小程序獲取手機號，后端JAVA解密流程代碼

微信官方文檔獲取手機號流程地址,先看下最好方便理解下面步驟實現思路，步驟如下

1.前端需先調用官方wx.login接口獲取登錄憑證code。2.后端接收code 調用官方接口地址獲取用戶秘鑰 sessionKey。3.前端通過官方getPhoneNumber獲取encryptedData，iv4.前端通過參數**【encryptedData】 、【iv】 、【sessionKey】** 發送請求后端接口，解密用戶手機號

小程序獲取sessionkey詳細接口文檔

后端工作如下，

1.參數code 解密出sessionKey {“session_key”:“eF9PAi5P7ZbSaQqkGzEY5g==”,“openid”:“otJ1I4zMSFGDtk7C33O_h6U3IRK8”} 2.參數sessionKey，iv，encryptedData 解密出手機號

代碼如下：

下面工具類很全，放心代碼必須全，良心教程。

業務代碼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 = '小程序登錄授權 Controller',tags = {'小程序登錄授權接口'})@RestController@RequestMapping('/app')public class APPController { /** * 微信小程序登錄獲取 * 獲取session_key * @param * @return */ @ResponseBody @PostMapping('/initWxLogin') @ApiImplicitParams({ @ApiImplicitParam(name = 'js_code', value = '登錄時獲取的code',paramType = 'form', dataType = 'string', required = true) }) public ResultBeaninitWxLogin(@RequestParam(value = 'js_code', required = true) String js_code) throws JSONException { //測試數據code// js_code = '081ZQ3f91fr9VM1HYdb91y93f91ZQ3fU'; //微信獲取session_key接口地址 String wxLoginUrl = 'https://api.weixin.qq.com/sns/jscode2session'; //接口參數 String param = 'appid=小程序id&secret=小程序secret&js_code=' + js_code + '&grant_type=authorization_code'; //調用獲取session_key接口 請求方式get String jsonString = GetPostUntil.sendGet(wxLoginUrl, param); System.out.println(jsonString); //因為json字符串是大括號包圍，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); //返回給前端 return ResultBean.success('session_key',session_key); } /** * 解密小程序用戶敏感數據 * * @param encryptedData 明文 * @param iv 加密算法的初始向量 * @param sessionKey 用戶秘鑰 * @return */ @ResponseBody @PostMapping(value = '/decodeUserInfo') @ApiImplicitParams({ @ApiImplicitParam(name = 'encryptedData', value = '包括敏感數據在內的完整用戶信息的加密數據',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 = '用戶秘鑰',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微信獲取手機號解密工具類 AESUtils aes = new AESUtils(); //調用AESUtils工具類decrypt方法解密獲取json串 byte[] resultByte = aes.decrypt(Base64.decodeBase64(encryptedData), Base64.decodeBase64(sessionKey), Base64.decodeBase64(iv)); //判斷返回參數是否為空 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('手機號', phoneNumber); } return ResultBean.error(500,'session_key:失敗'); }}

工具類代碼如下

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發送GET方法的請求 * * @param url * 發送請求的URL * @param param * 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。 * @return URL 所代表遠程資源的響應結果 */ public static String sendGet(String url, String param) { String result = ''; BufferedReader in = null; try {String urlNameString = url + '?' + param;URL realUrl = new URL(urlNameString);// 打開和URL之間的連接URLConnection connection = realUrl.openConnection();// 設置通用的請求屬性connection.setRequestProperty('accept', '*/*');connection.setRequestProperty('connection', 'Keep-Alive');connection.setRequestProperty('user-agent', 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)');// 建立實際的連接connection.connect();// 獲取所有響應頭字段Map<String, List<String>> map = connection.getHeaderFields();// 遍歷所有的響應頭字段for (String key : map.keySet()) { System.out.println(key + '--->' + map.get(key));}// 定義 BufferedReader輸入流來讀取URL的響應in = new BufferedReader(new InputStreamReader( connection.getInputStream()));String line;while ((line = in.readLine()) != null) { result += line;} } catch (Exception e) {System.out.println('發送GET請求出現異常！' + e);e.printStackTrace(); } // 使用finally塊來關閉輸入流 finally {try { if (in != null) { in.close(); }} catch (Exception e2) { e2.printStackTrace();} } return result; } /** * 向指定 URL 發送POST方法的請求 * * @param url * 發送請求的 URL * @param param * 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。 * @return 所代表遠程資源的響應結果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ''; try {URL realUrl = new URL(url);// 打開和URL之間的連接URLConnection conn = realUrl.openConnection();// 設置通用的請求屬性conn.setRequestProperty('accept', '*/*');conn.setRequestProperty('connection', 'Keep-Alive');conn.setRequestProperty('user-agent', 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)');// 發送POST請求必須設置如下兩行conn.setDoOutput(true);conn.setDoInput(true);// 獲取URLConnection對象對應的輸出流out = new PrintWriter(conn.getOutputStream());// 發送請求參數out.print(param);// flush輸出流的緩沖out.flush();// 定義BufferedReader輸入流來讀取URL的響應in = new BufferedReader( new InputStreamReader(conn.getInputStream()));String line;while ((line = in.readLine()) != null) { result += line;} } catch (Exception e) {System.out.println('發送 POST 請求出現異常！'+e);e.printStackTrace(); } //使用finally塊來關閉輸出流、輸入流 finally{try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); }}catch(IOException ex){ ex.printStackTrace();} } return result; } }

AESUtils工具類 解密手機號

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; }}

接口返回對象ResultBean定義工具類 防止有些朋友發現沒有這個類

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 = '返回碼',dataType = 'int') private int code; @ApiModelProperty(value = '返回描述信息',dataType = 'string') private String message; @ApiModelProperty(value = '返回數據') 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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