java 获取用户openid_微信web开发获取用户openid

//需要配置跳转地址

String jumpUrl =request.getContextPath()+"/page/story/storyindex.jsp";

//以下为自动处理,不需要更改

String code = request.getParameter("code");

String rpath = PropertiesUtil.getProperty("yu")+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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