JAVA 微信小程序获取用户信息和手机号码解密

配置文件 WxConstant.java

/** * wx 配置文件 * */ public class WxConstant { public static final String appid = "你的appid"; public static final String secret = "你的secret"; public static final String AES = "AES"; public static final String AES_CBC_PADDING = "AES/CBC/PKCS7Padding"; }

maven依赖引入

<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec --> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency>

Controller类 UserController.java

@RestController @RequestMapping("/user") @CrossOrigin(origins = "*", maxAge = 3600) public class UserController { @ApiOperation(value = "openid", notes = "获取openId的接口") @GetMapping("/auth") public Object auth(String code) { String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + WxConstant.appid + "&secret=" + WxConstant.secret + "&js_code=" + code + "&grant_type=authorization_code"; Map<String, Object> map = new HashMap<>(); String data = HttpUtils.sendGet(url, null); JSONObject jo = JSON.parseObject(data); map.put("code", 0); map.put("data", jo); map.put("msg", "调用成功"); return map; } @ApiOperation(value = "权限获取用户手机号", notes = "权限获取用户手机号") @GetMapping("/auth/phone") public Object authPhone(String encryptedData, String session_key, String iv) { Map<String, Object> map = new HashMap<>(); try { String result = WxUtils.wxDecrypt(encryptedData, session_key, iv); JSONObject json = JSONObject.parseObject(result); if (json.containsKey("phoneNumber")) { String phone = json.getString("phoneNumber"); String appid = json.getJSONObject("watermark").getString("appid"); if (StringUtils.isNoneBlank(phone)) { wxUserService.updateMobile(appid, phone); map.put("code", 0); map.put("msg", "成功"); map.put("data", ""); } else { map.put("code", 4001); map.put("msg", "失败！用户未绑定手机号"); map.put("data", ""); } } else { map.put("code", 4001); map.put("msg", "获取失败！"); map.put("data", ""); } } catch (Exception e) { map.put("code", 4001); map.put("msg", "获取失败"); map.put("data", ""); } return map; } }

手机号解密工具 WxUtils.java

import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import com.clunt.demo.constant.WxConstant; import org.apache.commons.codec.binary.Base64; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.security.AlgorithmParameters; import java.security.Key; import java.security.Security; /** * @author clunt * <p>微信手机号解密</p> * */ public class WxUtils { /** * * 微信 数据解密<br/> * * 对称解密使用的算法为 AES-128-CBC，数据采用PKCS#7填充<br/> * * 对称解密的目标密文:encrypted=Base64_Decode(encryptData)<br/> * * 对称解密秘钥:key = Base64_Decode(session_key),aeskey是16字节<br/> * * 对称解密算法初始向量:iv = Base64_Decode(iv),同样是16字节<br/> * * * * @param encrypted 目标密文 * * @param session_key 会话ID * * @param iv 加密算法的初始向量 * */ public static String wxDecrypt(String encrypted, String session_key, String iv) { String result = null; byte[] encrypted64 = Base64.decodeBase64(encrypted); byte[] key64 = Base64.decodeBase64(session_key); byte[] iv64 = Base64.decodeBase64(iv); try { init(); result = new String(decrypt(encrypted64, key64, generateIV(iv64))); } catch (Exception e) { e.printStackTrace(); } return result; } /** * * 初始化密钥 * */ public static void init() throws Exception { Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); KeyGenerator.getInstance(WxConstant.AES).init(128); } /** * * 生成iv * */ public static AlgorithmParameters generateIV(byte[] iv) throws Exception { // iv 为一个 16 字节的数组，这里采用和 iOS 端一样的构造方法，数据全为0 // Arrays.fill(iv, (byte) 0x00); AlgorithmParameters params = AlgorithmParameters.getInstance(WxConstant.AES); params.init(new IvParameterSpec(iv)); return params; } /** * * 生成解密 * */ public static byte[] decrypt(byte[] encryptedData, byte[] keyBytes, AlgorithmParameters iv) throws Exception { Key key = new SecretKeySpec(keyBytes, WxConstant.AES); Cipher cipher = Cipher.getInstance(WxConstant.AES_CBC_PADDING); // 设置为解密模式 cipher.init(Cipher.DECRYPT_MODE, key, iv); return cipher.doFinal(encryptedData); } }

***特别注意：***小程序前台在拿到手机号授权信息前，不可以执行重新获取code的操作。不然会提示 code is used error