package com.stylefeng.guns.modular.system.util;
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import com.alibaba.fastjson.JSON;
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import com.alibaba.fastjson.JSONObject;
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import org.apache.commons.codec.binary.Base64;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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import org.springframework.web.client.RestTemplate;
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import javax.crypto.BadPaddingException;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.io.UnsupportedEncodingException;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import java.security.spec.AlgorithmParameterSpec;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* 微信工具类
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*/
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@Component
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public class WeChatUtil {
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@Value("${wx.appletsAppid}")
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private String wxAppletsAppid;
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@Value("${wx.appletsAppSecret}")
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private String wxAppletsAppSecret;
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@Autowired
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private RestTemplate restTemplate;
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/**
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* 小程序使用jscode获取openid
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* @param jscode
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* @return
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*/
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public Map<String, String> code2Session(String jscode){
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String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + wxAppletsAppid + "&secret=" + wxAppletsAppSecret
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+ "&js_code=" + jscode + "&grant_type=authorization_code";
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String forObject = restTemplate.getForObject(url, String.class);
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JSONObject jsonObject = JSON.parseObject(forObject);
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int errcode = jsonObject.getIntValue("errcode");
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Map<String, String> map = new HashMap<>();
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if(errcode == 0){//成功
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map.put("openid", jsonObject.getString("openid"));
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map.put("sessionKey", jsonObject.getString("session_key"));
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map.put("unionid", jsonObject.getString("unionid"));
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return map;
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}
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if(errcode == -1){//系统繁忙，此时请开发者稍候再试
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map.put("msg", jsonObject.getString("errmsg"));
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return map;
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}
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if(errcode == 40029){//code 无效
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map.put("msg", jsonObject.getString("errmsg"));
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return map;
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}
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if(errcode == 45011){//频率限制，每个用户每分钟100次
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map.put("msg", jsonObject.getString("errmsg"));
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return map;
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}
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return null;
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}
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/**
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* AES解密
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*
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* @param data //密文，被加密的数据
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* @param key //秘钥
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* @param iv //偏移量
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* @return
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* @throws Exception
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*/
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public static String decrypt1(String data, String key,String iv){
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//被加密的数据
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byte[] dataByte = Base64.decodeBase64(data);
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//加密秘钥
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byte[] keyByte = Base64.decodeBase64(key);
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//偏移量
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byte[] ivByte = Base64.decodeBase64(iv);
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try {
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AlgorithmParameterSpec ivSpec = new IvParameterSpec(ivByte);
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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SecretKeySpec keySpec = new SecretKeySpec(keyByte, "AES");
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cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
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return new String(cipher.doFinal(dataByte),"UTF-8");
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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} catch (NoSuchPaddingException e) {
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e.printStackTrace();
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} catch (InvalidKeyException e) {
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e.printStackTrace();
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} catch (InvalidAlgorithmParameterException e) {
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e.printStackTrace();
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} catch (IllegalBlockSizeException e) {
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e.printStackTrace();
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} catch (BadPaddingException e) {
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e.printStackTrace();
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return null;
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}
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}
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