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注意：获取openid和unionid以及手机号码的请求必须写在后台代码，微信官方不允许直接请求
新建login页面（login.wxml）
<!--pages/login/login.wxml--> <button bindtap="getOpen">获取openid</button> <button bindtap="getUnion">获取unionid</button>
login.js
getUnion:function(e) {
wx.login({
success: function (r) {
var code=r.code;
if(code){
wx.getUserInfo({
success:function(res){
wx.request({
url: 'http://localhost:8080/getUnionId.do',
method: 'POST',
header: {
'content-type': 'application/x-www-form-urlencoded',
},
data: { encryptedData: res.encryptedData, iv: res.iv, code: code },
success:function(re){
console.log(re.data);
},
fail:function(){
console.log("错误");
}
});
},
fail: function(){
wx.showModal({
title: '警告',
content: '尚未进行授权，请点击确定跳转到授权页面进行授权。',
success: function (res) {
if (res.confirm) {
wx.navigateTo({
url: 'author',
})
}
else {
wx.showToast({
title: '授权失败',
icon: 'none',
duration: 2000
})
}
}
})
}
});
}
},
fail: function () {
console.log("错误");
}
})
},
getOpen:function(e){
wx.login({
success: function (res) {
wx.request({
url: 'http://localhost:8080/getOpenId.do',
method: 'POST',
data: {
code: res.code
},
header:{
'content-type': 'application/x-www-form-urlencoded',
},
success:function(res){
console.log(res.data);
},
fail: function () {
console.log("失败");
}
})
},
fail: function () {
console.log("错误");
}
})
},
注意：获取openid不用用户授权，但unionid不行，所以必须处理授权弹窗页面
获取用户授权页面
author.wxml
<!--pages/login/author.wxml--> <button open-type="getUserInfo" bindgetuserinfo="bindGetUserInfo">授权</button>
author.js
bindGetUserInfo: function (e) {
var that = this;
var userinfo = e.detail.userInfo;
if (userinfo==null){
wx.showToast({
title: '授权失败',
icon: 'none',
duration: 2000
})
}
else{
//返回刚才的页面
wx.navigateBack({
delta: 1
})
}
},
java后台（springboot）
pom.xml jar包引入
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.55</version>
</dependency>
三大帮助类（AesUtil.java，JacksonUtil.java，WeChatUtil.java ）
AesUtil.java
import org.apache.tomcat.util.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;
public class AesUtil {
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;
}
}
JacksonUtil.java
import java.util.List;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonUtil {
private static ObjectMapper mapper = new ObjectMapper();
static {
mapper.setSerializationInclusion(Include.NON_EMPTY);
}
//json转bean
public static <T> T deserialize(String json,Class<T> cls){
T t = null;
try{
t=mapper.readValue(json, cls);
}catch (Exception ex){
return null;
}
return t;
}
public static Object getFileValue(String json,String filedName) {
try{
JsonNode rootNode = mapper.readTree(json);
return rootNode.get(filedName);
}
catch (Exception ex){
return "";
}
}
//json数组转bean
public static <T> List<T> decode(String json,Class<T> cls) {
List<T> list;
try{
JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, cls);
list=(List<T>)mapper.readValue(json, javaType);
}
catch (Exception ex){
return null;
}
return list;
}
//bean转json
public static String beanToJson(Object obj) {
String json="";
try {
json=mapper.writeValueAsString(obj);
} catch (JsonProcessingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return json;
}
//list转json
public static String listToJson(List list){
String json="";
try {
json=mapper.writeValueAsString(list);
} catch (JsonProcessingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return json;
}
}
WeChatUtil.java
import javax.net.ssl.HttpsURLConnection;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
public class WeChatUtil {
public static String httpRequest(String requestUrl,String requestMethod,String output){
try{
URL url = new URL(requestUrl);
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
if(null != output){
OutputStream outputStream = connection.getOutputStream();
outputStream.write(output.getBytes("utf-8"));
outputStream.close();
}
// 从输入流读取返回内容
InputStream inputStream = connection.getInputStream();
InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String str = null;
StringBuffer buffer = new StringBuffer();
while ((str = bufferedReader.readLine()) != null){
buffer.append(str);
}
bufferedReader.close();
inputStreamReader.close();
inputStream.close();
inputStream = null;
connection.disconnect();
return buffer.toString();
}catch(Exception e){
e.printStackTrace();
}
return "";
}
}
controller接口
import basic.JacksonUtil;
import basic.WeChatUtil;
import basic.AesUtil;
import com.fasterxml.jackson.core.JsonProcessingException;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class WeChat {
// 微信小程序ID
String appid = xxxxx";
// 微信小程序秘钥
String secret = "xxxxxxx";
@RequestMapping("/getOpenId.do")
public String getOpenId(String code) throws JsonProcessingException {
try{
// 根据小程序穿过来的code想这个url发送请求
String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + appid + "&secret=" + secret + "&js_code=" + code + "&grant_type=authorization_code";
// 发送请求，返回Json字符串
String str = WeChatUtil.httpRequest(url, "POST", null);
return str;
}
catch (Exception ex){
return null;
}
}
@RequestMapping("/getUnionId.do")
public String getUnionId(String encryptedData, String iv, String code) {
String url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + appid + "&secret=" + secret + "&js_code=" + code + "&grant_type=authorization_code";
try{
String str = WeChatUtil.httpRequest(url, "POST", null);
String session_key=JacksonUtil.getFileValue(str,"session_key").toString();
String result = AesUtil.decrypt(encryptedData, session_key, iv, "UTF-8");
return result;
}
catch (Exception ex){
return null;
}
}
}
注意：获取unionid以及手机号码的api是非个人的收费api，必须去微信开放平台申请并绑定微信小程序
原文链接：https://www.idaobin.com/archives/2294.html
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