微信小程序获取手机号，后端JAVA解密流程代码

小程序获取手机号，后端JAVA解密流程代码

微信官方文档获取手机号流程地址,先看下最好方便理解下面步骤实现思路，步骤如下

1.前端需先调用官方wx.login接口获取登录凭证code。2.后端接收code 调用官方接口地址获取用户秘钥 sessionKey。3.前端通过官方getPhoneNumber获取encryptedData，iv4.前端通过参数**【encryptedData】 、【iv】 、【sessionKey】** 发送请求后端接口，解密用户手机号

小程序获取sessionkey详细接口文档

后端工作如下，

1.参数code 解密出sessionKey {“session_key”:“eF9PAi5P7ZbSaQqkGzEY5g==”,“openid”:“otJ1I4zMSFGDtk7C33O_h6U3IRK8”} 2.参数sessionKey，iv，encryptedData 解密出手机号

代码如下：

下面工具类很全，放心代码必须全，良心教程。

业务代码Controller

package com.df.detection.controller;import com.df.detection.base.entity.ResultBean;import io.swagger.annotations.Api;import io.swagger.annotations.ApiImplicitParam;import io.swagger.annotations.ApiImplicitParams;import org.apache.commons.codec.binary.Base64;import org.json.JSONException;import org.springframework.web.bind.annotation.*;import java.io.UnsupportedEncodingException;import java.security.InvalidAlgorithmParameterException;import org.json.JSONObject;/** * @Author Songzhongjin * @Date 2020/7/15 10:09 * @Version 1.0 */@Api(value = '小程序登录授权 Controller',tags = {'小程序登录授权接口'})@RestController@RequestMapping('/app')public class APPController { /** * 微信小程序登录获取 * 获取session_key * @param * @return */ @ResponseBody @PostMapping('/initWxLogin') @ApiImplicitParams({ @ApiImplicitParam(name = 'js_code', value = '登录时获取的code',paramType = 'form', dataType = 'string', required = true) }) public ResultBeaninitWxLogin(@RequestParam(value = 'js_code', required = true) String js_code) throws JSONException { //测试数据code// js_code = '081ZQ3f91fr9VM1HYdb91y93f91ZQ3fU'; //微信获取session_key接口地址 String wxLoginUrl = 'https://api.weixin.qq.com/sns/jscode2session'; //接口参数 String param = 'appid=小程序id&secret=小程序secret&js_code=' + js_code + '&grant_type=authorization_code'; //调用获取session_key接口 请求方式get String jsonString = GetPostUntil.sendGet(wxLoginUrl, param); System.out.println(jsonString); //因为json字符串是大括号包围，所以用JSONObject解析 JSONObject json = new JSONObject(jsonString); //json解析session_key值 String session_key = json.getString('session_key'); System.out.println('session_key：' + session_key); //返回给前端 return ResultBean.success('session_key',session_key); } /** * 解密小程序用户敏感数据 * * @param encryptedData 明文 * @param iv 加密算法的初始向量 * @param sessionKey 用户秘钥 * @return */ @ResponseBody @PostMapping(value = '/decodeUserInfo') @ApiImplicitParams({ @ApiImplicitParam(name = 'encryptedData', value = '包括敏感数据在内的完整用户信息的加密数据',paramType = 'form', dataType = 'string', required = true), @ApiImplicitParam(name = 'iv', value = '加密算法的初始向量',paramType = 'form', dataType = 'string', required = true), @ApiImplicitParam(name = 'sessionKey', value = '用户秘钥',paramType = 'form', dataType = 'string', required = true) }) public ResultBean decodeUserInfo(@RequestParam(required = true, value = 'encryptedData') String encryptedData, @RequestParam(required = true, value = 'iv') String iv, @RequestParam(required = true, value = 'sessionKey') String sessionKey ) throws UnsupportedEncodingException, InvalidAlgorithmParameterException, JSONException { //AESUtils微信获取手机号解密工具类 AESUtils aes = new AESUtils(); //调用AESUtils工具类decrypt方法解密获取json串 byte[] resultByte = aes.decrypt(Base64.decodeBase64(encryptedData), Base64.decodeBase64(sessionKey), Base64.decodeBase64(iv)); //判断返回参数是否为空 if (null != resultByte && resultByte.length > 0) { String jsons = new String(resultByte, 'UTF-8'); System.out.println(jsons); JSONObject json = new JSONObject(jsons); //json解析phoneNumber值 String phoneNumber = json.getString('phoneNumber'); System.out.println('phoneNumber：' + phoneNumber); return ResultBean.success('手机号', phoneNumber); } return ResultBean.error(500,'session_key:失败'); }}

工具类代码如下

package com.df.detection.controller;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.net.URLConnection;import java.util.List;import java.util.Map;/** * @Author Songzhongjin * @Date 2020/7/15 10:37 * @Version 1.0 */public class GetPostUntil { /** * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return URL 所代表远程资源的响应结果 */ public static String sendGet(String url, String param) { String result = ''; BufferedReader in = null; try {String urlNameString = url + '?' + param;URL realUrl = new URL(urlNameString);// 打开和URL之间的连接URLConnection connection = realUrl.openConnection();// 设置通用的请求属性connection.setRequestProperty('accept', '*/*');connection.setRequestProperty('connection', 'Keep-Alive');connection.setRequestProperty('user-agent', 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)');// 建立实际的连接connection.connect();// 获取所有响应头字段Map<String, List<String>> map = connection.getHeaderFields();// 遍历所有的响应头字段for (String key : map.keySet()) { System.out.println(key + '--->' + map.get(key));}// 定义 BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader( connection.getInputStream()));String line;while ((line = in.readLine()) != null) { result += line;} } catch (Exception e) {System.out.println('发送GET请求出现异常！' + e);e.printStackTrace(); } // 使用finally块来关闭输入流 finally {try { if (in != null) { in.close(); }} catch (Exception e2) { e2.printStackTrace();} } return result; } /** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ''; try {URL realUrl = new URL(url);// 打开和URL之间的连接URLConnection conn = realUrl.openConnection();// 设置通用的请求属性conn.setRequestProperty('accept', '*/*');conn.setRequestProperty('connection', 'Keep-Alive');conn.setRequestProperty('user-agent', 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)');// 发送POST请求必须设置如下两行conn.setDoOutput(true);conn.setDoInput(true);// 获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());// 发送请求参数out.print(param);// flush输出流的缓冲out.flush();// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader( new InputStreamReader(conn.getInputStream()));String line;while ((line = in.readLine()) != null) { result += line;} } catch (Exception e) {System.out.println('发送 POST 请求出现异常！'+e);e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally{try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); }}catch(IOException ex){ ex.printStackTrace();} } return result; } }

AESUtils工具类 解密手机号

package com.df.detection.controller;import org.apache.tomcat.util.codec.binary.Base64;import org.bouncycastle.jce.provider.BouncyCastleProvider;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;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 javax.xml.transform.Result;import java.security.*;/** * @Author Songzhongjin * @Date 2020/7/15 11:46 * @Version 1.0 */public class AESUtils { public static boolean initialized = false; /** * AES解密 * @param content 密文 * @return * @throws InvalidAlgorithmParameterException * @throws NoSuchProviderException */ public byte[] decrypt(byte[] content, byte[] keyByte, byte[] ivByte) throws InvalidAlgorithmParameterException { initialize(); try { Cipher cipher = Cipher.getInstance('AES/CBC/PKCS7Padding'); Key sKeySpec = new SecretKeySpec(keyByte, 'AES'); cipher.init(Cipher.DECRYPT_MODE, sKeySpec, generateIV(ivByte));// 初始化 byte[] result = cipher.doFinal(content); return result; } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidKeyException e) { e.printStackTrace(); } catch (IllegalBlockSizeException e) { e.printStackTrace(); } catch (BadPaddingException e) { e.printStackTrace(); } catch (NoSuchProviderException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } public static void initialize(){ if (initialized) { return; } Security.addProvider(new BouncyCastleProvider()); initialized = true; } //生成iv public static AlgorithmParameters generateIV(byte[] iv) throws Exception { AlgorithmParameters params = AlgorithmParameters.getInstance('AES'); params.init(new IvParameterSpec(iv)); return params; }}

接口返回对象ResultBean定义工具类 防止有些朋友发现没有这个类

package com.df.detection.base.entity;import io.swagger.annotations.ApiModelProperty;/** * @author Liu Yaoguang * @Classname aaa * @Description * @Date 2019/12/06 09:22 */public class ResultBean<T> { @ApiModelProperty(value = '返回码',dataType = 'int') private int code; @ApiModelProperty(value = '返回描述信息',dataType = 'string') private String message; @ApiModelProperty(value = '返回数据') private T data; @ApiModelProperty(value = '口令',dataType = 'string') private String token; private ResultBean() { } public static ResultBean error(int code, String message) { ResultBean resultBean = new ResultBean(); resultBean.setCode(code); resultBean.setMessage(message); return resultBean; } public static<T> ResultBean error(int code, String message,T data) { ResultBean resultBean = new ResultBean(); resultBean.setCode(code); resultBean.setMessage(message); resultBean.setData(data); return resultBean; } public static ResultBean success(String message) { ResultBean resultBean = new ResultBean(); resultBean.setCode(200); resultBean.setMessage(message); return resultBean; } public static<T> ResultBean success(String message,T data) { ResultBean resultBean = new ResultBean(); resultBean.setCode(200); resultBean.setMessage(message); resultBean.setData(data); return resultBean; } public static ResultBean success(String message,Object data,String token) { ResultBean resultBean = new ResultBean(); resultBean.setCode(200); resultBean.setMessage(message); resultBean.setData(data); resultBean.setToken(token); return resultBean; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public T getData() { return data; } public void setData(T data) { this.data = data; } public String getToken() { return token; } public void setToken(String token) { this.token = token; }}

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