微信扫码登录(微信扫码登录怎么弄)

  本篇文章为你整理了微信扫码登录(微信扫码登录怎么弄)的详细内容,包含有微信扫码登录截图给别人可以登录吗 微信扫码登录怎么弄 微信扫码登录不了电脑 微信扫码登录限制怎么解除 微信扫码登录,希望能帮助你了解 微信扫码登录。

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在页面中引入js文件:https://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js

  在需要使用微信登录的地方实例js对象

  
通过调用后端的接口,将上面js对象所需要的参数返回给前端页面

  前端页面获取到所需要的参数即可生成二维码

  用户扫描二维码重定向(回调)到当前后端返回的redirect_uri

  回调成功则微信登录成功

  
application.properties添加微信登录的一些配置,其中redirect_uri应该是在申请微信登录的时候会存在一个映射关系(这里博主也不是很懂),
 

  目前微信登录支持localhost,端口应该是申请微信登录账号时设定了(博主觉得是在申请的时候天的回调地址端口有关(狗头)),后面的映射路径就是回调接口的映射路径

  
wx.open.app_secret=上面提供的AppSecret

  wx.open.redirect_uri=http://localhost:8160/api/user/wx/callback

  web.base_url=http://localhost:3000

  

 

 

  新建常量类,读取配置文件中微信的配置信息

  

import org.springframework.beans.factory.InitializingBean;

 

  import org.springframework.beans.factory.annotation.Value;

  import org.springframework.stereotype.Component;

  @Component

  public class WxConstantProperties implements InitializingBean {

   @Value("${wx.open.app_id}")

   private String appId;

   @Value("${wx.open.app_secret}")

   private String appSecret;

   @Value("${wx.open.redirect_uri}")

   private String redirectUri;

   @Value("${web.base_url}")

   private String webBaseUrl;

   public static String WX_OPEN_APP_ID;

   public static String WX_OPEN_APP_SECRET;

   public static String WX_OPEN_REDIRECT_URL;

   public static String WEB_BASE_URL;

   @Override

   public void afterPropertiesSet() throws Exception {

   WX_OPEN_APP_ID = appId;

   WX_OPEN_APP_SECRET = appSecret;

   WX_OPEN_REDIRECT_URI = redirectUri;

   WEB_BASE_URL = webBaseUrl;

  

 

  第一个接口:返回前端生成二维码的参数

  

import java.util.HashMap;

 

  @Controller

  @RequestMapping("/api/user/wx")

  public class WxApiController {

   @GetMapper("/getWxParam")

   @ResponseBody

   public Result Map String, Object getParam() {

   try {

   Map String, Object map = new HashMap ();

   map.put("appid", WxConstantProperties.WX_OPEN_APP_ID);

   // 固定值

   map.put("scope", "snsapi_login");

   String wxOpenRedirectUri = WxConstantProperties.WX_OPEN_REDIRECT_URI;

   // 应微信开放平台要求,需要使用URLEncoder规范url

   wxOpenRedirectUri = URLEncoder.encode(wxOpenRedirectUri, "utf-8");

   map.put("redirect_uri", wxOpenRedirectUri);

   // 随意值

   map.put("state", System.currentTimeMillis() + "");

   return Result.ok(map);

   } catch (Exception e) {

   e.printStackTrace();

   return Result.fail();

  

 

  前端创建两个文件

  请求后端接口的js文件

  
loginEvent.$on(loginDialogEvent, function () {

   document.getElementById("loginDialog").click();

   // 触发事件,显示登录层:loginEvent.$emit(loginDialogEvent)

   //初始化微信js(包好上面提及的登录js文件)

   const script = document.createElement(script)

   script.type = text/javascript

   script.src = https://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js

   document.body.appendChild(script)

   // 微信登录回调处理

   let self = this;

   window["loginCallback"] = (name,token, openid) = {

   self.loginCallback(name, token, openid);

   methods: {

   // 第一个接口:获取参数,生成二维码

   wxLogin() {

   // 可以忽略的文本信息

   this.dialogAtrr.showLoginType = weixin

   wxApi.getWxParam().then(response = {

   var obj = new WxLogin({

   self_redirect:true,

   id: weixinLogin, // 需要显示的容器id

   appid: response.data.appid, // 公众号appid wx*******

   scope: response.data.scope, // 网页默认即可

   redirect_uri: response.data.redirect_uri, // 授权成功后回调的url

   state: response.data.state, // 可设置为简单的随机数加session用来校验

   style: black, // 提供"black"、"white"可选。二维码的样式

   href: // 外部css文件url,需要https

   // 第二个接口:重定向到某个页面并保存cookie信息

   loginCallback(name, token, openid) {

   // 打开手机登录层,绑定手机号,改逻辑与手机登录一致

   if(openid != ) {

   this.userInfo.openid = openid

   this.showLogin()

   } else {

   this.setCookies(name, token)

   setCookies(name, token) {

   cookie.set(token, token, { domain: localhost })

   cookie.set(name, name, { domain: localhost })

   window.location.reload()

   /script

   style /style

  

 

 

  在编写第二个接口前,需要了解一个服务端向另一个服务端发送请求,往往是需要一个工具类

  

import org.apache.commons.io.IOUtils;

 

  import org.apache.commons.lang.StringUtils;

  import org.apache.http.Consts;

  import org.apache.http.HttpEntity;

  import org.apache.http.HttpResponse;

  import org.apache.http.NameValuePair;

  import org.apache.http.client.HttpClient;

  import org.apache.http.client.config.RequestConfig;

  import org.apache.http.client.config.RequestConfig.Builder;

  import org.apache.http.client.entity.UrlEncodedFormEntity;

  import org.apache.http.client.methods.HttpGet;

  import org.apache.http.client.methods.HttpPost;

  import org.apache.http.client.methods.HttpRequestBase;

  import org.apache.http.conn.ssl.SSLConnectionSocketFactory;

  import org.apache.http.conn.ssl.X509HostnameVerifier;

  import org.apache.http.entity.ContentType;

  import org.apache.http.entity.StringEntity;

  import org.apache.http.impl.client.CloseableHttpClient;

  import org.apache.http.impl.client.HttpClients;

  import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

  import org.apache.http.message.BasicNameValuePair;

  import org.apache.http.ssl.SSLContextBuilder;

  import org.apache.http.ssl.TrustStrategy;

  import javax.net.ssl.SSLContext;

  import javax.net.ssl.SSLException;

  import javax.net.ssl.SSLSession;

  import javax.net.ssl.SSLSocket;

  import java.io.IOException;

  import java.nio.charset.StandardCharsets;

  import java.security.GeneralSecurityException;

  import java.security.cert.CertificateException;

  import java.security.cert.X509Certificate;

  import java.util.ArrayList;

  import java.util.List;

  import java.util.Map;

  import java.util.Map.Entry;

  import java.util.Set;

  public class HttpClientUtils {

   public static final int CONN_TIMEOUT = 10000;

   public static final int READ_TIMEOUT = 10000;

   public static final String CHARSET = "UTF-8";

   public static final String CONTENT_TYPE = "application/x-www-form-urlencoded";

   private static HttpClient client;

   static {

   PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();

   cm.setMaxTotal(128);

   cm.setDefaultMaxPerRoute(128);

   client = HttpClients.custom().setConnectionManager(cm).build();

   public static String postParameters(String url, String params) throws Exception {

   return post(url, params, CONTENT_TYPE, CHARSET, CONN_TIMEOUT, READ_TIMEOUT);

   public static String postParameters(String url, String params, String charset, Integer connTimeout, Integer readTimeout) throws Exception {

   return post(url, params, CONTENT_TYPE, charset, connTimeout, readTimeout);

   public static String postParameters(String url, Map String, String params) throws Exception {

   return postForm(url, params, null, CONN_TIMEOUT, READ_TIMEOUT);

   public static String postParameters(String url, Map String, String params, Integer connTimeout, Integer readTimeout) throws Exception {

   return postForm(url, params, null, connTimeout, readTimeout);

   public static String get(String url) throws Exception {

   return get(url, CHARSET, null, null);

   public static String get(String url, String charset) throws Exception {

   return get(url, charset, CONN_TIMEOUT, READ_TIMEOUT);

   * 发送一个get请求

   * @param url 请求地址

   * @param charset 字符集编码

   * @param connTimeout 连接超时时间

   * @param readTimeout 响应超时时间

   * @return String

   * @throws Exception ConnectTimeoutException、SocketTimeoutException等其他异常

   public static String get(String url, String charset, Integer connTimeout, Integer readTimeout) throws Exception {

   HttpClient client = null;

   HttpGet get = new HttpGet(url);

   String result = "";

   try {

   // 设置参数

   getHttpRequestBase(get, connTimeout, readTimeout);

   // 获取响应信息

   HttpResponse res = getHttpResponse(url, get, client);

   result = IOUtils.toString(res.getEntity().getContent(), charset);

   }finally {

   get.releaseConnection();

   if (url.startsWith("https") client instanceof CloseableHttpClient) {

   ((CloseableHttpClient) client).close();

   return result;

   * 发送一个post请求

   * @param url 请求地址

   * @param body 请求体

   * @param mimeType 类似于Content-Type

   * @param charset 字符集编码

   * @param connTimeout 连接超时时间

   * @param readTimeout 响应超时时间

   * @return String

   * @throws Exception ConnectTimeoutException、SocketTimeoutException等其他异常

   public static String post(String url, String body, String mimeType, String charset, Integer connTimeout, Integer readTimeout) throws Exception {

   HttpClient client = null;

   HttpPost post = new HttpPost(url);

   String result = "";

   try {

   if(!StringUtils.isEmpty(body)) {

   HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));

   post.setEntity(entity);

   // 设置参数

   getHttpRequestBase(post, connTimeout, readTimeout);

   // 获取响应信息

   HttpResponse res = getHttpResponse(url, post, client);

   result = IOUtils.toString(res.getEntity().getContent(), charset);

   } finally {

   post.releaseConnection();

   if (url.startsWith("https") client instanceof CloseableHttpClient) {

   ((CloseableHttpClient) client).close();

   return result;

   * form表单提交方式请求

   * @param url 请求地址

   * @param params 表单参数

   * @param headers 请求头

   * @param connTimeout 连接超时时间

   * @param readTimeout 响应超时时间

   * @return String

   * @throws Exception ConnectTimeoutException、SocketTimeoutException等其他异常

   public static String postForm(String url, Map String, String params, Map String, String headers, Integer connTimeout, Integer readTimeout) throws Exception {

   HttpClient client = null;

   HttpPost post = new HttpPost(url);

   try {

   if (params != null !params.isEmpty()) {

   List NameValuePair formParams = new ArrayList ();

   Set Entry String, String entrySet = params.entrySet();

   for (Entry String, String entry : entrySet) {

   formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));

   UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);

   post.setEntity(entity);

   if (headers != null !headers.isEmpty()) {

   for (Entry String, String entry : headers.entrySet()) {

   post.addHeader(entry.getKey(), entry.getValue());

   // 设置参数

   getHttpRequestBase(post, connTimeout, readTimeout);

   // 获取响应信息

   HttpResponse res = getHttpResponse(url, post, client);

   return IOUtils.toString(res.getEntity().getContent(), String.valueOf(StandardCharsets.UTF_8));

   }finally {

   post.releaseConnection();

   if (url.startsWith("https") client instanceof CloseableHttpClient) {

   ((CloseableHttpClient) client).close();

   * 设置参数

   * @param base 协议请求对象

   * @param connTimeout 连接超时时间

   * @param readTimeout 响应超时时间

   private static void getHttpRequestBase(HttpRequestBase base, Integer connTimeout, Integer readTimeout) {

   Builder customReqConf = RequestConfig.custom();

   if(connTimeout != null) customReqConf.setConnectTimeout(connTimeout);

   if(readTimeout != null) customReqConf.setSocketTimeout(readTimeout);

   base.setConfig(customReqConf.build());

   * 获取响应信息

   * @param url 请求地址

   * @param base 协议请求对象

   * @return HttpResponse

   * @throws Exception 异常信息

   private static HttpResponse getHttpResponse(String url, HttpRequestBase base, HttpClient client) throws Exception{

   if (url.startsWith("https")) {

   // 执行 Https 请求.

   client = createSSLInsecureClient();

   } else {

   // 执行 Http 请求.

   client = HttpClientUtils.client;

   return client.execute(base);

   * 创建SSL连接供https协议请求

   * @return CloseableHttpClient

   * @throws GeneralSecurityException 安全异常

   private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {

   try {

   SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {

   @Override

   public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

   return true;

   }).build();

   SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

   @Override

   public void verify(String s, SSLSocket sslSocket) throws IOException {}

   @Override

   public void verify(String s, X509Certificate x509Certificate) throws SSLException {}

   @Override

   public void verify(String s, String[] strings, String[] strings1) throws SSLException {}

   @Override

   public boolean verify(String s, SSLSession sslSession) {

   return true;

   return HttpClients.custom().setSSLSocketFactory(sslConnectionSocketFactory).build();

   } catch (GeneralSecurityException e) {

   throw e;

   * 从 response 里获取 charset

   * @param response 响应信息

   @SuppressWarnings("unused")

   private static String getCharsetFromResponse(HttpResponse response) {

   // Content-Type:text/html; charset=GBK

   if (response.getEntity() != null response.getEntity().getContentType() != null response.getEntity().getContentType().getValue() != null) {

   String contentType = response.getEntity().getContentType().getValue();

   if (contentType.contains("charset=")) {

   return contentType.substring(contentType.indexOf("charset=") + 8);

   return null;

  

 

  第二个接口:处理扫码之后的接口(一般是获取当前扫码用户的信息)

  

@Controller

 

  @RequestMapping("/api/user/wx")

  public class WxApiController {

   @GetMapping("/callback")

   public String callback(String code, String state) {

   // 根据临时票据code和微信id及密钥请求微信固定地址,获取两个值(access_token和openid)

   StringBuffer baseAccessTokenUrl = new StringBuffer()

   .append("https://api.weixin.qq.com/sns/oauth2/access_token")

   .append("?appid=%s").append(" secret=%s")

   .append(" code=%s").append(" grant_type=authorization_code");

   String accessTokenUrl = String.format(

   baseAccessTokenUrl.toString(), ConstantWxPropertiesUtils.WX_OPEN_APP_ID,

   ConstantWxPropertiesUtils.WX_OPEN_APP_SECRET, code);

   try {

   // 使用HttpClientUtils工具类请求地址

   String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);

   JSONObject jsonObject = JSONObject.parseObject(accessTokenInfo);

   String accessToken = jsonObject.getString("access_token");

   String openid = jsonObject.getString("openid");

   // 如果数据库表中存在openid值,

   UserInfo userInfo = userInfoService.selectWxInfoOpenId(openid);

   if(userInfo == null) {

   // 根据access_token和openid获取扫码人信息

   String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +

   "?access_token=%s" + " openid=%s";

   String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);

   String userInfoResult = HttpClientUtils.get(userInfoUrl);

   JSONObject userObject = JSONObject.parseObject(userInfoResult);

   String nickname = userObject.getString("nickname");

   String headImageUrl = userObject.getString("headimgurl");

   // 信息保存到数据库中(省略)

   // 最后重定向到前端某一个页面,期间可以随带一些重要的信息

   return "redirect:" + WxConstantProperties.WEB_BASE_URL + "/weixin/callback?token=" +

   token + " openid=" + openid + " name=" + URLEncoder.encode(name, "utf-8");

   } catch (Exception e) {

   e.printStackTrace();

   return null;

  

 

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