H5页面获取微信用户信息操作流程

• （一）获取微信权限，由微信用户确认
• （二）获取相应的ACCESS_TOKEN和OPENID信息
• （三）根据ACCESS_TOKEN和OPENID信息获取相应的用户信息

（一）获取微信权限，由微信用户确认

首先需要准备相应的微信公众号信息，比如appid、appsecret；并且添加当前H5页面的域名地址到微信公众号的“网页授权获取用户基本信息”设置中

设置相应的域名信息

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
	throws ServletException, IOException {
	this.doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
	throws ServletException, IOException {
	String qudao= req.getParameter("qudao") == null ? "" : req.getParameter("qudao");
	if(JiveGlobals.isEmpty(qudao)){
		qudao = "2";    //公众号
	}
	//微信公众号appid
	String appid = "wx333333333333c333";
	//微信认证通过后跳转地址，用户获取微信code等信息继续获取ACCESS_TOKEN和OPENID并获取相应用户信息
	String tzdz = "http://******/web/oauth";
				
	resp.sendRedirect("https://open.weixin.qq.com/connect/oauth2/authorize?appid="+appid+"&redirect_uri="+tzdz+"?response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect&c="+qudao);
}

（二）获取相应的ACCESS_TOKEN和OPENID信息

微信认证通过后跳转到当前页面，通过code等信息继续获取ACCESS_TOKEN和OPENID

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
	throws ServletException, IOException {
	this.doPost(req, resp);
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
	throws ServletException, IOException {
			
	//得到code
	String CODE = req.getParameter("code");
	String APPID = "wx333333333333c333";    //公众号appid
	String SECRET = "ab5555555555cd55555555555555be"; //公众号SECRET
	//换取access_token 其中包含了openid
	String URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code".replace("APPID", APPID).replace("SECRET", SECRET).replace("CODE", CODE);
	GetMethod get = new GetMethod(URL);
	get.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8"); 
	String jsonStr = "";
	HttpClient httpclient = new HttpClient();
	try {
	httpclient.executeMethod(get);
	jsonStr = get.getResponseBodyAsString();
	} catch (Exception e) {
	System.out.println(e);
	}
	JSONObject jsonObj = JSONObject.fromObject(jsonStr);
	String openid = jsonObj.get("openid").toString();
	String access_token = jsonObj.get("access_token").toString();
}

（三）根据ACCESS_TOKEN和OPENID信息获取相应的用户信息

微信返回用户信息JSON：

{   
  "openid": "OPENID",
  "nickname": NICKNAME,
  "sex": 1,
  "province":"PROVINCE",
  "city":"CITY",
  "country":"COUNTRY",
  "headimgurl":"https://thirdwx.qlogo.cn/mmopen/g3MonUZtNHkdmzicIlibx6iaFqAc56vxLSUfpb6n5WKSYVY0ChQKkiaJSgQ1dZuTOgvLLrhJbERQQ4eMsv84eavHiaiceqxibJxCfHe/46",
  "privilege":[ "PRIVILEGE1" "PRIVILEGE2"     ],
  "unionid": "o6_bmasdasdsad6_2sgVt7hMZOPfL"
}

调用微信接口获取用户信息：

//当上一个页面跳转微信获取scope=snsapi_userinfo权限后可以获取用户昵称头像等信息
String userURL = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN".replace("ACCESS_TOKEN", access_token).replace("OPENID", openid);
        
GetMethod userGet = new GetMethod(userURL);
get.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8"); 
String userjsonStr = "";
try {
httpclient.executeMethod(userGet);
userjsonStr = userGet.getResponseBodyAsString();
} catch (Exception e) {
System.out.println(e);
}
JSONObject userjsonObj = JSONObject.fromObject(userjsonStr);
String nickname = String.valueOf(userjsonObj.get("nickname"));
//乱码昵称转码得到正确的昵称
nickname = new String(nickname.getBytes("ISO-8859-1"), "UTF-8");
//微信头像地址
String headimgurl = userjsonObj.get("headimgurl").toString();