小程序换取openId
1 package com.shanxilgong.linxi.controllers; 2 3 import com.alibaba.fastjson.JSON; 4 import com.alibaba.fastjson.JSONObject; 5 import com.shanxilgong.linxi.listener.MyTimerTask; 6 import org.apache.catalina.servlet4preview.http.HttpServletRequest; 7 import org.apache.http.HttpEntity; 8 import org.apache.http.HttpResponse; 9 import org.apache.http.client.HttpClient; 10 import org.apache.http.client.methods.HttpGet; 11 import org.apache.http.impl.client.DefaultHttpClient; 12 import org.apache.http.util.EntityUtils; 13 import org.slf4j.Logger; 14 import org.slf4j.LoggerFactory; 15 import org.springframework.beans.factory.annotation.Value; 16 import org.springframework.web.bind.annotation.RequestMapping; 17 import org.springframework.web.bind.annotation.RequestMethod; 18 import org.springframework.web.bind.annotation.RequestParam; 19 import org.springframework.web.bind.annotation.RestController; 20 21 import javax.servlet.http.HttpServletResponse; 22 import javax.servlet.http.HttpSession; 23 import java.io.IOException; 24 import java.util.Map; 25 26 import static com.shanxilgong.linxi.tokenManager.TokenManager.tokenManager; 27 28 /** 29 * 该接口用于换取openId,进行用户状态维护 30 * 1、在进行参数绑定时,默认是必填参数。 31 * 2、微信小程序侧在传递参数时,使用Get方法, 32 * 将wx.login()获取到的临时凭证拼接值url后面 33 * 34 * 小程序当前实现逻辑: 35 * 小程序页签每次进入到“我的”页签都会自动登录。 36 * 37 * 返回值: {"session_key":"JHdZspvydvulDWF8BnfUew==","expires_in":7200,"openid":"oGo8D0RMEW4KK55RMOpQR2XaJQA8"} 38 * 过期时间,单位为秒,1小时=1*60*60 过期时间是2小时 39 */ 40 @RestController 41 @RequestMapping(value = {"/login"},method = RequestMethod.GET) 42 public class LoginGetInfo 43 { 44 // Spring boot 里面本身已经集成了 log4j 的jar相关 45 private static Logger logger = LoggerFactory.getLogger(LoginGetInfo.class); 46 47 @Value("${appid}") 48 private String appid; 49 50 @Value("${secret}") 51 private String secret; 52 53 private static final String URL = 54 "https://api.weixin.qq.com/sns/jscode2session?" + 55 "appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code"; 56 57 @RequestMapping(value = {"/getInfo"}) 58 public JSONObject getInfo(@RequestParam(value = "data") String js_code, 59 HttpServletRequest request, HttpServletResponse response) 60 { 61 62 JSONObject result = new JSONObject(); 63 HttpClient httpClient=new DefaultHttpClient(); 64 HttpGet httpGet = new HttpGet( 65 URL.replace("APPID",appid) 66 .replace("SECRET",secret) 67 .replace("JSCODE",js_code)); 68 try 69 { 70 HttpResponse resp = httpClient.execute(httpGet); 71 if(200 != resp.getStatusLine().getStatusCode()) 72 { 73 logger.error("execute request of get is error."); 74 result.put("code","-1"); 75 result.put("msg","error"); 76 return result; 77 } 78 HttpEntity entity=resp.getEntity(); 79 String msg= EntityUtils.toString(entity,"utf-8"); 80 JSONObject json = JSON.parseObject(msg); 81 String openId = json.getString("openid"); // 拿到当前用户在微信服务器的唯一凭证 82 83 // 在token缓存中去查看当前用户的凭证是否已经存在 84 if (!tokenManager.containsKey(openId)) 85 { 86 // 添加用户凭证 87 tokenManager.put(openId,true); 88 } 89 } 90 catch (IOException e) 91 { 92 logger.error("execute request of get is error."); 93 result.put("code","-1"); 94 result.put("msg","error"); 95 return result; 96 } 97 result.put("code","0"); 98 result.put("msg","success"); 99 return result; 100 } 101 }