一.微信公众号迁移流程 openid转换

一.总流程图

二.审核通过后，点击迁移之前，拉取旧公众号的openid数据这里使用weixin4j（也可使用其他工具或者微信原生sdk）

审核通过后管理员收到的通知收到该通知后先别忙着点确认进行迁移首先应该把此时旧公众号的openid全部拉出来存到数据库 用于之后的转换openid

1.该表用来储存拉取的旧openid 用来记录对应的新openid

package cn.betatown.member.model.weixin;import java.io.Serializable;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Table;import cn.betatown.model.BaseStringEntity;/****旧openid记录表  此表用于记录转换前的旧openid  并记录openid转换情况*/
@Entity
@Table(name = "M_WEIXIN_OPENID_HIS")
public class WeixinOpenIdHis extends BaseStringEntity implements Serializable {private static final long serialVersionUID = 5700734079006338566L;/*** 旧openid*/@Column(name = "OLD_OPENID",length = 40,nullable = false)private String oldOpenId;/*** 新openid*/@Column(name = "NEW_OPENID", length = 200)private String newOpenId;/*** 手机号码*/@Column(name = "MOBILE_NUMBER", length = 40)private String mobileNumber;/*** 会员id*/@Column(name = "MEMBER_ID", length = 40)private String memberId;public String getOldOpenId() {return oldOpenId;}public String getNewOpenId() {return newOpenId;}public String getMobileNumber() {return mobileNumber;}public String getMemberId() {return memberId;}public void setOldOpenId(String oldOpenId) {this.oldOpenId = oldOpenId;}public void setNewOpenId(String newOpenId) {this.newOpenId = newOpenId;}public void setMobileNumber(String mobileNumber) {this.mobileNumber = mobileNumber;}public void setMemberId(String memberId) {this.memberId = memberId;}public WeixinOpenIdHis() {super();// TODO Auto-generated constructor stub}public WeixinOpenIdHis(String oldOpenId) {super();this.oldOpenId = oldOpenId;}}

2.拉取旧公众号的所有openid 存入数据库

package cn.betatown.member.action.member;import java.util.ArrayList;
import java.util.List;import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;import com.bstek.dorado.annotation.Expose;
import com.foxinmy.weixin4j.exception.WeixinException;
import com.foxinmy.weixin4j.mp.WeixinProxy;
import com.foxinmy.weixin4j.mp.model.Following;import cn.betatown.WchatConfig;
import cn.betatown.common.service.ServiceException;import cn.betatown.common.utils.status.StatusHouse;import cn.betatown.common.utils.web.JsonWriter;
import cn.betatown.member.model.weixin.WeixinOpenIdHis;
import cn.betatown.member.service.member.MemberService;
import cn.betatown.security.model.User;
import cn.betatown.security.service.SecurityService;
import net.sf.json.JSONArray;/*** * @ClassName: MemberAct* @Description: TODO(APP会员视图控制层)* @author xuan.yuan* @date 2019年5月10日 下午12:06:22* */@Controller
public class MemberAct2 {private static Logger logger = LoggerFactory.getLogger(MemberAct2.class);@Autowiredprivate MemberService memberService;@Autowiredprivate SecurityService securityService;/*** 迁移之前拉取所有openid  存入数据库 以便迁移完成后转换openid* @return* @author xuan.yuan* @date 2019年5月10日 下午3:15:49*/@Exposepublic String getAllOpenId(){try {logger.info("executeGetAllopenId(..) start ... ");WchatConfig wchatConfig = WchatConfig.getInstance();//weixin4jWeixinProxy weixinProxy = wchatConfig.getWeixinProxy();//weixin4jList<String> openIds = new ArrayList<String>();String nextOpenId = null;do{Following following = weixinProxy.getFollowingOpenIds(nextOpenId);//weixin4j 获取openidsint count = following.getCount();//拉取的OPENID个数，最大值为10000int total = following.getTotal();//关注总数nextOpenId = following.getNextOpenId();//拉取列表的后一个用户的OPENIDlogger.info("关注总数：【"+total+"】本次拉取：【"+count+"】末尾openid:【"+nextOpenId+"】");openIds = following.getOpenIds();//列表数据，OPENID的列表if(null!=openIds&&openIds.size()>0){for (String openId : openIds) {WeixinOpenIdHis weixinOpenIdHis = new WeixinOpenIdHis(openId);memberService.executeSaveOpenIdHis(weixinOpenIdHis);//将旧openid存入数据库中  用作之后的转换openid源数据logger.info(count+".successOpenid【"+openId+"】");count--;}}}while(null!=openIds&&openIds.size()>0);logger.info("executeGetAllopenId(..) end ... ");return "ok";} catch (WeixinException e) {logger.error(e.getMessage());return e.getErrorDesc();}catch (Exception e){logger.error(e.getMessage());return e.getMessage();}}/*** 迁移完成后转换openid* @return*/@Exposepublic String changeAllOpenId(){//       User user = securityService.getLoginUser();if (user == null) {throw new ServiceException(StatusHouse.COMMON_STATUS_NO_LOGIN_OR_TIMEOUT);}logger.info("executeChangeOpenId(..) start ... ");WchatConfig wchatConfig = WchatConfig.getInstance();WeixinProxy weixinProxy = wchatConfig.getWeixinProxy();try {String token = weixinProxy.getTokenManager().getAccessToken();//新公众号的令牌List<String> oldOpenIds = memberService.pageWeixinOpenIdHis(100, 1);//分批获取之前存储的旧openidint count = 1;while(null!=oldOpenIds&&oldOpenIds.size()>0&&count<450){logger.info("第"+count+"批开始···size="+oldOpenIds.size());String changeUrl = "http://api.weixin.qq.com/cgi-bin/changeopenid?access_token="+token;  //微信提供中的openId转换接口HttpHeaders headers = new HttpHeaders();//请求头  MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");//这里非常重要 必须是json模式 否则调微信接口报错headers.setContentType(type);jsonChangeOpenid jsonChangeOpenid = new jsonChangeOpenid("wx55ee94e1a6154fb2", oldOpenIds);//此处为原帐号的appid需要转换的openIdS 最大100条，这些必须是旧账号目前关注的才行String requestJson = JsonWriter.toJson(jsonChangeOpenid);logger.info("requestJson==>"+requestJson);HttpEntity<String> httpEntity = new HttpEntity<String>(requestJson,headers);RestTemplate restTemplate = new RestTemplate();ResponseEntity<String> response = restTemplate.postForEntity(changeUrl, httpEntity,String.class);logger.info("微信返回："+response.getBody());net.sf.json.JSONObject jsonObject= net.sf.json.JSONObject.fromObject(response.getBody());if(jsonObject.get("errmsg").equals("ok")){JSONArray resultList = jsonObject.getJSONArray("result_list");for (Object object : resultList) {net.sf.json.JSONObject newOpenIdList = net.sf.json.JSONObject.fromObject(object);if(newOpenIdList.get("err_msg").equals("ok")){try {memberService.executeChangeOpenId(newOpenIdList.getString("ori_openid"), newOpenIdList.getString("new_openid"));//根据自己的业务逻辑用新openid 替换 旧openidlogger.error("success旧openID:"+newOpenIdList.get("ori_openid"));} catch (Exception e) {logger.error("旧openID:"+newOpenIdList.get("ori_openid")+"失败原因："+e);continue;}}else{logger.error("旧openID:"+newOpenIdList.get("ori_openid")+"失败原因："+newOpenIdList.get("err_msg"));}}}else{logger.error("errorCode:"+jsonObject.get("errcode")+"errmsg:"+jsonObject.get("errmsg"));return "errorCode:"+jsonObject.get("errcode")+"errmsg:"+jsonObject.get("errmsg");}logger.info("第"+count+"批结束···size="+oldOpenIds.size());//循环执行oldOpenIds = memberService.pageWeixinOpenIdHis(100, 1);count++;};logger.info("executeChangeOpenId(..) end ... ");return "ok";} catch (WeixinException e) {logger.error(e.getMessage());return e.getErrorDesc();}catch (Exception e) {logger.error(e.getMessage());return e.getMessage();}}return "ok";}

二.管理员点击确认迁移

1、审核通过后，系统将会下发迁移确认通知给两个帐号管理员的微信号，双方15天内点击确认迁移则自动开启迁移流程（注：必须在审核成功后的15天内确认迁移通知，超时未确认迁移则迁移失败，如需继续迁移需另外申请并支付审核费用；如审核成功后未收到迁移确认通知，可在公众号后台进入帐号迁移页面申请发送通知，每天只可下发一次）；

2、双方点击确认迁移后，为保证数据不受影响，原帐号会马上冻结，同时系统下发通知给原账号粉丝，告知迁移事宜，粉丝如有异议，可在1天内取消关注，取消关注的用户不会被迁移；

点击确认迁移后粉丝收到的迁移通知

3、1天后(1天粉丝确认)自动触发迁移，包括粉丝、群发素材、违规记录，耗时时间与数据量大小相关，一般将在1-3个天内完成(1-3天粉丝、群发素材、违规记录迁移)，系统给粉丝发送迁移中通知给管理员发送迁移中通知。

点击确认迁移整整1天后管理员会收到这个迁移开始通知此时自动触发迁移

收到上面的通知以后粉丝会陆续收到该通知

4、迁移完成后，新帐号名称同步。微信方面整个迁移流程结束。（迁移完成后没有明确的完成指示，我们公众号粉丝8万左右，一天就完了，只要转换openid接口能调通说明迁移全部完成了）

三.按照自己的需求配置新公众号各白名单支付授权目录····等配置信息到服务器

调用上面代码中的openid转换接口转换openid

官方说明：http://kf.qq.com/faq/1901177NrqMr190117nqYJze.html openid转换接口

！！！迁移没完成前调用转换接口会报

！！！公众号id参数给错也会报上面错误

！！！转换方法请求头类型不是json 也会报 63178：from_appid参数错误，和调用的账号并没有迁移关系