【微信】微信提现到零钱

1. 微信提现到零钱代码，可直接运行，代码如下：

import java.io.File;
import java.io.FileInputStream;
import java.security.KeyStore;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;

import javax.net.ssl.SSLContext;

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.junit.Test;

import com.github.wxpay.sdk.MD5Util;

/**
 * @ClassName:    [WeiXinCashTest]   
 * @Description:  [微信提现到零钱]   
 * @Author:       [songdx]   
 * @CreateDate:   [2018年11月11日 下午4:32:24]   
 * @Version:      [v1.0]
 */
public class WeiXinCashTest {

	@Test
    public void OldBook(){
        //1.0 封装参数
        String appid = "wx**************";  //微信公众号的appid
        String mch_id = "***********"; //商户号
        String nonce_str = "******************"; //生成随机数
        String partner_trade_no =  "******************"; //生成商户订单号
        String openid = "**********************"; // 支付给用户openid
        String check_name = "NO_CHECK"; //是否验证真实姓名呢
        String re_user_name = "小宋";   //收款用户姓名
        String amount = "100";              //企业付款金额，单位为分
        String desc = "测试开发，稍后会还给公司的";   //企业付款操作说明信息。必填。
        String spbill_create_ip = "127.0.0.1";     //

        //2.0 生成map集合
        SortedMap packageParams = new TreeMap(); 
        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


        //3.0 生成签名
        String sign  = createSign("UTF-8",packageParams,"************************************");

        //4.0 封装退款对象
        packageParams.put("sign", sign);

        //5.0将当前的map结合转化成xml格式
        String reuqestXml = getRequestXml(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

        try {
            String weixinPost = doRefund(wxUrl, reuqestXml).toString();
            
            //7.0 解析返回的xml数据
            //得到解析数据后根据返回内容自行解析下即可
            System.out.println("解析返回的数据:"+weixinPost);
           
           
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
	
	/**
	 * @Description: 封装为xml
	 * @param @param parameters
	 * @param @return   
	 * @return String  
	 * @throws
	 * @author songdx
	 * @date 2018年11月11日
	 */
    public static String getRequestXml(SortedMap parameters){
        StringBuffer sb = new StringBuffer();
        sb.append("");
        Set es = parameters.entrySet();
        Iterator it = es.iterator();
        while(it.hasNext()) {
            Map.Entry entry = (Map.Entry)it.next();
            String k = (String)entry.getKey();
            String v = (String)entry.getValue();
            if ("attach".equalsIgnoreCase(k)||"body".equalsIgnoreCase(k)||"sign".equalsIgnoreCase(k)) {
                sb.append("<"+k+">"+"");
            }else {
                sb.append("<"+k+">"+v+"");
            }
        }
        sb.append("");
        return sb.toString();
    }
    
    /**
     * @Description: 发起退款请求
     * @param @param url
     * @param @param data
     * @param @return
     * @param @throws Exception   
     * @return String  
     * @throws
     * @author songdx
     * @date 2018年11月11日
     */
    public String doRefund(String url,String data) throws Exception { 
    		char[] password = "**********".toCharArray();
		KeyStore keyStore = KeyStore.getInstance("PKCS12"); 
		FileInputStream instream = new FileInputStream(new File("D://apiclient_cert.p12"));//P12文件目录
		try { 
			keyStore.load(instream, password);//这里写密码
		} finally { 
			 instream.close(); 
		} 
		
		SSLContext sslcontext = SSLContexts.custom() 
		.loadKeyMaterial(keyStore, password)//这里也是写密码的 
		.build(); 
		// Allow TLSv1 protocol only 
		SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory( 
		sslcontext, 
		new String[] { "TLSv1" }, 
		null, 
		SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER); 
		CloseableHttpClient httpclient = HttpClients.custom() 
		.setSSLSocketFactory(sslsf) 
		.build(); 
		
		try { 
			HttpPost httpost = new HttpPost(url); // 设置响应头信息 
			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")); 
			System.out.println("请求的内容："+data);
			CloseableHttpResponse response = httpclient.execute(httpost); 
			try { 
				HttpEntity entity = response.getEntity(); 
				String jsonStr = EntityUtils.toString(response.getEntity(), "UTF-8"); 
				System.out.println("微信返回的内容："+jsonStr);
				EntityUtils.consume(entity); 
				return jsonStr; 
			} finally { 
				response.close(); 
			} 
		} finally { 
			httpclient.close(); 
		} 
     } 	
     /**
  	 * 微信支付签名算法sign
  	 * @param characterEncoding
  	 * @param parameters
  	 * @return
  	 */
  	@SuppressWarnings("unchecked")
  	public static String createSign(String characterEncoding,SortedMap parameters,String key){
  		StringBuffer sb = new StringBuffer();
  		Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）
  		Iterator it = es.iterator();
  		while(it.hasNext()) {
  			Map.Entry entry = (Map.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=" + key);
  		 System.out.println("parameters=" + parameters);
  		 System.out.println("key=" + key);
  		 System.out.println("===========================================");
  		String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
  		System.out.println("================sign:"+sign+"=======================");
  		return sign;
  	}
}

注意事项：

 1. 在开发微信提现时也遇到很多坑和注意的地方，比如签名问题，NO_AUTH | 产品权限验证问题
 2. 开通条件：入驻满90天，截止今日往回推30天连续不间断保持有交易（每天可交易一分钱）
 3. 登录微信支付平台，地址：https://pay.weixin.qq.com/index.php
 4. 开通地址需前往【商户平台】->【产品中心】申请开通
 5. 签名错误格式和顺序问题，参照上面签名代码即可（加密形式需要注意下或采用默认）
 6. 提现会从“运营账户”扣款，操作时需要保证账户余额有钱，否则提示余额不足情况