Java调用微信支付功能的方法示例代码

Java调用微信支付功能的方法示例代码

java 使用微信支付

前言百度搜了一下微信支付，都描述的不太好，于是乎打算自己写一个案例，希望以后拿来直接改造使用。

因为涉及二维码的前端显示，所以有前端的内容

一. 准备工作

APPID：绑定支付的APPID（必须配置）

MCHID：商户号（必须配置）

KEY：商户支付密钥，参考开户邮件设置（必须配置）

APPSECRET：公众帐号secert（仅jsAPI支付的时候需要配置）

我这个案例用的是尚硅谷一位老师提供的，这里不方便提供出来，需要大家自己找，或者公司提供

二. 构建项目架构

1.新建maven项目

2.导入依赖

org.springframework.boot

spring-boot-starter-parent

2.2.1.RELEASE

org.springframework.boot

spring-boot-starter-web

com.github.wxpay

wxpay-sdk

0.0.3

org.apache.httpcomponents

httpclient

org.springframework.boot

spring-boot-startCarPMfbgRXer-freemarker

依赖中需要注意的是我导入了微信提供的sdk，以及freemarker模板引擎

3.编写配置文件application.properties

# 服务端口

server.port=8081

# 微信开放平台 appid

wx.pay.app_id=

#商户号

wx.pay.partner=

#商户key

wx.pay.partnerkey=

#回调地址

wx.pay.notifyurl:

spring.freemarker.tempalte-loader-path=classpath:/templates

# 关闭缓存，及时刷新，上线生产环境需要修改为true

spring.freemarker.cache=false

spring.freemarker.charset=UTF-8

spring.freemarker.check-template-location=true

spring.freemarker.content-type=text/html

spring.freemarker.expose-request-attributes=true

spring.freemarker.expose-session-attributes=true

spring.freemarker.request-context-attribute=request

spring.freemarker.suffix=.ftl

spring.mvc.static-path-pattern: /static/**

4.编写启动类

@SpringBootApplication

@ComponentScan(basePackages = {"com.haiyang.wxpay"})

public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class, args);

}

}

5.创建常用包controller，service，impl，utils

6.创建两个CarPMfbgRX前端需要的文件夹 static和templates

三. 代码实现

1. 创建工具类读取配置文件的参数

@Component

public class WxPayUtils implements InitializingBean {

@Value("${wx.pay.app_id}")

private String appId;

@Value("${wx.pay.partner}")

private String partner;

@Value("${wx.pay.partnerkey}")

private String partnerKey;

@Value("${wx.pay.notifyurl}")

private String notifyUrl;

public static String WX_PAY_APP_ID;

public static String WX_PAY_PARTNER;

public static String WX_PAY_PARTNER_KEY;

public static String WX_OPEN_NOTIFY_URL;

@Override

public void afterPropertiesSet() throws Exception {

WX_PAY_APP_ID = appId;

WX_PAY_PARTNER = partner;

WX_PAY_PARTNER_KEY = partnerKey;

WX_OPEN_NOTIFY_URL = notifyUrl;

}

}

2. 构建工具类发送http请求

/**

* http请求客户端

*

* @author qy

*

*/

public class HttpClient {

private String url;

private Map param;

private int statusCode;

private String content;

private Stringhttp:// xmlParam;

private boolean isHttps;

public boolean isHttps() {

return isHttps;

}

public void setHttps(boolean isHttps) {

this.isHttps = isHttps;

}

public String getXmlParam() {

return xmlParam;

}

public void setXmlParam(String xmlParam) {

this.xmlParam = xmlParam;

}

public HttpClient(String url, Map param) {

this.url = url;

this.param = param;

}

public HttpClient(String url) {

this.url = url;

}

public void setParameter(Map map) {

param = map;

}

public void addParameter(String key, String value) {

if (param == null)

param = new HashMap();

param.put(key, value);

}

public void post() throws ClientProtocolException, IOException {

HttpPost http = new HttpPost(url);

setEntity(http);

execute(http);

}

public void put() throws ClientProtocolException, IOException {

HttpPut http = new HttpPut(url);

setEntity(http);

execute(http);

}

public void get() throws ClientProtocolException, IOException {

if (param != null) {

StringBuilder url = new StringBuilder(this.url);

boolean isFirst = true;

for (String key : param.keySet()) {

if (isFirst)

url.append("?");

else

url.append("&");

url.append(key).append("=").append(param.get(key));

}

this.url = url.toString();

}

HttpGet http = new HttpGet(url);

execute(http);

}

/**

* set http post,put param

*/

private void setEntity(HttpEntityEnclosingRequestBase http) {

if (param != null) {

List nvps = new LinkedList();

for (String key : param.keySet())

nvps.add(new BasicNameValuePair(key, param.get(key))); // 参数

http.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8)); // 设置参数

}

if (xmlParam != null) {

http.setEntity(new StringEntity(xmlParam, Consts.UTF_8));

}

}

private void execute(HttpUriRequest http) throws ClientProtocolException,

IOException {

CloseableHttpClient httpClient = null;

try {

if (isHttps) {

SSLContext sslContext = new SSLContextBuilder()

.loadTrustMaterial(null, new TrustStrategy() {

// 信任所有

public boolean isTrusted(X509Certificate[] chain,

String authType)

throws CertificateException {

return true;

}

}).build();

SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(

http:// sslContext);

httpClient = HttpClients.custom().setSSLSocketFactory(sslsf)

.build();

} else {

httpClient = HttpClients.createDefault();

}

CloseableHttpResponse response = httpClient.execute(http);

try {

if (response != null) {

if (response.getStatusLine() != null)

statusCode = response.getStatusLine().getStatusCode();

HttpEntity entity = response.getEntity();

// 响应内容

content = EntityUtils.toString(entity, Consts.UTF_8);

}

} finally {

response.close();

}

} catch (Exception e) {

e.printStackTrace();

} finally {

httpClient.close();

}

}

public int getStatusCode() {

return statusCode;

}

public String getContent() throws ParseException, IOException {

return content;

}

}

额~有点长就不放图片了 代码都一样

3. 新建controller

@Controller

@RequestMapping("/wxpay")

public class WxPayController {

@RequestMapping("/pay")

public String createPayQRcode(Model model) throws Exception{

String price = "0.01";

String no = getOrderNo();

Map m = new HashMap();

m.put("appid", WxPayUtils.WX_PAY_APP_ID);

m.put("mch_id", WxPayUtils.WX_PAY_PARTNER);

m.put("nonce_str", WXPayUtil.generateNonceStr());

m.put("body","微信支付测试"); //主体信息

m.put("out_trade_no", no); //订单唯一标识

m.put("total_fee", getMoney(price));//金额

m.put("spbill_create_ip", "127.0.0.1");//项目的域名

m.put("notify_url", WxPayUtils.WX_OPEN_NOTIFY_URL);//回调地址

m.put("trade_type", "NATIVE");//生成二维码的类型

//3 发送httpclient请求，传递参数xml格式，微信支付提供的固定的地址

HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");

//设置xml格式的参数

//把xml格式的数据加密

client.setXmlParam(WXPayUtil.generateSignedXml(m, WxPayUtils.WX_PAY_PARTNER_KEY));

client.setHttps(true);

//执行post请求发送

client.post();

//4 得到发送请求返回结果

//返回内容，是使用xml格式返回

String xml = client.getContent();

//把xml格式转换map集合，把map集合返回

Map resultMap = WXPayUtil.xmlToMap(xml);

//最终返回数据 的封装

Map map = new HashMap();

map.put("no", no);

map.put("price", price);

map.put("result_code", resultMap.get("result_code"));

map.put("code_url", resultMap.get("code_url"));

model.addAttribute("map",map);

return "pay";

}

@GetMapping("queryorder/{no}")

@ResponseBody

public String queryPayStatus(@PathVariable String no) throws Exception{

//1、封装参数

Map m = new HashMap<>();

m.put("appid", WxPayUtils.WX_PAY_APP_ID);

m.put("mch_id", WxPayUtils.WX_PAY_PARTNER);

m.put("out_trade_no", no);

m.put("nonce_str", WXPayUtil.generateNonceStr());

//2 发送httpclient

HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/orderquery");

client.setXmlParam(WXPayUtil.generateSignedXml(m, WxPayUtils.WX_PAY_PARTNER_KEY));

client.setHttps(true);

client.post();

//3.得到订单数据

String xml = client.getContent();

Map resultMap = WXPayUtil.xmlToMap(xml);

//4.判断是否支付成功

if(resultMap.get("trade_state").equals("SUCCESS")) {

/*

改变数据库中的数据等操作

*/

return "支付成功";

}

return "支付中";

}

@GetMapping("success")

public String success(){

return "success";

}

@RequestMapping("test")

public String test(){

return "pay";

}

/**

* 生成订单号

* @return

*/

public static String getOrderNo() {

SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");

String newDate = sdf.format(new Date());

String result = "";

Random random = new Random();

for (int i = 0; i < 3; i++) {

result += random.nextInt(10);

}

return newDate + result;

}

/**

* 元转换成分

* @param amount

* @return

*/

public static String getMoney(String amount) {

if(amount==null){

return "";

}

// 金额转化为分为单位

// 处理包含, ￥ 或者$的金额

String currency = amount.replaceAll("\\$|\\￥|\\,", "");

int index = currency.indexOf(".");

int length = currency.length();

Long amLong = 0l;

if(index == -1){

amLong = Long.valueOf(currency+"00");

}else if(length - index >= 3){

amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));

}else if(length - index == 2){

amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);

}else{

amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");

}

return amLong.toString();

}

}

值得一提的是 这里我们用的是controller而不是restcontroller，因为我们需要展示二维码

4. 在templates文件中新建 订单支付页面（二维码生成的页面）

注意：文件名必须和生成二维码方法中返回的字符串名称一样 我这里叫 pay

先新建html页面，然后再将后缀改成ftl（freemarker模板引擎的后缀名）

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