java实现QQ登录

项目结构

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

<dependency>

<groupid>org.apache.httpcomponents/<groupid>

<artifactid>httpclient/<artifactid>

<version>4.5.6/<version>

<dependency>

<groupid>com.alibaba/<groupid>

<artifactid>fastjson/<artifactid>

<version>1.2.47/<version>

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();

//qq返回的信息：http://graph.qq.com/demo/index.jsp?code=9A5F************************06AF&state=test

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);

}

//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;

}

}

IndexController

package com.ck.blog.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.GetMapping;

import javax.servlet.http.HttpSession;

/**

* @author ck

* @create 2019-05-18 20:31

*/

@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";

}

}

index.html

<title>登录页/<title>

home.html

<title>QQ授权成功/<title>

效果图

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原文链接：https://blog.csdn.net/qq_37618797/article/details/90344835