关于snsapi_userinfo网页授权的说明
以snsapi_userinfo为scope发起的网页授权，是用来获取用户的基本信息的。但这种授权需要用户手动同意，并且由于用户同意过，所以无须关注，就可在授权后获取该用户的基本信息。
微信打开链接（https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx48414ee14f7d7158
&redirect_uri=http://test.cn/testWx//servlet/Oauth2Servlet&response_type=code&scope=snsapi_userinfo&state=1&connect_redirect=1#wechat_redirect）
即可看到效果，效果截图如下:
具体代码如下：（代码参考博客：http://www.cnblogs.com/zyw-205520/p/3581088.html）
Oauth2Servlet.java
package com.payroll.wx.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.payroll.wx.util.CommendDef; import com.payroll.wx.util.HttpsGetUtil; /** * Oauth2Servlet * * @author admin * @date 2015-2-27 下午04:32:55 */ public class Oauth2Servlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * snsapi_userinfo为scope发起的网页授权<br/> * 是用来获取用户的基本信息的。但这种授权需要用户手动同意，并且由于用户同意过，所以无须关注，就可在授权后获取该用户的基本信息。 */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String get_access_token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?" + "appid=" + CommendDef.AppId + "&secret=" + CommendDef.AppSecret + "&code=CODE&grant_type=authorization_code"; String get_userinfo = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN"; // 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"); System.out.println("******************code=" + code); get_access_token_url = get_access_token_url.replace("CODE", code); String json = HttpsGetUtil.doHttpsGetJson(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 = HttpsGetUtil.doHttpsGetJson(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, response.setContentType("text/html; charset=utf-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">"); out.println("<HTML>"); out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>"); out.println(" <BODY>"); out.print(" This is "); out.print(this.getClass()); out.println(", using the POST method "); out.println("openid:" + user_openid + " "); out.println("nickname:" + user_nickname + " "); out.println("sex:" + user_sex + " "); out.println("province:" + user_province + " "); out.println("city:" + user_city + " "); out.println("country:" + user_country + " "); out.println("<img src=/" + user_headimgurl + "/"); out.println(">"); out.println(" </BODY>"); out.println("</HTML>"); out.flush(); out.close(); } }
HttpsGetUtil.java
package com.payroll.wx.util; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; public class HttpsGetUtil { public static String doHttpsGetJson(String Url) { String message = ""; try { System.out.println("doHttpsGetJson");//TODO:dd URL urlGet = new URL(Url); HttpURLConnection http = (HttpURLConnection) urlGet.openConnection(); http.setRequestMethod("GET"); //必须是get方式请求 24 http.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); http.setDoOutput(true); http.setDoInput(true); System.setProperty("sun.net.client.defaultConnectTimeout", "30000");//连接超时30秒28 System.setProperty("sun.net.client.defaultReadTimeout", "30000"); //读取超时30秒29 30 http.connect(); InputStream is =http.getInputStream(); int size =is.available(); byte[] jsonBytes =new byte[size]; is.read(jsonBytes); message=new String(jsonBytes,"UTF-8"); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return message; } }