1，错误描述

2，接口返回错误信息

{"base_resp":{"ret":200302,"err_msg":"verify token fail"}}

3，原因分析：

3.1，网上常见的demo都试了一遍；

4，处理方案：【把网上搜的方案，都进行测试，最后测试ok】

==测试不好使
@RequestMapping(value="/gzhNotice")
public void selectAlLNotice(HttpServletResponse response, HttpServletRequest request) throws Exception{
    String token="xxx";
    response.setContentType("text/plain;charset=UTF-8");
    response.getWriter().write("success");
}
==测试不好使
@RequestMapping(value="/gzhNotice1")
public String selectAlLNotice1(HttpServletResponse response, HttpServletRequest request) throws Exception{
    String token="xxx";
    LogUtil.Info("返回微信的报文："+state);
    return  "SUCCESS";
}
==测试不好使
@RequestMapping(value="/gzhNotice2")
public String selectAlLNotice2(HttpServletResponse response, HttpServletRequest request) throws Exception{
    String token="xxx";
    LogUtil.Info("返回微信的报文："+state);
    return  "success";
}
==测试好使【20240516好使】
@RequestMapping(value="/gzhNotice3")
public String selectAlLNotice3(HttpServletResponse response, HttpServletRequest request) throws Exception{
    String token="xxx";
    LogUtil.Info("返回微信的报文："+state);
    String echostr = request.getParameter("echostr");
    return  echostr;
}