如何用struts调用支付宝接口

下面是如何用struts调用支付宝接口的攻略。

1.准备工作

在使用struts调用支付宝接口之前，需要先完成以下准备工作：

1.申请支付宝开发者账号：在支付宝开放平台注册账号，并完成实名认证。

2.创建应用：登录开放平台后，在开发者控制台创建一个应用，并得到应用的APP ID、商户私钥、支付宝公钥等信息。

3.下载支付宝开发包：在[支付宝开放平台](https://opendocs.alipay.com/open/54/103419）下载Java SDK。

4.将SDK导入到项目中：将SDK解压后，将其中的jar包和lib目录中的所有jar包添加到项目的classpath。

2.编写代码

下面是两个示例，分别演示在struts中调用支付宝API完成批量转账和即时到账支付的过程。

批量转账示例

1.编写Action

public class BatchTransfersAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) throws Exception {
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.URL, AlipayConfig.APP_ID, AlipayConfig.APP_PRIVATE_KEY, AlipayConfig.FORMAT, AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGN_TYPE);
        AlipayFundTransToaccountTransferRequest alipayRequest = new AlipayFundTransToaccountTransferRequest();
        alipayRequest.setBizContent("{" +
        "\"out_biz_no\":\"20180901001\"," +
        "\"payee_type\":\"ALIPAY_LOGONID\"," +
        "\"payee_account\":\"[e-mail]\"," +
        "\"amount\":\"100.00\"," +
        "\"payer_show_name\":\"转账支付测试\"," +
        "\"payee_real_name\":\"测试用户\"," +
        "\"remark\":\"转账测试\"" +
        "  }");
        AlipayFundTransToaccountTransferResponse alipayResponse = alipayClient.execute(alipayRequest);
        if(alipayResponse.isSuccess()){
            System.out.println("调用支付宝API成功");
        } else {
            System.out.println("调用支付宝API失败");
        }
        return mapping.findForward("success");
    }
}

2.配置struts.xml

<action name="batchTransfers" class="BatchTransfersAction">
    <result name="success">/batchTransfers.jsp</result>
</action>

3.编写JSP

<a href="${pageContext.request.contextPath}/batchTransfers">批量转账</a>

即时到账支付示例

1.编写Action

public class AlipayAPIAction extends Action {
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response) throws Exception {
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.URL, AlipayConfig.APP_ID, AlipayConfig.APP_PRIVATE_KEY, AlipayConfig.FORMAT, AlipayConfig.CHARSET, AlipayConfig.ALIPAY_PUBLIC_KEY, AlipayConfig.SIGN_TYPE);
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl("http://localhost:8080/ProjectName/success.jsp");
        alipayRequest.setNotifyUrl("http://localhost:8080/ProjectName/notify_url.jsp");
        alipayRequest.setBizContent("{" +
        "\"out_trade_no\":\"20180918064\"," +
        "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"," +
        "\"total_amount\":0.01," +
        "\"subject\":\"测试商品名称\"," +
        "\"body\":\"测试商品描述信息\"" +
        "}");
        String formHtml = alipayClient.pageExecute(alipayRequest).getBody();
        response.setContentType("text/html;charset=" + AlipayConfig.CHARSET);
        response.getWriter().write(formHtml);
        response.getWriter().flush();
        response.getWriter().close();
        return null;
    }
}

2.配置struts.xml

<action name="alipayAPI" class="AlipayAPIAction">
    <result name="success" type="redirect">{redirectUrl}</result>
</action>

3.编写JSP

<a href="${pageContext.request.contextPath}/alipayAPI?redirectUrl=https://openapi.alipay.com/gateway.do">支付宝支付</a>

3.总结

通过以上两个示例，我们可以看到struts调用支付宝API相对简单，只需要创建支付宝SDK的客户端并传入请求参数即可。当然，我们还可以通过访问支付宝开放平台的官方文档，了解更多API的参数和使用方法。