Java 后端微信支付demo

1 packagecom.ieou.demo.common;
2 
3 
4 importcom.github.wxpay.sdk.WXPayConfig;
5 importorg.apache.commons.io.IOUtils;
6 
7 importjava.io.ByteArrayInputStream;
8 importjava.io.InputStream;
9 
10 /**配置我们自己的信息  */
11 
12 public class OurWxPayConfig implementsWXPayConfig {
13 
14     /**加载证书  这里证书需要到微信商户平台进行下载*/
15     private byte[] certData;
16 
17     public OurWxPayConfig() throwsException{
18         InputStream certStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("cert/wxpay/apiclient_cert.p12");
19         this.certData =IOUtils.toByteArray(certStream);
20 certStream.close();
21 }
22 
23     /**设置我们自己的appid
24 * 商户号
25 * 秘钥
26 * */
27 
28 @Override
29     publicString getAppID() {
30         return "wx7494893843843c";
31 }
32 
33 @Override
34     publicString getMchID() {
35         return "4672984344";
36 }
37 
38 @Override
39     publicString getKey() {
40         return "qbH5l4N3468798dfgK";
41 }
42 
43 @Override
44     publicInputStream getCertStream() {
45         return new ByteArrayInputStream(this.certData);
46 }
47 
48 @Override
49     public intgetHttpConnectTimeoutMs() {
50         return 0;
51 }
52 
53 @Override
54     public intgetHttpReadTimeoutMs() {
55         return 0;
56 }
57 }

packagecom.ieou.demo.common;
importjava.math.BigDecimal;
public classWxpayParam {
    /**微信支付的金额是String类型 并且是以分为单位
     * 下面举个例子单位是元是怎么转为分的
     * */
    BigDecimal totalPrice  = new BigDecimal(1); //此时的单位是元
    private String body = "xxx等商品信息";
    private String totalFee = totalPrice.multiply(new BigDecimal(100)).toBigInteger().toString();
    /**随机数字字符串*/
    private String outTradeNo = "4784984230432842944";
    publicString getBody() {
        returnbody;
    }
    public voidsetBody(String body) {
        this.body =body;
    }
    publicString getTotalFee() {
        returntotalFee;
    }
    public voidsetTotalFee(String totalFee) {
        this.totalFee =totalFee;
    }
    publicString getOutTradeNo() {
        returnoutTradeNo;
    }
    public voidsetOutTradeNo(String outTradeNo) {
        this.outTradeNo =outTradeNo;
    }
}

1 packagecom.ieou.demo.controller;
2 
3 importcom.github.wxpay.sdk.WXPay;
4 importcom.github.wxpay.sdk.WXPayUtil;
5 importcom.ieou.demo.common.OurWxPayConfig;
6 importcom.ieou.demo.common.WxpayParam;
7 importorg.springframework.web.bind.annotation.GetMapping;
8 importorg.springframework.web.bind.annotation.RequestMapping;
9 importorg.springframework.web.bind.annotation.RestController;
10 
11 importjava.util.HashMap;
12 importjava.util.Map;
13 
14 
15 @RestController
16 @RequestMapping("/")
17 public classWxPayController {
18 
19     @GetMapping("/pay")
20     public Map<String,String> wxPayFunction() throwsException{
21 
22         WxpayParam wxpayParam = newWxpayParam();
23         String notifyUrl = "www.baidu.com";  //我这里的回调地址是随便写的，到时候需要换成处理业务的回调接口
24 
25         OurWxPayConfig ourWxPayConfig = newOurWxPayConfig();
26         WXPay wxPay = newWXPay(ourWxPayConfig);
27 
28         //根据微信支付api来设置
29         Map<String,String> data = new HashMap<>();
30         data.put("appid",ourWxPayConfig.getAppID());
31         data.put("mch_id",ourWxPayConfig.getMchID());         //商户号
32         data.put("trade_type","APP");                         //支付场景 APP 微信app支付 JSAPI 公众号支付  NATIVE 扫码支付
33         data.put("notify_url",notifyUrl);                     //回调地址
34         data.put("spbill_create_ip","127.0.0.1");             //终端ip
35         data.put("total_fee",wxpayParam.getTotalFee());       //订单总金额
36         data.put("fee_type","CNY");                           //默认人民币
37         data.put("out_trade_no",wxpayParam.getOutTradeNo());   //交易号
38         data.put("body",wxpayParam.getBody());
39         data.put("nonce_str","bfrhncjkfdkfd");   //随机字符串小于32位
40         String s = WXPayUtil.generateSignature(data, ourWxPayConfig.getKey());  //签名
41         data.put("sign",s);
42         
43         /**wxPay.unifiedOrder 这个方法中调用微信统一下单接口 */
44         Map<String, String> respData =wxPay.unifiedOrder(data); 
45         if (respData.get("return_code").equals("SUCCESS")){
46 
47             //返回给APP端的参数，APP端再调起支付接口
48             Map<String,String> repData = new HashMap<>();
49             repData.put("appid",ourWxPayConfig.getAppID());
50             repData.put("mch_id",ourWxPayConfig.getMchID());
51             repData.put("prepayid",respData.get("prepay_id"));
52             repData.put("package","WXPay");
53             repData.put("noncestr",respData.get("nonce_str"));
54             repData.put("timestamp",String.valueOf(System.currentTimeMillis()/1000));
55             String sign = WXPayUtil.generateSignature(repData,ourWxPayConfig.getKey()); //签名
56             respData.put("sign",sign);
57             respData.put("timestamp",repData.get("timestamp"));
58             respData.put("package","WXPay");
59             returnrespData;
60 }
61         throw new Exception(respData.get("return_msg"));
62 }
63 }