? ? ? ? 最近有做了關(guān)于微信公眾號和自己網(wǎng)站用戶進行用戶關(guān)聯(lián)授權(quán)登錄的一個功能，主要是用戶關(guān)注該公眾號，點擊會員中心，則會彈出需要關(guān)聯(lián)授權(quán)的網(wǎng)頁授權(quán)：OAuth2.0網(wǎng)頁授權(quán)，然后用戶同意獲取用戶信息，進行用戶和網(wǎng)站的關(guān)聯(lián)，然后用戶則可以使用微信進行登錄。

??????? 本次做的是一個在Java的Action層處理各個返回參數(shù)獲取數(shù)據(jù)。

???????一、 使用到的工具：

??????????? 1、ngrok，將你自己的本機映射到公網(wǎng)，這樣保證可以隨時測試開發(fā)；

?????????????????? 1、下載ngrok，網(wǎng)址：http://www.tunnel.mobi/

???????????????????2、將文件放到Tomcat目錄下，在cmd中運行ngrok -config ngrok.cfg -subdomain xinzhi 8080

?????????????????? 3、ngrok工具為在慕課網(wǎng)@LAOBI 看到的

??????????? 2、微信公眾號測試賬號，隨時測試，首先保證在測試賬號下沒有問題后在進行公眾號的移植。

?????? 二、使用到在Java中發(fā)送一個Http請求，然后返回JSON參數(shù)，獲得JSON參數(shù)，然后進行處理。

?????????? 首先，獲取將公眾號測試號放到properties文件中，以便我們進行調(diào)用或者更換,如：url請用https

Properties代碼 ?

AppID?=?wxf00**c3dd2ebfa0??
AppSecret?=?3cb220755f****506dc35391aa5c03ec??
url?=?https://xinzhi.tunnel.mobi

?????????? 這里url為我們映射到外網(wǎng)的地址，一會需要用到。然后需要兩個工具類，該工具類作用是在Java的Action中發(fā)送http請求后獲取到去返回值

? ? ? ? ? ?啟用自己有相應的改動，以適應本項目的需求：

?????????? WeixinUtil.java 和 MyX509TrustManager.java

Java代碼 ?

package?com.zhtx.common.util;??
import?java.io.BufferedReader;??
import?java.io.InputStream;??
import?java.io.InputStreamReader;??
import?java.io.OutputStream;??
import?java.net.ConnectException;??
import?java.net.URL;??
import?javax.net.ssl.HttpsURLConnection;??
import?javax.net.ssl.SSLContext;??
import?javax.net.ssl.SSLSocketFactory;??
import?javax.net.ssl.TrustManager;??
import?org.slf4j.Logger;??
import?org.slf4j.LoggerFactory;??
/**
?*?公眾平臺通用接口工具類
?*?
?*?@author?xinz
?*?@date?2015-10-14
?*/
public?class?WeixinUtil?{??
????private?static?Logger?log?=?LoggerFactory.getLogger(WeixinUtil.class);??
????/**
?????*?發(fā)起https請求并獲取結(jié)果
?????*?
?????*?@param?requestUrl?請求地址
?????*?@param?requestMethod?請求方式（GET、POST）
?????*?@param?outputStr?提交的數(shù)據(jù)
?????*?@return?JSONObject(通過JSONObject.get(key)的方式獲取json對象的屬性值)
?????*/
????public?static?String?httpRequest(String?requestUrl,?String?requestMethod,?String?outputStr)?{??
????????StringBuffer?buffer?=?new?StringBuffer();??
????????try?{??
????????????//?創(chuàng)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(shè)置請求方式（GET/POST）
????????????httpUrlConn.setRequestMethod(requestMethod);??
????????????if?("GET".equalsIgnoreCase(requestMethod))??
????????????????httpUrlConn.connect();??
????????????//?當有數(shù)據(jù)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(zhuǎn)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();??
????????}?catch?(ConnectException?ce)?{??
????????????log.error("Weixin?server?connection?timed?out.");??
????????}?catch?(Exception?e)?{??
????????????log.error("https?request?error:{}",?e);??
????????}??
????????return?buffer.toString();??
????}??
}

?對于https請求，我們需要一個證書信任管理器，這個管理器類需要自己定義，但需要實現(xiàn)X509TrustManager接口，代碼如下:

Java代碼 ?

package?com.zhtx.common.util;??
import?java.security.cert.CertificateException;??
import?java.security.cert.X509Certificate;??
import?javax.net.ssl.X509TrustManager;??
/**
?*?證書信任管理器（用于https請求）
?*?
?*?@author?xinz
?*?@date?2015-10-14
?*/
public?class?MyX509TrustManager?implements?X509TrustManager?{??
????public?void?checkClientTrusted(X509Certificate[]?chain,?String?authType)?throws?CertificateException?{??
????}??
????public?void?checkServerTrusted(X509Certificate[]?chain,?String?authType)?throws?CertificateException?{??
????}??
????public?X509Certificate[]?getAcceptedIssuers()?{??
????????return?null;??
????}??
}

?微信返回參數(shù)的一個POJO類：

Java代碼 ?

private?String??openid;??//用戶的唯一標識?
private?String??nickname;//用戶昵稱?
private?Integer?sex;//?用戶的性別，值為1時是男性，值為2時是女性，值為0時是未知?
private?String??province;//用戶個人資料填寫的省份?
private?String??city;//普通用戶個人資料填寫的城市?
private?String??country;//?國家，如中國為CN?
private?String??headimgurl;??//?用戶頭像，最后一個數(shù)值代表正方形頭像大小（有0、46、64、96、132數(shù)值可選，0代表640*640正方形頭像），用戶沒有頭像時該項為空。若用戶更換頭像，原有頭像URL將失效。?
private?String??privilege;//?用戶特權(quán)信息，json?數(shù)組，如微信沃卡用戶為（chinaunicom）?
private?String??unionid;//?只有在用戶將公眾號綁定到微信開放平臺帳號后，才會出現(xiàn)該字段。詳見：獲取用戶個人信息（UnionID機制）?
private?String?access_token;

?授權(quán)憑證驗證的類：

Java代碼 ?

private?String?errcode;??
private?String?errmsg;

?通過code換取網(wǎng)頁授權(quán)access_token

Java代碼 ?

private?String?access_token;??
private?String?expires_in;??
private?String?refresh_token;??
private?String?openid;??
private?String?scope;??
private?String?unionid;

?關(guān)于微信頭像的，獲取的是一個http的url，則需要將圖片下載到服務(wù)器存儲，然后獲得相對路徑：

Java代碼 ?

/**
?????*?使用url或者http存入文件
?????*?@Title:?fileUpload
?????*?@param?@param?fileUrl??文件url，可以是http
?????*?@param?@param?path?????文件存儲路徑
?????*?@return?void
?????*?@throws?xinz
?????*/
????public?static?void?fileUpload?(String?fileUrl,String?path){??
?????????//讀取文件
??????????String?s1?=?fileUrl;?????
??????????java.io.InputStream?is?=?null;?//定義一個輸入流。
??????????BufferedInputStream?bis?=?null;//定義一個帶緩沖的輸入流?。?
????????//寫到本地?
??????????BufferedOutputStream?bos?=?null;?//定義一個帶緩沖的輸出流。
??????????try{???
????????????java.net.URL?url?=?new?java.net.URL(s1);//創(chuàng)建一個URL對象。
????????????is?=?url.openStream();//打開到此?URL?的連接并返回一個用于從該連接讀入的?InputStream。
????????????bis?=?new?java.io.BufferedInputStream(is);???????
????????????File?file?=?new?File(path);?????
????????????if(!file.exists()){?//測試此抽象路徑名表示的文件或目錄是否存在。??
????????????????file.createNewFile();???//創(chuàng)建此抽象路徑名表示的文件或目錄。
????????????}?????
??????????bos?=?new?BufferedOutputStream(new?FileOutputStream(file));;???????
??????????byte[]?b?=?new?byte[1024];?//創(chuàng)建字節(jié)數(shù)組。
??????????while(bis.read(b)!=-1){//輸入流中的數(shù)據(jù)如果還有下一行(!=-1)將繼續(xù)循環(huán)
??????????????bos.write(b);//將字節(jié)數(shù)組寫入輸出流。????
??????????}???
??????????}catch(Exception???e){???????
??????????????System.out.println(e.toString());?????????
??????????}finally{???????
??????????????try{???????
??????????????????bos.flush();//刷新此緩沖的輸出流。?
??????????????????bis.close();?//關(guān)閉此輸入流?。?
??????????????}catch(Exception???e){???????
??????????????????System.out.println(e.toString());?????????
??????????????}???????
??????????}????
????}

現(xiàn)在是基礎(chǔ)工作都做完了，現(xiàn)在開發(fā)代碼的開發(fā)，然后我們按照這個步驟開發(fā)：

第一步：用戶同意授權(quán)，獲取code

? 這里的url就是前面所準備在properties中的url了。

Java代碼 ?

/**
?????*?微信用戶授權(quán)
?????*?@Title:?wechatOauth
?????*?@param?@param?request
?????*?@param?@param?response
?????*?@param?@param?model
?????*?@param?@return
?????*?@return?String
?????*?@throws?xinz
?????*/
????@RequestMapping("wechatOauth")??
????public?String?wechatOauth(HttpServletRequest?request,HttpServletResponse?response,Model?model)??{??
????????/**
?????????*??1?第一步：用戶同意授權(quán)，獲取code
?????????*/
????????//首先拿到微信公眾號的AppID、AppSecret等參數(shù)
????????String?AppID?=?ZhtxHelper.getApplicationResourcesProp("sendSms","AppID");??
????????String?urlOpen?=?ZhtxHelper.getApplicationResourcesProp("sendSms","url");??
????????//如果用戶授權(quán)成功則跳轉(zhuǎn)到此url
????????String?loginUrl?=?""+urlOpen+"/zhtx-wap/weixin/getAccessToken";??
????????//用戶授權(quán)，獲取code
????????String?url?=?"https://open.weixin.qq.com/connect/oauth2/authorize?"
????????????????????+?"appid="+AppID+""
????????????????????+?"&redirect_uri="+loginUrl+""
????????????????????+?"&response_type=code"
????????????????????+?"&scope=snsapi_userinfo"
????????????????????+?"&state=123#wechat_redirect";??
????????//forward?redirect
????????return?"redirect:"+url+"";???
????}

第二步：通過code換取網(wǎng)頁授權(quán)access_token

Java代碼 ?

/**
?????*?通過code換取網(wǎng)頁授權(quán)access_token
?????*?@Title:?getAccessToken
?????*?@param?@param?request
?????*?@param?@param?response
?????*?@param?@param?model
?????*?@param?@return
?????*?@return?String
?????*?@throws?xinz
?????*/
????@RequestMapping("getAccessToken")??
????public?String?getAccessToken(HttpServletRequest?request,HttpServletResponse?response,Model?model)?{??
????????//獲取到返回的參數(shù)
????????try?{??
????????????//首先拿到微信公眾號的AppID、AppSecret等參數(shù)
????????????String?AppID?=?ZhtxHelper.getApplicationResourcesProp("sendSms","AppID");??
????????????String?AppSecret?=?ZhtxHelper.getApplicationResourcesProp("sendSms","AppSecret");??
????????????String?code?=?request.getParameter("code");??
????????????String?url?=?null;??
????????????if(code!=null){??
????????????????/**
?????????????????*??2?第二步：通過code換取網(wǎng)頁授權(quán)access_token
?????????????????*/
????????????????//用戶授權(quán)，獲取code
????????????????url?=?"https://api.weixin.qq.com/sns/oauth2/access_token?"
????????????????????????+?"appid="+AppID+""
????????????????????????+?"&secret="+AppSecret+""
????????????????????????+?"&code="+code+""
????????????????????????+?"&grant_type=authorization_code";??
????????????????String?requestMethod?=?"GET";??
????????????????String?outputStr?=?"";??
????????????????String?httpRequest?=?WeixinUtil.httpRequest(url,?requestMethod,?outputStr);??
????????????????System.out.println("通過code換取網(wǎng)頁授權(quán)access_token="+httpRequest);??
????????????????AccessTokenModel?accTok?=?JSON.parseObject(httpRequest,?AccessTokenModel.class);??
????????????????/**
?????????????????*??4?第四步：拉取用戶信息(需scope為?snsapi_userinfo)
?????????????????*/
????????????????//用戶授權(quán)，獲取code
????????????????String?urlUser?=?"https://api.weixin.qq.com/sns/userinfo?"
????????????????????????+?"access_token="+accTok.getAccess_token()+""
????????????????????????+?"&openid="+accTok.getOpenid()+""
????????????????????????+?"&lang=zh_CN";??
????????????????String?httpUser?=?WeixinUtil.httpRequest(urlUser,?requestMethod,?outputStr);??
????????????????System.out.println("拉取用戶信息=="+httpUser);??
????????????????WechatUser?wechatUser?=?JSON.parseObject(httpUser,?WechatUser.class);??
????????????????wechatUser.setAccess_token(accTok.getAccess_token());??
????????????????/**
?????????????????*??5?附：檢驗授權(quán)憑證（access_token）是否有效
?????????????????*/
????????????????WechatMsg?checkAccessToken?=?checkAccessToken(wechatUser.getAccess_token(),?wechatUser.getOpenid());??
????????????????if(checkAccessToken.getErrcode().equals("0")){??
????????????????????CurrentSession.setAttribute("wechatUser",?wechatUser);??
????????????????????WechatUser?wechatU?=?new?WechatUser();??
????????????????????wechatU.setOpenid(wechatUser.getOpenid());??
????????????????????List<WechatUser>?findWechatUser?=?wechatUserService.findWechatUser(wechatU);??
????????????????????if(findWechatUser.size()>0){??
????????????????????????UserRegister?userRegister?=?userService.findUserByOpenid(wechatUser.getOpenid());??
????????????????????????CurrentSession.setAttribute("user",?userRegister);??
????????????????????????return?"redirect:/user/userCenter";??
????????????????????}else{??
????????????????????????return?"/jsp/wechat/wechatregister";???
????????????????????}??
????????????????}else{??
????????????????????//如果access_token失效，則再次進行調(diào)用，并存儲access_token值，access_token有效期為2個小時
????????????????????this.wechatOauth(request,?response,?model);???
????????????????}??
????????????}??
????????}?catch?(Exception?e)?{??
????????????System.out.println("===拉取用戶出錯===");??
????????????e.printStackTrace();??
????????}??
????????//forward?redirect
????????return?"/jsp/wechat/wechatregister";???
????}

第四步：拉取用戶，和自己網(wǎng)站用戶綁定

Java代碼 ?

/**
?????*?微信關(guān)聯(lián)用戶
?????*?@Title:?saveWechatUser
?????*?@param?@param?mobilePhone
?????*?@param?@param?password
?????*?@param?@param?validataCode
?????*?@param?@return
?????*?@return?String
?????*?@throws?xinz
?????*/
????@RequestMapping("saveWechatUser")??
????public?String?saveWechatUser(HttpServletResponse?response,String?mobilePhone,String?password,String?validataCode){??
????????//使用手機號來判斷該手機是否在注冊
????????UserRegister?userRegister?=?userService.findUserByPhone(mobilePhone);??
????????WechatUser?wechatUser?=?(WechatUser)CurrentSession.getAttribute("wechatUser");??
????????WechatUser?wechatU?=?new?WechatUser();??
????????wechatU.setOpenid(wechatUser.getOpenid());??
????????List<WechatUser>?findWechatUser?=?wechatUserService.findWechatUser(wechatU);??
????????if(findWechatUser.size()>0?&&?userRegister.getOpenid()!=null){??
????????????CurrentSession.setAttribute("user",?userRegister);??
????????????return?"redirect:/user/userCenter";??
????????}else{??
????????????//如果沒有注冊，開始注冊
????????????if(userRegister==null){??
????????????????Result<UserRegister>?saveUserInfoApp?=?userRegisterService.saveUserInfoApp(mobilePhone,?password,?validataCode,wechatUser);??
????????????????if(saveUserInfoApp.getState()==1){??
????????????????????//進行微信和用戶的關(guān)聯(lián)
????????????????????wechatUserService.saveWechatUser(wechatUser);??
????????????????????CurrentSession.setAttribute("user",?userRegister);??
????????????????????return?"redirect:/user/userCenter";??
????????????????}??
????????????}else?if(userRegister.getOpenid()==null?||?userRegister.getOpenid().equals("")){??
????????????//否則，查詢出用戶信息，放入session中，關(guān)聯(lián)微信，跳轉(zhuǎn)到用戶中心????
????????????????UserRegister?userReg?=?new?UserRegister();??
????????????????userReg.setId(userRegister.getId());??
????????????????//存入微信openid
????????????????userReg.setOpenid(wechatUser.getOpenid());??
????????????????userService.upUser(userReg);??
????????????????UserInfo?user?=?new?UserInfo();??
????????????????//存入微信頭像
????????????????//圖片類型
????????????????String?dateStr?=DateUtil.format(DateUtil.getCurrentDate(),?"yyyyMMdd")??+?"/";??
????????????????//圖片類型
????????????????String?imgType?=?"JPG";??
????????????????//微信頭像名稱
????????????????String?app2DBarNameAndType?=?UuidUtil.getUUID()+"."+imgType;??
????????????????//微信頭像路徑
????????????????String?path?=???ZhtxHelper.getApplicationResourcesProp("application","app.img.projectpath")+?SysConstant.GOODS2DBARPATH?+?dateStr;??
????????????????File?file1?=?new?File(path);??
????????????????file1.mkdirs();??
????????????????//圖片全路徑
????????????????String?imgUrl?=?SysConstant.GOODS2DBARPATH?+?dateStr+app2DBarNameAndType;??
????????????????FileUtil.fileUpload(wechatUser.getHeadimgurl(),?path);??
????????????????user.setRegisterId(userRegister.getId());??
????????????????user.setImageUrl(imgUrl);??
????????????????userInfoService.updateUserInfo(user);??
????????????????//存入微信用戶
????????????????wechatUserService.saveWechatUser(wechatUser);??
????????????????UserRegister?userW?=?userService.findUserByPhone(mobilePhone);??
????????????????CurrentSession.setAttribute("user",?userW);??
????????????????return?"redirect:/user/userCenter";??
????????????}else{??
????????????????CurrentSession.setAttribute("user",?userRegister);??
????????????????return?"redirect:/user/userCenter";??
????????????}??
????????}??
????????return?"redirect:/user/userCenter";??
????}

附：檢驗授權(quán)憑證（access_token）是否有效

Java代碼 ?

/**
?????*?檢驗授權(quán)憑證（access_token）是否有效
?????*?@Title:?checkAccessToken
?????*?@param?@param?access_token?網(wǎng)頁授權(quán)接口調(diào)用憑證,注意：此access_token與基礎(chǔ)支持的access_token不同?
?????*?@param?@param?openid?用戶的唯一標識?
?????*?@return?WechatMsg???返回消息實體
?????*?@throws?xinz
?????*/
????public?static?WechatMsg?checkAccessToken(String?access_token,String?openid){??
?????????String?requestMethod?=?"GET";??
?????????String?outputStr?=?"";???
?????????String?url?=?"https://api.weixin.qq.com/sns/auth?"
????????????????+?"access_token="+access_token+""
????????????????+?"&openid="+openid+"";??
?????????String?httpmsg?=?WeixinUtil.httpRequest(url,?requestMethod,?outputStr);??
?????????System.out.println("拉取用戶信息返回消息=="+httpmsg);??
?????????WechatMsg?msg?=?JSON.parseObject(httpmsg,?WechatMsg.class);??
?????????return?msg;??
????}

?然后在網(wǎng)頁端，則是需要編寫H5頁面，進行自己網(wǎng)站和微信用戶的關(guān)聯(lián)，我這里是使用手機號，用戶輸入手機號，進行判斷，如果注冊過就直接關(guān)聯(lián)，如果用戶沒有注冊則進行注冊后關(guān)聯(lián)，完成后跳轉(zhuǎn)到會員中心。

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