微信公众号开发 授权 获取openId

package com.mingshine.cloudguardian.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.mingshine.cloudguardian.service.WXService;
import com.mingshine.cloudguardian.utils.common.CheckoutUtil;
import com.mingshine.cloudguardian.utils.wx.MessageUtil;
import com.mingshine.cloudguardian.utils.wx.NetUtil;

@RestController
@RequestMapping("/wechat")
public class WeChatController {
  private Logger log = LoggerFactory.getLogger(MyDeviceController.class);
  private static final String APP_ID = "wx3dd909f863ce675c";
  private static final String APP_SECRET = "954f34bedfbe6227a14275cf9eaf2ea1";
  private static final String URL_LOGIN = "http://192.168.1.100:8888/";
  @Resource
  private WXService mWXService;

  /**
   * 微信消息接收和token验证
   * 
   * @param request
   * @param response
   * @throws IOException
   */
  @RequestMapping("/weChatToken")
  public void weChat(HttpServletRequest request, HttpServletResponse response)
      throws IOException {
    // 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");
    boolean isGet = request.getMethod().toLowerCase().equals("get");
    if (isGet) {
      // 微信加密签名
      String signature = request.getParameter("signature");
      // 时间戳
      String timestamp = request.getParameter("timestamp");
      // 随机数
      String nonce = request.getParameter("nonce");
      // 随机字符串
      String echostr = request.getParameter("echostr");
      // 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败
      if (signature != null
          && CheckoutUtil.checkSignature(signature, timestamp, nonce)) {
        try {
          PrintWriter print = response.getWriter();
          print.write(echostr);
          print.flush();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    } else {
      // xml请求解析
      try {
        Map<String, String> requestMap = MessageUtil.xml2Map(request);
        mWXService.handler(response, requestMap);
        System.out.println(JSON.toJSONString(requestMap));
      } catch (Exception e) {
        e.printStackTrace();
      }

    }
  }

  @RequestMapping("/getOAuth")
  public String getOAuth(HttpServletRequest request,
      HttpServletResponse response) {
    String code = request.getParameter("code");
    JSONObject oauth2TokenJson = getOauth2Token(APP_ID, APP_SECRET, code);
    log.info(oauth2TokenJson.toJSONString());
    log.info(oauth2TokenJson.getString("openid"));
    try {
      response.sendRedirect(URL_LOGIN);
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * 获取网页授权凭证
   * 
   * @param appId
   *            公众账号的唯一标识
   * @param appSecret
   *            公众账号的密钥
   * @param code
   * @return
   */
  private JSONObject getOauth2Token(String appId, String appSecret,
      String code) {
    String requestUrl = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
    requestUrl = requestUrl.replace("APPID", appId);
    requestUrl = requestUrl.replace("SECRET", appSecret);
    requestUrl = requestUrl.replace("CODE", code);
    String respStr = NetUtil.get(requestUrl);
    return JSON.parseObject(respStr.trim());
  }

}

获取openid 连接

https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx3dd909f863ce675c&redirect_uri=http%3a%2f%2fzhaoyunwsx.xicp.net%2f%2fcloud-guardian%2fwechat%2fgetOAuth&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect