android微信支付总结+自己搭建服务器

1.前期注册操作
　　1-1：微信开发平台：https://open.weixin.qq.com/
　　1-2：创建移动应用
　　　　签名获取：
　　　　　　1.将自己的apk签名打包，运行到手机上。
　　　　　　2.将微信支付的签名工具，运行到手机上。
　　　　　　3.通过签名工具，获取签名。

2.android端初始化
　　2-1：签名配置

        signingConfigs {
            debug{
                storeFile file("f:/style.keystore")
                storePassword "13873129725"
                keyAlias "style"
                keyPassword "13873129725"
            }
            release {
                storeFile file("f:/style.keystore")
                storePassword "13873129725"
                keyAlias "style"
                keyPassword "13873129725"
            }
        }

　　2-2：权限

        <uses-permission android:name="android.permission.INTERNET" />
        <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
        <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

　　2-3：支付按钮

        <Button
            android:id="@+id/appay_btn"
            android:background="@drawable/btn_style_one"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textColor="#fff"
            android:textSize="20sp"
            android:text="开始支付" />

　　　　按钮点击样式：

            <selector xmlns:android="http://schemas.android.com/apk/res/android">
                <item android:state_pressed="true" android:drawable="@drawable/btn_style_one_pressed" />
                <item  android:drawable="@drawable/btn_style_one_normal" />
            </selector>

　　2-4：导入jar包
　　2-5：调用微信支付的代码

        Button appayBtn;
        private IWXAPI api;
        api = WXAPIFactory.createWXAPI(this, Constant.OPEN_ID);
        appayBtn = (Button) findViewById(R.id.appay_btn);
        appayBtn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
//                String url = "http://139.196.196.64:8080/PayServer/mypay.jsp";
                String name = null;
                try {
                    name = URLEncoder.encode("你好","utf-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                String url = "http://172.16.46.114:8080/Pay/pay.jsp?goodsName="+name+"&price=11";
                Toast.makeText(MainActivity.this, "获取订单中...", Toast.LENGTH_SHORT).show();
                HttpUtil.get(url, new HttpUtil.CallBack() {
                    @Override
                    public void onSuccess(String content) {
                        try {
                            Log.e("get server pay params:", content);
                            if (content != null) {
                                JSONObject json = new JSONObject(content);
                                if (null != json && !json.has("retcode")) {
                                    PayReq req = new PayReq();
                                    req.appId = json.getString("appid");
                                    req.partnerId = json.getString("partnerid");
                                    req.prepayId = json.getString("prepayid");
                                    req.nonceStr = json.getString("noncestr");
                                    req.timeStamp = json.getString("timestamp");
                                    req.packageValue = json.getString("package");
                                    req.sign = json.getString("sign");
                                    req.extData = "app data"; // optional
                                    Toast.makeText(MainActivity.this, "正常调起支付", Toast.LENGTH_SHORT).show();
                                    api.sendReq(req);
                                } else {
                                    Log.d("PAY_GET", "返回错误" + json.getString("retmsg"));
                                    Toast.makeText(MainActivity.this, "返回错误" + json.getString("retmsg"), Toast.LENGTH_SHORT).show();
                                }
                            } else {
                                Log.d("PAY_GET", "服务器请求错误");
                                Toast.makeText(MainActivity.this, "服务器请求错误", Toast.LENGTH_SHORT).show();
                            }
                        } catch (Exception e) {
                            Log.e("PAY_GET", "异常：" + e.getMessage());
                            Toast.makeText(MainActivity.this, "异常：" + e.getMessage(), Toast.LENGTH_SHORT).show();
                        }
                        appayBtn.setEnabled(true);
                    }

                    @Override
                    public void onError(Throwable e) {
                        Toast.makeText(MainActivity.this, "网络连接失败", Toast.LENGTH_SHORT).show();
                        appayBtn.setEnabled(true);
                    }
                });
            }
        });

3.微信支付服务器搭建
　　3-1:jsp页面

        <%
            //得到输入的商品名称和价格
            String goodsName = request.getParameter("goodsName");
            String price = request.getParameter("price");

            if (goodsName == null || goodsName.trim().equals("")) {
                out.print("商品名不能为空");
            }
            if (price == null || price.trim().equals("")) {
                out.print("商品价格不能为空");
            }
            int goodsPrice = Integer.parseInt(price);

            //把相关参数传给微信支付
            TreeMap<String, Object> map = new TreeMap<String, Object>();
            map.put("appid", Constant.OPEN_ID);
            map.put("mch_id", Constant.SW_ID);
            map.put("nonce_str", Utils.getRandomStr());
            map.put("body", goodsName);
            map.put("out_trade_no", Utils.getRandomStr());
            map.put("total_fee", goodsPrice);
            map.put("spbill_create_ip", request.getLocalAddr());
            map.put("notify_url",
                    "http://139.196.196.64:8080/PayServer/mypay.jsp");
            map.put("trade_type", "APP");
            map.put("sign", Utils.getSignStr(map));
            
            //把map转换成xml，并发送到微信支付接口
            String info = Utils.map2xml(map);
            String i = getHttpData.sendMsg(Constant.ORDER, info);

            //接收它的返回信息
            Map<String, Object> returnMap = Utils.xml2Map(i);
            //返回的键要相对应，所以要改过来
            TreeMap<String, Object> resultmap = new TreeMap<String, Object>();
            resultmap.put("appid", Constant.OPEN_ID);
            resultmap.put("partnerid", Constant.SW_ID);
            resultmap.put("prepayid",returnMap.get("prepay_id"));
            resultmap.put("noncestr",returnMap.get("nonce_str"));
            resultmap.put("timestamp",Utils.getDataStr("yyyyMMddHH"));
            resultmap.put("package","WXPay");
            resultmap.put("sign",Utils.getSignStr(resultmap));

            String inf = JSON.toJSONString(resultmap);
            out.print(inf);
        %>

　　3-2：常用方法 Utils.java

        package com.firefly.common;

        import java.io.ByteArrayInputStream;
        import java.text.SimpleDateFormat;
        import java.util.Date;
        import java.util.HashMap;
        import java.util.Map;
        import java.util.Random;
        import java.util.Set;
        import java.util.TreeMap;

        import javax.xml.parsers.DocumentBuilder;
        import javax.xml.parsers.DocumentBuilderFactory;

        import org.w3c.dom.Document;
        import org.w3c.dom.Element;
        import org.w3c.dom.Node;
        import org.w3c.dom.NodeList;

        public class Utils {

            // 得到32位随机数
            public static String getRandomStr() {
                StringBuffer sb = new StringBuffer();
                Random r = new Random();
                String str = "QWERTYUIOPASDFGHJKLZXCVBNM0123456789";
                for (int i = 0; i < 32; i++) {
                    sb.append(str.charAt(r.nextInt(str.length())));
                }
                return sb.toString();
            }

            // 得到sign
            public static String getSignStr(TreeMap<String, Object> map) {
                String info = "";
                Set<String> keySet = map.keySet();
                for (String string : keySet) {
                    info += string + "=" + map.get(string) + "&";
                }
                info += "key=" + Constant.API_KEY;
                return MD5.MD5Encode(info).toUpperCase();
            }

            // 得到日期
            public static String getDataStr(String type) {
                Date date = new Date();
                SimpleDateFormat format = new SimpleDateFormat(type);
                return format.format(date);
            }

            // 转换为xml
            public static String map2xml(TreeMap<String, Object> map) {
                String info = "<?xml version="1.0" encoding="UTF-8"?>";
                info += "<xml>";
                Set<String> keySet = map.keySet();
                for (String string : keySet) {
                    info += "<" + string + ">" + map.get(string) + "</" + string + ">";
                }
                info += "</xml>";
                return info;
            }

            public static Map<String, Object> xml2Map(String xmlStr) {
                Map<String, Object> map = null;
                try {
                    DocumentBuilderFactory factory = DocumentBuilderFactory
                            .newInstance();
                    DocumentBuilder builder = factory.newDocumentBuilder();
                    // 将字符串转换成流
                    ByteArrayInputStream bis = new ByteArrayInputStream(xmlStr
                            .getBytes());
                    Document doc = builder.parse(bis);
                    Node root = doc.getFirstChild();// 根节点
                    NodeList nodeList = root.getChildNodes();
                    map = new HashMap<String, Object>();

                    for (int i = 0; i < nodeList.getLength(); i++) {
                        Node child = nodeList.item(i);
                        if (child instanceof Element) {
                            Element e = (Element) child;
                            map.put(e.getNodeName(), e.getTextContent());
                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return map;
            }

            // 测试
            public static void main(String[] args) {

                // System.out.println("随机："+Utils.getRandomStr());
                TreeMap<String, Object> ma = new TreeMap<String, Object>();
                ma.put("appid", "wefoi");
                ma.put("eei", "20934jf");
                System.out.println(Utils.map2xml(ma));
                // System.out.println(getDataStr("yyyyMMddHH"));

            }
        }