如何实现第三方登录

1、百度搜索百度开发者中心

如何实现第三方登录

2、登陆开发者中心

如何实现第三方登录

3、如果有账号就可以直接登录,如果没有就注册一个,手机号就可以注册.

登录成功,右上方就可以出现一个,申请记录

如何实现第三方登录

4、进入百度云官网

如何实现第三方登录

5、注册成功后，点击应用管理，创建工程

如何实现第三方登录

6、创建成功后，出现这个界面

如何实现第三方登录

其中API KEY 和Secret Key，后面会用到。

7、创建成功后，出现这个界面

如何实现第三方登录

8、找到列表中的安全设置

如何实现第三方登录

授权回调页是指当在第三方登录过后，页面跳转到授权回调页界面。

根域名绑定自己申请的域名，IP地址写自己备案的服务器IP即可。

9、在eclipse中创建一个web工程，在webcontent中创建一个jsp文件叫做index

代码如下

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<script type="text/javascript">
function bdlogin(){
location.href="https://openapi.baidu.com/oauth/2.0/authorize?response_type=code&client_id=pUeLIDKF2af5sfQHLdA21D7u&redirect_uri=http://www.lijunzheworld.top/disanfang/BaiDuServelt&display=popup";
}
</script>
<body>
<input type="button" value="百度登录" onclick="bdlogin()">
</body>
</html>

注意其中的client_id为啊刚才创建的工程的API KEY，redirect_uri为百度第三方登录网站。

创建好后再创建一个名为result的jsp文件里面随便写一些内容即可，后面才会用到。

10、将web.xml中的除了index.jsp的weclome-file文件全部删除，方便以后在输入网址时直接进入index.jsp文件

11、在src在src中创建一个servelt文件。

代码如下

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

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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 com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;

public class BaiDuServelt extends HttpServlet {

private static final long serialVersionUID = 1L;

   protected void doGet(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
       doPost(request, response);
   }

   protected void doPost(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
       String code = request.getParameter("code");
       String redirect_uri = "http://www.lijunzheworld.top/disanfang/BaiDuServelt";
       String client_secret = "o9d18nDzdYqWmX5oadHfG4SbXbMnGKx7";
       String client_id = "pUeLIDKF2af5sfQHLdA21D7u";
       String url1 = "https://openapi.baidu.com/oauth/2.0/token?grant_type=authorization_code&code=" + code
               + "&client_id=" + client_id + "&client_secret=" + client_secret + "&redirect_uri=" + redirect_uri + "";

String content1 = "";

       try {
           // 创建一个HttpClient对象
           CloseableHttpClient httpClient = HttpClients.createDefault();
           // 创建一个Get请求
           HttpGet getReq = new HttpGet(url1);

           getReq.addHeader("Accept",
                   "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 ");
           getReq.addHeader("Accept-Encoding", "gzip, deflate, sdch, br");
           getReq.addHeader("Accept-Language", "zh-CN,zh;q=0.8");
           getReq.addHeader("Cache-Control", "max-age=0");
           getReq.addHeader("Connection", "keep-alive");
           getReq.addHeader("Host", "openapi.baidu.com");
           getReq.addHeader("User-Agent",
                   "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36");

HttpResponse res = httpClient.execute(getReq);

HttpEntity entity = res.getEntity();
content1 = EntityUtils.toString(entity, "UTF-8");

       } catch (Exception e) {
           e.printStackTrace();
       }

       Map<String, Object> map = JSON.parseObject(content1, new TypeReference<Map<String, Object>>() {
       });
       String access_token = (String) map.get("access_token");

print(access_token, request, response);
}

   public void print(String access_token,HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       String content = "";
       String url = "https://openapi.baidu.com/rest/2.0/passport/users/getInfo?access_token=" + access_token + "";
       try {
           // 创建一个HttpClient对象
           CloseableHttpClient httpClient = HttpClients.createDefault();
           // 创建一个Get请求
           HttpGet getReq = new HttpGet(url);

           getReq.addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 ");
           getReq.addHeader("Accept-Encoding", "gzip, deflate, sdch, br");
           getReq.addHeader("Accept-Language", "zh-CN,zh;q=0.8");
           getReq.addHeader("Cache-Control", "max-age=0");
           getReq.addHeader("Connection", "keep-alive");
           getReq.addHeader("Host", "openapi.baidu.com");
           getReq.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36");

           HttpEntity entity = httpClient.execute(getReq).getEntity();
           content = EntityUtils.toString(entity, "UTF-8");
           System.out.println(content);
       } catch (Exception e) {
           e.printStackTrace();
       }

Map<String, Object> map = JSON.parseObject(content, new TypeReference<Map<String, Object>>() {});
System.out.println(map);

       String baiduid = (String) map.get("userid");
       System.out.println(baiduid);
       //List list = JdbcUtils.getList(User.class, "select * from user where baiduid=" + baiduid);

//       if (list.size() == 0) {
       request.setAttribute("message", map);
       request.getRequestDispatcher("/result.jsp").forward(request, response);
//       } else {
//           User user = (User) list.get(0);
//           req.getSession().setAttribute("UserInfo", user);
//           req.getRequestDispatcher("/success.jsp").forward(req, res);
//       }
   }

}

如果要登陆你自己的界面的话只需要改变三个地方即可。

如何实现第三方登录