由于公众号换了公司主体，需要做迁移，玩家的openId数据需要做处理。
(我是按我要的json格式，将粉丝导成了1万条数据的一个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;/*** 导出公众号粉丝* @author wangfj*/ public class ExportFansFromPublic { @SuppressWarnings({ "unchecked", "static-access","rawtypes"})public static void main(String[] args) throws Exception { String token = AccessTokenKit.getTokenNew("appId", "app秘钥");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++){ //我这了定的50，是根据公众号粉丝数量来的，一个文件一万条，你们自己算if(!"".equals(nextOpenId)){params.put("next_openid", nextOpenId);}//根据appId,appSecret获取数据粉丝openId(1次1万条)//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("导出完毕");break;} }}public static String writerJson(List<String> list,int fileName){String nextOpenId = "";FileWriter fw = null; PrintWriter out = null; try { // 指定生成txt的文件路径 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(); // 由于此处用到了缓冲流，如果数据量过大，不进行flush操作，某些数据将依旧 存在于内从中而不会写入文件，此问题一定要注意 } catch (Exception e) { e.printStackTrace(); } } return nextOpenId;} }
