springboot 微信授权网页登录操作流程

操作流程

假设你已经有自己的域名，因为微信公众号和微信回调都需要域名

先看看官方给的文档

根据官方文档，主要流程如下：

（1）引导用户进入授权页面同意授权，获取code

（2）通过code换取网页授权access_token（与基础支持中的access_token不同）

（3）刷新access_token（如果有需要）

（3）通过网页授权access_token和openid获取用户基本信息

提示：以下是本篇文章正文内容，下面案例可供参考

编写微信授权方法和获取用户信息方法

 二、使用步骤

获取微信二维码信息

代码如下（示例）：

/**
  * 公众号微信登录授权
  */
 @requestmapping("/wxlogin")
 public void wxlogin(httpservletresponse response) throws ioexception {
  //这个url的域名必须在公众号中进行注册验证，这个地址是成功后的回调地址
  string backurl = "http://7ca0c439f61c.ngrok.io/callback";//使用自己的域名
  // 第一步：用户同意授权，获取code
  //请求地址 snsapi_base snsapi_userinfo
  string url = "https://open.weixin.qq.com/connect/oauth2/authorize" +
    "?appid=" + httpclientutil.appid +
    "&redirect_uri=" + urlencoder.encode(backurl,"utf-8") +
    "&response_type=code" +
    "&scope=snsapi_userinfo" +
    "&state=state#wechat_redirect";
  logger.info("forward重定向地址{" + url + "}");
  //必须重定向，否则不能成功
  response.sendredirect(url);
 }

备注：在前端页面直接加载url 就可以出现二维码界面了。直接用的微信的页面，也可以根据自己的爱好进行设计页面
 /**
  * 公众号微信登录授权回调函数
  */
 @requestmapping("/callback")
 public userloginres callback(httpservletrequest req, httpservletresponse resp) throws servletexception, ioexception {
  userloginres userloginres = new userloginres();
  try{
   wxuserinforeq weixinuserinfo = new wxuserinforeq();
   /*start 获取微信用户基本信息*/
   string code = req.getparameter("code");
   //第二步：通过code换取网页授权access_token
   string url = "https://api.weixin.qq.com/sns/oauth2/access_token?"
     + "appid=" + httpclientutil.appid
     + "&secret=" + httpclientutil.appsecret
     + "&code=" + code
     + "&grant_type=authorization_code";
   system.out.println(url);
 
   string result = httpclientutil.doget(url);
   jsonobject jsonobject = json.parseobject(result);
 
   /*
   { "access_token":"access_token",
   "expires_in":7200,
   "refresh_token":"refresh_token",
   "openid":"openid",
   "scope":"scope" 
   }
   */
    string openid = jsonobject.getstring("openid");
    string access_token = jsonobject.getstring("access_token");
 
   //第三步验证access_token是否失效；
   string chickurl = "https://api.weixin.qq.com/sns/auth?access_token="
     + access_token + "&openid=" + openid;
   string resultinfo = httpclientutil.doget(chickurl);
   jsonobject chickuserinfo = json.parseobject(resultinfo);
   system.out.println(chickuserinfo.tostring());
   if (!"0".equals(chickuserinfo.getstring("errcode"))) {
    string refreshinfo1 = httpclientutil.doget(chickurl);
    jsonobject refreshinfo = json.parseobject(refreshinfo1);
    /*
    { "access_token":"access_token",
    "expires_in":7200,
    "refresh_token":"refresh_token",
    "openid":"openid",
    "scope":"scope" }
    */
    access_token = refreshinfo.getstring("access_token");
   }
 
   // 第四步：拉取用户信息
   string infourl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + access_token
     + "&openid=" + openid
     + "&lang=zh_cn";
   jsonobject userinfo = json.parseobject(httpclientutil.doget(infourl));
   /*
   { "openid":" openid",
   "nickname": nickname,
   "sex":"1",
   "province":"province"
   "city":"city",
   "country":"country",
   "headimgurl": "http://wx.qlogo.cn/mmopen/g3monuztnhkdmzicilibx6iafqac56vxlsufpb6n5wksyvy0chqkkiajsgq1dzutogvllrhjberqq4emsv84eavhiaiceqxibjxcfhe/46",
   "privilege":[ "privilege1" "privilege2"  ],
   "unionid": "o6_bmasdasdsad6_2sgvt7hmzopfl"
   }
   */
   system.out.println(userinfo.getstring("openid") + ":" + userinfo.getstring("nickname") +":" + userinfo.getstring("sex"));
  }catch (exception e){
   e.printstacktrace();
   userloginres.setresult("no");
   userloginres.setrtnerrid("error");
   userloginres.setrtnerrmsg(e.getmessage());
  }
  return userloginres;
 }

使用到的httpclientutil工具类

代码如下（示例）：

public class httpclientutil {
 //appid、secret为自己公众号平台的appid和secret
 public static final string appid="xxxxxxx";
 public static final string appsecret ="xxxxxxx"; 
 
 public static string doget(string url, map<string, string> param) {
  // 创建httpclient对象
  closeablehttpclient httpclient = httpclients.createdefault();
 
  string resultstring = "";
  closeablehttpresponse response = null;
  httpget httpget = null;
  try {
   // 创建uri
   uribuilder builder = new uribuilder(url);
   if (param != null) {
    for (string key : param.keyset()) {
     builder.addparameter(key, param.get(key));
    }
   }
   uri uri = builder.build();
   // 创建http get请求
   httpget = new httpget(uri);
   httpget.setheader("host", "api.weixin.qq.com");
   httpget.setheader("user-agent", "mozilla/5.0 (windows nt 6.1; wow64; trident/7.0; rv:11.0) like gecko");
   httpget.setheader("accept", "text/html, application/xhtml+xml, */*");
   httpget.setheader("accept-encoding", "gzip, deflate, br");
   httpget.setheader("connection", "keep-alive");
   httpget.setheader("accept-language", "zh-cn");
   httpget.setheader("cache-control", "no-cache");
 
   // 执行请求
   response = httpclient.execute(httpget);
   // 判断返回状态是否为200
   if (response.getstatusline().getstatuscode() == 200) {
    resultstring = entityutils.tostring(response.getentity(), "utf-8");
   }
  } catch (exception e) {
   e.printstacktrace();
  } finally {
   try {
    if (response != null) {
     response.close();
    }
    httpget.releaseconnection();
    httpclient.close();
   } catch (ioexception e) {
    e.printstacktrace();
   }
  }
  return resultstring;
 }
 
 public static string doget(string url) {
  return doget(url, null);
 }
 
 public static string dopost(string url, map<string, string> param) {
  // 创建httpclient对象
  closeablehttpclient httpclient = httpclients.createdefault();
  closeablehttpresponse response = null;
  string resultstring = "";
  try {
   // 创建http post请求
   httppost httppost = new httppost(url);
   // 创建参数列表
   if (param != null) {
    list<namevaluepair> paramlist = new arraylist<>();
    for (string key : param.keyset()) {
     paramlist.add(new basicnamevaluepair(key, param.get(key)));
    }
    // 模拟表单
    urlencodedformentity entity = new urlencodedformentity(paramlist);
    httppost.setentity(entity);
   }
   // 执行http请求
   response = httpclient.execute(httppost);
   resultstring = entityutils.tostring(response.getentity(), "utf-8");
  } catch (exception e) {
   e.printstacktrace();
  } finally {
   try {
    response.close();
   } catch (ioexception e) {
    e.printstacktrace();
   }
  }
 
  return resultstring;
 }
 
 public static string dopost(string url) {
  return dopost(url, null);
 }
 
 public static string dopostjson(string url, string json) {
  // 创建httpclient对象
  closeablehttpclient httpclient = httpclients.createdefault();
  closeablehttpresponse response = null;
  string resultstring = "";
  try {
   // 创建http post请求
   httppost httppost = new httppost(url);
   // 创建请求内容
   stringentity entity = new stringentity(json, contenttype.application_json);
   httppost.setentity(entity);
   // 执行http请求
   response = httpclient.execute(httppost);
   resultstring = entityutils.tostring(response.getentity(), "utf-8");
  } catch (exception e) {
   e.printstacktrace();
  } finally {
   try {
    response.close();
   } catch (ioexception e) {
    e.printstacktrace();
   }
  }
  return resultstring;
 }
 
 public static string dogetstr(string httpurl) {
  httpurlconnection connection = null;
  inputstream is = null;
  bufferedreader br = null;
  string result = null;// 返回结果字符串
  try {
   // 创建远程url连接对象
   url url = new url(httpurl);
   // 通过远程url连接对象打开一个连接，强转成httpurlconnection类
   connection = (httpurlconnection) url.openconnection();
   // 设置连接方式：get
   connection.setrequestmethod("get");
   // 设置连接主机服务器的超时时间：15000毫秒
   connection.setconnecttimeout(15000);
   // 设置读取远程返回的数据时间：60000毫秒
   connection.setreadtimeout(60000);
   //设置请求头
   connection.setrequestproperty("host", "api.weixin.qq.com");
   connection.setrequestproperty("user-agent", "mozilla/5.0 (windows nt 6.1; wow64; trident/7.0; rv:11.0) like gecko");
   connection.setrequestproperty("accept", "text/html, application/xhtml+xml, */*");
   connection.setrequestproperty("accept-encoding", "gzip, deflate, br");
   connection.setrequestproperty("connection", "keep-alive");
   connection.setrequestproperty("accept-language", "zh-cn");
   connection.setrequestproperty("cache-control", "no-cache");
 
   // 发送请求
   connection.connect();
   // 通过connection连接，获取输入流
   if (connection.getresponsecode() == 200) {
    is = connection.getinputstream();
    // 封装输入流is，并指定字符集
    br = new bufferedreader(new inputstreamreader(is, "utf-8"));
    // 存放数据
    stringbuffer sbf = new stringbuffer();
    string temp = null;
    while ((temp = br.readline()) != null) {
     sbf.append(temp);
     sbf.append("\r\n");
    }
    result = sbf.tostring();
   }
  } catch (malformedurlexception e) {
   e.printstacktrace();
  } catch (ioexception e) {
   e.printstacktrace();
  } finally {
   // 关闭资源
   if (null != br) {
    try {
     br.close();
    } catch (ioexception e) {
     e.printstacktrace();
    }
   }
   if (null != is) {
    try {
     is.close();
    } catch (ioexception e) {
     e.printstacktrace();
    }
   }
   connection.disconnect();// 关闭远程连接
  }
  return result;
 }
 
}

最后根据实际业务处理用户登录

//3.根据uuid查询用户是否存在，如果存在直接登录。如果不存在则自动注册，在登录
   userinfomodel userinfobywechat = iuserdao.getuserinfobywechat(userinfostr.get("unionid").tostring());
   if (userinfobywechat != null) {
    return returnmessage.success(0,"获取成功",userinfobywechat);
   }
   //4.数据库添加用户信息
   string username = userinfostr.get("nickname").tostring();
   string unionid = userinfostr.get("unionid").tostring();
   userinfobean userinfobean = new userinfobean();
   userinfobean.setuuid(unionid);
   userinfobean.setusername(username);
   // 微信登录
   userinfobean.setstatus(2);
   iuserdao.insertuser(userinfobean);
   //5.根据uuid查询新注册的用户信息
   userinfomodel userinfomodel= iuserdao.getuserinfobywechat(unionid);
   if (userinfomodel == null) {
    return returnmessage.fail(400,"用户添加失败，请重新操作");
   }

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