微信APP支付-java后台实现
不说废话，直接上代码
先是工具类（注意签名时要排序）：
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.KeyStore;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap; import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext; import org.apache.http.Consts;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder; import com.system.property.WXProperty;
import com.system.util.Tools; public class PayCommonUtil { /**
* post请求并得到返回结果
* @param requestUrl
* @param requestMethod
* @param output
* @return
*/
public static String httpsRequest21(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 "";
} // 随机字符串生成
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();
for (int i = 0; i < length; i++) {
int number = random.nextInt(base.length());
sb.append(base.charAt(number));
}
return sb.toString();
} // 请求xml组装
public static String getRequestXml(SortedMap<String, Object> parameters) {
StringBuffer sb = new StringBuffer();
sb.append("<xml>");
Set es = parameters.entrySet(); Iterator it = es.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String key = (String) entry.getKey();
// String value = (String) entry.getValue();
Object value = entry.getValue();
// || "body".equalsIgnoreCase(key) || "sign".equalsIgnoreCase(key)
if ("attach".equalsIgnoreCase(key) || "body".equalsIgnoreCase(key) || "sign".equalsIgnoreCase(key)) {
sb.append("<" + key + ">" + "<![CDATA[" + value + "]]></" + key + ">");
} else {
sb.append("<" + key + ">" + value + "</" + key + ">");
}
}
sb.append("</xml>");
return sb.toString();
} // 生成签名
public static String createSign(String characterEncoding, SortedMap<String, Object> parameterMap) {
if (parameterMap == null) {
return null;
}
StringBuffer sb = new StringBuffer();
List<String> keys = new ArrayList<>(parameterMap.keySet());
Collections.sort(keys); for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
// String value = (String) parameters.get(key);
Object value = parameterMap.get(key);
// if (Tools.notEmpty(value)) {
sb.append((i == 0 ? "" : "&") + key + "=" + value);
// }
}
sb.append("&key=" + WXProperty.get("API_KEY"));
System.out.println("【生成签名 】" + sb.toString());
String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
} // 微信支付请求
public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
try {
URL url = new URL(requestUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
// 设置请求方式（GET/POST）
conn.setRequestMethod(requestMethod);
conn.setRequestProperty("content-type", "application/x-www-form-urlencoded");
// 当outputStr不为null时向输出流写数据
if (null != outputStr) {
OutputStream outputStream = conn.getOutputStream();
// 注意编码格式
outputStream.write(outputStr.getBytes("UTF-8"));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = conn.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str;
StringBuffer buffer = new StringBuffer();
while ((str = bufferedReader.readLine()) != null) {
buffer.append(str);
}
// 释放资源
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
conn.disconnect();
return buffer.toString();
} catch (ConnectException ce) {
System.out.println("连接超时：" + ce);
} catch (Exception e) {
System.out.println("https请求异常" + e);
}
return null;
} // 退款的请求方法
public static String httpsRequest2(String requestUrl, String requestMethod, String outputStr) throws Exception {
KeyStore keyStore = KeyStore.getInstance("PKCS12");
StringBuilder res = new StringBuilder("");
FileInputStream instream = new FileInputStream(new File("/home/apiclient_cert.p12"));
try {
keyStore.load(instream, "".toCharArray());
} finally {
instream.close();
} // Trust own CA and all self-signed certs
SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, "1313329201".toCharArray()).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("https://api.mch.weixin.qq.com/secapi/pay/refund");
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) ");
StringEntity entity2 = new StringEntity(outputStr, Consts.UTF_8);
httpost.setEntity(entity2);
System.out.println("executing request" + httpost.getRequestLine()); CloseableHttpResponse response = httpclient.execute(httpost); try {
HttpEntity entity = response.getEntity(); System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
if (entity != null) {
System.out.println("Response content length: " + entity.getContentLength());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
String text = "";
res.append(text);
while ((text = bufferedReader.readLine()) != null) {
res.append(text);
System.out.println(text);
} }
EntityUtils.consume(entity);
} finally {
response.close();
}
} finally {
httpclient.close();
}
return res.toString(); } // xml解析
public static SortedMap<String, Object> doXMLParse(String strxml){
strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\""); if (null == strxml || "".equals(strxml)) {
return null;
} SortedMap<String, Object> m = new TreeMap<>(); InputStream in;
try {
in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
SAXBuilder builder = new SAXBuilder();
Document doc = builder.build(in);
Element root = doc.getRootElement();
List list = root.getChildren();
Iterator it = list.iterator();
while (it.hasNext()) {
Element e = (Element) it.next();
String k = e.getName();
String v = "";
List children = e.getChildren();
if (children.isEmpty()) {
v = e.getTextNormalize();
} else {
v = getChildrenText(children);
} m.put(k, v);
} // 关闭流
in.close();
} catch (Exception e1) {
e1.printStackTrace();
} return m;
} public static String getChildrenText(List children) {
StringBuffer sb = new StringBuffer();
if (!children.isEmpty()) {
Iterator it = children.iterator();
while (it.hasNext()) {
Element e = (Element) it.next();
String name = e.getName();
String value = e.getTextNormalize();
List list = e.getChildren();
sb.append("<" + name + ">");
if (!list.isEmpty()) {
sb.append(getChildrenText(list));
}
sb.append(value);
sb.append("</" + name + ">");
}
} return sb.toString();
} /**
* 验证微信回调签名
* @Description
* @Author zhaozhenhua
* @date 2018年5月10日
* @param pd
* @return
* @throws Exception
*/
public static boolean checkWXSign(SortedMap<String, Object> receiveMap) {
String signFromAPIResponse = (String) receiveMap.get("sign");
if (Tools.isEmpty(signFromAPIResponse)) {
System.out.println("API返回的数据签名数据不存在，有可能被第三方篡改!!!");
return false;
}
//清掉返回数据对象里面的Sign数据（不能把这个数据也加进去进行签名），然后用签名算法进行签名
receiveMap.remove("sign");
String responseSign = createSign("utf-8", receiveMap);
if (!responseSign.equals(signFromAPIResponse)) {
//签名验不过，表示这个API返回的数据有可能已经被篡改了
System.out.println("API返回的数据签名验证不通过，有可能被第三方篡改!!! responseSign生成的签名为" + responseSign);
return false;
} System.out.println("服务器回包里面的签名是:" + signFromAPIResponse);
return true;
} }
配置文件信息读取：
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; public class WXProperty {
private static final Logger logger = LoggerFactory.getLogger(WXProperty.class); private static Properties props;
static{
loadProps();
} synchronized static private void loadProps(){
props = new Properties();
InputStream in = null; try {
in = WXProperty.class.getClassLoader().getResourceAsStream("wxinfo.properties");
props.load(in);
} catch (FileNotFoundException e) {
logger.error("payment.properties文件未找到");
} catch (IOException e) {
logger.error("出现IOException");
} finally {
try {
if(null != in) {
in.close();
}
} catch (IOException e) {
logger.error("payment.properties文件流关闭出现异常");
}
}
} //读取key对应的value
public static String get(String key){
if(null == props) {
loadProps();
}
return props.getProperty(key);
} }
配置文件（前三个配置为微信申请APP支付通过后给的，而回调地址是自己定义的，在微信统一下单成功后会随着相应信息返回给前端，前端处理成功后执行这个回调接口）：
#服务号的应用ID
APP_ID = XXXXXX
#商户号
MCH_ID = XXXXXXX
#API密钥（前三个为微信申请获得）
API_KEY = XXXXXXX
#签名加密方式
SIGN_TYPE = MD5
#微信支付证书名称
CERT_PATH = XXXXX
#微信回调地址(自己定义)
notify_url = XXXXX/success
MD5加密方法：
public class MD5Util {
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];
}
public 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" };
}
微信支付统一下单接口封装的方法：
public synchronized static SortedMap<String, Object> weixinPrePay (PageData pd) throws JDOMException, IOException{
Map<String,String> returnMap = new HashMap<>();
String trade_no = (String) pd.get("ORDERNUMBER");
//支付金额
BigDecimal totalAmount = new BigDecimal((String)pd.get("ORDERMONEY"));
//描述（以商品标题做为描述）
String description = "XXXX："+trade_no;
//预支付
SortedMap<String, Object> parameterMap = new TreeMap<String, Object>();
parameterMap.put("appid", WXProperty.get("APP_ID"));
parameterMap.put("mch_id", WXProperty.get("MCH_ID"));
parameterMap.put("nonce_str", PayCommonUtil.getRandomString(32));
parameterMap.put("body", description);
parameterMap.put("out_trade_no", trade_no);
parameterMap.put("fee_type", "CNY");
BigDecimal total = totalAmount.multiply(new BigDecimal(100));
//parameterMap.put("total_fee", total.intValue()+"");
parameterMap.put("total_fee", 1+"");
parameterMap.put("spbill_create_ip", pd.get("spbillCreateIp"));
parameterMap.put("notify_url", WXProperty.get("notify_url"));
parameterMap.put("trade_type", "APP");
parameterMap.put("sign_type", "MD5");
parameterMap.put("attach", pd.get("ORDERTYPE"));//附加数据
String sign = PayCommonUtil.createSign("UTF-8", parameterMap) ;
parameterMap.put("sign", sign);
String requestXML = PayCommonUtil.getRequestXml(parameterMap);
System.out.println("【转换为xml格式的参数】 "+requestXML);
String resultXML = PayCommonUtil.httpsRequest(
"https://api.mch.weixin.qq.com/pay/unifiedorder","POST", requestXML);
System.out.println("【返回的XML】 " + resultXML);
Map mapResult = PayCommonUtil.doXMLParse(resultXML);
String returnCode = (String) mapResult.get("return_code");
System.out.println("【返回内容 】 "+returnCode);
if("SUCCESS".equals(returnCode)){
String resultCode = (String) mapResult.get("result_code");
if("SUCCESS".equals(resultCode)){
String prepay_id = (String) mapResult.get("prepay_id");
SortedMap<String, Object> finalpackage = new TreeMap<String, Object>();
finalpackage.put("appid", WXProperty.get("APP_ID"));
finalpackage.put("partnerid", WXProperty.get("MCH_ID"));
finalpackage.put("prepayid", prepay_id);
String noncestr = PayCommonUtil.getRandomString(32);
finalpackage.put("noncestr", noncestr);
String timestamp = String.valueOf(System.currentTimeMillis() / 1000);
finalpackage.put("timestamp", timestamp);
finalpackage.put("package", "Sign=WXPay");
sign = PayCommonUtil.createSign("UTF-8", finalpackage) ;
SortedMap<String, Object> returnmap = new TreeMap<String, Object>();
returnmap.put("appid", WXProperty.get("APP_ID"));
returnmap.put("partnerId", WXProperty.get("MCH_ID"));
returnmap.put("prepayId", prepay_id);
returnmap.put("nonceStr", noncestr);
returnmap.put("timeStamp", timestamp);
returnmap.put("package", "Sign=WXPay");
returnmap.put("sign", sign);
return returnmap;
}else{
String errCodeDes = (String) mapResult.get("err_code_des");
returnMap.put("errCodeDes", errCodeDes);
}
}else{
String returnMsg = (String) mapResult.get("return_msg");
returnMap.put("returnMsg", returnMsg);
}
return null;
}
微信支付回调地址：
@RequestMapping(value = "/success")
public String wxpaySucc(HttpServletRequest request){
logger.info("微信支付回调"); //商户处理后同步返回给微信参数：
String xmlResultSuccess = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>" + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
String xmlResultFailure = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>" + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> "; SortedMap<String, Object> params = null;
try {
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);
}
String resultxml = new String(outSteam.toByteArray(), "utf-8");
params = PayCommonUtil.doXMLParse(resultxml);
logger.info("微信回调的信息:解析XML得到key:value");
for (Object b : params.keySet()) {
logger.info("key="+b+":"+"value="+params.get(b));
}
outSteam.close();
inStream.close();
} catch (Exception e) {
e.printStackTrace();
logger.info("回调xml解析失败");
}
//验证签名
boolean signVerified = PayCommonUtil.checkWXSign(params);
logger.info("验证签名:"+signVerified);
if (!signVerified) {
// 支付失败，失败业务逻辑处理
//将订单状态设置为待支付 return xmlResultFailure;
} else {
String return_code = (String) params.get("return_code");//状态
String out_trade_no = (String) params.get("out_trade_no");//订单号
String ORDERTYPE = (String) params.get("attach");//商家数据包
System.out.println("订单号out_trade_no:"+out_trade_no); //防止微信重复通知
PageData pd = new PageData();
pd.put("ORDERNUMBER", out_trade_no);
try {
PageData payInfo = alipayInService.getPayInfo(pd);
if(payInfo != null){
return xmlResultSuccess;
}
} catch (Exception e1) {
e1.printStackTrace();
} if (return_code.equals("SUCCESS")) {
if (out_trade_no != null) {
//付款成功业务逻辑处理
return xmlResultSuccess;
default:
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}else{
logger.info("微信手机支付回调失败订单号:{}"+out_trade_no);
return xmlResultFailure;
}
}
return null;
}
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