java企业微信登录后台代码及个人理解。

话不多说，直接贴代码，微信企业号端发送带参的请求到后台找到下面方法（参数code）。

如下主流程：

-----------------------------------------------------------------------------------------------------

@RequestMapping("/getUserWXInfo")
   public AjaxResponse getUserWXInfo(String code){
       JSONObject obj = null;
       String accessToken = this.getAccess_token();
       String userTicket = this.getUserTicket(accessToken, code);
       String responseContext = null;
       if(null !=userTicket&&!"".equals(userTicket)){
           responseContext = this.getUserInfoByTicket(userTicket, accessToken);
       }
       obj = JSON.parseObject(responseContext);
       return AjaxResponse.success("OK",responseContext);
   }

----------------------------------------------------------------------------------------------------------

主流程解析：

=======================================================================================

主要3部分：

1.getAccess_token() 方法

//获得access_token，根据企业号和企业号密钥交换（access_token一定时间内有效，因此可以在数据库缓存，避免频繁请求）
public String getAccess_token(){
   String turl = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid="+corpid+"&corpsecret="+corpsecret;
   HttpClient client = new DefaultHttpClient();
   HttpGet get = new HttpGet(turl);
   String responseContent = null;
   JSONObject obj = null;
       try
       {
       HttpResponse res = client.execute(get);
   // 响应内容
       HttpEntity entity = res.getEntity();
       responseContent = EntityUtils.toString(entity, "UTF-8");
       obj = JSON.parseObject(responseContent);
       }
       catch (Exception e)
       {
       e.printStackTrace();
       }
   finally
       {
       // 关闭连接 ,释放资源
       client.getConnectionManager().shutdown();
       return obj.getString("access_token");
   }
}

2.getUserTicket(String token,String code) 方法

//获得userTicket 需要access_token以及前端授权跳转的code
   public String getUserTicket(String token,String code){
       String turl = "https://qyapi.weixin.qq.com/cgi-bin/user/getuserinfo?access_token="+token+"&code="+code;
       System.out.println(turl);
       HttpClient client = new DefaultHttpClient();
       HttpGet get = new HttpGet(turl);
               String responseContent = null;
               JSONObject obj = null;
               try
               {
               HttpResponse res = client.execute(get);
           // 响应内容
               HttpEntity entity = res.getEntity();
               responseContent = EntityUtils.toString(entity, "UTF-8");
               obj = JSON.parseObject(responseContent);
               System.out.println(obj.toJSONString());
               }
               catch (Exception e)
               {
               e.printStackTrace();
               }finally{
                   client.getConnectionManager().shutdown();
               return obj.getString("user_ticket");
               }
   }

3.getUserInfoByTicket(userTicket, accessToken) 当userTicket和accessToken 都拿到后，便可以去调用该方法换取用户信息

//利用usertickt交换用户信息
   public String getUserInfoByTicket(String userTicket,String token){
       String uurl = "https://qyapi.weixin.qq.com/cgi-bin/user/getuserdetail?access_token="+token;
       StringBuffer sb = null;
       try {
   //创建连接
   URL url = new URL(uurl);
   HttpURLConnection connection = (HttpURLConnection) url
   .openConnection();
   connection.setDoOutput(true);
   connection.setDoInput(true);
   connection.setRequestMethod("POST");
   connection.setUseCaches(false);
   connection.setInstanceFollowRedirects(true);
   connection.setRequestProperty("contentType", "application/json");
   connection.setRequestProperty("Charset", "UTF-8");
   connection.connect();

   //POST请求
   DataOutputStream out = new DataOutputStream(
   connection.getOutputStream());
   JSONObject obj = new JSONObject();
   obj.put("user_ticket", userTicket);
   out.writeBytes(obj.toString());
   out.flush();
   out.close();

   //读取响应
   BufferedReader reader = new BufferedReader(new InputStreamReader(
   connection.getInputStream()));
   String lines;
   sb = new StringBuffer("");
   while ((lines = reader.readLine()) != null) {
   lines = new String(lines.getBytes(), "utf-8");
   sb.append(lines);
   }

   reader.close();

   // 断开连接
   connection.disconnect();


   } catch (MalformedURLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   } catch (UnsupportedEncodingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   }

       return new String(sb);
   }

========================================================================================

-------完

java企业微信登录后台代码及个人理解。

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