java实现QQ互联登录

yml配置

server:
  port: 80
 
qq:
  oauth:
    http: //QQ互联中填写的网站地址

导入pom依赖

<!--httpclient-->
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.6</version>
</dependency>
<!--阿里 JSON-->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.47</version>
</dependency>

QQController

package com.ck.blog.controller;
 
import com.alibaba.fastjson.JSONObject;
import com.ck.blog.exception.StateErrorException;
import com.ck.blog.utils.QQHttpClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.net.URLEncoder;
import java.util.UUID;
 
/**
 * @author ck
 * @create 2019-05-18 20:32
 */
@Controller
public class QQController {
 
 
    @Value("${qq.oauth.http}")
    private String http;
 
    /**
     * 发起请求
     * @param session
     * @return
     */
    @GetMapping("/qq/oauth")
    public String qq(HttpSession session){
        //QQ互联中的回调地址
        String backUrl = http + "/qq/callback";
 
        //用于第三方应用防止CSRF攻击
        String uuid = UUID.randomUUID().toString().replaceAll("-","");
        session.setAttribute("state",uuid);
 
        //Step1：获取Authorization Code
        String url = "https://graph.qq.com/oauth2.0/authorize?response_type=code"+
                "&client_id=" + QQHttpClient.APPID +
                "&redirect_uri=" + URLEncoder.encode(backUrl) +
                "&state=" + uuid;
 
        return "redirect:" + url;
    }
 
    /**
     * QQ回调
     * @param request
     * @return
     */
    @GetMapping("/qq/callback")
    public String qqcallback(HttpServletRequest request) throws Exception {
        HttpSession session = request.getSession();
 
        String code = request.getParameter("code");
        String state = request.getParameter("state");
        String uuid = (String) session.getAttribute("state");
 
        if(uuid != null){
            if(!uuid.equals(state)){
                throw new StateErrorException("QQ,state错误");
            }
        }
 
 
        //Step2：通过Authorization Code获取Access Token
        String backUrl = http + "/qq/callback";
        String url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code"+
                "&client_id=" + QQHttpClient.APPID +
                "&client_secret=" + QQHttpClient.APPKEY +
                "&code=" + code +
                "&redirect_uri=" + backUrl;
 
        String access_token = QQHttpClient.getAccessToken(url);
 
        //Step3: 获取回调后的 openid 值
        url = "https://graph.qq.com/oauth2.0/me?access_token=" + access_token;
        String openid = QQHttpClient.getOpenID(url);
 
        //Step4：获取QQ用户信息
        url = "https://graph.qq.com/user/get_user_info?access_token=" + access_token +
                "&oauth_consumer_key="+ QQHttpClient.APPID +
                "&openid=" + openid;
 
        JSONObject jsonObject = QQHttpClient.getUserInfo(url);
 
        //也可以放到Redis和mysql中
        session.setAttribute("openid",openid);  //openid,用来唯一标识qq用户
        session.setAttribute("nickname",(String)jsonObject.get("nickname")); //QQ名
        session.setAttribute("figureurl_qq_2",(String)jsonObject.get("figureurl_qq_2")); //大小为100*100像素的QQ头像URL
 
 
        return "redirect:/home";
    }
 
}

QQHttpClient

package com.ck.blog.utils;
 
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
 
import java.io.IOException;
 
/**
 * @author ck
 * @create 2019-05-18 20:32
 * QQ工具类（主要用于解析QQ返回的信息）
 */
public class QQHttpClient {
    //QQ互联中提供的 appid 和 appkey
    public static final String APPID = "xxxxxxxx";
 
    public static final String APPKEY = "xxxxxxxxxx";
 
 
    private static JSONObject parseJSONP(String jsonp){
        int startIndex = jsonp.indexOf("(");
        int endIndex = jsonp.lastIndexOf(")");
 
        String json = jsonp.substring(startIndex + 1,endIndex);
 
        return JSONObject.parseObject(json);
    }
 
    public static String getAccessToken(String url) throws IOException {
        CloseableHttpClient client = HttpClients.createDefault();
        String token = null;
 
        HttpGet httpGet = new HttpGet(url);
        HttpResponse response = client.execute(httpGet);
        HttpEntity entity = response.getEntity();
 
        if(entity != null){
            String result = EntityUtils.toString(entity,"UTF-8");
            if(result.indexOf("access_token") >= 0){
                String[] array = result.split("&");
                for (String str : array){
                    if(str.indexOf("access_token") >= 0){
                        token = str.substring(str.indexOf("=") + 1);
                        break;
                    }
                }
            }
        }
 
        httpGet.releaseConnection();
        return token;
    }
 
    public static String getOpenID(String url) throws IOException {
        JSONObject jsonObject = null;
        CloseableHttpClient client = HttpClients.createDefault();
 
        HttpGet httpGet = new HttpGet(url);
        HttpResponse response = client.execute(httpGet);
        HttpEntity entity = response.getEntity();
 
        if(entity != null){
            String result = EntityUtils.toString(entity,"UTF-8");
            jsonObject = parseJSONP(result);
        }
 
        httpGet.releaseConnection();
 
        if(jsonObject != null){
            return jsonObject.getString("openid");
        }else {
            return null;
        }
    }
 
    public static JSONObject getUserInfo(String url) throws IOException {
        JSONObject jsonObject = null;
        CloseableHttpClient client = HttpClients.createDefault();
 
        HttpGet httpGet = new HttpGet(url);
        HttpResponse response = client.execute(httpGet);
        HttpEntity entity = response.getEntity();
 
 
        if(entity != null){
            String result = EntityUtils.toString(entity,"UTF-8");
            jsonObject = JSONObject.parseObject(result);
        }
 
        httpGet.releaseConnection();
 
        return jsonObject;
    }
}

原文地址：https://blog.csdn.net/weixin_42140261/article/details/95456804