java 后台获取用户授权的电话号码

哈哈哈,获取手机号码出了一个bug，第一次获取反正不成功。第二次获取才成功。上网查资料有人说改jdk的,改什么什么的反正都贼麻烦，最后用到了BouncyCastle这个类解决了这个问题。先说一下哈，并不是所有的小程序都有权限可以获取手机号，个人的获取不了。要通过企业认证才行。 

     import org.apache.commons.codec.binary.Base64;

     import org.bouncycastle.jce.provider.BouncyCastleProvider;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.*;
import java.security.spec.AlgorithmParameterSpec;

public class WXBizDataCrypt {
    private static final Logger logger = LoggerFactory.getLogger(WXBizDataCrypt.class);
    /**
     * AES解密
     *
     * @param data   //密文，被加密的数据，也就是sessionkey，这个sessionkey在我博客获取openId那里可以得到
     * @param key    //秘钥
     * @param iv     //偏移量
     * @return
     * @throws Exception
     */
    static { try { Security.addProvider(new BouncyCastleProvider()); } catch (Exception e) { e.printStackTrace(); } }
    public static String decrypt1(String data, String key, String iv) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, UnsupportedEncodingException, NoSuchProviderException {
        //被加密的数据
        byte[] dataByte = Base64.decodeBase64(data);
        //加密秘钥
        byte[] keyByte = Base64.decodeBase64(key);
        //偏移量
        byte[] ivByte = Base64.decodeBase64(iv);

        AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivByte);
        SecretKeySpec keySpec = new SecretKeySpec(keyByte, "AES");
        try {
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
            return new String(cipher.doFinal(dataByte),"UTF-8");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (InvalidAlgorithmParameterException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            logger.info("BadPaddingException:"+e.getMessage()+"更换填充方式");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
            return new String(cipher.doFinal(dataByte), "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return null;
    }

}
//调用

String result = WXBizDataCrypt.decrypt1(encryptedData, sessionKey, iv);

//存入map
if (!StringUtils.isEmpty(result) && result.length() > 0) {
    map.put("phoneNumber", json.getString("phoneNumber"));
}
小女子不才期望得到大佬的批评指正。嘿嘿，其实我是男的。
想要maven依赖的伙计可以直接评论哈。