微信中H5页面如何获取用户openid呢?
下文笔者讲述微信开发时,web页面获取用户openid的方法分享,如下所示
实现思路:
通过获取回调页面上的code和appid
然后去请求微信API,即可获取用户的openid
例:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.net.URLEncoder"%>
<%@ page import="com.geong.util.HttpUtil"%>
<%@ page import="com.geong.util.PropertiesUtil"%>
<%@ page import="com.geong.util.GetWechatParmas"%>
<%@ page import="javax.xml.ws.Response"%>
<%@ page import="net.sf.json.JSONObject" %>
<%
//需要配置跳转地址
String jumpUrl =request.getContextPath()+"/page/index.jsp";
//以下为自动处理,不需要更改
String code = request.getParameter("code");
String rpath = PropertiesUtil.getProperty("backurl")+request.getRequestURI();
String oauth2Url = "https://open.weixin.qq.com/connect/oauth2
/authorize?appid="+PropertiesUtil.getProperty("appid")
+"&redirect_uri="+URLEncoder.encode(rpath,"UTF-8")+"&response_type=code&scope=snsapi_userinfo&
state=123#wechat_redirect";
if(code==null){
response.sendRedirect(oauth2Url);
}else{
String url = "https://api.weixin.qq.com/sns
/oauth2/access_token?appid="+PropertiesUtil.getProperty("appid")
+"&secret="+PropertiesUtil.getProperty("secret")+"&
code="+code+"&grant_type=authorization_code";
String openidResult = HttpUtil.get(url,true);
JSONObject fromObjectopenid = JSONObject.fromObject(openidResult.toString());
if(fromObjectopenid.toString().indexOf("openid")>-1){
String openid = fromObjectopenid.get("openid").toString();
session.setAttribute("openid",openid);
response.sendRedirect(jumpUrl);
}else{
response.sendRedirect(oauth2Url);
}
}
%>
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