微信小程序获取openid unionid Springboot Java

Controller

	@RequestMapping("vx")
    public String vxLogin(String code,String encryptedData,String iv) {
        val jsonObject  = VXUtil.decryptCode(code);
        val openid      = jsonObject.getString("openid");
        val sessionKey = jsonObject.getString("session_key");
        String decrypt  = VXUtil.decrypt(sessionKey, iv, encryptedData);
        JSONObject object = new JSONObject(decrypt);
        System.out.println("object = " + object);
        return null;
    }

VXUtil

public static JSONObject decryptCode(String code) {
        String url = "https://api.weixin.qq.com/sns/jscode2session?appid={1}&secret={2}&js_code={3}&grant_type={4}";
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject(url,
                String.class,
                VXConfig.APP_ID,
                VXConfig.SECRET,
                code,
                VXConfig.GRANT_TYPE);
        //解析从微信服务器上获取到的json字符串
        return new JSONObject(result);
    }

    public static String decrypt(String sessionKey, String iv, String encryptData) {
        String decryptString = "";
        init();
        byte[] sessionKeyByte = Base64.decodeBase64(sessionKey);
        byte[] ivByte = Base64.decodeBase64(iv);
        byte[] encryptDataByte = Base64.decodeBase64(encryptData);

        try {
            Cipher              cipher              = Cipher.getInstance("AES/CBC/PKCS7Padding");
            Key                 key                 = new SecretKeySpec(sessionKeyByte, "AES");
            AlgorithmParameters algorithmParameters = AlgorithmParameters.getInstance("AES");
            algorithmParameters.init(new IvParameterSpec(ivByte));
            cipher.init(Cipher.DECRYPT_MODE, key, algorithmParameters);
            byte[] bytes = cipher.doFinal(encryptDataByte);
            decryptString = new String(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return decryptString;
    }

    private static boolean hasInited = false;

    public static void init() {
        if (hasInited) {
            return;
        }
        Security.addProvider(new BouncyCastleProvider());
        hasInited = true;
    }

WXConfig

public interface VXConfig {
    /**
     * 在后台
     */
    String APP_ID     = "wxcbe411f898llllllll";
    /**
     * 在后台
     */
    String SECRET     = "b12a7e212a2383lllllllllllllllllll";
    /**
     * 固定
     */
    String GRANT_TYPE = "authorization_code";
}

依赖：

		<dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk16</artifactId>
            <version>1.46</version>
        </dependency>

        <!--编码-->
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
        </dependency>

app.js

//app.js
App({
    onLaunch: function() {
        try {
            let res = wx.getStorageInfoSync()
            if (res[\'teacher\']) {
                return
            }
        } catch (e) {
            // Do something when catch error
        }

        let that = this
        wx.getSetting({
            success(res) {
                if (res.authSetting[\'scope.userInfo\']) {
                    that.login()
                } else {
                    wx.redirectTo({
                        url: \'/pages/info/getUserInfo\',
                    })
                }
            }
        })
    },
    login() {
        let that = this
        // 登录
        wx.login({
            success(r) {
                wx.getUserInfo({
                    withCredentials:true,
                    success(res) {
                        console.log(res)
                        that.global.userInfo = res.userInfo
                        wx.request({
                            url: that.global.host + \'/login/vx\',
                            data: {
                                encryptedData: res.encryptedData,
                                iv: res.iv,
                                code: r.code
                            },
                            success(res) {
                                console.log(res)
                            }
                        })
                    }
                })
            }
        })
    },
    global: {
        userInfo: null,
        host: "http://192.168.1.4"
    }
})