java支付宝服务端开发

@RestController  

@RequestMapping("/payment")  

public class PaymentController {  

    // 支付宝重要参数  

    private static String APP_ID = "";  

    private static String APP_PRIVATE_KEY = "";  

    private static String CHARSET = "utf-8";  

    private static String ALIPAY_PUBLIC_KEY = "";  

  

    /** 

     * 对支付宝支付信息进行签名 

     *  

     * @param info 

     *            数据类 

     * @return 

     * @throws AlipayApiException 

     * @throws UnsupportedEncodingException 

     */  

    @PostMapping("/sign")  

    public Object sign(@RequestBody SignInfo info) throws AlipayApiException, UnsupportedEncodingException {  

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  

        String appID = APP_ID;  

        String bizContent = toJson(info.Content);  

        String charset = CHARSET;  

        String method = "alipay.trade.app.pay";  

        String signType = "RSA";  

        String timestamp = sdf.format(new Date());  

        String version = "1.0";  

        String notify_url = "https://pay.ytbapp.com/payment/notify";// 增加支付异步通知回调,记住上下notify_url的位置,全在sign_type之前,很重要,同样放在最后都不行  

        String content = "app_id=" + appID + "&biz_content=" + bizContent + "&charset=" + charset + "&method=" + method  

                + "¬ify_url=" + (notify_url) + "&sign_type=" + signType + "×tamp=" + timestamp + "&version="  

                + version;  

  

        String sign = AlipaySignature.rsaSign(content, APP_PRIVATE_KEY, charset);  

  

        return "{\"Result\": \"app_id=" + encode(appID) + "&biz_content=" + encode(bizContent) + "&charset="  

                + encode(charset) + "&method=" + encode(method) + "¬ify_url=" + encode(notify_url) + "&sign_type="  

                + encode(signType) + "×tamp=" + encode(timestamp) + "&version=" + encode(version) + "&sign="  

                + encode(sign) + "\"}";  

    }  

  

    private String encode(String sign) throws UnsupportedEncodingException {  

        return URLEncoder.encode(sign, "utf-8").replace("+", "%20");  

    }  

  

    private String toJson(BizContent content) {  

        String context = "";  

        context += "{" + "\"timeout_express\":\"" + content.timeout_express + "\"," + "\"seller_id\":\""  

                + content.seller_id + "\"," + "\"product_code\":\"" + content.product_code + "\","  

                + "\"total_amount\":\"" + content.total_amount + "\"," + "\"subject\":\"" + content.subject + "\","  

                + "\"body\":\"" + content.body + "\"," + "\"out_trade_no\":\"" + content.out_trade_no + "\"}";  

  

        return context;  

    }