按照微信小程序官方文档，获取用户手机号分为2部分
微信小程序官网路径：https://developers./miniprogram/dev/framework/open-ability/login.html
1.根据前端发送的code,根据微信提供的接口获取 session_key 和 openId
2.根据参数 session_key，vi，encrypted得到 用户手机号
使用微信小程序绑定所需要的依赖
<!--微信小程序，获取session_key所需依赖--><dependency><groupId>net.sf.json-lib</groupId><artifactId>json-lib-ext-spring</artifactId><version>1.0.2</version></dependency><dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version></dependency>
1：根据code获取session:
1.1：appSecret和appId是公司的，code是每次生成5分钟内有效
public Map<String,String> sessionKey(String code){Map<String,String> map = new HashMap<>();String result = "";try{//请求微信服务器，用code换取openid。HttpUtil是工具类，后面会给出实现，Configure类是小程序配置信息，后面会给出代码result = HttpUtils.doGet("https://api./sns/jscode2session?appid="+ appId + "&secret="+ appSecret + "&js_code="+ code+ "&grant_type=authorization_code", null);}catch (Exception e) {e.printStackTrace();}net.sf.json.JSONObject jsonObj = net.sf.json.JSONObject.fromObject(result);//解析从微信服务器上获取到的json字符串System.out.println("用户的openid为："+jsonObj.get("openid"));//此处也可以得到session_key的值System.out.println("用户的session_key为："+jsonObj.get("session_key"));map.put("sessionKey",jsonObj.get("session_key").toString());map.put("openId",jsonObj.get("openid").toString());return map;}
httpUtils工具类： 调用微信提供接口
public static String doGet(String urlPath, HashMap<String, Object> params)throws Exception {StringBuilder sb = new StringBuilder(urlPath);if (params != null && !params.isEmpty()) {// 说明有参数sb.append("?");Set<Map.Entry<String, Object>> set = params.entrySet();for (Map.Entry<String, Object> entry : set) {// 遍历map里面的参数String key = entry.getKey();String value = "";if (null != entry.getValue()) {value = entry.getValue().toString();// 转码value = URLEncoder.encode(value, "UTF-8");}sb.append(key).append("=").append(value).append("&");}sb.deleteCharAt(sb.length() - 1); // 删除最后一个&}// System.out.println(sb.toString());URL url = new URL(sb.toString());HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(5000); // 5s超时conn.setRequestMethod("GET");if (conn.getResponseCode() == HttpStatus.SC_OK) {// HttpStatus.SC_OK ==// 200BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));StringBuilder sbs = new StringBuilder();String line;while ((line = reader.readLine()) != null) {sbs.append(line);}// JSONObject jsonObject = new JSONObject(sbs.toString());return sbs.toString();}return null;}
实体类：
public class WxConstant {//appidpublic static final String appid = "";//appsecretpublic static final String secret = "";public static final String authApi = "https://api./sns/jscode2session";public static final String AES = "AES";public static final String AES_CBC_PADDING = "AES/CBC/PKCS7Padding";}
以上是获取session_key 和 openId 代码
以下是获取用户手机号：
1.前端传递过来的 encrypted和iv (注意：前端生成的iv每次都不一样)
2.wxEntity是我自己封装的 如果用请求参数
例子：https://127.0.0.1:8000/mini/register?session_key=ulLsFyKlCfie8xgdPYebNQ&encrypted=“4CALAdX4HxmqBHR4m8xsxFIlJ8TLRNL3eV4uMghMa2cyuEbWM9qgpGAXT/8H9Kq23ytAQrcoUwY5Zdsk0It1IN0SDLF1KBdBwOr8OPcYQMN2Ff8313QAUSbwwnF02NVFHMQVMC9+v4gjOdZgImvAn5xdy9m6+ocw3G76+HBju/jTzInLJQoN8GQAZJ6OokbZcI0Kl7kx/Ur5iFnN22dgWg==”&iv=+sqy0eKrknPdL11UjN340g==
传递时：+或者空格 会进行转义，导致传递参数改变，所以我这里使用 json合适传递
String obj = WxUtils.wxDecrypt(EncryptedData(),sessionKey,Iv());net.sf.json.JSONObject jsonObject = net.sf.json.JSONObject.fromObject(obj);String phoneNumber = jsonObject.getString("phoneNumber");System.out.println("phoneNumber:"+phoneNumber);
wxUtils:
public static String wxDecrypt(String encrypted, String session_key, String iv) {String result = null;byte[] encrypted64 = Base64.decodeBase64(encrypted);byte[] key64 = Base64.decodeBase64(session_key);byte[] iv64 = Base64.decodeBase64(iv);// 如果密钥不足16位，那么就补足. 这个if 中的内容很重要int base = 16;if (key64.length % base != 0) {int groups = key64.length / base+ (key64.length % base != 0 ? 1 : 0);byte[] temp = new byte[groups * base];Arrays.fill(temp, (byte) 0);System.arraycopy(key64, 0, temp, 0, key64.length);key64 = temp;}try {init();result = new String(decrypt(encrypted64, key64, generateIV(iv64)));} catch (Exception e) {e.printStackTrace();}return result;}/*** * 初始化密钥**/public static void init() throws Exception {Security.addProvider(new BouncyCastleProvider());KeyGenerator.getInstance(WxConstant.AES).init(128);}/*** * 生成iv**/public static AlgorithmParameters generateIV(byte[] iv) throws Exception {// iv 为一个 16 字节的数组，这里采用和 iOS 端一样的构造方法，数据全为0// Arrays.fill(iv, (byte) 0x00);AlgorithmParameters params = AlgorithmParameters.getInstance(WxConstant.AES);params.init(new IvParameterSpec(iv));return params;}/*** * 生成解密**/public static byte[] decrypt(byte[] encryptedData, byte[] keyBytes, AlgorithmParameters iv)throws Exception {Key key = new SecretKeySpec(keyBytes, WxConstant.AES);Cipher cipher = Cipher.getInstance(WxConstant.AES_CBC_PADDING);// 设置为解密模式cipher.init(Cipher.DECRYPT_MODE, key, iv);return cipher.doFinal(encryptedData);}
以上就是实现微信绑定的代码，如果有不对的地方，请多指教
