小程序登录java后端实现

@GetMapping("getOpenId/{code}")
public Wrapper<?> getOpenId(@PathVariable String code) {
if (StringUtils.isEmpty(code)) {
return WrapMapper.error(ErrorCodeEnum.ILLEGAL_ARGUMENT);
}
Map<String, String> map = appletService.getOpenId(code);
return CollectionUtils.isEmpty(map) ? WrapMapper.error("请求失败！") : WrapMapper.ok(map);
}

    public final static String URL = "https://api.weixin.qq.com/sns/jscode2session?appid=APPID&secret=SECRET&js_code=CODE&grant_type=authorization_code";
@Value("${wx.appid}")
private String appid;
@Value("${wx.appsecret}")
private String appsecret;
@Override
public Map<String, String> getOpenId(String code) {
String requestUrl = URL.replace("APPID", appid).replace("SECRET", appsecret).replace("CODE", code);
CloseableHttpClient client = HttpClientBuilder.create().build();
Map<String, String> result = new HashMap<>();
CloseableHttpResponse response = null;
try {
HttpGet httpGet = new HttpGet(requestUrl);
response = client.execute(httpGet);
HttpEntity responseEntity = response.getEntity();
String entry = EntityUtils.toString(responseEntity);
log.info("响应状态为:" + response.getStatusLine());
if (!StringUtils.isEmpty(entry)) {
log.info("响应内容为:" + entry);
JSONObject json = JSONObject.parseObject(entry);
String openid = String.valueOf(json.get("openid"));
String sessionKey = String.valueOf(json.get("session_key"));
String unionid = String.valueOf(json.get("unionid"));
String errcode = String.valueOf(json.get("errcode"));
String errmsg = String.valueOf(json.get("errmsg"));
result.put("openid", openid);
result.put("sessionKey", sessionKey);
result.put("unionid", unionid);
result.put("errcode", errcode);
result.put("errmsg", errmsg);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (client != null) {
client.close();
}
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}

@PostMapping("getPhoneNumber")
public Wrapper<?> getPhoneNumber(@RequestParam("encryptedData") String encryptedData, @RequestParam("sessionKey") String sessionKey, @RequestParam("iv") String iv) {
if (StringUtils.isEmpty(encryptedData) || StringUtils.isEmpty(sessionKey) || StringUtils.isEmpty(iv)) {
return WrapMapper.error(ErrorCodeEnum.ILLEGAL_ARGUMENT);
}
String phoneNumber = appletService.getPhoneNumber(encryptedData, sessionKey, iv);
return WrapMapper.ok(phoneNumber);
}

@Override
public String getPhoneNumber(String encryptedData, String sessionKey, String iv) {
byte[] dataByte = Base64.decode(encryptedData);
byte[] keyByte = Base64.decode(sessionKey);
byte[] ivByte = Base64.decode(iv);
try {
int base = 16;
if (keyByte.length % base != 0) {
int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
keyByte = temp;
}
Security.addProvider(new BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
parameters.init(new IvParameterSpec(ivByte));
            cipher.init(Cipher.DECRYPT_MODE, spec, parameters);
byte[] resultByte = cipher.doFinal(dataByte);
if (null != resultByte && resultByte.length > 0) {
String result = new String(resultByte, StandardCharsets.UTF_8);
log.info("获取手机号信息:{}", JSONObject.parseObject(result));
return (String) JSONObject.parseObject(result).get("phoneNumber");
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}