java 微信APP支付代码

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import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.Random;import org.apache.http.ParseException;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import org.json.JSONArray;import org.json.JSONML;import org.json.JSONObject;public class Test {private static final String appid = "wx0378bf81abfe3d26";//自己设置private static final int mch_id = 1252196606;//自己设置private static final String api_key = "b8b9c2bbe92d57cc38fde49745056167";//自己设置private static final String notify_url = "http://www.xxx.com/weixin_notify_url.jsp";//自己设置private static final String trade_type = "APP";//public static void main(String[] args) {postToWeChat("5455545", "test", 0.01);postToWeChat("5455545", "中文", 0.01);//会失败}/** * 提交到微信 *  * @param out_trade_no *            自己系统的订单号 * @param body *            标题 * @param money *            金额 * @return */private static JSONObject postToWeChat(String out_trade_no, String body, double money) {StringBuilder xml = new StringBuilder();String nonce_str = getRandomString(32);String ip = "127.0.0.1";// 客户端IP自己处理JSONObject jso = new JSONObject();String prepay_id = "", sign = "";try {String weixinMoney = new java.text.DecimalFormat("#").format(money * 100);// 微信是以分为单位的所以要乘以100xml.append("appid=").append(appid).append("&body=").append(new String(body.getBytes("UTF-8"), "utf-8"));xml.append("&mch_id=").append(mch_id).append("&nonce_str=").append(nonce_str);xml.append("¬ify_url=").append(notify_url).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 = new Util().MD5Purity(xml.toString()).toUpperCase();// MD5加密签名加密类自己解决就不放上来了xml.delete(0, xml.length());xml.append("<xml>");xml.append("   <appid>").append(appid).append("</appid>");xml.append("   <body>").append(body).append("</body>");xml.append("   <mch_id>").append(mch_id).append("</mch_id>");xml.append("   <nonce_str>").append(nonce_str).append("</nonce_str>");xml.append("   <notify_url>").append(notify_url).append("</notify_url>");xml.append("   <out_trade_no>").append(out_trade_no).append("</out_trade_no>");xml.append("   <spbill_create_ip>").append(ip).append("</spbill_create_ip>");xml.append("   <total_fee>").append(weixinMoney).append("</total_fee>");xml.append("   <trade_type>").append(trade_type).append("</trade_type>");xml.append("   <sign>").append(sign).append("</sign>");xml.append("</xml>");HttpPost post = new HttpPost("https://api.mch.weixin.qq.com/pay/unifiedorder");StringEntity entity = new StringEntity(xml.toString(), "UTF-8");entity.setContentEncoding("utf-8");entity.setContentType("text/xml");post.setEntity(entity);JSONArray childNodes = JSONML.toJSONObject(EntityUtils.toString(new DefaultHttpClient().execute(post).getEntity(), "utf-8")).getJSONArray("childNodes");System.out.println(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;}}} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ParseException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}jso.put("sign", sign);jso.put("appid", appid);jso.put("noncestr", nonce_str);jso.put("package", "Sign=WXPay");jso.put("partnerid", mch_id);jso.put("prepayid", prepay_id);jso.put("timestamp", System.currentTimeMillis());return jso;}/** * 表示生成字符串的长度 *  * @param length * @return */private static 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();}}
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