可是针对每个功能都提供了java code的小例子, 只不过这些例子所有放在一个README.md文件里了html
咱们会下载到 WxPayAPI_JAVA_v3.zip 这个包是吧?java
解压缩, 在java-sdk-v3里面git
我直接把这里面的内容贴出来了哦github
---------------------------------------------分割线------------------------------------------------算法
微信支付 Java SDK
------
对[微信支付开发者文档](https://pay.weixin.qq.com/wiki/doc/api/index.html)中给出的API进行了封装。
com.github.wxpay.sdk.WXPay类下提供了对应的方法:
|方法名 | 说明 |
|--------|--------|
|microPay| 刷卡支付 |
|unifiedOrder | 统一下单|
|orderQuery | 查询订单 |
|reverse | 撤销订单 |
|closeOrder|关闭订单|
|refund|申请退款|
|refundQuery|查询退款|
|downloadBill|下载对帐单|
|report|交易保障|
|shortUrl|转换短连接|
|authCodeToOpenid|受权码查询openid|
* 参数为`Map<String, String>`对象,返回类型也是`Map<String, String>`。
* 方法内部会将参数会转换成含有`appid`、`mch_id`、`nonce_str`、`sign\_type`和`sign`的XML;
* 默认使用MD5进行签名;
* 经过HTTPS请求获得返回数据后会对其作必要的处理(例如验证签名,签名错误则抛出异常)。
* 对于downloadBill,不管是否成功都返回Map,且都含有`return_code`和`return_msg`。若成功,其中`return_code`为`SUCCESS`,另外`data`对应对帐单数据。
api
安装maven:微信
<dependency> <groupId>com.github.wxpay</groupId> <artifactId>wxpay-sdk</artifactId> <version>0.0.3</version> </dependency>-----------------------------------------如下为示例----------------------------------------
配置类MyConfig
app
import com.github.wxpay.sdk.WXPayConfig; import java.io.*; public class MyConfig implements WXPayConfig{ private byte[] certData; public MyConfig() throws Exception { String certPath = "/path/to/apiclient_cert.p12"; File file = new File(certPath); InputStream certStream = new FileInputStream(file); this.certData = new byte[(int) file.length()]; certStream.read(this.certData); certStream.close(); } public String getAppID() { return "wx8888888888888888"; } public String getMchID() { return "12888888"; } public String getKey() { return "88888888888888888888888888888888"; } public InputStream getCertStream() { ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData); return certBis; } public int getHttpConnectTimeoutMs() { return 8000; } public int getHttpReadTimeoutMs() { return 10000; } }
统一下单
maven
import com.github.wxpay.sdk.WXPay; import java.util.HashMap; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> data = new HashMap<String, String>(); data.put("body", "腾讯充值中心-QQ会员充值"); data.put("out_trade_no", "2016090910595900000012"); data.put("device_info", ""); data.put("fee_type", "CNY"); data.put("total_fee", "1"); data.put("spbill_create_ip", "123.12.12.123"); data.put("notify_url", "http://www.example.com/wxpay/notify"); data.put("trade_type", "NATIVE"); // 此处指定为扫码支付 data.put("product_id", "12"); try { Map<String, String> resp = wxpay.unifiedOrder(data); System.out.println(resp); } catch (Exception e) { e.printStackTrace(); } } }
订单查询微信支付
import com.github.wxpay.sdk.WXPay; import java.util.HashMap; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> data = new HashMap<String, String>(); data.put("out_trade_no", "2016090910595900000012"); try { Map<String, String> resp = wxpay.orderQuery(data); System.out.println(resp); } catch (Exception e) { e.printStackTrace(); } } }退款查询
import com.github.wxpay.sdk.WXPay; import java.util.HashMap; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> data = new HashMap<String, String>(); data.put("out_trade_no", "2016090910595900000012"); try { Map<String, String> resp = wxpay.refundQuery(data); System.out.println(resp); } catch (Exception e) { e.printStackTrace(); } } }
下载对帐单
import com.github.wxpay.sdk.WXPay; import java.util.HashMap; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> data = new HashMap<String, String>(); data.put("bill_date", "20140603"); data.put("bill_type", "ALL"); try { Map<String, String> resp = wxpay.downloadBill(data); System.out.println(resp); } catch (Exception e) { e.printStackTrace(); } } }
暂时不支持下载压缩格式的对帐单,但可使用该SDK生成请求用的XML数据
import com.github.wxpay.sdk.WXPay; import com.github.wxpay.sdk.WXPayUtil; import java.util.HashMap; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> data = new HashMap<String, String>(); data.put("bill_date", "20140603"); data.put("bill_type", "ALL"); data.put("tar_type", "GZIP"); try { data = wxpay.fillRequestData(data); System.out.println(WXPayUtil.mapToXml(data)); } catch (Exception e) { e.printStackTrace(); } } }
收到支付结果通知时,须要验证签名,能够这样作
import com.github.wxpay.sdk.WXPay; import com.github.wxpay.sdk.WXPayUtil; import java.util.Map; public class WXPayExample { public static void main(String[] args) throws Exception { String notifyData = "...."; // 支付结果通知的xml格式数据 MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config); Map<String, String> notifyMap = WXPayUtil.xmlToMap(notifyData); // 转换成map if (wxpay.isPayResultNotifySignatureValid(notifyMap)) { // 签名正确 // 进行处理。 // 注意特殊状况:订单已经退款,但收到了支付结果成功的通知,不该把商户侧订单状态从退款改为支付成功 } else { // 签名错误,若是数据里没有sign字段,也认为是签名错误 } } }
HTTPS请求默认使用MD5算法签名,若须要使用HMAC-SHA256
import com.github.wxpay.sdk.WXPay; import com.github.wxpay.sdk.WXPayConstants; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config, WXPayConstants.SignType.HMACSHA256); // ...... } }若须要使用sandbox环境
import com.github.wxpay.sdk.WXPay; import com.github.wxpay.sdk.WXPayConstants; public class WXPayExample { public static void main(String[] args) throws Exception { MyConfig config = new MyConfig(); WXPay wxpay = new WXPay(config, WXPayConstants.SignType.MD5, true); // ...... } }
所需的jar包只有一个:wxpay-sdk-0.0.3.jar固然若是你须要看源码和文档的话, 能够再加上下面两个:wxpay-sdk-0.0.3-javadoc.jarwxpay-sdk-0.0.3-sources.jar这3个jar 包都在 java-sdk-v3\target 下面