糊涂工具类（hutool）post请求设置body参数为json数据

/**
   * 添加动作
   * @param projectVo
   * @return
   */
  @Override
  public String addProjectV3(@RequestBody  ProjectVoV3 projectVo) {
    JSONObject jsonObjectResult = new JSONObject();
    //请求接口地址
    String url = TrainingSchemeConstant.addProjectV3;
    try {
      String body = HttpUtil.createPost(url)
        .contentType("application/json")
        .body(JSON.toJSONString(projectVo)).execute().body();
      if (StringUtils.isBlank(body)) {
        jsonObjectResult.putOpt("code", "500");
        jsonObjectResult.putOpt("data", null);
        jsonObjectResult.putOpt("msg", "操作失败");
        return jsonObjectResult.toString();
      }
      JSONObject obj = JSONUtil.parseObj(body);
      if (obj == null) {
        jsonObjectResult.putOpt("code", "500");
        jsonObjectResult.putOpt("data", null);
        jsonObjectResult.putOpt("msg", "操作失败");
        return jsonObjectResult.toString();
      }
      String code = obj.get("code").toString();
      if ("200".equals(code)) {
        jsonObjectResult.putOpt("code", "200");
        jsonObjectResult.putOpt("data",  obj.get("data"));
        jsonObjectResult.putOpt("msg", "操作成功");
        //标记有没有记录
        //jsonObjectResult.putOpt("count", obj.getJSONArray("data").size());
        return jsonObjectResult.toString();
      }
    } catch (Exception e) {
      log.error("获取训练方案失败：", e);
      e.printStackTrace();
    }
    return null;
  }

String body = HttpUtil.createPost(url)
        .contentType("application/json")
        .body(JSON.toJSONString(projectVo)).execute().body();
        ```