一、准备阶段
创建小程序项目（测试号即可）
创建Java后台项目（此处为SpringBoot 普通项目）
二、前端代码
WXML 代码
<!--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}}" mode="cover"></image>
<text class="userinfo-nickname">{{userInfo.nickName}}</text>
</block>
</view>
<label>{{phone}}</label>
<button open-type="getPhoneNumber" bindgetphonenumber="getPhoneNumber"> 获取手机号码</button>
<view class="usermotto">
<text class="user-motto">{{motto}}</text>
</view>
</view>
JS 代码
//index.js
//获取应用实例
const app = getApp()
Page({
data: {
motto: ‘Hello World‘,
userInfo: {},
hasUserInfo: false,
canIUse: wx.canIUse(‘button.open-type.getUserInfo‘),
phone:""
},
//事件处理函数
bindViewTap: function() {
wx.navigateTo({
url: ‘../logs/logs‘
})
},
onLoad: function() {
var phone = wx.getStorageSync(‘phone‘);
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
})
}
})
}
this.setData({
phone: phone
});
},
getUserInfo: function(e) {
console.log(e)
app.globalData.userInfo = e.detail.userInfo
this.setData({
userInfo: e.detail.userInfo,
hasUserInfo: true
})
},
getPhoneNumber: function (e) {
console.log(e.detail.iv);
console.log(e.detail.encryptedData);
wx.login({
success: res => {
console.log(res.code);
wx.request({
url: ‘http://192.168.1.28:8070/oauth‘,
data: {
‘encryptedData‘: e.detail.encryptedData,
‘iv‘: e.detail.iv,
‘codes‘: res.code
},
method: ‘GET‘, // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT
header: {
‘content-type‘: ‘application/json‘
}, // 设置请求的 header
success: function (res) {
wx.setStorageSync(‘phone‘, res.data.phoneNumber);
wx.showToast({
title: "号码为："+res.data.phoneNumber,
icon: ‘none‘
})
},
fail: function (err) {
console.log(err);
}
})
}
})
}
})
三、后台代码
导入依赖
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk16</artifactId>
<version>1.46</version>
</dependency>
controller
package com.aes.aes.controller;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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.*;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.AlgorithmParameters;
import java.security.Security;
/**
* 微信小程序code换取微信用户信息
* @author ban__dian
*
*/
@Controller
public class HomeController {
private static Logger logger = LoggerFactory.getLogger(HomeController.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 codes 微信小程序code码
* @param request HttpServletRequest
* @param response HttpServletResponse
* @return String
* @throws Exception
*/
@GetMapping("/oauth")
@ResponseBody
public String wxOauth(String encryptedData,String iv,String codes,HttpServletRequest request,HttpServletResponse response) throws Exception{
Object res = getPhoneNumber(encryptedData,codes,iv);
logger.info(request.toString());
return res.toString();
}
public Object getPhoneNumber(String encryptedData, String code, String iv) {
//传入code后然后获取openid和session_key的，把他们封装到json里面
JSONObject json = getSessionKeyOropenid(code);
String session_key = "";
if (json != null) {
session_key = json.getString("session_key");
// 被加密的数据
byte[] dataByte = Base64.decode(encryptedData);
// 加密秘钥
byte[] keyByte = Base64.decode(session_key);
// 偏移量
byte[] ivByte = Base64.decode(iv);
try {
// 如果密钥不足16位，那么就补足. 这个if 中的内容很重要
int base = 16;
if (keyByte.length % base != 0) {
int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
byte[] temp = new byte[groups * base];
Arrays.fill(temp, (byte) 0);
System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
keyByte = temp;
}
// 初始化
Security.addProvider(new BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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, "UTF-8");
return JSONObject.parseObject(result);
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* 获取微信小程序 session_key 和 openid
*
* @param code 调用微信登陆返回的Code
* @return
*/
public static JSONObject getSessionKeyOropenid(String code) {
//微信端登录code值
String wxCode = code;
String requestUrl = "https://api.weixin.qq.com/sns/jscode2session"; //请求地址 https://api.weixin.qq.com/sns/jscode2session
Map<String, String> requestUrlParam = new HashMap<String, String>();
requestUrlParam.put("appid", "wx2f7b849acf031253"); //开发者设置中的appId
requestUrlParam.put("secret", "e8f5e6386b2a221a6760501263b93f7d"); //开发者设置中的appSecret
requestUrlParam.put("js_code", wxCode); //小程序调用wx.login返回的code
requestUrlParam.put("grant_type", "authorization_code"); //默认参数 authorization_code
//发送post请求读取调用微信 https://api.weixin.qq.com/sns/jscode2session 接口获取openid用户唯一标识
JSONObject jsonObject = JSON.parseObject(sendPost(requestUrl, requestUrlParam));
return jsonObject;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, Map<String, ?> paramMap) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
String param = "";
Iterator<String> it = paramMap.keySet().iterator();
while (it.hasNext()) {
String key = it.next();
param += key + "=" + paramMap.get(key) + "&";
}
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("Accept-Charset", "utf-8");
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(), "UTF-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
//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;
}
}
需要修改的地方
完成！
【文章转载自：https://blog.csdn.net/qq_39471272/article/details/87272170】