解密用户信息报错，如下： 前端： [代码]          [代码][代码]wx.login({[代码] [代码]            [代码][代码]success: [代码][代码]function[代码] [代码](loginResp) {[代码][代码]              [代码][代码]if[代码] [代码](loginResp.code) {[代码][代码]                [代码][代码]//获取用户信息[代码][代码]                [代码][代码]wx.getUserInfo({[代码][代码]                  [代码][代码]withCredentials: [代码][代码]true[代码][代码],[代码][代码]                  [代码][代码]success: [代码][代码]function[代码] [代码](res) {[代码][代码]                    [代码][代码]//封装登陆需要的参数[代码][代码]                    [代码][代码]var[代码] [代码]params = {};[代码][代码]                    [代码][代码]params.code = loginResp.code;[代码][代码]                    [代码][代码]params.encryptedData = res.encryptedData;[代码][代码]                    [代码][代码]params.iv = res.iv;[代码][代码]                    [代码][代码]//调用登陆接口[代码][代码]                    [代码][代码]that.sendRequest({[代码][代码]                      [代码][代码]url: [代码][代码]'/login'[代码][代码],[代码][代码]                      [代码][代码]data: params,[代码][代码]                      [代码][代码]success: [代码][代码]function[代码] [代码](res) {[代码][代码]                        //cache userInfo...[代码][代码]                      [代码][代码]}[代码][代码]                    [代码][代码]})[代码][代码]                  [代码][代码]},[代码][代码]                  [代码][代码]fail: [代码][代码]function[代码] [代码](e) {[代码][代码]                    [代码][代码]console.log(e);[代码][代码]                  [代码][代码]}[代码][代码]                [代码][代码]});[代码][代码]              [代码][代码]} [代码][代码]else[代码] [代码]{[代码][代码]                [代码][代码]console.log([代码][代码]'获取用户登录态失败！'[代码] [代码]+ res.errMsg)[代码][代码]              [代码][代码]}[代码][代码]            [代码][代码]}[代码][代码]          [代码][代码]});[代码] 后台步骤： 1) 跟据code换取用户session_key 拼接url参数：https://api.weixin.qq.com/sns/jscode2session?appid=xxx&secret=xxxx&js_code=xxxx&grant_type=authorization_code 请求方式：http get 返回结果： {"session_key":"xxxxxxxx","openid":"xxxxxxxxxx"} 2) 使用解密工具类解密出明文，使用：AES/CBC/PKCS7Padding   AES方式解密 参数：encryptedData、sessionKey、iv 结果： javax.crypto.BadPaddingException: pad block corrupted 但是紧接着第二次再走以上流程是可以正常解出明文用户信息的 过会再走以上流程第一次请求又是报这个错误