原創聲明：本文轉來源本人另一博客【http://blog.csdn.net/liaohaojian/article/details/70175835】絕非他人處轉載

從接觸公眾號到現在，開發維護了2個公眾號，開發過程中遇到很多問題，現在把部分模塊功能在這備案一下，做個總結也希望能給其他人幫助

工欲善其事，必先利其器，先看看開發公眾號需要準備或了解什么

?web開發工具：官方提供的開發工具，使用自己的微信號來調試微信網頁授權、調試、檢驗頁面的 JS-SDK 相關功能與權限，模擬大部分 SDK 的輸入和輸出。下載地址：web開發工具下載

開發文檔：https://mp.weixin.qq.com/wiki

登錄微信測試公眾號，獲取公眾號的appID、appsecret，登錄地址：http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login?（一般測試開發階段，都不拿正式公眾號測試，因為存在風險并且你調試時不用擔心影響到正式公眾號的正常使用，而且有些接口在正式公眾號上比較嚴格，而在測試公眾號上可以放開，如模板信息）

? ? 下面進入正題，實現微信網頁授權，獲取微信信息，主要用于以微信帳號作為用戶登錄，如果你只是需要綁定微信，就可以不用授權，直接請求獲取微信OpenId（對當前公眾號唯一），進行用戶綁定（在下面代碼時是寫明如何實現），該功能可在開發文檔：微信網頁開發-》微信網頁授權里查看詳細信息，下面正式開始。

1.填寫授權回調頁面域名

? ?進入測試公眾號，在體驗接口權限表中找到網頁帳號，右側添加自己的域名，測試公眾號可填寫本地IP，如你是正式公眾號只能填寫自己的域名，如果未填寫，當進行接口調用時，會提示：redirect_uri參數錯誤！如果還有其他不了解的配置，可以在開發文檔里查看詳信息，

2.代碼展示

? ? 1).調用微信接口返回的參數都是JSON格式，封裝個Http請求方法

public?class?WeixinUtil?{/***?發起https請求并獲取結果*?@param?requestUrl?請求地址*?@param?requestMethod?請求方式（GET、POST）*?@param?outputStr?提交的數據*?@return?JSONObject(通過JSONObject.get(key)的方式獲取json對象的屬性值)*/public?static?JSONObject?httpRequest(String?requestUrl,?String?requestMethod,?String?outputStr)?{JSONObject?jsonObject?=?null;StringBuffer?buffer?=?new?StringBuffer();try?{//?創建SSLContext對象，并使用我們指定的信任管理器初始化TrustManager[]?tm?=?{?new?MyX509TrustManager()?};SSLContext?sslContext?=?SSLContext.getInstance("SSL",?"SunJSSE");sslContext.init(null,?tm,?new?java.security.SecureRandom());//?從上述SSLContext對象中得到SSLSocketFactory對象SSLSocketFactory?ssf?=?sslContext.getSocketFactory();URL?url?=?new?URL(requestUrl);HttpsURLConnection?httpUrlConn?=?(HttpsURLConnection)?url.openConnection();httpUrlConn.setSSLSocketFactory(ssf);httpUrlConn.setDoOutput(true);httpUrlConn.setDoInput(true);httpUrlConn.setUseCaches(false);//?設置請求方式（GET/POST）httpUrlConn.setRequestMethod(requestMethod);if?("GET".equalsIgnoreCase(requestMethod))httpUrlConn.connect();//?當有數據需要提交時if?(null?!=?outputStr)?{OutputStream?outputStream?=?httpUrlConn.getOutputStream();//?注意編碼格式，防止中文亂碼outputStream.write(outputStr.getBytes("UTF-8"));outputStream.close();}//?將返回的輸入流轉換成字符串InputStream?inputStream?=?httpUrlConn.getInputStream();InputStreamReader?inputStreamReader?=?new?InputStreamReader(inputStream,?"utf-8");BufferedReader?bufferedReader?=?new?BufferedReader(inputStreamReader);String?str?=?null;while?((str?=?bufferedReader.readLine())?!=?null)?{buffer.append(str);}bufferedReader.close();inputStreamReader.close();//?釋放資源inputStream.close();inputStream?=?null;httpUrlConn.disconnect();jsonObject?=?JSONObject.fromObject(buffer.toString());}?catch?(ConnectException?ce)?{log.error("Weixin?server?connection?timed?out.");}?catch?(Exception?e)?{log.error("https?request?error:{}",?e);}return?jsonObject;} }

? ? 2).下面展示訪問個人中心時，進行用戶授權

/***?個人中心*?@param?request*?@param?response*?@return*/ @RequestMapping("/gotoPeopleIndex") public?String?gotoPeopleIndex(HttpServletRequest?request,HttpServletResponse?response){//判斷是否授權過，授權通過時，會保存session“WeixinUserInfo”，這樣下次訪問時，如果WeixinUserInfo存在，說明已經授權過，用戶信息已經存在WeixinUserInfo?WeixinUserInfo?=??(WeixinUserInfo)?session.getAttribute("WeixinUserInfo");if(WeixinUserInfo==null){//沒有授權過，跳轉授權頁面，如果你不需要授權，則scope為snsapi_base，這是不會彈出授權頁面String?url??=?"https://open.weixin.qq.com/connect/oauth2/authorize?appid="+TimedTask.appid+"&redirect_uri="+TimedTask.websiteAndProject+"/weixinF/getOpenInfo/gotoPeopleIndex&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";return?"redirect:"+url;}else{return?"weixin/customer/userInfo";} } /***?微信網頁授權獲得微信詳情*?@param?code*?@param?state*?@param?view?授權后調整的視圖*?@param?request*?@param?appid?公眾號appid*?@param?appsecret?公眾號appsecret*?@param?websiteAndProject??請求地址跟工程名，如我當前的為http://192.168.2.113/seafood*?@param?response*?@throws?ServletException*?@throws?IOException*/ @RequestMapping("/getOpenInfo/{view}") public?void?getOpenInfo(@RequestParam("code")?String?code,@RequestParam("state")?String?state,@PathVariable("view")?String?view,HttpServletRequest?request,HttpServletResponse?response)?throws?ServletException,?IOException{//?用戶同意授權if?(!"authdeny".equals(code))?{//獲取OpenIdOpenIdResult?open?=?WeixinUtil.getOpenId(request,?code,?TimedTask.appid,?TimedTask.appsecret);//檢驗授權憑證（access_token）是否有效int?result?=?WeixinUtil.checkAccessToken(open.getAccess_token(),?open.getOpenid());if(0?!=?result){open?=?WeixinUtil.getNewAccess_Token(open,open.getRefresh_token(),TimedTask.appid);}//?網頁授權接口訪問憑證String?accessToken?=?open.getAccess_token();String?openId?=?open.getOpenid();//獲取微信用戶詳細信息，如果你不需要授權，可跳過該步驟，直接以微信的OpenId，查找是否已經綁定，沒有跳轉到綁定界面WeixinUserInfo?user?=?WeixinUtil.getWeixinUserInfo(accessToken,?openId);Customer?customer?=?weixinFirstServer.getCustomerDetailByOpenId(user.getOpenId());if(customer!=null){if(customer.getAccountStatus()==2){response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp");}?catch?(IOException?e)?{e.printStackTrace();}return;}customer.setHeadPhoto(user.getHeadImgUrl());}else{Customer?newuser?=?new?Customer();newuser.setCustomerWeixinId(openId);newuser.setCustomerWNickname(user.getNickname());newuser.setSex(user.getSex());//綁定result?=?weixinFirstServer.addCustomerInfo(newuser);if(result<=0){response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/error.jsp");}?catch?(IOException?e)?{e.printStackTrace();}}else{customer?=?weixinFirstServer.getCustomerDetailByOpenId(user.getOpenId());if(customer.getAccountStatus()==2){response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp");}?catch?(IOException?e)?{e.printStackTrace();}return;}}}session.setAttribute("customerInfo",?customer);session.setAttribute("WeixinUserInfo",?user);request.setAttribute("state",?state);response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(TimedTask.websiteAndProject+"/weixinF/"+view);}?catch?(IOException?e)?{e.printStackTrace();}}else{response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(TimedTask.websiteAndProject+"/weixin/customer/error.jsp");}?catch?(IOException?e)?{e.printStackTrace();}} }

? ? 微信工具類代碼：

public?class?WeixinUtil?{public?final?static?String?getOpen_id_url?=?"https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";/***?檢驗授權憑證（access_token）是否有效*?@param?accessToken?憑證*?@param?openid?id*?@return*/public?static?int?checkAccessToken(String?accessToken,?String?openid)?{String?requestUrl?=?"https://api.weixin.qq.com/sns/auth?access_token="+accessToken+"&openid="+openid;JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);int?result?=?1;//?如果請求成功if?(null?!=?jsonObject)?{try?{result?=?jsonObject.getInt("errcode");}?catch?(JSONException?e)?{accessToken?=?null;//?獲取token失敗log.error("獲取token失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));}}return?result;}/***?用戶授權，使用refresh_token刷新access_token*?@return*/public?static?OpenIdResult?getNewAccess_Token(OpenIdResult?open,String?refresh_token,String?openId)?{String?requestUrl?=?getNewAccess_token.replace("REFRESH_TOKEN",?refresh_token).replace("APPID",?openId);JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);//?如果請求成功if?(null?!=?jsonObject)?{try?{open.setAccess_token(jsonObject.getString("access_token"));}?catch?(JSONException?e)?{//?獲取token失敗log.error("獲取token失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));}}return?open;}/***?獲得用戶基本信息*?@param?request?*?@param?code*?@param?appid*?@param?appsecret*?@return*/public?static?OpenIdResult?getOpenId(HttpServletRequest?request,?String?code,String?appid,?String?appsecret)?{String?requestURI?=?request.getRequestURI();String?param?=?request.getQueryString();if(param!=null){requestURI?=?requestURI+"?"+param;}String?url?=?getOpen_id_url.replace("APPID",appid).replace("SECRET",appsecret).replace("CODE",code);JSONObject?jsonObject?=?httpRequest(url,?"POST",?null);OpenIdResult?result?=?new?OpenIdResult();if?(null?!=?jsonObject)?{Object?obj?=?jsonObject.get("errcode");if?(obj?==?null)?{result.setAccess_token(jsonObject.getString("access_token"));result.setExpires_in(jsonObject.getString("expires_in"));result.setOpenid(jsonObject.getString("openid"));result.setRefresh_token(jsonObject.getString("refresh_token"));result.setScope(jsonObject.getString("scope"));}else{System.out.println("獲取openId回執："+jsonObject.toString()+"訪問路徑："+requestURI);log.error("訪問路徑:"+requestURI);log.error("獲取openId失敗?errcode:{}?errmsg:{}",?jsonObject.getInt("errcode"),?jsonObject.getString("errmsg"));}}return?result;}/***?通過網頁授權獲取用戶信息*?@param?accessToken?網頁授權接口調用憑證*?@param?openId?用戶標識*?@return?WeixinUserInfo*/public?static?WeixinUserInfo?getWeixinUserInfo(String?accessToken,?String?openId)?{WeixinUserInfo?user?=?null;//?拼接請求地址String?requestUrl?=?"https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID";requestUrl?=?requestUrl.replace("ACCESS_TOKEN",?accessToken).replace("OPENID",?openId);//?通過網頁授權獲取用戶信息JSONObject?jsonObject?=?httpRequest(requestUrl,?"GET",?null);if?(null?!=?jsonObject)?{try?{user?=?new?WeixinUserInfo();//?用戶的標識user.setOpenId(jsonObject.getString("openid"));//?昵稱user.setNickname(jsonObject.getString("nickname"));//?性別（1是男性，2是女性，0是未知）user.setSex(jsonObject.getInt("sex"));//?用戶所在國家user.setCountry(jsonObject.getString("country"));//?用戶所在省份user.setProvince(jsonObject.getString("province"));//?用戶所在城市user.setCity(jsonObject.getString("city"));//?用戶頭像user.setHeadImgUrl(jsonObject.getString("headimgurl"));//?用戶特權信息user.setPrivilegeList(JSONArray.toList(jsonObject.getJSONArray("privilege"),?List.class));}?catch?(Exception?e)?{user?=?null;int?errorCode?=?jsonObject.getInt("errcode");String?errorMsg?=?jsonObject.getString("errmsg");log.error("獲取用戶信息失敗?errcode:{}?errmsg:{}，reqUrl{}",?errorCode,?errorMsg);}}return?user;} }

? ? 下面展示，當用戶session失效時，自動登錄的代碼，這時是不需要授權的

@RequestMapping("/gotoGoodsView") public?String?gotoGoodsView(@RequestParam(value="longitude",defaultValue="",required=false)?String?longitude,@RequestParam(value="latitude",defaultValue="",required=false)?String?latitude){String?param?=?request.getQueryString();String?url?=?request.getServletPath();if(param!=null){url?=?url+"?"+param.replaceAll("&","-");//如果不把&替換成別的，當重新登錄成功后調整會參數丟失}Customer?customerInfo?=?(Customer)?session.getAttribute("customerInfo");if(customerInfo==null){//session失效，跳轉到獲取微信詳情頁面（授權）return?"redirect:/weixinF/getCode?view="+TimedTask.websiteAndProject+"/weixinF/autoLogin&view2="+TimedTask.websiteAndProject+url;}return?"/weixin/customer/goodsList"; } @RequestMapping("/getCode") public?void?getCode(HttpServletResponse?response){String?view??=?request.getParameter("view");//獲取openId的路徑String?view2??=?request.getParameter("view2");//獲取openId成功后跳轉的路徑String?redirect_url?=?"";try?{redirect_url?=?URLEncoder.encode(view,"UTF-8");if(view2!=null?&&?!"".equals(view2)){view2?=?view2.replaceAll("-","&");redirect_url?=?redirect_url?+"?redirect_url="+?URLEncoder.encode(URLEncoder.encode(view2,"UTF-8"),"UTF-8");}}?catch?(UnsupportedEncodingException?e1)?{e1.printStackTrace();}String?url?=?WeixinUtil.getCode_url.replace("APPID",TimedTask.appid).replace("REDIRECT_URI",redirect_url);response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(url);}?catch?(IOException?e)?{e.printStackTrace();} } /***?自動登錄并跳轉*?@param?code*?@param?appid?公眾號appid*?@param?appsecret?公眾號appsecret*?@param?websiteAndProject??請求地址跟工程名，如我當前的為http://192.168.2.113/seafood*?@param?url?自動登錄后跳轉路徑*?@return*/ @RequestMapping("/autoLogin") public?String?autoLogin(HttpServletResponse?response,@RequestParam(value="code",defaultValue="")?String?code,@RequestParam(value="redirect_url",defaultValue="")?String?url){OpenIdResult?open?=?WeixinUtil.getOpenId(request,code,TimedTask.appid,TimedTask.appsecret);//根據Code獲取OpenId//根據OpenId查找是否有該客戶，沒有進行綁定Customer?customerInfo?=?weixinFirstServer.getCustomerDetailByOpenId(open.getOpenid());if(customerInfo!=null){if(customerInfo.getAccountStatus()==2){//用戶賬戶是否正常return?"redirect:"+TimedTask.websiteAndProject+"/weixin/customer/noAuthority.jsp";}session.setAttribute("customerInfo",?customerInfo);//把用戶信息存在session中response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(url);}?catch?(IOException?e)?{e.printStackTrace();}return?null;}else{url=?url.replaceAll("&","-");url?=?url.replace(TimedTask.websiteAndProject,"");String?redirectUrl??=?"https://open.weixin.qq.com/connect/oauth2/authorize?appid="+TimedTask.appid+"&redirect_uri="+TimedTask.websiteAndProject+"/weixinF/getOpenInfoRedirectAction?actionName="+url+"&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";response.setContentType("text/html;?charset=UTF-8");try?{response.sendRedirect(redirectUrl);}?catch?(IOException?e)?{e.printStackTrace();}return?null;} }

? ? 到此，微信網頁授權認證，與session失效自動登錄已經完成，如果有問題歡迎在評論區指出

轉載于:https://blog.51cto.com/banshanxianren/1916240

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