微信登录授权

在开发微信网页登陆授权时（如下图），由于对微信平台不熟悉，以为需要在微信开放平台新建一个网站应用以便获取Appid以及AppSecret，等提交材料审批通过后，拿Appid通过微信网页登录授权说明点击打开链接尝试操作后，发现总是提示scope错误或者无权限：





经网上查询，发现原来网页授权登录不是在微信开放平台新建应用，而是通过微信服务号进行操作，取得Appid也是微信服务号的Appid,回调地址也是在服务号中设置，这需要确保服务号有网页授权获取用户基本信息的接口权限，并填写回调地址：







相关服务开通之后，根据微信网页授权接口开发说明，一步步操作，就可以获取需要的用户信息进行相关操作，其中除了第一步是可以由用户点击操作外，其他三部都需要网站页面模拟get请求相应链接进行相关数据的获取，借网上搜寻的代码展示如下：

package com.javen.course.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import net.sf.json.JSONObject;

import com.javen.course.entity.UserInfo_weixin;
import com.javen.course.util.HttpUtil;
/**
*
* @author 简爱微萌
* @Email zyw205@gmail.com
* 接口权限中设置OAuth2.0网页授权 域名 如：www.wechat68.com
* 授权访问的URL：https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx614c453e0d1dcd12&redirect_uri=http://www.wechat68.com/Javen/OauthTest&response_type=code&scope=snsapi_userinfo&state=1#wechat_redirect
*/
public class Oauth2Servlet extends HttpServlet {
private String get_access_token_url="https://api.weixin.qq.com/sns/oauth2/access_token?" +
"appid=APPID" +
"&secret=SECRET&" +
"code=CODE&grant_type=authorization_code";
private String get_userinfo="https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";

private static final long serialVersionUID = -644518508267758016L;

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

// 将请求、响应的编码均设置为UTF-8（防止中文乱码）
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String code=request.getParameter("code");

get_access_token_url=get_access_token_url.replace("APPID", "wx614c453e0d1dcd12");
get_access_token_url=get_access_token_url.replace("SECRET", "fd00642f7a2fea32c5a7b060d9c37db1");
get_access_token_url=get_access_token_url.replace("CODE", code);

String json=HttpUtil.getUrl(get_access_token_url);

JSONObject jsonObject=JSONObject.fromObject(json);
String access_token=jsonObject.getString("access_token");
String openid=jsonObject.getString("openid");

get_userinfo=get_userinfo.replace("ACCESS_TOKEN", access_token);
get_userinfo=get_userinfo.replace("OPENID", openid);

String userInfoJson=HttpUtil.getUrl(get_userinfo);

JSONObject userInfoJO=JSONObject.fromObject(userInfoJson);

String user_openid=userInfoJO.getString("openid");
String user_nickname=userInfoJO.getString("nickname");
String user_sex=userInfoJO.getString("sex");
String user_province=userInfoJO.getString("province");
String user_city=userInfoJO.getString("city");
String user_country=userInfoJO.getString("country");
String user_headimgurl=userInfoJO.getString("headimgurl");

//    UserInfo_weixin userInfo=new UserInfo_weixin(user_openid, user_nickname, user_sex, user_province, user_city, user_country, user_headimgurl);
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
out.println("");
out.println("");
out.println("  ");
out.println("  ");
out.print("    This is ");
out.print(this.getClass());
out.println(", using the POST method \n");
out.println("openid:"+user_openid+"\n\n");
out.println("nickname:"+user_nickname+"\n\n");
out.println("sex:"+user_sex+"\n\n");
out.println("province:"+user_province+"\n\n");
out.println("city:"+user_city+"\n\n");
out.println("country:"+user_country+"\n\n");
out.println(");
out.println(">");
out.println("  ");
out.println("");
out.flush();
out.close();
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("");
out.println("");
out.println("  ");
out.println("  ");
out.print("    This is ");
out.print(this.getClass());
out.println(", using the POST method");
out.println("  ");
out.println("");
out.flush();
out.close();
}

}