怎么用Java代码实现第三方验证登录

本篇内容主要讲解"怎么用Java代码实现第三方验证登录"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"怎么用Java代码实现第三方验证登录"吧!

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

1、导入依赖jar包

                 javax.servlet      javax.servlet-api      3.1.0                      me.zhyd.oauth      JustAuth      1.3.2                      org.apache.httpcomponents      httpclient      4.5.2    

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 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 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 map) {        HttpPost post = new HttpPost(url);        if (!map.isEmpty()) {            Set> entrys = map.entrySet();            for (Map.Entry 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 map) {        HttpGet get = new HttpGet(url);        if (!map.isEmpty()) {            Set> entrys = map.entrySet();            for (Map.Entry 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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