Java开发SSM框架微信支付的实现

public class configure {

   //商户支付密钥

   private static string key = "****************************" ;

   //小程序id

   private static string appid = "***************" ;

   //商户号

   private static string mch_id = "*********" ;

   //小程序密钥

   private static string secret = "********************" ;

protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {

     string code = request.getparameter( "code" );

     httpget httpget = new httpget( "https://api.weixin.qq.com/sns/jscode2session?appid=" +configure.getappid()+ "&secret=" +configure.getsecret()+ "&js_code=" +code+ "&grant_type=authorization_code" );

         //设置请求器的配置

     httpclient httpclient = httpclients.createdefault();

     httpresponse res = httpclient.execute(httpget);

     httpentity entity = res.getentity();

     string result = entityutils.tostring(entity, "utf-8" );

     response.getwriter().append(result);

   }

string openid = request.getparameter( "openid" );

int totalfee=integer.parseint(request.getparameter( "totalfee" )); //获取支付金额

string out_trade_no=randomstringgenerator.getrandomstringbylength( 32 ); //商户订单号

orderinfo order = new orderinfo();

order.setappid(configure.getappid());

order.setmch_id(configure.getmch_id());

order.setnonce_str(randomstringgenerator.getrandomstringbylength( 32 ));

order.setbody( "测试" );

order.setout_trade_no(out_trade_no);

order.settotal_fee(totalfee);

order.setspbill_create_ip( "***.***.***.**" );

order.setnotify_url( "https://www.see-source.com/weixinpay/payresult" );

order.settrade_type( "jsapi" );

order.setopenid(openid);

order.setsign_type( "md5" );

try {

       string repay_id = request.getparameter( "repay_id" );

       signinfo signinfo = new signinfo();

       signinfo.setappid(configure.getappid());

       long time = system.currenttimemillis()/ 1000 ;

       signinfo.settimestamp(string.valueof(time));

       signinfo.setnoncestr(randomstringgenerator.getrandomstringbylength( 32 ));

       signinfo.setrepay_id( "prepay_id=" +repay_id);

       signinfo.setsigntype( "md5" );

       //生成签名

       string sign = signature.getsign(signinfo);

       jsonobject json = new jsonobject();

       json.put( "timestamp" , signinfo.gettimestamp());

       json.put( "noncestr" , signinfo.getnoncestr());

       json.put( "package" , signinfo.getrepay_id());

       json.put( "signtype" , signinfo.getsigntype());

       json.put( "paysign" , sign);

       l.info( "-------再签名:" +json.tojsonstring());

       response.getwriter().append(json.tojsonstring());

     } catch (exception e) {

       // todo auto-generated catch block

       e.printstacktrace();

       l.error( "-------" , e);

     }

public static string getsign(object o) throws illegalaccessexception {

     arraylist<string> list = new arraylist<string>();

     @suppresswarnings ( "rawtypes" )

     class cls = o.getclass();

     field[] fields = cls.getdeclaredfields();

     for (field f : fields) {

       f.setaccessible( true );

       if (f.get(o) != null && f.get(o) != "" ) {

         string name = f.getname();

         xstreamalias anno = f.getannotation(xstreamalias. class );

         if (anno != null )

           name = anno.value();

         list.add(name + "=" + f.get(o) + "&" );

       }

     }

     int size = list.size();

     string [] arraytosort = list.toarray( new string[size]);

     arrays.sort(arraytosort, string.case_insensitive_order);

     stringbuilder sb = new stringbuilder();

     for ( int i = 0 ; i < size; i ++) {

       sb.append(arraytosort[i]);

     }

     string result = sb.tostring();

     result += "key=" + configure.getkey();

     system.out.println( "签名数据：" +result);

     result = md5util.md5encode(result, "utf-8" ).touppercase();

     return result;

   }