一.官方說明及業務流程

1.基礎配置：

參照官方文件：https://work.weixin.qq.com/api/doc/90000/90135/91025

2.企業微信掃碼登入流程：

二.具體實現

1.填寫pom檔案

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.18</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.13</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.8.0</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.74</version>
        </dependency>
    </dependencies>

2.工具類

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import
 
 org.apache.commons.io.IOUtils;

/**
 * 遠端呼叫介面
 */
public class JHttpUtils {

    public static String doGet(String url, String charset,
                               Map<Object, Object> params) {
        StringBuffer param = new StringBuffer();
        int i = 0;
        for (Object key : params.keySet()) {
            
 
if (i == 0)
                param.append("?");
            else
                param.append("&");
            param.append(key).append("=").append(params.get(key));
            i++;
        }
        url += param;
        String result = null;
        HttpClient httpClient = HttpClients.createSystem();
        try {
            HttpGet httpGet = new HttpGet(url);
            HttpResponse response = httpClient.execute(httpGet);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                InputStream instream = entity.getContent();
                result = IOUtils.toString(instream, charset);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

}

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.entity.AccessToken;
import com.entity.Result;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WeiXinQiYeUtil {

    //企業ID
    private final String corpid = "wx5e494ca5e5c0e161";

    //應用的憑證金鑰
    private final String corpsecret = "juaDSt6I-yqTXvevI38vrQtoaV3nz1FoSoNrLm2WpTk";

    //應用ID
    private final String agentId = "1000004";

    // 獲取token的url
    public  final String accessTokenUrl = "https://qyapi.weixin.qq.com/cgi-bin/gettoken";

    // 獲取使用者資訊的url
    public  final String oauth2Url = "https://qyapi.weixin.qq.com/cgi-bin/user/getuserinfo?access_token=ACCESS_TOKEN&code=CODE&agentid=AGENTID";


    /**
     * 獲取 accessToken
     * @return
     */
    public AccessToken getAccessToken() {
        Map<Object, Object> params = new HashMap<>();
        params.put("corpid", corpid);
        params.put("corpsecret", corpsecret);
        String token = JHttpUtils.doGet(accessTokenUrl, "UTF-8", params);
        AccessToken accessToken = JSON.parseObject(token, AccessToken.class);
        return accessToken;
    }


    public  String getUserId(String token, String code) {
        Result result = new Result();
        String menuUrl = oauth2Url.replace("ACCESS_TOKEN", token).replace("CODE", code).replace("AGENTID", agentId + "");
        String userinfo = JHttpUtils.doGet(menuUrl,"UTF-8", new HashMap());
        JSONObject jsonObject = JSON.parseObject(userinfo);
        return jsonObject.getString("UserId");
    }
}

3.實體類

import lombok.Data;

@Data
public class AccessToken {

    // 錯誤code
    private String errcode;

    // 錯誤msg
    private String errmsg;

    // 獲取到的憑證
    private String accessToken;

    // 憑證有效時間，單位：秒
    private int expiresIn;
}

import lombok.Data;

@Data
public class Result {

    private String UserId; //成員UserID

    private String DeviceId; //手機裝置號(由企業微信在安裝時隨機生成，刪除重灌會改變，升級不受影響)

    private String errcode; //返回碼

    private String errmsg; //對返回碼的文字描述內容

}

4.控制層

import com.entity.AccessToken;
import com.service.UserService;
import com.utils.WeiXinQiYeUtil;
import lombok.AllArgsConstructor;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;


@RestController
@AllArgsConstructor
@RequestMapping("wx")
public class WechatController {

    private final UserService userService;
    private final WeiXinQiYeUtil weiXinQiYeUtil;


    /**
     * 掃碼回撥介面
     * 實現細節：
     *      1.遠端呼叫獲取 accessToken
     *      2.遠端呼叫獲取 userId
     *      3.通過userId實現自己的業務細節
     * @param code
     * @return
     */
    @GetMapping("redirect")
    public Map<String,Object> redirect(@RequestParam(value = "code", required = true) String code){
        AccessToken accessToken =weiXinQiYeUtil.getAccessToken();
        String userId = weiXinQiYeUtil.getUserId(accessToken.getAccessToken(),code);

        //這裡模擬從資料中獲取資料
        Set<String> roles = userService.getRoles(userId);
        Set<String> menus = userService.getMenus(userId);

        Map<String,Object> result = new HashMap<>();
        result.put("roles",roles);
        result.put("menus",menus);
        return result;
    }

}

5.業務層，模擬從資料庫中拿資料

import org.springframework.stereotype.Service;

import java.util.HashSet;
import java.util.Set;

@Service
public class UserService {

    public Set<String> getRoles(String userId){
        Set<String> set = new HashSet<>();
        set.add("admin");
        set.add("test");
        return set;
    }

    public Set<String> getMenus(String userId){
        Set<String> set = new HashSet<>();
        set.add("/user");
        set.add("/role");
        set.add("/menu");
        return set;
    }
}

6.html程式碼，用來顯示二維碼

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="test" style="height:100px;width:100px;"></div>
</body>
<script>
    !function(a,b,c){function d(c){var d=b.createElement("iframe"),e="https://open.work.weixin.qq.com/wwopen/sso/qrConnect?appid="+c.appid+"&agentid="+c.agentid+"&redirect_uri="+c.redirect_uri+"&state="+c.state+"&login_type=jssdk";e+=c.style?"&style="+c.style:"",e+=c.href?"&href="+c.href:"",d.src=e,d.frameBorder="0",d.allowTransparency="true",d.scrolling="no",d.width="300px",d.height="400px";var f=b.getElementById(c.id);f.innerHTML="",f.appendChild(d),d.onload=function(){d.contentWindow.postMessage&&a.addEventListener&&(a.addEventListener("message",function(b){
        b.data&&b.origin.indexOf("work.weixin.qq.com")>-1&&(a.location.href=b.data)}),d.contentWindow.postMessage("ask_usePostMessage","*"))}}a.WwLogin=d}(window,document);

    window.WwLogin({
        "id" : "test",
        "appid" : "wx5e494ca5e5c0e161",
        "agentid" : "1000004",
        "redirect_uri" :"你的回撥介面地址",
        "state" : "weblogin@gyoss9",
        "href" : "",
    });
</script>
</html>