tkMyBatista 传值Example 出现系统错误

Question

问题遇到的现象和发生背景

service 层

    错误代码
    Example exampleById = new Example(NewbaseOnlineUpdateVersionDO.class);
    exampleById.createCriteria().andEqualTo("id",ao.getId());
    NewbaseOnlineUpdateVersionDO versionDOById = newbaseOnlineUpdateService.selectVersionByExample(exampleById);
    if (null == versionDOById){
       throw new BizException("所修改的数据不存在");
    }

    修改后的正确代码
     NewbaseOnlineUpdateVersionDO versionDOById = newbaseOnlineUpdateService.selectVersionById(ao.getId());
    if (null == versionDOById){
        throw new BizException("所修改的数据不存在");
    }

mapper 层

    错误代码
   public NewbaseOnlineUpdateVersionDO selectVersionByExample(Example example) {
         return newbaseOnlineUpdateVersionMapper.selectOneByExample(example);
    }

  修改后的代码
  public NewbaseOnlineUpdateVersionDO selectVersionById(Long id) {
    Example example = new Example(NewbaseOnlineUpdateVersionDO.class);
    example.createCriteria()
            .andEqualTo("id",id);
    return newbaseOnlineUpdateVersionMapper.selectOneByExample(example);
}

错误代码会出现方法执行异常 搞不懂为什么?

Answer 1

错误提示信息呢，看下错误提示。