微信小程序开发，我们总要去获取一些微信的信息，以下是我开发中的一些总结。
1、获取openid和用户当前手机号及以前注册的手机号
@RequestMapping(value = "/decodeUserInfoNew", method = RequestMethod.GET)
private Map<String, Object> decodeUserInfoNew(String code,String encryptedData,String iv) {
Map<String, Object> map = new HashMap<String, Object>();
// login code can not be null
if (code == null || code.length() == 0) {
map.put("status", 0);
map.put("msg", "code 不能为空");
return map;
}
// mini-Program's AppID
String wechatAppId = "填写你小程序的AppID";
// mini-Program's session-key
String wechatSecretKey = "填写你小程序的session-key";
String grantType = "authorization_code";
// using login code to get sessionId and openId
String params = "appid=" + wechatAppId + "&secret=" + wechatSecretKey + "&js_code=" + code + "&grant_type="
+ grantType;
// sending request
String sr = HttpRequest.sendGet("https://api.weixin.qq.com/sns/jscode2session", params);//此处需要注意你的小程序是否为同一个主体
// analysis request content
JSONObject json = JSONObject.fromObject(sr);
// getting session_key
String sessionKey = json.get("session_key").toString();
// getting open_id
String openId = json.get("openid").toString();
//decoding encrypted info with AES
try {
String result = AesCbuUtil.decrypt(encryptedData, sessionKey, 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<String, Object> userInfo = new HashMap<String, Object>();
userInfo.put("openId", openId);
userInfo.put("phoneNumber", userInfoJSON.get("phoneNumber"));
userInfo.put("purePhoneNumber", userInfoJSON.get("purePhoneNumber"));
userInfo.put("countryCode", userInfoJSON.get("countryCode"));
map.put("userInfo", userInfo);
return map;
}
} catch (Exception e) {
e.printStackTrace();
}
map.put("status", 0);
map.put("msg", "解密失败");
Map<String, Object> userInfo = new HashMap<String, Object>();
if (openId==null) {
userInfo.put("msg", "openId为空！");
}else {
userInfo.put("openid", openId);
}
if (sessionKey==null) {
userInfo.put("msg", "sessionKey为空！");
}else {
userInfo.put("sessionKey", sessionKey);
}
map.put("userInfo", userInfo);
map.put("data", json);
return map;
}
2、获取小程序accessToken
@RequestMapping(value = "/getToken", method = RequestMethod.POST)
private Map<String, Object> getToken() {
Map<String, Object> map = new HashMap<String, Object>();
// mini-Program's AppID
String wechatAppId = "填写你小程序的AppID";
// mini-Program's session-key
String wechatSecretKey = "填写你小程序的session-key";
String grantType = "client_credential";
// using login code to get sessionId and openId
String params = "appid=" + wechatAppId + "&secret=" + wechatSecretKey + "&grant_type="
+ grantType;
// sending request
String sr = HttpRequest.sendGet("https://api.weixin.qq.com/cgi-bin/token", params);
// analysis request content
JSONObject json = JSONObject.fromObject(sr);
//先将解密的json字符串返给前端，看下里面有哪些字段，之后可以自行取出来返给前端，方便拿取数据
map.put("data", json);
return map;
}
下面是用到的工具类：
1、HttpRequest工具类
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) {
// 发送 GET 请求
String s = HttpRequest.sendGet("http://v.qq.com/x/cover/kvehb7okfxqstmc.html?vid=e01957zem6o", "");
System.out.println(s);
// 发送 POST 请求
// 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发送GET方法的请求
*
* @param url 发送请求的URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！" + e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
}
2、AesCbuUtil加解密工具
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 AesCbuUtil {
static {
//BouncyCastle是一个开源的加解密解决方案
Security.addProvider(new BouncyCastleProvider());
}
/**
* AES解密
*
* @param data //密文，被加密的数据
* @param key //秘钥
* @param iv //偏移量
* @param encodingFormat //解密后的结果需要进行的编码
* @return
* @throws Exception
*/
public static String decrypt(String data, String key, String iv, String encodingFormat) throws Exception {
// initialize();
//被加密的数据
byte[] dataByte = Base64.decodeBase64(data.getBytes());
//加密秘钥
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;
}
}