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";//自己設(shè)置
 private static final int mch_id = 1252196606;//自己設(shè)置
 private static final String api_key = "b8b9c2bbe92d57cc38fde49745056167";//自己設(shè)置
 private static final String notify_url = "http://www.xxx.com/weixin_notify_url.jsp";//自己設(shè)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);//會(huì)失敗
 }

 /**
 * 提交到微信
 * 
 * @param out_trade_no
 *   自己系統(tǒng)的訂單號(hào)
 * @param body
 *   標(biāo)題
 * @param money
 *   金額
 * @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";// 客戶(hù)端IP自己處理
 JSONObject jso = new JSONObject();
 String prepay_id = "", sign = "";
 try {
 String weixinMoney = new java.text.DecimalFormat("#").format(money * 100);// 微信是以分為單位的所以要乘以100
 xml.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加密簽名加密類(lèi)自己解決就不放上來(lái)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;
 }

 /**
 * 表示生成字符串的長(zhǎng)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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