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Java微信支付之服务号支付实现，网上的java微信支付sdk和Demo基本上是水的，看着头疼所以我决心自己开始写Java微信支付之公众号支付，多的不说见下面源码，为了方便使用我分别用了两个Servlet，一个是统一下单UnifiedorderServlet，一个是支付回调PayCallBackServlet，你们可以自己封装。
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一是统一下单UnifiedorderServlet:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONML;
import org.json.JSONObject;
public class UnifiedorderServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final String appid = "";// 找微信
private static final String mch_id = "";// 找微信
public static final String api_key = "";// 找微信
private static final String trade_type = "JSAPI";// 写死
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
JSONObject jso = new JSONObject();
double money = 0.01;
String openId = "", out_trade_no = "", body = "测试", ip = "";
try {
out.print(execute(out_trade_no, body, openId, money, ip, jso).toString());
} catch (JSONException e) {
e.printStackTrace();
}
out.flush();
out.close();
}
/**
* 微信服务号统一下单支付
*
* @param out_trade_no
* 订单号
* @param body
* 标题
* @param openId
* 用户的openId
* @param money
* 支付金额
* @param ip
* 客户端ip
* @param request
* HttpServletRequest
* @return
* @throws JSONException
*/
public JSONObject execute(String out_trade_no, String body, String openId, double money, String ip, JSONObject jso) throws JSONException {
StringBuilder xml = new StringBuilder();
String notify_url = "https://test.com/payCallBack";// 支付回调地址
String prepay_id = "", sign = "", charset = "UTF-8", nonce_str = "";
try {
String weixinMoney = new java.text.DecimalFormat("#").format(money * 100);// 微信是以分为单位的所以要乘以100
nonce_str = getRandomString(32);
xml.append("appid=").append(appid).append("&body=").append(new String(body.getBytes(charset), charset));// 处理中文
xml.append("&mch_id=").append(mch_id).append("&nonce_str=").append(nonce_str);
xml.append("¬ify_url=").append(notify_url).append("&openid=").append(openId);
xml.append("&out_trade_no=").append(out_trade_no).append("&spbill_create_ip=").append(ip);
xml.append("&total_fee=").append(weixinMoney).append("&trade_type=").append(trade_type).append("&key=").append(api_key);
sign = MD5Purity(xml.toString());
// System.out.println(xml);
xml.delete(0, xml.length());
xml.append("");
xml.append(" ").append(appid).append("");
xml.append("").append(body).append("");
xml.append(" ").append(mch_id).append(" ");
xml.append(" ").append(nonce_str).append(" ");
xml.append(" ").append(openId).append(" ");
xml.append(" ").append(notify_url).append(" ");
xml.append(" ").append(out_trade_no).append(" ");
xml.append(" ").append(ip).append(" ");
xml.append(" ").append(weixinMoney).append(" ");
xml.append(" ").append(trade_type).append(" ");
xml.append(" ").append(sign).append(" ");
xml.append(" ");
HttpURLConnection conn = (HttpURLConnection) new URL("https://api.mch.weixin.qq.com/pay/unifiedorder").openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "text/xml");
conn.setRequestProperty("Charset", charset);
OutputStream os = conn.getOutputStream();
os.write(xml.toString().getBytes(charset));
xml.delete(0, xml.length());
os.close();
int responseCode = conn.getResponseCode();
InputStreamReader in = null;
BufferedReader br = null;
if (responseCode == 200) {
in = new InputStreamReader(conn.getInputStream(), charset);
br = new BufferedReader(in);
String retData = null;
while ((retData = br.readLine()) != null)
xml.append(retData);
JSONArray childNodes = JSONML.toJSONObject(xml.toString()).getJSONArray("childNodes");
int len = childNodes.length() - 1;
for (int i = len; i > -1; i--) {
JSONObject js = childNodes.getJSONObject(i);
if (js.get("tagName").equals("prepay_id")) {
prepay_id = js.getJSONArray("childNodes").getString(0);
break;
}
}
}
if (in != null)
in.close();
if (br != null)
br.close();
conn.disconnect();
// ----------------------------------给h6返回的数据
String timeStamp = System.currentTimeMillis() + "";
timeStamp = timeStamp.substring(0, 10);// 微信只要精确到秒
nonce_str = getRandomString(32);
jso.put("appId", appid);
jso.put("nonceStr", nonce_str);
jso.put("package", "prepay_id=" + prepay_id);
jso.put("signType", "MD5");
jso.put("timeStamp", timeStamp);
xml.delete(0, xml.length());
xml.append("appId=").append(appid);
xml.append("&nonceStr=").append(nonce_str);
xml.append("&package=").append(jso.getString("package"));
xml.append("&signType=").append(jso.getString("signType"));
xml.append("&timeStamp=").append(timeStamp);
xml.append("&key=").append(api_key);
sign = MD5Purity(new String(xml.toString().getBytes(charset), charset));
jso.put("paySign", sign);
//返回的数据主要用在这地方 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6
// ----------------------------------给h6返回的数据
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return jso;
}
/**
* MD5
*
* @param plainText
* @return
*/
public String MD5Purity(String plainText) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(plainText.getBytes("utf-8"));
byte b[] = md.digest();
int i;
StringBuffer buf = new StringBuffer("");
for (int offset = 0; offset < b.length; offset++) {
i = b[offset];
if (i < 0)
i += 256;
if (i < 16)
buf.append("0");
buf.append(Integer.toHexString(i));
}
plainText = buf.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return plainText.toUpperCase();
}
/**
* 生成一个随机字符串
*
* @param length
* 表示生成字符串的长度
* @return
*/
private String getRandomString(int length) {
String base = "abcdefghijklmnopqrstuvwxyz0123456789";
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();
}
}二是支付回调PayCallBackServlet:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONML;
import org.json.JSONObject;
public class PayCallBackServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
out.print(doWxServer(request));
out.flush();
out.close();
}
/**
* 处理微信回调
*
* @param request
* @return
* @throws ServletException
* @throws IOException
*/
public String doWxServer(HttpServletRequest request) {
System.out.println("微信服务号支付回调");
String inputLine;
StringBuilder notityXml = new StringBuilder();
BufferedReader bufferedReader = null;
try {
bufferedReader = request.getReader();
while ((inputLine = bufferedReader.readLine()) != null)
notityXml.append(inputLine);
if (bufferedReader != null)
bufferedReader.close();
if (notityXml.length() < 10) {
return "fail";
}
String appid = "", total_fee = "", bank_type = "", cash_fee = "", fee_type = "", is_subscribe = "", mch_id = "", nonce_str = "";
String out_trade_no = "", transaction_id = "", openid = "", sign = "", result_code = "", return_code = "", time_end = "", trade_type = "";
JSONArray result = JSONML.toJSONObject(notityXml.toString()).getJSONArray("childNodes");
int len = result.length();
for (int i = 0; i < len; i++) {
JSONObject js = result.getJSONObject(i);
Object tagName = js.get("tagName");
if (tagName.equals("appid")) {
appid = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("bank_type")) {
bank_type = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("cash_fee")) {
cash_fee = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("fee_type")) {
fee_type = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("is_subscribe")) {
is_subscribe = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("mch_id")) {
mch_id = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("nonce_str")) {
nonce_str = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("openid")) {
openid = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("out_trade_no")) {
out_trade_no = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("result_code")) {
result_code = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("return_code")) {
return_code = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("time_end")) {
time_end = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("total_fee")) {
total_fee = js.getJSONArray("childNodes").getInt(0) + "";
} else if (tagName.equals("trade_type")) {
trade_type = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("transaction_id")) {
transaction_id = js.getJSONArray("childNodes").getString(0);
} else if (tagName.equals("sign")) {
sign = js.getJSONArray("childNodes").getString(0);
}
}
StringBuilder str = new StringBuilder();
str.append("appid=").append(appid).append("&bank_type=").append(bank_type).append("&cash_fee=").append(cash_fee).append("&fee_type=");
str.append(fee_type).append("&is_subscribe=").append(is_subscribe).append("&mch_id=").append(mch_id).append("&nonce_str=");
str.append(nonce_str).append("&openid=").append(openid).append("&out_trade_no=").append(out_trade_no).append("&result_code=").append(result_code)
.append("&return_code=").append(return_code).append("&time_end=").append(time_end).append("&total_fee=").append(total_fee);
str.append("&trade_type=").append(trade_type).append("&transaction_id=").append(transaction_id).append("&key=").append(UnifiedorderServlet.api_key);
if (!MD5Purity(str.toString()).equals(sign)) {// 验证签名
System.out.println("微信服务号支付回调签名异常sign=" + sign);
System.out.println(str);
System.out.println(result);
return "fail";
}
total_fee = new java.text.DecimalFormat("#0.00").format(Double.parseDouble(total_fee) / 100);// 支付金额以分为单位
return "大功告成
总结
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