前言
正文
组织参数
private static String createLinkString(Map<String, String> params) {
System.out.println(params.toString());
List<String> keys = new ArrayList<>(params.keySet());
Collections.sort(keys);
StringBuilder preStr = new StringBuilder();
for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);
// 拼接时，不包括最后一个&字符
if (i == keys.size() - 1) {
preStr.append(key).append("=").append(value);
} else {
preStr.append(key).append("=").append(value).append("&");
}
}
return preStr.toString();
}
这里的Parms就是所有的参数，注意，商户key参数最后拼接。
如上述，最终的参数拼接位 preStr.toString()+"&key="+"你的商户key";
加密参数 对最终拼接的参数进行MD5加密，转换成大写字母即可。 将参数实体转换成xml格式
<!--将javaBean 转换成 xml-->
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.10</version>
</dependency>
简单使用：
public static <T> String convertObjectToXml(Object obj, Class<T> type) {
XStream xstream = new XStream(new XppDriver(new XmlFriendlyNameCoder("__", "_")));
xstream.alias("xml", type);
return xstream.toXML(obj);
}
public static String mapToXml(Map<String, String> data) throws Exception {
org.w3c.dom.Document document = WeChatXmlUtil.newDocument();
org.w3c.dom.Element root = document.createElement("xml");
document.appendChild(root);
for (String key: data.keySet()) {
String value = data.get(key);
if (value == null) {
value = "";
}
value = value.trim();
org.w3c.dom.Element filed = document.createElement(key);
filed.appendChild(document.createTextNode(value));
root.appendChild(filed);
}
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
DOMSource source = new DOMSource(document);
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
transformer.transform(source, result);
String output = writer.getBuffer().toString();
try {
writer.close();
}
catch (Exception ex) {
}
return output;
}
最后就是发送请求 相信发送post请求大家都不陌生了吧
//keyStream 为证书的输入流
public static String wechatPost(String url,String params, InputStream keyStream ) throws Exception{
KeyStore keyStore = KeyStore.getInstance("PKCS12");
try {
keyStore.load(keyStream, WeixinConfig.MCH_ID.toCharArray());
} finally {
keyStream.close();
}
// Trust own CA and all self-signed certs
SSLContext sslcontext = SSLContexts.custom()
.loadKeyMaterial(keyStore, WeixinConfig.MCH_ID.toCharArray())
.build();
// Allow TLSv1 protocol only
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslcontext,
new String[] {
"TLSv1" },
null,
SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
CloseableHttpClient httpclient = HttpClients.custom()
.setSSLSocketFactory(sslsf)
.build();
try {
String resp = "";
HttpPost httpPost = new HttpPost(url);
StringEntity ent = new StringEntity(params,"utf-8");
ent.setContentType("application/x-www-form-urlencoded");
httpPost.setEntity(ent);
CloseableHttpResponse response = httpclient.execute(httpPost);
try {
HttpEntity entity = response.getEntity();
if (entity != null) {
System.out.println("Response content length: " + entity.getContentLength());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent(),"UTF-8"));
String text;
while ((text = bufferedReader.readLine()) != null) {
resp += text;
}
}
EntityUtils.consume(entity);
return resp;
}catch(Exception e){
}
finally {
response.close();
}
} finally {
httpclient.close();
}
return null;
}
组织小程序端需要参数
小程序端，调用接口领取红包
wx.sendBizRedPacket({
timeStamp: timeStamp,
nonceStr: nonceStr,
package: package,
signType: MD5, //固定值
paySign: paySign,
success: function (res) {
},
fail : function(res){
}
)}
