java实现微信退款功能

微信退款之前需要在常量中配置退款地址，退款的地址必须是可以直接访问的。（之前的申请商户平台及在开放平台申请账号不在描述）在调起之前需要下载商户平台上的证书将其放在项目src下。 

微信退款回调url ：微信官方建议在提交退款申请后进行退款回调url配置，便于通知退款的结果。配置在微信商户平台-》交易中心-》退款配置栏进行退款结果回调通知配置。配置的url必须为可以直接访问的类似付款成功回调url。

配置成功后在回调的url中处理退款后的结果。微信给返回的参数如下：

对于加密信息req_info的解密步骤如下。

解密过程中需要先到oracle官网下载对应java版本的sercity包，然后将下载后的包中两个jar复制到jdk/jre/lib/security/包下并覆盖原jar.另外需要在项目中引入一个bcprov-jdk15on-158.jar 

退款部分代码：

// 构造向微信发送参数的实体类
  private Unifiedorder unifiedorder = new Unifiedorder();
  // 微信的参数
  private WeixinConfigUtils config = new WeixinConfigUtils();
  public static final String ALGORITHM = "AES/ECB/PKCS7Padding"; 
  private RefundOrder refundOrder = new RefundOrder();
  @Resource
  private AESDecodeUtil aesDecodeUtil;
@Action("weixinRefund")
  public String weixinRefund() {
    try {
      String out_trade_no = getRequest().getParameter("out_trade_no");
      String refund_fee = getRequest().getParameter("refund_fee");
      aLiPay = aLiPayService.searchALiPayByOutTradeNo(out_trade_no);
      if (aLiPay != null) {
 // 参数组
 String appid = aLiPay.getApp_id();
 String mch_id = config.mch_id;
 String nonce_str = RandCharsUtils.getRandomString(16);
 String out_refund_no = UuIdUtils.getUUID();
 Integer total_fee = aLiPay.getTotalFee();
 // 构造签名
 parameters.put("appid", appid);
 parameters.put("mch_id", mch_id);
 parameters.put("nonce_str", nonce_str);
 parameters.put("out_trade_no", out_trade_no);
 parameters.put("out_refund_no", out_refund_no);
 parameters.put("total_fee", total_fee);
 parameters.put("refund_fee", refund_fee);
 parameters.put("op_user_id", mch_id);
 String sign = WXSignUtils.createSign("UTF-8", parameters);
 // 向微信发送xml消息
 // Unifiedorder unifiedorder = new Unifiedorder();
 unifiedorder.setAppid(appid);
 unifiedorder.setMch_id(mch_id);
 unifiedorder.setSign(sign);
 unifiedorder.setNonce_str(nonce_str);
 unifiedorder.setOut_trade_no(out_trade_no);
 unifiedorder.setOut_refund_no(out_refund_no);
 unifiedorder.setTotal_fee(total_fee);
 unifiedorder.setRefund_fee(Integer.valueOf(refund_fee));
 unifiedorder.setOp_user_id(mch_id);
 String xmlInfo = HttpXmlUtils.refundXml(unifiedorder);
 unifiedorder = null;
 try {
   CloseableHttpResponse response = HttpUtil.Post(
weixinConstant.REFUND_URL, xmlInfo, true);
   // 输出退款后的信息
   String refundXml = EntityUtils.toString(response.getEntity(), "utf-8");
   Map refundOrderMap = HttpXmlUtils.parseRefundXml(refundXml);
   if (refundOrderMap.size()>0) {
     if (refundOrderMap.get("result_code").equals("SUCCESS") && refundOrderMap.get("return_code").equals("SUCCESS")) {
refundOrder.setAppid(refundOrderMap.get("appid"));
refundOrder.setMch_id(refundOrderMap.get("mch_id"));
refundOrder.setTransaction_id(refundOrderMap.get("transaction_id"));
refundOrder.setOut_trade_no(refundOrderMap.get("out_trade_no"));
refundOrder.setOut_refund_no(refundOrderMap.get("out_refund_no"));
refundOrder.setRefund_id(refundOrderMap.get("refund_id"));
refundOrder.setRefund_fee(Integer.valueOf(refundOrderMap.get("refund_fee")));
refundOrder.setTatol_fee(Integer.valueOf(refundOrderMap.get("total_fee")));
refundOrder.setRefund_status(WeixinRefundStatusConstant.APPLY_SUCCESS);
refundOrderService.saveOrder(refundOrder);
      msg.put("stateCode", MsgCode.SUCCESS);
msg.put("message ", "退款申请成功");
    refundOrderService.saveOrder(refundOrder);
     }else {
msg.put("stateCode", MsgCode.ERROR);
msg.put("message ", "退款申请失败");
     }
   }else {
     msg.put("stateCode", MsgCode.ERROR);
     msg.put("message ", "退款申请失败");
   }
   try {
     // 关闭流
     EntityUtils.consume(response.getEntity());
   } finally {
     response.close();
   }
 } catch (Exception e) {
   msg.put("stateCode", MsgCode.SYS_ERROR);
   msg.put("message ", "服务器异常");
 }

      } else {
 msg.put("stateCode", MsgCode.ERROR);
 msg.put("message ", "退款申请失败");
      }
      Struts2Utils.renderJson(JSONObject.toJSonString(msg,
   SerializerFeature.DisableCircularReferenceDetect));
      return NONE;
    } catch (Exception e) {
      log.error(e.getMessage());
      e.printStackTrace();
      return "500";
    }
  }
   

  @Action("refundNotifyUrl")
  public String refundNotifyUrl() throws IOException {
    try {
      Map resultMap = JdomParseXmlUtils.getWeixinResult(
   Struts2Utils.getRequest(), Struts2Utils.getResponse());
      if (resultMap.get("return_code").equals("SUCCESS")) {
 String reqInfo = resultMap.get("req_info");
 String result = aesDecodeUtil.decode(reqInfo);
 Map resultMaps = HttpXmlUtils.parseRefundNotifyXml(result);
 refundOrder = refundOrderService.getOrderByOutRefundNo(resultMaps.get("out_refund_no"));
 if (resultMaps.get("refund_status").equals("SUCCESS")){
   refundOrder.setRefund_status(WeixinRefundStatusConstant.REFUND_SUCCESS);
 }else if (resultMaps.get("refund_status").equals("CHANGE")) {
   refundOrder.setRefund_status(WeixinRefundStatusConstant.REFUND_FAIL);
      }else if (resultMaps.get("refund_status").equals("REFUNDCLOSE")) {
   refundOrder.setRefund_status(WeixinRefundStatusConstant.REFUND_CLOSED);
      }
 refundOrder.setRefund_rew_account(resultMaps.get("refund_recv_account"));
 System.out.println(resultMaps.get("refund_recv_account"));
 refundOrderService.updateOrder(refundOrder);
 refundOrder = null;
 unifiedorder.setReturn_code("SUCCESS");
      }
      unifiedorder.setReturn_code("SUCCESS");
      String refundXml = HttpXmlUtils.refundXml(unifiedorder);
      Struts2Utils.getResponse().getWriter().write(refundXml);
      Struts2Utils.getResponse().getWriter().flush();
      } catch (Exception e) {
      log.error(e.getMessage());
      e.printStackTrace();
      return "500";
    }
    return null;
}

package com.wellness.platfront.common.weixinutil;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;
生成随机串

public class RandCharsUtils {
  private static SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");

  public static String getRandomString(int length) { //length表示生成字符串的长度
    String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";  
    Random random = new Random();  
    StringBuffer sb = new StringBuffer();
    int number = 0;
    for (int i = 0; i < length; i++) {  
      number = random.nextInt(base.length());  
      sb.append(base.charAt(number));  
    }  
    return sb.toString();  
  } 

  
  public static String timeStart(){
    return df.format(new Date());
  }

  
  public static String timeExpire(){
    Calendar now=Calendar.getInstance();
    now.add(Calendar.MINUTE,30);
    return df.format(now.getTimeInMillis());
  }

}

生成签名的类

package com.wellness.platfront.common.weixinutil;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;


public class WXSignUtils {
  
  @SuppressWarnings("rawtypes")
  public static String createSign(String characterEncoding,SortedMap parameters){
    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=" + weixinConstant.KEY);
    String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
    return sign;
  }
}

向微信发送消息的类

package com.wellness.platfront.common.weixinutil;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.net.ssl.HttpsURLConnection;

import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.xml.sax.InputSource;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import com.thoughtworks.xstream.io.xml.XmlFriendlyNameCoder;
import com.wellness.platfront.business.wechat.service.RefundOrderService;
import com.wellness.platfront.entity.weixin.Transfers;
import com.wellness.platfront.entity.weixin.Unifiedorder;

public class HttpXmlUtils {
  @Resource
  private RefundOrderService refundOrderService;
  public static XStream xStream = new XStream(new DomDriver("UTF-8",
      new XmlFriendlyNameCoder("-_", "_")));
  
  public static String xmlHttpProxy(String url,String xml,String method,String contentType){
    InputStream is = null;
    OutputStreamWriter os = null;
    try {
      URL _url = new URL(url);
      HttpURLConnection conn = (HttpURLConnection) _url.openConnection();
      conn.setDoInput(true);  
      conn.setDoOutput(true);  
      conn.setRequestProperty("Content-type", "text/xml");
      conn.setRequestProperty("Pragma:", "no-cache"); 
      conn.setRequestProperty("Cache-Control", "no-cache"); 
      conn.setRequestMethod("POST");
      os = new OutputStreamWriter(conn.getOutputStream());
      os.write(new String(xml.getBytes(contentType)));
      os.flush();
      //返回值
      is = conn.getInputStream();
      return getContent(is, "utf-8");
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } finally{
      try {
 if(os!=null){os.close();}
 if(is!=null){is.close();}
      } catch (IOException e) {
 e.printStackTrace();
      }
    }
    return null;
  }
  
  public static String getContent(InputStream is, String charset) {
    String pageString = null;
    InputStreamReader isr = null;
    BufferedReader br = null;
    StringBuffer sb = null;
    try {
      isr = new InputStreamReader(is, charset);
      br = new BufferedReader(isr);
      sb = new StringBuffer();
      String line = null;
      while ((line = br.readLine()) != null) {
 sb.append(line + "n");
      }
      pageString = sb.toString();
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
 if (is != null){
   is.close();
 }
 if(isr!=null){
   isr.close();
 }
 if(br!=null){
   br.close();
 }
      } catch (IOException e) {
 e.printStackTrace();
      }
      sb = null;
    }
    return pageString;
  }
  
  public static Map parseRefundXml(String refundXml) throws JDOMException, IOException{
    ParseXMLUtils.jdomParseXml(refundXml);
    StringReader read = new StringReader(refundXml);
    // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    InputSource source = new InputSource(read);
    // 创建一个新的SAXBuilder
    SAXBuilder sb = new SAXBuilder();
    // 通过输入源构造一个document
    org.jdom.document doc;
    doc = (org.jdom.document) sb.build(source);
    org.jdom.Element root = doc.getRootElement();// 指向根节点
    List list = root.getChildren();
    Map refundOrderMap = new HashMap();
    if(list!=null&&list.size()>0){
      for (org.jdom.Element element : list) {
 refundOrderMap.put(element.getName(), element.getText());
      }
      return refundOrderMap;
      }
    return null;
  }
  
  public static Map parseRefundNotifyXml(String refundXml) throws JDOMException, IOException{
    ParseXMLUtils.jdomParseXml(refundXml);
    StringReader read = new StringReader(refundXml);
    // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    InputSource source = new InputSource(read);
    // 创建一个新的SAXBuilder
    SAXBuilder sb = new SAXBuilder();
    // 通过输入源构造一个document
    org.jdom.document doc;
    doc = (org.jdom.document) sb.build(source);
    org.jdom.Element root = doc.getRootElement();// 指向根节点
    List list = root.getChildren();
    Map resultMap = new HashMap<>();
    if(list!=null&&list.size()>0){
      for (org.jdom.Element element : list){
 resultMap.put(element.getName(), element.getText());
      }
    return resultMap;
    }
    return null;
  }
  
  public static Map getUrl(Unifiedorder unifiedorder) throws JDOMException, IOException{
    String xmlInfo = HttpXmlUtils.xmlH5Info(unifiedorder);
    String wxUrl = weixinConstant.URL;
    String method = "POST";
    String weixinPost = HttpXmlUtils.httpsRequest(wxUrl, method, xmlInfo).toString();
    ParseXMLUtils.jdomParseXml(weixinPost);
    StringReader read = new StringReader(weixinPost);
    // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    InputSource source = new InputSource(read);
    // 创建一个新的SAXBuilder
    SAXBuilder sb = new SAXBuilder();
    // 通过输入源构造一个document
    org.jdom.document doc;
    doc = (org.jdom.document) sb.build(source);
    org.jdom.Element root = doc.getRootElement();// 指向根节点
    List list = root.getChildren();
    String prepayId =null;
    Map msg = new HashMap();
    if(list!=null&&list.size()>0){
      for (org.jdom.Element element : list) {
      msg.put(element.getName(), element.getText());
      }
      }
    return msg;
  }
  
  public static String getPrepareId(Unifiedorder unifiedorder) throws JDOMException, IOException{
    String xmlInfo = HttpXmlUtils.xmlInfo(unifiedorder);
    String wxUrl = weixinConstant.URL;
    String method = "POST";
    String weixinPost = HttpXmlUtils.httpsRequest(wxUrl, method, xmlInfo).toString();
    ParseXMLUtils.jdomParseXml(weixinPost);
    StringReader read = new StringReader(weixinPost);
    // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    InputSource source = new InputSource(read);
    // 创建一个新的SAXBuilder
    SAXBuilder sb = new SAXBuilder();
    // 通过输入源构造一个document
    org.jdom.document doc;
    doc = (org.jdom.document) sb.build(source);
    org.jdom.Element root = doc.getRootElement();// 指向根节点
    List list = root.getChildren();
    String prepayId =null;
    if(list!=null&&list.size()>0){
      for (org.jdom.Element element : list) {
 if ( "prepay_id".equals(element.getName())) {
   prepayId= element.getText();
   break;
 }
      }
      }
    return prepayId;
  }
  
  public static Map getTransfersMap(Transfers transfers) throws JDOMException, IOException{
    String xmlInfo = HttpXmlUtils.xmlTransfer(transfers);
    String wxUrl = weixinConstant.WITHDRAW_URL;
    String method = "POST";
    String weixinPost = HttpXmlUtils.httpsRequest(wxUrl, method, xmlInfo).toString();
    ParseXMLUtils.jdomParseXml(weixinPost);
    StringReader read = new StringReader(weixinPost);
    // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
    InputSource source = new InputSource(read);
    // 创建一个新的SAXBuilder
    SAXBuilder sb = new SAXBuilder();
    // 通过输入源构造一个document
    org.jdom.document doc;
    doc = (org.jdom.document) sb.build(source);
    org.jdom.Element root = doc.getRootElement();// 指向根节点
    List list = root.getChildren();
    Map transferMap=new HashMap<>();
    if(list!=null&&list.size()>0){
      for (org.jdom.Element element : list) {
 transferMap.put(element.getName(), element.getText());
      }
      }
    return transferMap;
  }
  
  public static String refundXml(Unifiedorder unifiedorder){
      xStream.autodetectAnnotations(true);
      xStream.alias("xml", Unifiedorder.class);
      return xStream.toXML(unifiedorder);
  }
  
  public static String transferXml(Transfers transfers){
      xStream.autodetectAnnotations(true);
      xStream.alias("xml", Transfers.class);
      return xStream.toXML(transfers);
  }
  
  public static String xmlInfo(Unifiedorder unifiedorder){

    if(unifiedorder!=null){
      StringBuffer bf = new StringBuffer();
      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");
      return bf.toString();
    }
    return "";
  }
  
  public static String xmlH5Info(Unifiedorder unifiedorder){
    if(unifiedorder!=null){
      StringBuffer bf = new StringBuffer();
      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");


      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");
      return bf.toString();
    }
    return "";
  }
  
  public static String xmlTransfer(Transfers transfers){

    if(transfers!=null){
      StringBuffer bf = new StringBuffer();
      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");


      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");

      bf.append("");
      return bf.toString();
    }
    return "";
  }
  
  public static String httpsRequest(String requestUrl, String requestMethod, String output) {
    try{
      URL url = new URL(requestUrl);
      HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
      connection.setDoOutput(true);
      connection.setDoInput(true);
      connection.setUseCaches(false);
      connection.setRequestMethod(requestMethod);
      if (null != output) {
 OutputStream outputStream = connection.getOutputStream();
 outputStream.write(output.getBytes("UTF-8"));
 outputStream.close();
      }
      // 从输入流读取返回内容
      InputStream inputStream = connection.getInputStream();
      InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
      BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
      String str = null;
      StringBuffer buffer = new StringBuffer();
      while ((str = bufferedReader.readLine()) != null) {
 buffer.append(str);
      }
      bufferedReader.close();
      inputStreamReader.close();
      inputStream.close();
      inputStream = null;
      connection.disconnect();
      return buffer.toString();
    }catch(Exception ex){
      ex.printStackTrace();
    }
    return "";
  }
}

加载证书

package com.wellness.platfront.common.weixinutil;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;

public class HttpUtil {
  
  public static CloseableHttpResponse Post(String url, String outputEntity, boolean isLoadCert) throws Exception {
    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
    httpPost.addHeader("Content-Type", "text/xml");
    httpPost.setEntity(new StringEntity(outputEntity, "UTF-8"));
    if (isLoadCert) {
      // 加载含有证书的http请求
      return HttpClients.custom().setSSLSocketFactory(CertUtil.initCert()).build().execute(httpPost);
    } else {
      return HttpClients.custom().build().execute(httpPost);
    }
  }
}

加载证书的类

package com.wellness.platfront.common.weixinutil;

import java.io.File;
import java.io.FileInputStream;
import java.security.KeyStore;

import javax.net.ssl.SSLContext;

import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.ssl.SSLContexts;



@SuppressWarnings("deprecation")
public class CertUtil {
  private static WeixinConfigUtils config = new WeixinConfigUtils();
  
  public static SSLConnectionSocketFactory initCert() throws Exception {
    FileInputStream instream = null;
    KeyStore keyStore = KeyStore.getInstance("PKCS12");
    instream = new FileInputStream(new File(weixinConstant.PATH));
    keyStore.load(instream, config.mch_id.toCharArray());

    if (null != instream) {
      instream.close();
    }

    SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore,config.mch_id.toCharArray()).build();
    SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[]{"TLSv1"}, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);

    return sslsf;
  }
}

解密微信退款中返回相关信息的字符串

package com.wellness.platfront.common.weixinutil;

import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.base64;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.springframework.stereotype.Service;

import com.wellness.platfront.common.wechat.utils.MD5;


@Service
public class AESDecodeUtil {

   public static final String ALGORITHM = "AES/ECB/PKCS7Padding"; 
   public String decode(String reqInfo) throws Exception{
    try {
      byte[] decodebase64 = base64.decodebase64(reqInfo);
      String md5Key = MD5.MD5Encode(weixinConstant.KEY);
      Security.addProvider(new BouncyCastleProvider());
      Cipher cipher = Cipher.getInstance(ALGORITHM); 
      SecretKey keySpec = new SecretKeySpec(md5Key.getBytes(), "AES"); //生成加密解密需要的Key 
      cipher.init(Cipher.DECRYPT_MODE, keySpec); 
      byte[] decoded = cipher.doFinal(decodebase64); 
      String result = new String(decoded, "UTF-8"); 
      return result;
    } catch (Exception e) {
      e.printStackTrace();
    }
    return null;
   }
}

微信解析xml：带有CDATA格式的

package com.wellness.platfront.common.weixinutil;


import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringReader;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jdom.document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.xml.sax.InputSource;

import com.wellness.platfront.entity.weixin.UnifiedorderResult;
import com.wellness.platfront.entity.weixin.WXPayResult;



public class JdomParseXmlUtils {

  
  @SuppressWarnings("unchecked")
  public static UnifiedorderResult getUnifiedorderResult(String xml){
    UnifiedorderResult unifieorderResult = new UnifiedorderResult();
    try { 
      StringReader read = new StringReader(xml);
      // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
      InputSource source = new InputSource(read);
      // 创建一个新的SAXBuilder
      SAXBuilder sb = new SAXBuilder();
      // 通过输入源构造一个document
      document doc;
      doc = (document) sb.build(source);

      Element root = doc.getRootElement();// 指向根节点
      List list = root.getChildren();

      if(list!=null&&list.size()>0){
 for (Element element : list) {
   System.out.println("key是："+element.getName()+"，值是："+element.getText());

   if("return_code".equals(element.getName())){
     unifieorderResult.setReturn_code(element.getText());
   }

   if("return_msg".equals(element.getName())){
     unifieorderResult.setReturn_msg(element.getText());
   }

   if("appid".equals(element.getName())){
     unifieorderResult.setAppid(element.getText());
   }


   if("mch_id".equals(element.getName())){
     unifieorderResult.setMch_id(element.getText());
   }

   if("nonce_str".equals(element.getName())){
     unifieorderResult.setNonce_str(element.getText());
   }

   if("sign".equals(element.getName())){
     unifieorderResult.setSign(element.getText());
   }

   if("result_code".equals(element.getName())){
     unifieorderResult.setResult_code(element.getText());
   }

   if("prepay_id".equals(element.getName())){
     unifieorderResult.setPrepay_id(element.getText());
   }

   if("trade_type".equals(element.getName())){
     unifieorderResult.setTrade_type(element.getText());
   }
 }
      }

    } catch (JDOMException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }catch (Exception e) {
      e.printStackTrace();
    }

    return unifieorderResult;
  }

  
  @SuppressWarnings("unchecked")
  public static Map getWeixinResult(HttpServletRequest request,HttpServletResponse response){
    Map resultMap = new HashMap<>();
     try {
 PrintWriter writer = response.getWriter();
   InputStream inStream = request.getInputStream();
   ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
   byte[] buffer = new byte[1024];
   int len = 0;
   while ((len = inStream.read(buffer)) != -1) {
     outSteam.write(buffer, 0, len);
   }
   outSteam.close();
   inStream.close();
   String result = new String(outSteam.toByteArray(), "utf-8");
   StringReader read = new StringReader(result);
   InputSource source = new InputSource(read);
   // 创建一个新的SAXBuilder
   SAXBuilder sb = new SAXBuilder();
   // 通过输入源构造一个document
   document doc;
   doc = (document) sb.build(source);

   Element root = doc.getRootElement();// 指向根节点
   List list = root.getChildren();

   if(list!=null&&list.size()>0){
     for (Element element : list) {
resultMap.put(element.getName(), element.getText());
     }
   }
 return resultMap;
 } catch (Exception e) {
   e.printStackTrace();
 }
     return null;
  }


  
  @SuppressWarnings("unchecked")
  public static WXPayResult getWXPayResult(String xml){
    WXPayResult wXPayResult = new WXPayResult();
    try { 
      StringReader read = new StringReader(xml);
      // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
      InputSource source = new InputSource(read);
      // 创建一个新的SAXBuilder
      SAXBuilder sb = new SAXBuilder();
      // 通过输入源构造一个document
      document doc;
      doc = (document) sb.build(source);

      Element root = doc.getRootElement();// 指向根节点
      List list = root.getChildren();

      if(list!=null&&list.size()>0){
 for (Element element : list) {
   if("return_code".equals(element.getName())){
     wXPayResult.setReturn_code(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }


   if("appid".equals(element.getName())){
     wXPayResult.setAppid(element.getText());
   }

   if("mch_id".equals(element.getName())){
     wXPayResult.setMch_id(element.getText());
   }

   if("nonce_str".equals(element.getName())){
     wXPayResult.setNonce_str(element.getText());
   }

   if("sign".equals(element.getName())){
     wXPayResult.setSign(element.getText());
   }

   if("result_code".equals(element.getName())){
     wXPayResult.setResult_code(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

   if("return_msg".equals(element.getName())){
     wXPayResult.setReturn_msg(element.getText());
   }

 }
      }

    } catch (JDOMException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }catch (Exception e) {
      e.printStackTrace();
    }

    return wXPayResult;
  }

}

package com.wellness.platfront.common.weixinutil;


import java.io.IOException;
import java.io.StringReader;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.dom4j.document;
import org.dom4j.documentException;
import org.dom4j.documentHelper;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.xml.sax.InputSource;

public class ParseXMLUtils {

  
  @SuppressWarnings("rawtypes")
  public static void beginXMLParse(String xml){
    document doc = null;
    try {
      doc = documentHelper.parseText(xml); // 将字符串转为XML

      Element rootElt = doc.getRootElement(); // 获取根节点smsReport

      System.out.println("根节点是："+rootElt.getName());

      Iterator iters = rootElt.elementIterator("sendResp"); // 获取根节点下的子节点sms

      while (iters.hasNext()) {
 Element recordEle1 = (Element) iters.next();
 Iterator iter = recordEle1.elementIterator("sms");

 while (iter.hasNext()) {
   Element recordEle = (Element) iter.next();
   String phone = recordEle.elementTextTrim("phone"); // 拿到sms节点下的子节点stat值

   String smsID = recordEle.elementTextTrim("smsID"); // 拿到sms节点下的子节点stat值

   System.out.println(phone+":"+smsID);
 }
      }
    } catch (documentException e) {
      e.printStackTrace();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  
  public static void xpathParseXml(String xml){
    try { 
      StringReader read = new StringReader(xml);
      SAXReader saxReader = new SAXReader();
      document doc = saxReader.read(read);
      String xpath ="/xml/appid";
      System.out.print(doc.selectSingleNode(xpath).getText()); 
    } catch (documentException e) {
      e.printStackTrace();
    } 
  }

  
  @SuppressWarnings("unchecked")
  public static void jdomParseXml(String xml){
    try { 
      StringReader read = new StringReader(xml);
      // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
      InputSource source = new InputSource(read);
      // 创建一个新的SAXBuilder
      SAXBuilder sb = new SAXBuilder();
      // 通过输入源构造一个document
      org.jdom.document doc;
      doc = (org.jdom.document) sb.build(source);

      org.jdom.Element root = doc.getRootElement();// 指向根节点
      List list = root.getChildren();

      if(list!=null&&list.size()>0){
 for (org.jdom.Element element : list) {
   

 }
      }

    } catch (JDOMException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }catch (Exception e) {
      e.printStackTrace();
    }
  }

  public static boolean parseInt(String key){
    if(!StringUtils.isEmpty(key)){
      if(key.equals("total_fee")||key.equals("cash_fee")||key.equals("coupon_fee")||key.equals("coupon_count")||key.equals("coupon_fee_0")){
 return true;
      }
    }

    return false;
  }

}

微信支付相关的常量

package com.wellness.platfront.common.weixinutil;

public class weixinConstant {
  
  public static final String KEY = "eAO9gDBK7NjqkYEvRFB82CspUTINiWnD";

  
  public static final String URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";
  
  public static final String REFUND_URL = "https://api.mch.weixin.qq.com/secapi/pay/refund";
  
  public static final String PATH ="";
  
  public static final String WITHDRAW_URL="https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";
}

微信退款状态常量

package com.wellness.platfront.common.weixinutil;

public class WeixinRefundStatusConstant {
  //退款申请成功
  public static final String APPLY_SUCCESS="退款申请成功";
  //退款申请失败
  public static final String APPLY_FAIL="退款申请失败";
  //退款成功
  public static final String REFUND_SUCCESS="退款成功";
  //退款异常
  public static final String REFUND_FAIL="退款异常";
  //退款关闭
  public static final String REFUND_CLOSED="退款关闭";

}

微信退款订单信息

package com.wellness.platfront.entity.weixin;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;


@Entity
@Table(name = "weixin_refund_order")
public class RefundOrder implements Serializable{
  private static final long serialVersionUID = 1L;
  //退款订单id
  public Integer refundOrderId;
  //微信公众账号
  public String appid;
  //微信商户号
  public String mch_id;
  //微信订单号
  public String transaction_id;
  //商户订单号
  public String out_trade_no;
  //商户退款单号
  public String out_refund_no;
  //微信退款单号
  public String refund_id;
  //退款金额
  public Integer refund_fee;
  //订单总价格
  public Integer tatol_fee;
  //退款发起时间
  public Date create_time;
  //退款状态  申请退款中 申请退款失败 退款成功 退款异常  退款关闭
  public String refund_status;
  //退款退还账户
  public String refund_rew_account;
  //退款完成时间
  public Date end_time;
  //订单退还方式
    public String refundType;
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "refund_order_id", nullable = false)
  public Integer getRefundOrderId() {
    return refundOrderId;
  }
  public void setRefundOrderId(Integer refundOrderId) {
    this.refundOrderId = refundOrderId;
  }
  @Column(name = "appid", nullable = false)
  public String getAppid() {
    return appid;
  }
  public void setAppid(String appid) {
    this.appid = appid;
  }
  @Column(name = "mch_id", nullable = false)
  public String getMch_id() {
    return mch_id;
  }
  public void setMch_id(String mch_id) {
    this.mch_id = mch_id;
  }
  @Column(name = "transaction_id", nullable = false)
  public String getTransaction_id() {
    return transaction_id;
  }
  public void setTransaction_id(String transaction_id) {
    this.transaction_id = transaction_id;
  }
  @Column(name = "out_trade_no", nullable = false)
  public String getOut_trade_no() {
    return out_trade_no;
  }
  public void setOut_trade_no(String out_trade_no) {
    this.out_trade_no = out_trade_no;
  }
  @Column(name = "out_refund_no", nullable = false)
  public String getOut_refund_no() {
    return out_refund_no;
  }
  public void setOut_refund_no(String out_refund_no) {
    this.out_refund_no = out_refund_no;
  }
  @Column(name = "refund_id", nullable = false)
  public String getRefund_id() {
    return refund_id;
  }
  public void setRefund_id(String refund_id) {
    this.refund_id = refund_id;
  }
  @Column(name = "refund_fee", nullable = false)
  public Integer getRefund_fee() {
    return refund_fee;
  }
  public void setRefund_fee(Integer refund_fee) {
    this.refund_fee = refund_fee;
  }
  @Column(name = "tatol_fee", nullable = false)
  public Integer getTatol_fee() {
    return tatol_fee;
  }
  public void setTatol_fee(Integer tatol_fee) {
    this.tatol_fee = tatol_fee;
  }
  @Column(name = "create_time", nullable = false)
  public Date getCreate_time() {
    return create_time;
  }
  public void setCreate_time(Date create_time) {
    this.create_time = create_time;
  }
  @Column(name = "refund_status", nullable = false)
  public String getRefund_status() {
    return refund_status;
  }
  public void setRefund_status(String refund_status) {
    this.refund_status = refund_status;
  }
  @Column(name = "refund_rew_account")
  public String getRefund_rew_account() {
    return refund_rew_account;
  }
  public void setRefund_rew_account(String refund_rew_account) {
    this.refund_rew_account = refund_rew_account;
  }
  @Column(name = "end_time")
  public Date getEnd_time() {
    return end_time;
  }
  public void setEnd_time(Date end_time) {
    this.end_time = end_time;
  }

  @Column(name = "refund_type")
  public String getRefundType() {
    return refundType;
  }
  public void setRefundType(String refundType) {
    this.refundType = refundType;
  }
}

这个实体类中参数和微信官方需要的参数一致

package com.wellness.platfront.entity.weixin;

import java.io.Serializable;
import com.wellness.platfront.entity.member.Member;


public class Unifiedorder implements Serializable{
  private static final long serialVersionUID = 1L;
  //微信支付表id
  private Integer weixinId;
  //微信分配的公众账号ID（企业号corpid即为此appId）
  private String appid;
  //商户id
  private String mch_id;
  //终端设备号(门店号或收银设备ID)，注意：PC网页或公众号内支付请传"WEB"
  private String device_info;
  //随机字符串:数字+大写字母的组合，32位
  private String nonce_str;
  //签名
  private String sign;
  //商品或支付单简要描述
  private String body;
  //商品名称明细列表
  private String detail;
  //附加参数（例如：用于区别本商户不同的分店）
  private String attach;
  //商户系统内部的订单号
  private String out_trade_no;
  //货币类型:符合ISO 4217标准的三位字母代码，默认人民币：CNY
  private String fee_type;
  //总金额
  private int total_fee;
  //APP和网页支付提交[用户端ip]，Native支付填调用微信支付API的机器IP。
  private String spbill_create_ip;
  //订单生成时间，格式为yyyyMMddHHmmss，
  private String time_start;
  //订单失效时间，格式为yyyyMMddHHmmss，最短失效时间间隔必须大于5分钟[支付宝是30分钟，同样30分钟]
  private String time_expire;
  //商品标记，代金券或立减优惠功能的参数
  private String goods_tag;
  //接收微信支付异步通知回调地址
  private String notify_url;
  //交易类型:JSAPI，NATIVE，APP h5为 MWEB
  private String trade_type;
  //trade_type=NATIVE，此参数必传。此id为二维码中包含的商品ID，商户自行定义。
  private String product_id;
  //no_credit--指定不能使用信用卡支付
  private String limit_pay;
  //trade_type=JSAPI，此参数必传，用户在商户appid下的唯一标识
  private String openid;
  //商户内部自己的退款单号
  private String out_refund_no;
  //退款总金额单位为分
  private int refund_fee;
  //操作员的id默认为mch_id
  private String op_user_id;
  //微信官方提供的订单号
  private String prepayid;
  //记录所对应的member
  private Member member;
  //返回给微信的状态码（用于支付回调时）
  public String return_code;
  //微信h5支付时候的场景信息官方的信息模板 {"h5_info"://h5支付固定传"h5_info" 
  //{"type":"",//场景类型 "wap_url":"",//WAP网站URL地址"wap_name": ""//WAP 网站名}}
  public String scene_info;
  public String getScene_info() {
    return scene_info;
  }
  public void setScene_info(String scene_info) {
    this.scene_info = scene_info;
  }
  public String getReturn_code() {
    return return_code;
  }
  public void setReturn_code(String return_code) {
    this.return_code = return_code;
  }
  public String getAppid() {
    return appid;
  }
  public String getMch_id() {
    return mch_id;
  }
  public String getDevice_info() {
    return device_info;
  }
  public String getNonce_str() {
    return nonce_str;
  }
  public String getSign() {
    return sign;
  }
  public String getBody() {
    return body;
  }
  public String getDetail() {
    return detail;
  }
  public String getAttach() {
    return attach;
  }
  public String getOut_trade_no() {
    return out_trade_no;
  }
  public String getFee_type() {
    return fee_type;
  }
  public int getTotal_fee() {
    return total_fee;
  }
  public String getSpbill_create_ip() {
    return spbill_create_ip;
  }
  public String getTime_start() {
    return time_start;
  }
  public String getTime_expire() {
    return time_expire;
  }
  public String getGoods_tag() {
    return goods_tag;
  }
  public String getNotify_url() {
    return notify_url;
  }
  public String getTrade_type() {
    return trade_type;
  }
  public String getProduct_id() {
    return product_id;
  }
  public String getLimit_pay() {
    return limit_pay;
  }
  public String getOpenid() {
    return openid;
  }
  public void setAppid(String appid) {
    this.appid = appid;
  }
  public void setMch_id(String mch_id) {
    this.mch_id = mch_id;
  }
  public void setDevice_info(String device_info) {
    this.device_info = device_info;
  }
  public void setNonce_str(String nonce_str) {
    this.nonce_str = nonce_str;
  }
  public void setSign(String sign) {
    this.sign = sign;
  }
  public void setBody(String body) {
    this.body = body;
  }
  public void setDetail(String detail) {
    this.detail = detail;
  }
  public void setAttach(String attach) {
    this.attach = attach;
  }
  public void setOut_trade_no(String out_trade_no) {
    this.out_trade_no = out_trade_no;
  }
  public void setFee_type(String fee_type) {
    this.fee_type = fee_type;
  }
  public void setTotal_fee(int total_fee) {
    this.total_fee = total_fee;
  }
  public void setSpbill_create_ip(String spbill_create_ip) {
    this.spbill_create_ip = spbill_create_ip;
  }
  public void setTime_start(String time_start) {
    this.time_start = time_start;
  }
  public void setTime_expire(String time_expire) {
    this.time_expire = time_expire;
  }
  public void setGoods_tag(String goods_tag) {
    this.goods_tag = goods_tag;
  }
  public void setNotify_url(String notify_url) {
    this.notify_url = notify_url;
  }
  public void setTrade_type(String trade_type) {
    this.trade_type = trade_type;
  }
  public void setProduct_id(String product_id) {
    this.product_id = product_id;
  }
  public void setLimit_pay(String limit_pay) {
    this.limit_pay = limit_pay;
  }
  public void setOpenid(String openid) {
    this.openid = openid;
  }
  public String getOut_refund_no() {
    return out_refund_no;
  }
  public void setOut_refund_no(String out_refund_no) {
    this.out_refund_no = out_refund_no;
  }
  public int getRefund_fee() {
    return refund_fee;
  }
  public void setRefund_fee(int refund_fee) {
    this.refund_fee = refund_fee;
  }
  public Integer getWeixinId() {
    return weixinId;
  }
  public void setWeixinId(Integer weixinId) {
    this.weixinId = weixinId;
  }
  public Member getMember() {
    return member;
  }
  public void setMember(Member member) {
    this.member = member;
  }
  public String getPrepayid() {
    return prepayid;
  }
  public void setPrepayid(String prepayid) {
    this.prepayid = prepayid;
  }
  public String getOp_user_id() {
    return op_user_id;
  }
  public void setOp_user_id(String op_user_id) {
    this.op_user_id = op_user_id;
  }


}

统一下单微信返回的参数组（xml）

package com.wellness.platfront.entity.weixin;


public class UnifiedorderResult {
  private String appid;//appid
  private String mch_id;//商家id
  private String device_info;//设备号
  private String nonce_str;//随机字符串
  private String sign;//签名
  private String result_code;//错误码
  private String err_code;//错误代码
  private String err_code_des;//错误返回的信息描述
  private String trade_type;//调用接口提交的交易类型，取值如下：JSAPI，NATIVE，APP
  private String prepay_id;//微信生成的预支付回话标识，用于后续接口调用中使用，该值有效期为2小时
  private String code_url;//trade_type为NATIVE是有返回，可将该参数值生成二维码展示出来进行扫码支付

  private String return_code;//返回状态码SUCCESS/FAIL此字段是通信标识，非交易标识，交易是否成功需要查看result_code来判断
  private String return_msg;//返回信息
  public String getAppid() {
    return appid;
  }
  public String getMch_id() {
    return mch_id;
  }
  public String getDevice_info() {
    return device_info;
  }
  public String getNonce_str() {
    return nonce_str;
  }
  public String getSign() {
    return sign;
  }
  public String getResult_code() {
    return result_code;
  }
  public String getErr_code() {
    return err_code;
  }
  public String getErr_code_des() {
    return err_code_des;
  }
  public String getTrade_type() {
    return trade_type;
  }
  public String getPrepay_id() {
    return prepay_id;
  }
  public String getCode_url() {
    return code_url;
  }
  public void setAppid(String appid) {
    this.appid = appid;
  }
  public void setMch_id(String mch_id) {
    this.mch_id = mch_id;
  }
  public void setDevice_info(String device_info) {
    this.device_info = device_info;
  }
  public void setNonce_str(String nonce_str) {
    this.nonce_str = nonce_str;
  }
  public void setSign(String sign) {
    this.sign = sign;
  }
  public void setResult_code(String result_code) {
    this.result_code = result_code;
  }
  public void setErr_code(String err_code) {
    this.err_code = err_code;
  }
  public void setErr_code_des(String err_code_des) {
    this.err_code_des = err_code_des;
  }
  public void setTrade_type(String trade_type) {
    this.trade_type = trade_type;
  }
  public void setPrepay_id(String prepay_id) {
    this.prepay_id = prepay_id;
  }
  public void setCode_url(String code_url) {
    this.code_url = code_url;
  }
  public String getReturn_code() {
    return return_code;
  }
  public String getReturn_msg() {
    return return_msg;
  }
  public void setReturn_code(String return_code) {
    this.return_code = return_code;
  }
  public void setReturn_msg(String return_msg) {
    this.return_msg = return_msg;
  }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。