{"total":23000,"count":10000,"data":{"openid":["OPENID1","OPENID2",...,"OPENID10000"]},"next_openid":"OPENID10000"
}https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID1返回结果:
{"total":23000,"count":10000,"data":{"openid":["OPENID10001","OPENID10002",...,"OPENID20000"]},"next_openid":"OPENID20000"
}https://api.weixin.qq.com/cgi-bin/user/get?access_token=ACCESS_TOKEN&next_openid=NEXT_OPENID2返回结果（关注者列表已返回完时，返回next_openid为空）:
{"total":23000,"count":3000,"data":{""openid":["OPENID20001","OPENID20002",...,"OPENID23000"]},"next_openid":"OPENID23000"
}

/*** 类描述：微信公众平台用户openId列表信息* 开发人员：wangqiulin* 开发时间：2017-9-5*/
public class WeixinUserList {private Integer total;//关注该公众账号的总用户数private Integer count;//拉取的OPENID个数，最大值为10000private WxOpenidInfo data;//列表数据，OPENID的列表private String next_openid;//拉取列表的最后一个用户的OPENIDprivate int errcode;//错误编码private String errmsg="ok";//错误提示public Integer getTotal() {return total;}public void setTotal(Integer total) {this.total = total;}public Integer getCount() {return count;}public void setCount(Integer count) {this.count = count;}public String getNext_openid() {return next_openid;}public void setNext_openid(String next_openid) {this.next_openid = next_openid;}public WxOpenidInfo getData() {return data;}public void setData(WxOpenidInfo data) {this.data = data;}public int getErrcode() {return errcode;}public void setErrcode(int errcode) {this.errcode = errcode;}public String getErrmsg() {return errmsg;}public void setErrmsg(String errmsg) {this.errmsg = errmsg;}}openidList集合对象
import java.util.List;public class WxOpenidInfo {private List<string> openid;public List<string> getOpenid() {return openid;}public void setOpenid(List<string> openid) {this.openid = openid;}
}

public WeixinUserList getUserOpenIdList(String nextOpenid, String accessToken) {//用户openid列表信息WeixinUserList openIdListInfo = null;synchronized(this){try {//循环获取用户openid列表do{//微信公众号获取用户列表信息接口地址String requestUrl = null;if(StringUtils.isBlank(nextOpenid)){requestUrl = new StringBuffer().append("https://api.weixin.qq.com/cgi-bin/user/get?access_token=").append(accessToken).toString();}else {requestUrl = new StringBuffer().append("https://api.weixin.qq.com/cgi-bin/user/get?access_token=").append(accessToken).append("&next_openid=").append(nextOpenid).toString();}openIdListInfo = restTemplate.getForObject(requestUrl, WeixinUserList.class);if(openIdListInfo != null && openIdListInfo.getErrcode() == 0){//获取用户openid列表对象WxOpenidInfo wxOpenidInfo = openIdListInfo.getData();if(wxOpenidInfo != null){List<string> openids = wxOpenidInfo.getOpenid();if(openids != null && openids.size() > 0){//生成数据的表头StringBuffer text = new StringBuffer();for (String openid : openids) {//生成数据的内容text.append(openid+"\r\n");}//写入txt文件中
                                writeTxtFile(text.toString());}//拉取列表的最后一个用户的OPENIDnextOpenid = openIdListInfo.getNext_openid();}}else {openIdListInfo.setErrcode(40000);openIdListInfo.setErrmsg("获取关注用户列表失败");return openIdListInfo ;}}while (openIdListInfo.getCount() == 10000);} catch (Exception e) {LOG.error("获取用户列表失败",e);openIdListInfo .setErrcode(40000);openIdListInfo .setErrmsg("获取用户列表失败");return openIdListInfo ;}}return openIdListInfo;}

   /*** 写文件*/public void writeTxtFile(String content) throws IOException{//指定文件路径和名称String path = "D:/openidList.txt";File filename = new File(path);if (!filename.exists()) {filename.createNewFile();LOG.info(filename + "已创建！");}//先读取原有文件内容，然后进行写入操作RandomAccessFile randomAccessFile = null;try {randomAccessFile = new RandomAccessFile(filename, "rw");// 文件长度，字节数     long fileLength = randomAccessFile.length();     // 将写文件指针移到文件尾。
         randomAccessFile.seek(fileLength);     randomAccessFile.writeBytes(content);} catch (IOException e1) {