Java实现QQ第三方登录的示例代码

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

如何修改hosts文件：https://www.jb51.net/diannaojichu/319774.html

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=80
server.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;
}

回调返回参数信息说明：

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

@Controller
public 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" rel="external nofollow" >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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。