Java 微信公眾號導出所有粉絲(openId)

由於公眾號換了公司主體，需要做遷移，玩家的openId數據需要做處理。

(我是按我要的json格式，將粉絲導成了1萬條數據的一個json文件)

 文件格式：

{
    "info":[
        {"openId":"ogVous494ltuNmO4zHb1seHeGLSk"}
    ]
}

 

package exportFansFromPublic;

import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.odao.weixin.api.support.AccessTokenKit;
import com.odao.weixin.api.support.HttpKit;

/**
 * 導出公眾號粉絲
 * @author wangfj
 */
public class ExportFansFromPublic {  
    @SuppressWarnings({ "unchecked", "static-access","rawtypes"})
    public static void main(String[] args) throws Exception {  
        String token = AccessTokenKit.getTokenNew("appId", "app秘鑰");
        String accesstoken = (String) ((Map) JSON.parseObject(token, Map.class)).get("access_token");
        Map<String,String> params = new HashMap<String,String>();
        params.put("access_token", accesstoken);
        String nextOpenId = "";
        for(int i=1;i<=50;i++){ //我這了定的50，是根據公眾號粉絲數量來的，一個文件一萬條，你們自己算
            if(!"".equals(nextOpenId)){
                params.put("next_openid", nextOpenId);
            }
            //根據appId,appSecret獲取數據粉絲openId(1次1萬條)
            //格式：{"data"：{"openid":["oneOpenId,twoOpenId"]},"next_openid":"theNextOpenId"}
            try{
                String data = HttpKit.get("https://api.weixin.qq.com/cgi-bin/user/get",params);
                JSONObject json = (JSONObject) JSONObject.parse(data);
                String openId = json.get("data").toString();
                
                JSONObject open = (JSONObject) JSONObject.parse(openId);
                String openIds = open.get("openid").toString();
                JSONArray arr= JSONObject.parseArray(openIds);
                
                List<String> list = arr.toJavaObject(arr,  List.class);
                
                nextOpenId = writerJson(list,i);
            }catch(Exception e){
                System.out.println("導出完畢");
                break;
            }    
        }
    }
    
    public static String writerJson(List<String> list,int fileName){
        String nextOpenId = "";
        FileWriter fw = null;  
        PrintWriter out = null;  
        try {  
            // 指定生成txt的文件路徑  
            fw = new FileWriter("C:/Users/admin/Desktop/fan/"+fileName+".json");  
            out = new PrintWriter(fw);  
            out.println("{");
            out.println("\t\"info\":[");
            for(int i=0;i<list.size();i++){
                if(i!=list.size()-1){
                    out.println("\t\t{\"openId\":\""+list.get(i)+"\"},");
                }else{
                    nextOpenId = list.get(i);
                    out.println("\t\t{\"openId\":\""+list.get(i)+"\"}");
                }
            }
            out.println("\t]");
            out.println("}");
        } catch (Exception e) {  
            e.printStackTrace();
        } finally {  
            try {  
                out.close();  
                fw.close();  
                out.flush();  // 由於此處用到了緩沖流，如果數據量過大，不進行flush操作，某些數據將依舊  存在於內從中而不會寫入文件，此問題一定要注意  
            } catch (Exception e) {  
                e.printStackTrace();  
            }  
        }  
        return nextOpenId;
    }
}