寫了好一陣子終於把微信小程序的登陸功能實現了，之前就因爲返回openid耽誤了好一段時間，所以今天就跟大家分享一下java後臺的返回openid及解密用戶信息。
微信小程序前端：
js頁面：
wx.login({
success: function (res) {
var code = res.code;//登錄憑證
if (code) {
//2、調用獲取用戶信息接口
wx.getUserInfo({
success: function (res) {
console.log({ encryptedData: res.encryptedData, iv: res.iv, code: code })
//3.請求自己的服務器，解密用戶信息 獲取unionId等加密信息
wx.request({
url: 'http://域名/**.action',//自己的服務接口地址
method: 'get',
header: {
"Content-Type": "applciation/json"
},
data: { encryptedData: res.encryptedData, iv: res.iv, code: code },
success: function (data) {
//4.解密成功後 獲取自己服務器返回的結果
if (data.data.status == 1) {
var userInfo_ = data.data.userInfo;
console.log(userInfo_)
} else {
console.log('解密失敗')
}
},
fail: function () {
console.log('系統錯誤')
}
})
},
fail: function () {
console.log('獲取用戶信息失敗')
}
})
} else {
console.log('獲取用戶登錄態失敗！' + r.errMsg)
}
},
fail: function () {
console.log('登陸失敗')
}
})
java後臺：我是用ssm搭的框架
spring+springMVC+mybatis+sqlserver
先上controller的代碼：
@ResponseBody @RequestMapping(value = "/decodeUserInfo", method = RequestMethod.GET) public Map decodeUserInfo(String encryptedData, String iv, String code) { Map map = new HashMap(); //登錄憑證不能爲空 if (code == null || code.length() == 0) { map.put("status", 0); map.put("msg", "code 不能爲空"); return map; } //小程序唯一標識 (在微信小程序管理後臺獲取) String wxspAppid = "***********************; //小程序的 app secret (在微信小程序管理後臺獲取) String wxspSecret = "************************"; //授權（必填） String grant_type = "***************************"; //////////////// 1、向微信服務器 使用登錄憑證 code 獲取 session_key 和 openid //////////////// //請求參數 String params = "appid=" + wxspAppid + "&secret=" + wxspSecret + "&js_code=" + code + "&grant_type=" + grant_type; //發送請求 String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params); //解析相應內容（轉換成json對象） JSONObject json = JSONObject.fromObject(sr); //獲取會話密鑰（session_key） String session_key = json.get("session_key").toString(); //用戶的唯一標識（openid） String openid = (String) json.get("openid"); //////////////// 2、對encryptedData加密數據進行AES解密 //////////////// try { String result = AesCbcUtil.decrypt(encryptedData, session_key, iv, "UTF-8"); if (null != result && result.length() > 0) { map.put("status", 1); map.put("msg", "解密成功"); JSONObject userInfoJSON = JSONObject.fromObject(result); Map userInfo = new HashMap(); userInfo.put("openId", userInfoJSON.get("openId")); userInfo.put("nickName", userInfoJSON.get("nickName")); userInfo.put("gender", userInfoJSON.get("gender")); userInfo.put("city", userInfoJSON.get("city")); userInfo.put("province", userInfoJSON.get("province")); userInfo.put("country", userInfoJSON.get("country")); userInfo.put("avatarUrl", userInfoJSON.get("avatarUrl")); userInfo.put("unionId", userInfoJSON.get("unionId")); map.put("userInfo", userInfo); return map; } } catch (Exception e) { e.printStackTrace(); } map.put("status", 0); map.put("msg", "解密失敗"); return map; }
解密工具包AesCbcUtil.class
package com.zking.util; import org.apache.commons.codec.binary.Base64; import org.bouncycastle.jce.provider.BouncyCastleProvider; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.io.UnsupportedEncodingException; import java.security.*; import java.security.spec.InvalidParameterSpecException; public class AesCbcUtil { static { //BouncyCastle是一個開源的加解密解決方案，主頁在http://www.bouncycastle.org/ Security.addProvider(new BouncyCastleProvider()); } /** * AES解密 * * @param data //密文，被加密的數據 * @param key //祕鑰 * @param iv //偏移量 * @param encodingFormat //解密後的結果需要進行的編碼 * @return * @throws Exception */ public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception { // initialize(); //被加密的數據 byte[] dataByte = Base64.decodeBase64(data.getBytes()); //加密祕鑰 byte[] keyByte = Base64.decodeBase64(key.getBytes()); //偏移量 byte[] ivByte = Base64.decodeBase64(iv.getBytes()); try { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding"); SecretKeySpec spec = new SecretKeySpec(keyByte, "AES"); AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES"); parameters.init(new IvParameterSpec(ivByte)); cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化 byte[] resultByte = cipher.doFinal(dataByte); if (null != resultByte && resultByte.length > 0) { String result = new String(resultByte, encodingFormat); return result; } return null; } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (NoSuchPaddingException e) { e.printStackTrace(); } catch (InvalidParameterSpecException e) { e.printStackTrace(); } catch (InvalidKeyException e) { e.printStackTrace(); } catch (InvalidAlgorithmParameterException e) { e.printStackTrace(); } catch (IllegalBlockSizeException e) { e.printStackTrace(); } catch (BadPaddingException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return null; } }請求包HttpRequest
HttpRequest
package com.zking.util; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; public class HttpRequest { public static void main(String[] args) { //發送 GET 請求 String s=HttpRequest.sendGet("http://v.qq.com/x/cover/kvehb7okfxqstmc.html?vid=e01957zem6o", ""); System.out.println(s); // //發送 POST 請求 // String sr=HttpRequest.sendPost("http://www.toutiao.com/stream/widget/local_weather/data/?city=%E4%B8%8A%E6%B5%B7", ""); // JSONObject json = JSONObject.fromObject(sr); // System.out.println(json.get("data")); } /** * 向指定URL發送GET方法的請求 * * @param url * 發送請求的URL * @param param * 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。 * @return URL 所代表遠程資源的響應結果 */ public static String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 打開和URL之間的連接 URLConnection connection = realUrl.openConnection(); // 設置通用的請求屬性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立實際的連接 connection.connect(); // 獲取所有響應頭字段 Map<String, List<String>> map = connection.getHeaderFields(); // 遍歷所有的響應頭字段 for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); } // 定義 BufferedReader輸入流來讀取URL的響應 in = new BufferedReader(new InputStreamReader( connection.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("發送GET請求出現異常！" + e); e.printStackTrace(); } // 使用finally塊來關閉輸入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定 URL 發送POST方法的請求 * * @param url * 發送請求的 URL * @param param * 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。 * @return 所代表遠程資源的響應結果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打開和URL之間的連接 URLConnection conn = realUrl.openConnection(); // 設置通用的請求屬性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 發送POST請求必須設置如下兩行 conn.setDoOutput(true); conn.setDoInput(true); // 獲取URLConnection對象對應的輸出流 out = new PrintWriter(conn.getOutputStream()); // 發送請求參數 out.print(param); // flush輸出流的緩衝 out.flush(); // 定義BufferedReader輸入流來讀取URL的響應 in = new BufferedReader( new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("發送 POST 請求出現異常！"+e); e.printStackTrace(); } //使用finally塊來關閉輸出流、輸入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } }
pom.xml的配置：要配置：rt.jar跟jce.jar都是在jdk/jre/lib裏的，記得對應好路勁
<bootclasspath>${java.home}/jre/lib/rt.jar${path.separator}${java.home}/jre/lib/jce.jar</bootclasspath>
<build> <finalName>OneProject</finalName> <pluginManagement> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.0.0</version> </plugin> <plugin> <groupId>org.apache.maven.pluginsgroupId</groupId> <artifactId>maven-compiler-pluginartifactId</artifactId> <version>2.5.1version</version> <configuration> <source>1.7source</source> <target>1.7target</target> <compilerArguments> <verbose /> <bootclasspath>${java.home}/jre/lib/rt.jar${path.separator}${java.home}/jre/lib/jce.jar</bootclasspath> </compilerArguments> <encoding>utf-8encoding</encoding> </configuration> </plugin> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.20.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.0</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </build>
這裏可能還會報406錯誤，主要是因爲返回結果類型的問題
所以得在springmvc.xml中配置
<context:annotation-config /> <mvc:annotation-driven />
這樣就可以了，然後我們去小程序控制臺看返回結果
這樣就大功告成了！