本文主要总结微信小程序通过后台请求访问微信用户信息
创建一个微信小程序工程(自行百度)
微信小程序index.js代码
//index.js//获取应用实例const app = getApp()Page({data: {motto: 'Hello World',userInfo: {},backUserInfo:{},//后台得到的微信用户信息hasUserInfo: false,canIUse: wx.canIUse('button.open-type.getUserInfo')},//事件处理函数bindViewTap: function() {wx.navigateTo({url: '../logs/logs'})},onLoad: function () {//1.静默操作获取用户信息 调用wx.loginvar that = this;wx.login({success:function(res){var code = res.code;//2.登录凭证codeconsole.log('code==='+code);if(null!=code){wx.getUserInfo({success:function(ress){console.log('res===' + res);//3.请求自己的服务器，解密用户信息 wx.request({url: '/wcsp/oauth',method:'post',header:{'content-type': 'application/x-www-form-urlencoded'},data: { encryptedData: ress.encryptedData, iv: ress.iv, code: code},success:function(res){console.log('resjava===' + res.data.openId);that.setData({backUserInfo:res//将后台返回的数据赋值给backUserInfo})}})}})}}})if (app.globalData.userInfo) {this.setData({userInfo: app.globalData.userInfo,hasUserInfo: true})} else if (this.data.canIUse){// 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回// 所以此处加入 callback 以防止这种情况app.userInfoReadyCallback = res => {this.setData({userInfo: res.userInfo,hasUserInfo: true})}} else {// 在没有 open-type=getUserInfo 版本的兼容处理wx.getUserInfo({success: res => {app.globalData.userInfo = res.userInfothis.setData({userInfo: res.userInfo,hasUserInfo: true})}})}},getUserInfo: function(e) {console.log(e)app.globalData.userInfo = e.detail.userInfothis.setData({userInfo: e.detail.userInfo,hasUserInfo: true})}})
Java后台处理代码:
import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import cn.xsshome.mvcdo.util.AesCbcUtil;import cn.xsshome.mvcdo.util.PrintUtil;import cn.xsshome.mvcdo.util.WeChatConstant;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;/*** 微信小程序code换取微信用户信息* @author 小帅丶**/@Controller@RequestMapping(value="wcsp")public class WeChatSPController {private static Logger logger = LoggerFactory.getLogger(WeChatSPController.class);/*** 获取微信小程序用户openid等信息* @param encryptedData 加密数据* @param iv 加密算法初始向量* @param code 微信小程序code码* @param request HttpServletRequest* @param response HttpServletResponse* @return String* @throws Exception*/@RequestMapping(value="/oauth")public String wxOauth(String encryptedData,String iv,String code,HttpServletRequest request,HttpServletResponse response) throws Exception{try {logger.info("请求的参数有:\n加密数据="+encryptedData+"\n加密算法初始向量="+iv+"\n微信小程序code="+code);//1.拼接code等参数换取私钥值String param = "appid="+WeChatConstant.WCSP_APPID+"&secret="+WeChatConstant.WCSP_APPSECRET+"&grant_type="+WeChatConstant.GRANT_TYPE+"&js_code="+code;String result = cn.xsshome.mvcdo.util.HttpUtil.post(WeChatConstant.JSCODE2SESSION_URL, param);logger.info("=======接口返回的数据:"+result);JSONObject jsonObject = JSON.parseObject(result);String session_key = jsonObject.get("session_key").toString();logger.info("session_key私钥值===="+session_key);//2.使用私钥值 和 算法向量值 加密的数据进行解密String userInfo = AesCbcUtil.decrypt(encryptedData, session_key, iv, "UTF-8");logger.info("解密后返回页面的数据==="+userInfo);PrintUtil.printJson(response, userInfo);} catch (Exception e) {logger.error("oauth===出错了"+e.getMessage());return null;}return null;}}
AES解密工具类（需要BC包支持文末给出）
package cn.xsshome.mvcdo.util;import mons.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.InvalidParameterSpecException;/*** AES-128-CBC 加密方式* 注：* AES-128-CBC可以自己定义“密钥”和“偏移量“。* AES-128是jdk自动生成的“密钥”。*/public class AesCbcUtil {static {//BouncyCastle是一个开源的加解密解决方案，主页在/Security.addProvider(new BouncyCastleProvider());}/*** AES解密* @param data //密文，被加密的数据* @param key //秘钥* @param iv //偏移量* @param encodingFormat //解密后的结果需要进行的编码* @return* @throws Exception*/public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {//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);try {Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");parameters.init(new IvParameterSpec(ivByte));cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化byte[] resultByte = cipher.doFinal(dataByte);if (null != resultByte && resultByte.length > 0) {String result = new String(resultByte, encodingFormat);return result;}return null;} catch (NoSuchAlgorithmException e) {e.printStackTrace();} catch (NoSuchPaddingException e) {e.printStackTrace();} catch (InvalidParameterSpecException e) {e.printStackTrace();} catch (InvalidKeyException e) {e.printStackTrace();} catch (InvalidAlgorithmParameterException e) {e.printStackTrace();} catch (IllegalBlockSizeException e) {e.printStackTrace();} catch (BadPaddingException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();}return null;}}
微信小程序index.wxml内容
<!--index.wxml--><view class="container"><view class="userinfo"><button wx:if="{{!hasUserInfo && canIUse}}" open-type="getUserInfo" bindgetuserinfo="getUserInfo"> 获取头像昵称 </button><block wx:else><image bindtap="bindViewTap" class="userinfo-avatar" src="{{userInfo.avatarUrl}}" background-size="cover"></image></block></view><view class="infos">用户昵称:<text class="userinfo-nickname">{{backUserInfo.data.nickName}}</text></view><view class="infos">用户性别:<text class="userinfo-nickname" wx:if="{{backUserInfo.data.gender}}==1">男</text><text class="userinfo-nickname" wx:elif="{{backUserInfo.data.gender}}==0">女</text><text class="userinfo-nickname" wx:else>未知</text></view><view class="infos">所在城市:<text class="userinfo-nickname">{{backUserInfo.data.city}}</text></view><view class="infos">所在省份:<text class="userinfo-nickname">{{backUserInfo.data.province}}</text></view><view class="infos">所在国家:<text class="userinfo-nickname">{{backUserInfo.data.country}}</text></view><view class="infos">用户的语言:<text class="userinfo-nickname">{{backUserInfo.data.language}}</text></view></view>
所需要的jar包
<!-- /artifact/org.bouncycastle/bcprov-jdk15 --><dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk15</artifactId><version>1.46</version></dependency>
演示效果图
后台打印的日志
加密数据=X5Ib86RrR0DbekjW1qnfSDYjcQ2fZ2e9jEzcqiHS54nW/jDPa/qUEAJAXPjB7kDAvjSVoOQ9BGPn2BGruoGyMXssDQHWAsdw9u/dlTPVLuwrKmtiBArgEpeWmYy70+DU3vCrYTFHgXLsg5KWgvXpuhgkz7lcafCr9CBTeq3uIEZ40nNfXJiMeFiQrjT/vCvK8bLWrGv5qBF1LlxlA/7Cxx8oQuAHKjXPaIMjEq+r0/wOhBV13J6n1BZF1J7A0HrtXsy1uw56wAbcJXvWx0dvrS0+Kk//P9uYzOK3+DFHxsne2P2cd1KBqWVY+gg0VWZ8wvYt/FNq9l6zM1RehHCS0Zt3nAjQebHb5IaFSMHjA4qrL21jpjoAAX6SbfgXoLDnENG2cmppqPWBCLAJ6rizTSkAc67sOm9674s4KMz7z8LJr/RIsEnGOMeMhb7ylt3vH+fMtwAA7N9B0wjD908MgtGTPvUhoags/LoqXfpm8DI=加密算法初始向量=P5ZaAJxSuDBzV6IyxKyPhw==微信小程序code=081hg8Ez1HvYBe0vDnEz1dwdEz1hg8Edresult:{"session_key":"JzWvgMpc9CoWVd7fUVhE0A==","expires_in":7200,"openid":"op5Hs0EYFmR7XvvWNrbsMFVn22Kk"}[cn.xsshome.mvcdo.controller.wechat.WeChatSPController] - =======接口返回的数据:{"session_key":"JzWvgMpc9CoWVd7fUVhE0A==","expires_in":7200,"openid":"op5Hs0EYFmR7XvvWNrbsMFVn22Kk"}[cn.xsshome.mvcdo.controller.wechat.WeChatSPController] - session_key私钥值====JzWvgMpc9CoWVd7fUVhE0A==[cn.xsshome.mvcdo.controller.wechat.WeChatSPController] - 解密后返回页面的数据==={"openId":"op5Hs0EYFmR7XvvWNrbsMFVn22Kk","nickName":"小帅丶","gender":1,"language":"zh_CN","city":"Haidian","province":"Beijing","country":"China","avatarUrl":"/mmopen/vi_32/Q0j4TwGTfTLib098UOLAHuE1fDldajSPuwR0RcPf3rxCtVicwhvdKibYFE0JNibwMwGdiagRzibdAtkSTU1fYxiaz8CIQ/0","watermark":{"timestamp":1524554676,"appid":"wxe71f579c17281234"}}
