测试而提供的样例代码，商户可以根据自己网站的需要，按照技术文档编写,并非一定要使用该代码。
*该代码仅供学习和研究支付宝接口使用，只是提供一个参考。
*/
public class UtilDate {
/** 年月日时分秒(无下划线) yyyyMMddHHmmss */
public static final String dtLong = "yyyyMMddHHmmss";
/** 完整时间 yyyy-MM-dd HH:mm:ss */
public static final String simple = "yyyy-MM-dd HH:mm:ss";
/** 年月日(无下划线) yyyyMMdd */
public static final String dtShort = "yyyyMMdd";
/**
* 返回系统当前时间(精确到毫秒),作为一个唯一的订单编号
* @return
* 以yyyyMMddHHmmss为格式的当前系统时间
*/
public static String getOrderNum(){
Date date=new Date();
DateFormat df=new SimpleDateFormat(dtLong);
return df.format(date);
}
/**
* 获取系统当前日期(精确到毫秒)，格式：yyyy-MM-dd HH:mm:ss
* @return
*/
public static String getDateFormatter(){
Date date=new Date();
DateFormat df=new SimpleDateFormat(simple);
return df.format(date);
}
/**
* 获取系统当期年月日(精确到天)，格式：yyyyMMdd
* @return
*/
public static String getDate(){
Date date=new Date();
DateFormat df=new SimpleDateFormat(dtShort);
return df.format(date);
}
/**
* 产生随机的三位数
* @return
*/
public static String getThree(){
Random rad=new Random();
return rad.nextInt(1000)+"";
}
}