準備工作

全局配置的跳轉路徑

# 微信開放平臺 重定向url wx.open.redirect_url=http://回調地址/api/ucenter/wx/callback

修改當前項目啟動端口號為8150

測試回調是否可用

在WxApiController中添加方法

@GetMapping("callback") public String callback(String code, String state, HttpSession session) {//得到授權臨時票據codeSystem.out.println("code = " + code);System.out.println("state = " + state); }

后臺開發

添加依賴

<!--httpclient--> <dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId> </dependency> <!--commons-io--> <dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId> </dependency> <!--gson--> <dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId> </dependency>

創建httpclient工具類

放入util包

package com.leon.wxloginservice.utils;import org.apache.commons.io.IOUtils; import org.apache.commons.lang.StringUtils; import org.apache.http.Consts; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.config.RequestConfig.Builder; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.conn.ConnectTimeoutException; import org.apache.http.conn.ssl.SSLConnectionSocketFactory; import org.apache.http.conn.ssl.SSLContextBuilder; import org.apache.http.conn.ssl.TrustStrategy; import org.apache.http.conn.ssl.X509HostnameVerifier; import org.apache.http.entity.ContentType; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.impl.conn.PoolingHttpClientConnectionManager; import org.apache.http.message.BasicNameValuePair;import javax.net.ssl.SSLContext; import javax.net.ssl.SSLException; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocket; import java.io.IOException; import java.net.SocketTimeoutException; import java.security.GeneralSecurityException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.Set;/*** 依賴的jar包有：commons-lang-2.6.jar、httpclient-4.3.2.jar、httpcore-4.3.1.jar、commons-io-2.4.jar* @author zhaoyb**/ public class HttpClientUtils {public static final int connTimeout=10000;public static final int readTimeout=10000;public static final String charset="UTF-8";private static HttpClient client = null;static {PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager();cm.setMaxTotal(128);cm.setDefaultMaxPerRoute(128);client = HttpClients.custom().setConnectionManager(cm).build();}public static String postParameters(String url, String parameterStr) throws ConnectTimeoutException, SocketTimeoutException, Exception{return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);}public static String postParameters(String url, String parameterStr,String charset, Integer connTimeout, Integer readTimeout) throws ConnectTimeoutException, SocketTimeoutException, Exception{return post(url,parameterStr,"application/x-www-form-urlencoded",charset,connTimeout,readTimeout);}public static String postParameters(String url, Map<String, String> params) throws ConnectTimeoutException,SocketTimeoutException, Exception {return postForm(url, params, null, connTimeout, readTimeout);}public static String postParameters(String url, Map<String, String> params, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,SocketTimeoutException, Exception {return postForm(url, params, null, connTimeout, readTimeout);}public static String get(String url) throws Exception {return get(url, charset, null, null);}public static String get(String url, String charset) throws Exception {return get(url, charset, connTimeout, readTimeout);}/*** 發送一個 Post 請求, 使用指定的字符集編碼.** @param url* @param body RequestBody* @param mimeType 例如 application/xml "application/x-www-form-urlencoded" a=1&b=2&c=3* @param charset 編碼* @param connTimeout 建立鏈接超時時間,毫秒.* @param readTimeout 響應超時時間,毫秒.* @return ResponseBody, 使用指定的字符集編碼.* @throws ConnectTimeoutException 建立鏈接超時異常* @throws SocketTimeoutException 響應超時* @throws Exception*/public static String post(String url, String body, String mimeType,String charset, Integer connTimeout, Integer readTimeout)throws ConnectTimeoutException, SocketTimeoutException, Exception {HttpClient client = null;HttpPost post = new HttpPost(url);String result = "";try {if (StringUtils.isNotBlank(body)) {HttpEntity entity = new StringEntity(body, ContentType.create(mimeType, charset));post.setEntity(entity);}// 設置參數Builder customReqConf = RequestConfig.custom();if (connTimeout != null) {customReqConf.setConnectTimeout(connTimeout);}if (readTimeout != null) {customReqConf.setSocketTimeout(readTimeout);}post.setConfig(customReqConf.build());HttpResponse res;if (url.startsWith("https")) {// 執行 Https 請求.client = createSSLInsecureClient();res = client.execute(post);} else {// 執行 Http 請求.client = HttpClientUtils.client;res = client.execute(post);}result = IOUtils.toString(res.getEntity().getContent(), charset);} finally {post.releaseConnection();if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {((CloseableHttpClient) client).close();}}return result;}/*** 提交form表單** @param url* @param params* @param connTimeout* @param readTimeout* @return* @throws ConnectTimeoutException* @throws SocketTimeoutException* @throws Exception*/public static String postForm(String url, Map<String, String> params, Map<String, String> headers, Integer connTimeout,Integer readTimeout) throws ConnectTimeoutException,SocketTimeoutException, Exception {HttpClient client = null;HttpPost post = new HttpPost(url);try {if (params != null && !params.isEmpty()) {List<NameValuePair> formParams = new ArrayList<NameValuePair>();Set<Entry<String, String>> entrySet = params.entrySet();for (Entry<String, String> entry : entrySet) {formParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));}UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formParams, Consts.UTF_8);post.setEntity(entity);}if (headers != null && !headers.isEmpty()) {for (Entry<String, String> entry : headers.entrySet()) {post.addHeader(entry.getKey(), entry.getValue());}}// 設置參數Builder customReqConf = RequestConfig.custom();if (connTimeout != null) {customReqConf.setConnectTimeout(connTimeout);}if (readTimeout != null) {customReqConf.setSocketTimeout(readTimeout);}post.setConfig(customReqConf.build());HttpResponse res = null;if (url.startsWith("https")) {// 執行 Https 請求.client = createSSLInsecureClient();res = client.execute(post);} else {// 執行 Http 請求.client = HttpClientUtils.client;res = client.execute(post);}return IOUtils.toString(res.getEntity().getContent(), "UTF-8");} finally {post.releaseConnection();if (url.startsWith("https") && client != null&& client instanceof CloseableHttpClient) {((CloseableHttpClient) client).close();}}}/*** 發送一個 GET 請求** @param url* @param charset* @param connTimeout 建立鏈接超時時間,毫秒.* @param readTimeout 響應超時時間,毫秒.* @return* @throws ConnectTimeoutException 建立鏈接超時* @throws SocketTimeoutException 響應超時* @throws Exception*/public static String get(String url, String charset, Integer connTimeout,Integer readTimeout)throws ConnectTimeoutException,SocketTimeoutException, Exception {HttpClient client = null;HttpGet get = new HttpGet(url);String result = "";try {// 設置參數Builder customReqConf = RequestConfig.custom();if (connTimeout != null) {customReqConf.setConnectTimeout(connTimeout);}if (readTimeout != null) {customReqConf.setSocketTimeout(readTimeout);}get.setConfig(customReqConf.build());HttpResponse res = null;if (url.startsWith("https")) {// 執行 Https 請求.client = createSSLInsecureClient();res = client.execute(get);} else {// 執行 Http 請求.client = HttpClientUtils.client;res = client.execute(get);}result = IOUtils.toString(res.getEntity().getContent(), charset);} finally {get.releaseConnection();if (url.startsWith("https") && client != null && client instanceof CloseableHttpClient) {((CloseableHttpClient) client).close();}}return result;}/*** 從 response 里獲取 charset** @param ressponse* @return*/@SuppressWarnings("unused")private static String getCharsetFromResponse(HttpResponse ressponse) {// Content-Type:text/html; charset=GBKif (ressponse.getEntity() != null && ressponse.getEntity().getContentType() != null && ressponse.getEntity().getContentType().getValue() != null) {String contentType = ressponse.getEntity().getContentType().getValue();if (contentType.contains("charset=")) {return contentType.substring(contentType.indexOf("charset=") + 8);}}return null;}/*** 創建 SSL連接* @return* @throws GeneralSecurityException*/private static CloseableHttpClient createSSLInsecureClient() throws GeneralSecurityException {try {SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {public boolean isTrusted(X509Certificate[] chain,String authType) throws CertificateException {return true;}}).build();SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {@Overridepublic boolean verify(String arg0, SSLSession arg1) {return true;}@Overridepublic void verify(String host, SSLSocket ssl)throws IOException {}@Overridepublic void verify(String host, X509Certificate cert)throws SSLException {}@Overridepublic void verify(String host, String[] cns,String[] subjectAlts) throws SSLException {}});return HttpClients.custom().setSSLSocketFactory(sslsf).build();} catch (GeneralSecurityException e) {throw e;}}public static void main(String[] args) {try {String str= post("https://localhost:443/ssl/test.shtml","name=12&page=34","application/x-www-form-urlencoded", "UTF-8", 10000, 10000);//String str= get("https://localhost:443/ssl/test.shtml?name=12&page=34","GBK");/*Map<String,String> map = new HashMap<String,String>();map.put("name", "111");map.put("page", "222");String str= postForm("https://localhost:443/ssl/test.shtml",map,null, 10000, 10000);*/System.out.println(str);} catch (ConnectTimeoutException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SocketTimeoutException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

創建回調controller方法

在WxApiController.java中添加如下方法

/** * @param code * @param state * @return */ @GetMapping("callback") public String callback(String code, String state){//得到授權臨時票據codeSystem.out.println(code);System.out.println(state);//從redis中將state獲取出來，和當前傳入的state作比較//如果一致則放行，如果不一致則拋出異常：非法訪問//向認證服務器發送請求換取access_tokenString baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +"?appid=%s" +"&secret=%s" +"&code=%s" +"&grant_type=authorization_code";String accessTokenUrl = String.format(baseAccessTokenUrl,ConstantPropertiesUtil.WX_OPEN_APP_ID,ConstantPropertiesUtil.WX_OPEN_APP_SECRET,code);String result = null;try {result = HttpClientUtils.get(accessTokenUrl);System.out.println("accessToken=============" + result);} catch (Exception e) {throw new Exception(20001, "獲取access_token失敗");}//解析json字符串Gson gson = new Gson();HashMap map = gson.fromJson(result, HashMap.class);String accessToken = (String)map.get("access_token");String openid = (String)map.get("openid");//查詢數據庫當前用用戶是否曾經使用過微信登錄Member member = memberService.getByOpenid(openid);if(member == null){System.out.println("新用戶注冊");//訪問微信的資源服務器，獲取用戶信息String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +"?access_token=%s" +"&openid=%s";String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);String resultUserInfo = null;try {resultUserInfo = HttpClientUtils.get(userInfoUrl);System.out.println("resultUserInfo==========" + resultUserInfo);} catch (Exception e) {throw new Exception(20001, "獲取用戶信息失敗");}//解析jsonHashMap<String, Object> mapUserInfo = gson.fromJson(resultUserInfo, HashMap.class);String nickname = (String)mapUserInfo.get("nickname");String headimgurl = (String)mapUserInfo.get("headimgurl");//向數據庫中插入一條記錄member = new Member();member.setNickname(nickname);member.setOpenid(openid);member.setAvatar(headimgurl);memberService.save(member);}//TODO 登錄return "redirect:http://localhost:3000"; }

業務層

業務接口：MemberService.java

Member getByOpenid(String openid);

業務實現：MemberServiceImpl.java

@Override public Member getByOpenid(String openid) {QueryWrapper<Member> queryWrapper = new QueryWrapper<>();queryWrapper.eq("openid", openid);Member member = baseMapper.selectOne(queryWrapper);return member; }

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總結

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