Android在线支付

package com.example.PayServlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.gson.Gson;
import com.pingplusplus.Pingpp;
import com.pingplusplus.exception.PingppException;
import com.pingplusplus.model.Charge;

/**
 * Servlet implementation class PayServlet
 */
@WebServlet("/PayServlet")
public class PayServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    public PayServlet() {
        super();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        response.setContentType("application/json;charset=UTF-8");

        // apiKey在ping++主页的账户和设置里面有
        Pingpp.apiKey = "sk_test_yzvDa99GqTeLanvvbDOy9qrT";

        // 获取客户端参数
        ServletInputStream in = request.getInputStream();
        byte[] bytes = new byte[512];
        int len = -1;
        StringBuffer sb = new StringBuffer();
        while ((len = in.read(bytes)) != -1) {
            sb.append(new String(bytes, 0, len));
        }

        Gson gson = new Gson();
        PaymentRequest pay = gson.fromJson(sb.toString(), PaymentRequest.class);

        // 获得 charge
        Map<String, Object> chargeMap = new HashMap<String, Object>();
        // 某些渠道需要添加extra参数，具体参数详见接口文档
        chargeMap.put("amount", pay.amount);
        chargeMap.put("currency", "cny");
        chargeMap.put("subject", "购买一款时髦的手表");// 商品名称
        chargeMap.put("body", "瑞士名表");
        chargeMap.put("order_no", "1234567890");//每次测试都要修改这里的order_no
        chargeMap.put("channel", pay.channel);
        chargeMap.put("client_ip", request.getRemoteAddr());
        Map<String, String> app = new HashMap<String, String>();
        app.put("id", "app_qTenzP0CO4CGirvL");// 应用ID
        chargeMap.put("app", app);
        try {
            // 发起交易请求
            Charge charge = Charge.create(chargeMap);
            // 向客户端发送消息
            PrintWriter pw = response.getWriter();
            pw.write(charge.toString());
        } catch (PingppException e) {
            e.printStackTrace();
        }
    }

    //这个class要放在这个Java文件里，不然会报错classNotDefException。原因不明
    //调试了好久
    class PaymentRequest {
        String channel;// 支付渠道
        int amount;// 价钱

        public PaymentRequest(String channel, int amount) {
            this.channel = channel;
            this.amount = amount;
        }
    }
}

package com.example.ping;

import java.io.IOException;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import com.google.gson.Gson;
import com.pingplusplus.android.PaymentActivity;
import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;

public class MainActivity extends Activity implements OnClickListener {
    // 银联支付渠道
    private static final String CHANNEL_UPACP = "upacp";

    private static final int REQUEST_CODE_PAYMENT = 1;

    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button = (Button) findViewById(R.id.pay);
        button.setOnClickListener(this);
    }

    private String URL = "http://10.107.56.64:8080/PingXX/PayServlet";

    class PaymentTask extends AsyncTask<PaymentRequest, Void, String> {
        @Override
        protected void onPreExecute() {
            // 按键点击之后的禁用，防止重复点击
            button.setOnClickListener(null);
        }

        @Override
        protected String doInBackground(PaymentRequest... params) {
            PaymentRequest paymentRequest = params[0];
            String data = null;
            String json = new Gson().toJson(paymentRequest);
            try {
                // 向Your Ping++ Server SDK请求数据
                // URL服务器地址
                data = postJson(URL, json);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return data;
        }

        /**
         * 获得服务端的charge，调用ping++ sdk。
         */
        @Override
        protected void onPostExecute(String data) {
            if (null == data) {
                showMsg("请求出错", "请检查URL", "URL无法获取charge");
                return;
            }
            Log.d("charge", data);
            Intent intent = new Intent(MainActivity.this, PaymentActivity.class);
            intent.putExtra(PaymentActivity.EXTRA_CHARGE, data);
            startActivityForResult(intent, REQUEST_CODE_PAYMENT);
        }
    }

    private static String postJson(String url, String json) throws IOException {
        MediaType type = MediaType.parse("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(type, json);
        // 封装请求对象
        Request request = new Request.Builder().url(url).post(body).build();

        OkHttpClient client = new OkHttpClient();
        // 执行请求
        Response response = client.newCall(request).execute();
        // 返回请求结果
        return response.body().string();
    }

    /**
     * onActivityResult 获得支付结果，如果支付成功， 
     * 服务器会收到ping++ 服务器发送的异步通知。 最终支付成功根据异步通知为准
     */
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        button.setOnClickListener(this);

        // 支付页面返回处理
        if (requestCode == REQUEST_CODE_PAYMENT) {
            if (resultCode == Activity.RESULT_OK) {
                String result = data.getExtras().getString("pay_result");
                /*
                 * 处理返回值 "success" - payment succeed "fail" - payment failed
                 * "cancel" - user canceld "invalid" - payment plugin not
                 * installed
                 */
                String errorMsg = data.getExtras().getString("error_msg"); // 错误信息
                String extraMsg = data.getExtras().getString("extra_msg"); // 错误信息
                showMsg(result, errorMsg, extraMsg);
            }
        }
    }

    public void showMsg(String title, String msg1, String msg2) {
        String str = title;
        if (null != msg1 && msg1.length() != 0) {
            str += "\n" + msg1;
        }
        if (null != msg2 && msg2.length() != 0) {
            str += "\n" + msg2;
        }
        Builder builder = new Builder(MainActivity.this);
        builder.setMessage(str);
        builder.setTitle("提示");
        builder.setPositiveButton("OK", null);
        builder.create().show();
    }

    class PaymentRequest {
        String channel;// 支付渠道
        int amount;// 价钱

        public PaymentRequest(String channel, int amount) {
            this.channel = channel;
            this.amount = amount;
        }
    }

    @Override
    public void onClick(View v) {
        if (v.getId() == R.id.pay) {
            new PaymentTask().execute(new PaymentRequest(CHANNEL_UPACP, 100));
        }
    }
}