第一步.

调用wx.login 获取code

uni.login({
            provider: 'weixin',
            success(res) {
              if (res.errMsg === 'login:ok') {
                return resolve({access_token, code: res.code})
              } else {
                return reject()
              }
            }
          })

第二步.

根据code去获取session_key

get请求 https://api.weixin.qq.com/sns/jscode2session

/**
 * @author 
 */
@Data
@Component
@ConfigurationProperties(prefix = "wx.config")
public class WxMaProperties {

        /**
         * 设置微信小程序的appid
         */
        private String appid;

        /**
         * 设置微信小程序的Secret
         */
        private String secret;

        /**
         * 设置微信小程序消息服务器配置的token
         */
        private String token;

        /**
         * 设置微信小程序消息服务器配置的EncodingAESKey
         */
        private String aesKey;

        /**
         * 消息格式，XML或者JSON
         */
        private String msgDataFormat;



}


  /**
     * 微信小程序获取OPENID
     */
    String WX_AUTHORIZATION_CODE_URL = "https://api.weixin.qq.com/sns/jscode2session" +
            "?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code";


    public R getOpenId(String code){
        String url = String.format(SecurityConstants.WX_AUTHORIZATION_CODE_URL
                , wxMaProperties.getAppid(), wxMaProperties.getSecret(), code);
        String result = restTemplate.getForObject(url, String.class);
        //log.info("微信响应报文:{}", result);

        ObjectMapper objectMapper = new ObjectMapper();
        OpenIdDto openIdDto;
        try {
            openIdDto = objectMapper.readValue(result, OpenIdDto.class);
        }catch (Exception e){
            e.printStackTrace();
            return new R(-1,"解析微信结果出错");
        }

       return new R(openIdDto);
    }

@Data
public class OpenIdDto {

   private String openid;
   private String session_key;
}

第三步,

将接口返回的session_key. 

<button class="cu-btn" open-type="getPhoneNumber" @getphonenumber="getPhone" >获取微信授权</button>

wx接口的iv, encryptedData,  放进工具类解密

methods: {
			getPhone(e) {
					    console.log(e.detail.errMsg)
    console.log(e.detail.iv)
    console.log(e.detail.encryptedData)
			}
	  }

手机号, 用户信息都已经测试过,可以使用

解密方法如下

public class DecodeUtil {


    /**
     * 解密工具直接放进去即可
     */
    public static String decryptS5(String encryptedData, String sessionKey, String ivParameter) {
        try {

            Base64.Decoder decoder = Base64.getDecoder();
            byte[] raw = decoder.decode(sessionKey);
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            IvParameterSpec iv = new IvParameterSpec(decoder.decode(ivParameter));
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
            byte[] myendicod = decoder.decode(encryptedData);
            byte[] original = cipher.doFinal(myendicod);
            return new String(original, "utf-8");
        } catch (Exception ex) {
            return null;
        }
    }
}