废话不多说 直接上代码

    1 引用依赖jar maven

   <dependency>
    <groupId>com.github.binarywang</groupId>
    <artifactId>weixin-java-pay</artifactId>

    <version>2.6.0</version>

    </dependency>

package com.sumainfor.common.constant;


import java.io.FileInputStream;
import java.net.InetAddress;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.UUID;


import javax.net.ssl.SSLContext;


import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
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.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;


public final class Weixin {


//首先第一步设置微信的参数
public static Map<String, String> transfer(String openid, int amount)throws Exception {
InetAddress ia = InetAddress.getLocalHost();

String ip = ia.getHostAddress(); // 获取本机IP地址

String uuid = UUID.randomUUID().toString().toUpperCase().replaceAll("-", "");// 随机获取UUID

String appid = "xxxxxxxxx";// 微信分配的公众账号ID（企业号corpid即为此appId）

String mchid = "xxxxxxxx";// 微信支付分配的商户号

String desc="xx平台提现";// 企业付款操作说明信息。必填

String partner_trade_no=new SimpleDateFormat("yyyyMMddHHmmssSSS") .format(new Date() );

Map<String, String> map = new HashMap<String, String>(); // 定义一个返回MAP

String url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";

SortedMap<Object, Object> signParams = new TreeMap<Object, Object>();

signParams.put("mch_appid",appid); // 微信分配的公众账号ID（企业号corpid即为此appId）

signParams.put("mchid", mchid);// 微信支付分配的商户号

signParams.put("nonce_str",uuid); // 随机字符串，不长于32位

signParams.put("partner_trade_no",partner_trade_no); // 商户订单号，需保持唯一性

signParams.put("openid", openid); // 商户appid下，某用户的openid
// NO_CHECK：不校验真实姓名// FORCE_CHECK：强校验真实姓名（未实名认证的用户会校验失败，无法转账// OPTION_CHECK：针对已实名认证的用户才校验真实姓名（未实名认证用户不校验，可以转账成功）
signParams.put("check_name", "NO_CHECK"); 

signParams.put("amount", amount); // 企业付款金额，单位为分

signParams.put("desc", desc); // 企业付款操作说明信息。必填。

signParams.put("spbill_create_ip", ip); // 调用接口的机器Ip地址


// 生成支付签名，要采用URLENCODER的原始值进行MD5算法！
String sign = "";
sign = createSign("UTF-8", signParams);
String data = "<xml><mch_appid>";
data += appid + "</mch_appid><mchid>"; // APPID
data += mchid + "</mchid><nonce_str>"; // 商户ID
data += uuid + "</nonce_str><partner_trade_no>"; // 随机字符串
data += partner_trade_no + "</partner_trade_no><openid>"; // 订单号
data += openid + "</openid><check_name>NO_CHECK</check_name><amount>"; // 是否强制实名验证
data += amount + "</amount><desc>"; // 企业付款金额，单位为分
data += desc + "</desc><spbill_create_ip>"; // 企业付款操作说明信息。必填。
data += ip + "</spbill_create_ip><sign>";// 调用接口的机器Ip地址
data += sign + "</sign></xml>";// 签名
// 获取证书，发送POST请求；
KeyStore keyStore = KeyStore.getInstance("PKCS12");

//FileInputStream instream = new FileInputStream("/usr/local/wechat/secretKey/apiclient_cert.p12"); // 从配置文件里读取证书的路径信息
FileInputStream instream = new FileInputStream("E:/apiclient_cert.p12"); // 从配置文件里读取证书的路径信息
keyStore.load(instream, mchid.toCharArray());// 证书密码是商户ID
instream.close();
SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, mchid.toCharArray()).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
HttpPost httpost = new HttpPost(url); //
httpost.addHeader("Connection", "keep-alive");
httpost.addHeader("Accept", "*/*");
httpost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
httpost.addHeader("Host", "api.mch.weixin.qq.com");
httpost.addHeader("X-Requested-With", "XMLHttpRequest");
httpost.addHeader("Cache-Control", "max-age=0");
httpost.addHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) ");
httpost.setEntity(new StringEntity(data, "UTF-8"));
CloseableHttpResponse response = httpclient.execute(httpost);
HttpEntity entity = response.getEntity();


String jsonStr = EntityUtils.toString(response.getEntity(), "UTF-8");
EntityUtils.consume(entity);
// 把返回的字符串解释成DOM节点
Document dom = DocumentHelper.parseText(jsonStr);
Element root = dom.getRootElement();
String returnCode = root.element("result_code").getText(); // 获取返回代码
if (StringUtils.equals(returnCode, "SUCCESS")) { // 判断返回码为成功还是失败
String payment_no = root.element("payment_no").getText(); // 获取支付流水号
String payment_time = root.element("payment_time").getText(); // 获取支付时间
map.put("state", returnCode);
map.put("payment_no", payment_no);
map.put("payment_time", payment_time);
return map;
} else {
String err_code = root.element("err_code").getText(); // 获取错误代码
String err_code_des = root.element("err_code_des").getText();// 获取错误描述
map.put("state", returnCode);// state
map.put("err_code", err_code);// err_code
map.put("err_code_des", err_code_des);// err_code_des
return map;
}

}
/**
* sign签名
* @return
*/
private static String createSign(String characterEncoding, SortedMap<Object, Object> parameters) {
StringBuffer sb = new StringBuffer();
Set<Entry<Object, Object>> es = parameters.entrySet();
Iterator<Entry<Object, Object>> it = es.iterator();
while (it.hasNext()) {
Entry<Object, Object> entry = it.next();
String k = (String) entry.getKey();
Object v = entry.getValue();
if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
sb.append(k + "=" + v + "&");
}
}
sb.append("key=" + "2ba86418eee57d592c5b956c43878466");//注：key为商户平台设置的密钥key
String sign = MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}




// MD5Util工具类中相关的方法


private static String byteArrayToHexString(byte b[]) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++)
resultSb.append(byteToHexString(b[i]));


return resultSb.toString();
}


private static String byteToHexString(byte b) {
int n = b;
if (n < 0)
n += 256;
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}


private static String MD5Encode(String origin, String charsetname) {
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
if (charsetname == null || "".equals(charsetname))
resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
else
resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
} catch (Exception exception) {
}
return resultString;
}


private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };



public static void main(String[] args) throws Exception {
// String openid = "ogzBj04dp92676YDNR51xGNTbA-c";//这是openID,
// int amount = 100;  //最低付款金额为100分。付款金额以分为单位
// Map<String, String> map = transfer(openid, amount);
// if (StringUtils.equals(map.get("state"), "SUCCESS")) {
// System.out.println(map.get("payment_no"));
// System.out.println(map.get("payment_time"));
// } else {
// System.out.println(map.get("err_code"));
// System.out.println(map.get("err_code_des"));
// }
}
}