原生java代码实现码云第三方验证登录的示例代码

码云第三方验证登录

研究了QQ，码云，微信等第三方登录接口时，发现QQ以及微信第一步都需要验证授权管理，而且个人测试需要提供手持身份证一张，并且验证时间过长( 3天工作日左右吧 )，这样会非常浪费大家学习第三方接口登录的时间，终于， 在我的不屑努力下，找到了适合大家快速上手，测试第三方接口登录的平台-————码云（看网上帖子说某WX接入还要开发者认证，人民币300元）
码云链接地址
https://gitee.com/

一、在码云上创建应用

1、在码云上注册一个账号，点击右上角设置

2、创建应用

3、填写资料

很多同学不太了解什么是应用回调地址webhooks（第三方登录成功后，会返回到你指定的地址，并且携带验证是否成功的参数信息）

4、获取到clientId以及client Secret

clientId和client Sercret的主要作用是通过拼接得到请求地址，将地址重定向至授权登录页面

准备过程已完成

二、在项目中实现第三方登录

大概流程

1、导入依赖jar包

   <!--servlet服务-->
	<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
	<!--第三方登录插件包-->
    <dependency>
      <groupId>me.zhyd.oauth</groupId>
      <artifactId>JustAuth</artifactId>
      <version>1.3.2</version>
    </dependency>
	<!--服务器发送get，post工具包-->
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.2</version>
    </dependency>

2、跳转授权页面

AuthRequest authRequest = new AuthGiteeRequest(AuthConfig.builder()
        .clientId(CLIENT_ID) //Client ID
        .clientSecret(CLIENT_SECRET) //Client Secret
        .redirectUri(REDIRECTURI)   //回调地址
        .build());
String authorizeUrl = authRequest.authorize(AuthStateUtils.createState());
//跳转到授权页面
response.sendRedirect(authorizeUrl);

3、通过回调地址获取到code值

//http://localhost:8080/login?actionName=giteeCode&code=e063730161cd40cf&state=25c74eba2ac5f
String code = request.getParameter("code");

4、再将用户授权码发送码云服务器

补充一个小小的坑，码云第三方验证需要加上header信息，否则会报403错误

String url = "https://gitee.com/oauth/token?grant_type=authorization_code&code="+code+"&client_id="+CLIENT_ID+"&redirect_uri="+REDIRECTURI+"&client_secret="+CLIENT_SECRET;
Map<String,String> map = new HashMap<>();
map.put("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36)");
JSONObject s = HttpUtils.post(url,map);

授权登录失败会返回message错误信息，标识登录失败

成功:

{
"access_token":"e386e20327b7c4",
"refresh_token":"057c79c2d1f957a5cb4d",
"scope":"user_info",
"created_at":15488,
"token_type":"bearer",
"expires_in":86400
}

5、获取码云用户信息

通过授权码获取到的json数据，其中access_token参数，可以访问码云的用户数据

//https://gitee.com/api/v5/user?access_token=*******
String access_token = s.getString("access_token");
String url2 = "https://gitee.com/api/v5/user?access_token="+access_token;
JSONObject user = HttpUtils.get(url2,map);

//1、设置响应类型输出流
response.setContentType("application/json;charset=UTF-8");
//2、将json转为字符串
String str = JSON.toJSONString(user);
//3、得到字符输出流
response.getWriter().write(str);

源码：
在这小编要说一下回调地址操作1和回调地址操作2的区别
操作1：小编使用的是服务器的get,post发送请求，而跳转“授权页面”（giteeLogin 方法）使用的是插件，各位看主大大也可手动改为get请求，跳转第三方登录页面，具体get地址请参考
码云oauth文档
其中A和B步骤，修改后就可以不用插件代码跳转授权页面

操作2：完全使用的是JustAuth插件实现第三方登录

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.shsxt.utils.HttpUtils;
import me.zhyd.oauth.config.AuthConfig;
import me.zhyd.oauth.model.AuthCallback;
import me.zhyd.oauth.model.AuthResponse;
import me.zhyd.oauth.request.AuthGiteeRequest;
import me.zhyd.oauth.request.AuthRequest;
import me.zhyd.oauth.utils.AuthStateUtils;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;

@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    //ac85a173bb89ee
    private final String CLIENT_ID = “Client ID”
    private final String CLIENT_SECRET= “Client Secret”
    private final String REDIRECTURI = “回调地址”

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //获取用户行为
        String actionName = request.getParameter("actionName");
        //判断用户行为
        if("giteeLogin".equals(actionName)) {
            //如果发送码云授权验证
            giteeLogin(request,response);
        }else if("giteeCode".equals(actionName)) {
            //giteeCode(request,response);
           giteeCode2(request,response);
        }
        System.out.println("点击了");
    }

    /**
     * 回调地址后的操作1
     * @param request
     * @param response
     */
    private void giteeCode(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //获取code
        String code = request.getParameter("code");
        String url = "https://gitee.com/oauth/token?grant_type=authorization_code&code="+code+"&client_id="+CLIENT_ID+"&redirect_uri="+REDIRECTURI+"&client_secret="+CLIENT_SECRET;
        Map<String,String> map = new HashMap<>();
        map.put("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36)");
        JSONObject s = HttpUtils.post(url,map);
        System.out.println(s);

        //https://gitee.com/api/v5/user?access_token=*******
        String access_token = s.getString("access_token");
        String url2 = "https://gitee.com/api/v5/user?access_token="+access_token;
        JSONObject user = HttpUtils.get(url2,map);
        //1、设置响应类型输出流
        response.setContentType("application/json;charset=UTF-8");
        //2、将json转为字符串
        String str = JSON.toJSONString(user);
        //3、得到字符输出流
        response.getWriter().write(str);
    }

    /**
     * 回调地址后的操作2
     * @param request
     * @param response
     */
    private void giteeCode2(HttpServletRequest request, HttpServletResponse response) throws IOException {
      String code = request.getParameter("code");

        AuthRequest authRequest = new AuthGiteeRequest(AuthConfig.builder()
                .clientId(CLIENT_ID) //Client ID
                .clientSecret(CLIENT_SECRET) //Client Secret
                .redirectUri(REDIRECTURI)   //回调地址
                .build());

        AuthResponse json = authRequest.login(code);
        System.out.println(json);

    }

    /**
     * 跳转授权页面
     * @param request
     * @param response
     */
    private void giteeLogin(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //跳转授权页面
        AuthRequest authRequest = new AuthGiteeRequest(AuthConfig.builder()
                .clientId(CLIENT_ID) //Client ID
                .clientSecret(CLIENT_SECRET) //Client Secret
                .redirectUri(REDIRECTURI)   //回调地址
                .build());
        String authorizeUrl = authRequest.authorize();
        //跳转到授权页面
        response.sendRedirect(authorizeUrl);
    }
}

服务器发送get/post请求工具类

package com.shsxt.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;
import java.util.Set;

public class HttpUtils {
    /*
     *发送简单post请求
     */
    public static JSONObject post(String url) {
        HttpPost post = new HttpPost(url);
        return getResult(post);
    }
    /*
     *发送带Header的post请求
     */
    public static JSONObject post(String url, Map<String, String> map) {
        HttpPost post = new HttpPost(url);
        if (!map.isEmpty()) {
            Set<Map.Entry<String, String>> entrys = map.entrySet();
            for (Map.Entry<String, String> entry : entrys) {
                post.setHeader(entry.getKey(), entry.getValue());
            }
        }
        return getResult(post);
    }
    /*
     *发送带Header的get请求
     */
    public static JSONObject get(String url, Map<String, String> map) {
        HttpGet get = new HttpGet(url);
        if (!map.isEmpty()) {
            Set<Map.Entry<String, String>> entrys = map.entrySet();
            for (Map.Entry<String, String> entry : entrys) {
                get.setHeader(entry.getKey(), entry.getValue());
            }
        }
        return getResult(get);

    }
    /*
     *发送简单的get请求
     */
    public static JSONObject get(String url) {
        HttpGet get = new HttpGet(url);
        return getResult(get);

    }
    /*
     *发送请求方法，请求响应为JSONObject
     */
    private static JSONObject getResult(HttpRequestBase requestBase) {
        CloseableHttpClient httpClient = HttpClients.createDefault();

        String result = null;
        try {
            result = EntityUtils.toString(httpClient.execute(requestBase).getEntity());
            result = new String(result.getBytes("ISO-8859-1"),"utf-8");
            httpClient.close();
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        } catch (ClientProtocolException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        } finally {
            return new JSONObject(JSON.parseObject(result));
        }
    }
    /*
     *当请求响应为String时
     */
    public static String getString(String url) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpGet get = new HttpGet(url);
        String result = null;
        try {
            result = EntityUtils.toString(httpClient.execute(get).getEntity());
            httpClient.close();
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        } catch (ClientProtocolException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        } finally {
            return result;
        }
    }

}
```*当请求响应为String时
     */
    public static String getString(String url) {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpGet get = new HttpGet(url);
        String result = null;
        try {
            result = EntityUtils.toString(httpClient.execute(get).getEntity());
            httpClient.close();
        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        } catch (ClientProtocolException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        } finally {
            return result;
        }
    }
}

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