Java如何实现QQ第三方登录

前期准备工作

1.云服务器

2.备案的域名

3.本地调试需要修改hosts文件，将域名映射到127.0.0.1

申请QQ互联，并成为开发者

申请QQ互联创建应用时需要备案域名，所以建议提前准备备案域名。

QQ互联：https://connect.qq.com/index.html

登录后，点击头像，进入认证页面，填写信息，等待审核。

审核通过后创建应用

应用创建通过审核后，就可以使用App ID 和 APP Key

前期工作就这些了，后面可以开始写代码了。

项目结构：

properties或者yml配置文件（这里就是简单的配置了一下，可以自行添加数据库等配置）

server.port=80server.servlet.context-path=/ #qq互联qq.oauth.http:QQ互联中申请填写的网站地址

在pom中添加依赖

<!--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>

发送QQ登录请求

定义全局变量获取配置文件中的网站地址

@Value("${qq.oauth.http}")private String http;

定义登录回调地址（可以用网站地址拼接或者直接写）

//QQ互联中的回调地址String backUrl = http + "/index";

登录请求方法代码

@GetMapping("/qq/login")public String qq(HttpSession session) throws UnsupportedEncodingException {    //QQ互联中的回调地址    String backUrl = http + "/index";     //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, "utf-8") +            "&state=" + uuid;     return "redirect:" + url;}

正确返回示例：

JSON示例:

Content-type: text/html; charset=utf-8{"ret":0,"is_lost":0,"nickname":"Peter","gender":"男","country":"中国","province":"广东","city":"深圳","figureurl":"http://imgcache.qq.com/qzone_v4/client/userinfo_icon/1236153759.gif","is_yellow_vip":1,"is_yellow_year_vip":1,"yellow_vip_level":7,"is_yellow_high_vip": 0}

错误返回示例

Content-type: text/html; charset=utf-8{"ret":1002,"msg":"请先登录"}

用户资料的接口文档：https://wiki.open.qq.com/wiki/v3/user/get_info

请求成功，用户确认登录后回调方法

@GetMapping("/index")public String qqcallback(HttpServletRequest request, HttpServletResponse response) throws Exception {    HttpSession session = request.getSession();    //qq返回的信息    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 QQStateErrorException("QQ,state错误");        }    }      //Step2：通过Authorization Code获取Access Token    String backUrl = http + "/index";    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;     //返回用户的信息    JSONObject jsonObject = QQHttpClient.getUserInfo(url);     //也可以放到redis和MySQL中，只取出了部分数据，根据自己需要取    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     //响应重定向到home路径    return "redirect:/home";}

QQ客户端类QQHttpClient：

主要用于QQ消息返回

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; public class QQHttpClient {    //QQ互联中提供的 appid 和 appkey    public static final String APPID = "appid";     public static final String APPKEY = "appkey";      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);    }    //qq返回信息：access_token=FE04************************CCE2&expires_in=7776000&refresh_token=88E4************************BE14    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;    }    //qq返回信息：callback( {"client_id":"YOUR_APPID","openid":"YOUR_OPENID"} ); 需要用到上面自己定义的解析方法parseJSONP    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;        }    }     //qq返回信息：{ "ret":0, "msg":"", "nickname":"YOUR_NICK_NAME", ... }，为JSON格式，直接使用JSONObject对象解析    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;    }}

异常类QQStateErrorException：

public class QQStateErrorException extends Exception {    public QQStateErrorException() {        super();    }     public QQStateErrorException(String message) {        super(message);    }     public QQStateErrorException(String message, Throwable cause) {        super(message, cause);    }     public QQStateErrorException(Throwable cause) {        super(cause);    }     protected QQStateErrorException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {        super(message, cause, enableSuppression, writableStackTrace);    }}

首页controller用于跳转页面

@Controllerpublic class IndexController {     @GetMapping({"/index", "/"})    public String index(){        return "index";    }     @GetMapping("/home")    public String home(HttpSession session, Model model){        String openid = (String) session.getAttribute("openid");        String nickname = (String) session.getAttribute("nickname");        String figureurl_qq_2 = (String) session.getAttribute("figureurl_qq_2");         model.addAttribute("openid",openid);        model.addAttribute("nickname",nickname);        model.addAttribute("figureurl_qq_2",figureurl_qq_2);         return "home";    }}

还有两个简单的登录页面和信息页面

index.html

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title></head><body>    <a href="/qq/login">QQ登录</a></body></html>

home.html

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title></head><body><div>    <img th:src="${figureurl_qq_2}"></div><span th:text="${openid}"></span><span th:text="${nickname}"></span></body></html>

最后附上下载地址：https://github.com/machaoyin/qqdemo

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