1.添加依赖
<dependency>
<groupId>com.github.wxpay</groupId>
<artifactId>WXPay-SDK-Java</artifactId>
<version>0.0.4</version>
</dependency>
2.配置参数
3.实现方法
@ApiOperation(value = "企业转账到零钱", httpMethod = "POST", produces = "application/json;charset=UTF-8")
@ApiImplicitParams(value = {@ApiImplicitParam(value = "*用户token", name = "token",defaultValue ="", dataType = "String",paramType="header"),
@ApiImplicitParam(value = "金额", name = "money",defaultValue ="", dataType = "String",paramType="query")
})
@PostMapping("/wxpay/transfer")
public Result transfer(HttpServletRequest request,BigDecimal money,String openID) {
// 1.0 拼凑企业支付需要的参数
String appid = APPID; // APP对应的微信的appid
String mch_id = MCHID; // 商户号
String nonce_str = WXPayUtil.generateNonceStr(); // 生成随机数
String partner_trade_no = WXPayUtil.generateNonceStr(); // 生成商户订单号
String openid = openID; // 收款用户openid
String check_name = "NO_CHECK"; // 是否验证真实姓名呢
String re_user_name = "KOLO"; // 收款用户姓名(非必须)
String amount = String.valueOf(money); // 企业付款金额,最少为100,单位为分
String desc = "恭喜你,完成了一个订单!"; // 企业付款操作说明信息。必填。
String spbill_create_ip = IpKit.getIpAddr(request); // 用户的ip地址
// 2.0 生成map集合
SortedMap<String, String> packageParams = new TreeMap<String, String>();
packageParams.put("mch_appid", appid); // 微信公众号的appid
packageParams.put("mchid", mch_id); // 商务号
packageParams.put("nonce_str", nonce_str); // 随机生成后数字,保证安全性
packageParams.put("partner_trade_no", partner_trade_no); // 生成商户订单号
packageParams.put("openid", openid); // 支付给用户openid
packageParams.put("check_name", check_name); // 是否验证真实姓名呢
packageParams.put("re_user_name", re_user_name);// 收款用户姓名
packageParams.put("amount", amount); // 企业付款金额,单位为分
packageParams.put("desc", desc); // 企业付款操作说明信息。必填。
packageParams.put("spbill_create_ip", spbill_create_ip); // 调用接口的机器Ip地址
try {
// 3.0 利用上面的参数,先去生成自己的签名
String sign = WXPayUtil.generateSignature(packageParams, PATERNERKEY);
// 4.0 将签名再放回map中,它也是一个参数
packageParams.put("sign", sign);
// 5.0将当前的map结合转化成xml格式
String xml = WXPayUtil.mapToXml(packageParams);
// 6.0获取需要发送的url地址
String wxUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers"; // 获取退款的api接口
System.out.println("发送前的xml为:" + xml);
// 7,向微信发送请求转账请求
String returnXml = certHttpUtil.postData(wxUrl, xml, MCHID, CERTPATH);
System.out.println("返回的returnXml为:" + returnXml);
// 8,将微信返回的xml结果转成map格式
Map<String, String> returnMap = WXPayUtil.xmlToMap(returnXml);
if (returnMap.get("result_code").equals("SUCCESS")) {
// 付款成功
System.out.println("returnMap为:" + returnMap);
}else {
return Result.error(902,returnMap.get("err_code_des"));
}
return Result.ok(returnMap.toString());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
return Result.error(901,"微信转账失败!");
}
}
4.用到的工具类
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.stereotype.Component;
/**
* 获取微信apiclient_cert.p12证书
*/
@Component
public class CertHttpUtil {
private static int socketTimeout = 10000;// 连接超时时间,默认10秒
private static int connectTimeout = 30000;// 传输超时时间,默认30秒
private static RequestConfig requestConfig;// 请求器的配置
private static CloseableHttpClient httpClient;// HTTP请求器
/**
* 通过Https往API post xml数据
*
* @param url API地址
* @param xmlObj 要提交的XML数据对象
* @param mchId 商户ID
* @param certPath 证书位置
* @return
*/
public String postData(String url, String xmlObj, String mchId, String certPath) {
// 加载证书
try {
initCert(mchId, certPath);
} catch (Exception e) {
e.printStackTrace();
}
String result = null;
HttpPost httpPost = new HttpPost(url);
// 得指明使用UTF-8编码,否则到API服务器XML的中文不能被成功识别
StringEntity postEntity = new StringEntity(xmlObj, "UTF-8");
httpPost.addHeader("Content-Type", "text/xml");
httpPost.setEntity(postEntity);
// 根据默认超时限制初始化requestConfig
requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();
// 设置请求器的配置
httpPost.setConfig(requestConfig);
try {
HttpResponse response = null;
try {
response = httpClient.execute(httpPost);
} catch (IOException e) {
e.printStackTrace();
}
HttpEntity entity = response.getEntity();
try {
result = EntityUtils.toString(entity, "UTF-8");
} catch (IOException e) {
e.printStackTrace();
}
} finally {
httpPost.abort();
}
return result;
}
/**
* 加载证书
*
* @param mchId 商户ID
* @param certPath 证书位置
* @throws Exception
*/
private void initCert(String mchId, String certPath) throws Exception {
// 证书密码,默认为商户ID
String key = mchId;
// 证书的路径
String path = certPath;
// 指定读取证书格式为PKCS12
KeyStore keyStore = KeyStore.getInstance("PKCS12");
// 读取本机存放的PKCS12证书文件
File file = new File(path);
InputStream in = new FileInputStream(file);
try {
// 指定PKCS12的密码(商户ID)
keyStore.load(in, key.toCharArray());
} finally {
in.close();
}
SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, key.toCharArray()).build();
SSLConnectionSocketFactory sslsf =
new SSLConnectionSocketFactory(sslcontext, new String[] {"TLSv1"}, null,
SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
}
}
注意,这个功能的现需要先获取微信授权,授权后获取微信用户的openid才能完成提现,同时该方法适合微信公众号提现和微信小程序提现。