微信获取openID和用户信息

版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/LONG729564606/article/details/77853308

网页获取用户信息文档说明
进入微信公众平台,接口权限—>网页服务—>网页授权—->修改—>网页授权域名设置,填写你想要的域名,并按照说明下载txt文件放到对应的域名下,接下来开始码代码

public static String codeurl = "https://open.weixin.qq.com/connect/oauth2/authorize?appid="
        + 你的appid
        + "&redirect_uri="
        + URLEncoder.encode("你想跳转到的地址")
        + "&response_type=code&scope="
        + scope
        + "&state="+state+"#wechat_redirect";

把上面的那个字符串写成二维码就可以了,我博客有相关二维码的代码,这里就不赘述了,下面这段是上面那个跳转的网页里面的代码,获取openID和用户信息的

public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        //获取微信返回的code
        String code = request.getParameter("code");
        System.out.println("code: "+code);
        String access_token = "appid="
                + 你的appid
                + "&secret="
                + 你的appid对应的secret
                + "&code="+code+"&grant_type=authorization_code";

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置日期格式
        System.out.println(df.format(new Date()));// new Date()为获取当前系统时间        

//  这段是发送get请求并获取返回结果,你可以找个get请求替换掉就行   
//我用的jsonlib的jar包
        String getopenid = HttpRequest.sendGet("https://api.weixin.qq.com/sns/oauth2/access_token", access_token);

        System.out.println("--------------------------获取openID时间  [ "+df.format(new Date())+" ] --------------------------");
        System.out.println("access_token 返回:"+getopenid);
        JSONObject fromObject = JSONObject.fromObject(getopenid);
        System.out.println("fromObject : "+fromObject);
        boolean containsKey = fromObject.containsKey("openid");

        if (!containsKey) {
            System.out.println("======获取openID失败!!");
        }
        else {


        String openid = fromObject.getString("openid");

        System.out.println("获取的openID  "+openid);
//-------------------------------------------------------
//      获取用户信息
//       https://api.weixin.qq.com/cgi-bin/user/info?      //access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN 

        String accesstoken = fromObject.getString("access_token");

        String  Unionid="access_token="+accesstoken+"&openid="+openid+"&lang=zh_CN";

        System.out.println("-----------------用户信息=---------------------");
//get方法获取用户信息
          String sendGet = HttpRequest.sendGet("https://api.weixin.qq.com/sns/userinfo", Unionid);
          System.out.println("用户信息 :  "+sendGet);
//自己解析下json串存数据库就OK了

        }
    }

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转载自blog.csdn.net/LONG729564606/article/details/77853308