####一、描述
这里说明一下支付宝和微信的支付流程
####二、微信
封装工具类
public class WXPayUtils {
private IWXAPI iwxapi; //微信支付api
private WXPayBuilder builder;
private WXPayUtils(WXPayBuilder builder) {
this.builder = builder;
}
/**
* 调起微信支付的方法,不需要在客户端签名
**/
public void toWXPayNotSign(Context context, String appid) {
iwxapi = WXAPIFactory.createWXAPI(context, null); //初始化微信api
iwxapi.registerApp(appid); //注册appid appid可以在开发平台获取
Runnable payRunnable = new Runnable() { //这里注意要放在子线程
@Override
public void run() {
PayReq request = new PayReq(); //调起微信APP的对象
//下面是设置必要的参数，也就是前面说的参数,这几个参数从何而来请看上面说明
request.appId = builder.getAppId();
request.partnerId = builder.getPartnerId();
request.prepayId = builder.getPrepayId();
request.packageValue = "Sign=WXPay";
request.nonceStr = builder.getNonceStr();
request.timeStamp = builder.getTimeStamp();
request.sign = builder.getSign();
Log.e("chx", "run: " + request.appId + request.nonceStr + request.sign);
iwxapi.sendReq(request);//发送调起微信的请求
}
};
Thread payThread = new Thread(payRunnable);
payThread.start();
}
/**
* 调起微信支付的方法,需要在客户端签名
**/
public void toWXPayAndSign(Context context, String appid,final String key) {
iwxapi = WXAPIFactory.createWXAPI(context, null); //初始化微信api
iwxapi.registerApp(appid); //注册appid appid可以在开发平台获取
Runnable payRunnable = new Runnable() { //这里注意要放在子线程
@Override
public void run() {
if (TextUtils.isEmpty(builder.getAppId())
||TextUtils.isEmpty(builder.getPartnerId())
||TextUtils.isEmpty(builder.getPrepayId())){
Log.e("chx", "toWXPayAndSign: "+"必须在builder中设置appId、PartnerId、PrepayId");
return;
}
PayReq request = new PayReq(); //调起微信APP的对象
//下面是设置必要的参数，也就是前面说的参数,这几个参数从何而来请看上面说明
request.appId = builder.getAppId();
request.partnerId = builder.getPartnerId();
request.prepayId = builder.getPrepayId();
request.packageValue = "Sign=WXPay";
request.nonceStr = genNonceStr();
request.timeStamp = String.valueOf(genTimeStamp());
request.sign = builder.getSign();
//签名
LinkedHashMap<String, String> signParams = new LinkedHashMap<>();
signParams.put("appid", request.appId);
signParams.put("noncestr", request.nonceStr);
signParams.put("package", request.packageValue);
signParams.put("partnerid", request.partnerId);
signParams.put("prepayid", request.prepayId);
signParams.put("timestamp", request.timeStamp);
request.sign = genPackageSign(signParams,key);
iwxapi.sendReq(request);//发送调起微信的请求
}
};
Thread payThread = new Thread(payRunnable);
payThread.start();
}
/**
* 调起微信APP支付，签名
* 生成签名
*/
private String genPackageSign(LinkedHashMap<String, String> params,String key) {
StringBuilder sb = new StringBuilder();
for (Map.Entry<String,String> entry: params.entrySet()) {
sb.append(entry.getKey());
sb.append('=');
sb.append(entry.getValue());
sb.append('&');
}
sb.append("key=");
sb.append(key);
String packageSign = getMessageDigest(sb.toString().getBytes()).toUpperCase();
return packageSign;
}
/**
* md5加密
* @param buffer
* @return
*/
private String getMessageDigest(byte[] buffer) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
try {
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(buffer);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
return null;
}
}
/**
* 获取随机数
*
* @return
*/
private String genNonceStr() {
Random random = new Random();
return getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
}
/**
* 获取时间戳
*
* @return
*/
private long genTimeStamp() {
return System.currentTimeMillis() / 1000;
}
public static class WXPayBuilder {
public String appId;
public String partnerId;
public String prepayId;
public String packageValue;
public String nonceStr;
public String timeStamp;
public String sign;
public WXPayUtils build() {
return new WXPayUtils(this);
}
public String getAppId() {
return appId;
}
public WXPayBuilder setAppId(String appId) {
this.appId = appId;
return this;
}
public String getPartnerId() {
return partnerId;
}
public WXPayBuilder setPartnerId(String partnerId) {
this.partnerId = partnerId;
return this;
}
public String getPrepayId() {
return prepayId;
}
public WXPayBuilder setPrepayId(String prepayId) {
this.prepayId = prepayId;
return this;
}
public String getPackageValue() {
return packageValue;
}
public WXPayBuilder setPackageValue(String packageValue) {
this.packageValue = packageValue;
return this;
}
public String getNonceStr() {
return nonceStr;
}
public WXPayBuilder setNonceStr(String nonceStr) {
this.nonceStr = nonceStr;
return this;
}
public String getTimeStamp() {
return timeStamp;
}
public WXPayBuilder setTimeStamp(String timeStamp) {
this.timeStamp = timeStamp;
return this;
}
public String getSign() {
return sign;
}
public WXPayBuilder setSign(String sign) {
this.sign = sign;
return this;
}
}
}
使用示例：
//在服务端签名
findViewById(R.id.btn1).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//假装请求了服务器 获取到了所有的数据
WXPayUtils.WXPayBuilder builder = new WXPayUtils.WXPayBuilder();
builder.setAppId("123")
.setPartnerId("56465")
.setPrepayId("41515")
.setPackageValue("5153")
.setNonceStr("5645")
.setTimeStamp("56512")
.setSign("54615")
.build().toWXPayNotSign(MainActivity.this,"123");
}
});
//在客户端签名
findViewById(R.id.btn2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//假装请求了服务端信息，并获取了appid、partnerId、prepayId
WXPayUtils.WXPayBuilder builder = new WXPayUtils.WXPayBuilder();
builder.setAppId("123")
.setPartnerId("213")
.setPrepayId("3213")
.setPackageValue("Sign=WXPay")
.build()
.toWXPayAndSign(MainActivity.this,"123","key");
}
});
