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.login

var that = this;

wx.login({

success:function(res){

var code = res.code;//2.登录凭证code

console.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: 'http://xxxx.com/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.userInfo

this.setData({

userInfo: res.userInfo,

hasUserInfo: true

})

}

})

}

},

getUserInfo: function(e) {

console.log(e)

app.globalData.userInfo = e.detail.userInfo

this.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("=======接口返回的数据里面包含私钥值和openid:"+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;

}

}

返回session_key和openId

{

"session_key": "9EAwD4AYbo4sScCjEviHag==",

"expires_in": 7200,

"openid": "op5Hs0EYFmR7XvvWNrbsMFVn22Ks"

}

通过session_key解密后的数据(微信用户信息)

{

"openId": "op5Hs0EYFmR7XvvWNrbsMFVn22Ks",

"nickName": "小帅丶",

"gender": 1,

"language": "zh_CN",

"city": "Haidian",

"province": "Beijing",

"country": "China",

"avatarUrl": "https://wx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLib098UOLAHuE1fDldajSPuwR0RcPf3rxCtVicwhvdKibYFE0JNibwMwGdiagRzibdAtkSTU1fYxiaz8CIQ/0",

"watermark": {

"timestamp": 1524633793,

"appid": "wxe11111111111"

}

}

AES解密工具类(需要BC包支持文末给出)

package cn.xsshome.mvcdo.util;

import org.apache.commons.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http://www.bouncycastle.org/

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

获取头像昵称

用户昵称:{{backUserInfo.data.nickName}}

用户性别:男

女

未知

所在城市:{{backUserInfo.data.city}}

所在省份:{{backUserInfo.data.province}}

所在国家:{{backUserInfo.data.country}}

用户的语言:{{backUserInfo.data.language}}

所需要的jar包

org.bouncycastle

bcprov-jdk15

1.46

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=081hg8Ez1HvYBe0vDnEz1dwdEz1hg8Ed

result:{"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":"https://wx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLib098UOLAHuE1fDldajSPuwR0RcPf3rxCtVicwhvdKibYFE0JNibwMwGdiagRzibdAtkSTU1fYxiaz8CIQ/0","watermark":{"timestamp":1524554676,"appid":"wxe71f579c17281234"}}