[ 系统异常 ]nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one resul

后台数据查询接口的书写出错

报错内容：

[ 系统异常 ]nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

查询语句查出多条数据，但是返回的类型只能是一条

解决方案(改后代码):

/**ReportServiceImpl.java*/
@Override
public List<Report> findReportById(Integer id) {

    List<Report> report = reportMapper.findReportById(id);

    return report;
}

/**ReportController.java*/
@GetMapping("find_report_by_id")
public JsonData findReportById(Integer id){

    List<Report> report = reportService.findReportById(id);

    return JsonData.buildSuccess(report);

}

/**ReportMapper.java*/
List<Report> findReportById(@Param("id") Integer id);

/**ReportService*/
List<Report> findReportById(@Param("id") Integer id);