本文实例为大家分享了java微信APP支付代码，供大家参考，具体内容如下
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();
}
}
以上就是本文的全部内容，希望对大家学习java程序设计有所帮助。