hibernate 一对多单向xml配置方式 Web程序

public class Battery {
    private Integer id;//编号
    private Set<BatteryVoltage> voltageList =new HashSet<>(); 

public class BatteryVoltage {
    private Integer id;//ID
    private Integer number;//编号
    private Double voltage;  //电压
    private Integer equipmentID;//

        <set name="voltageList" inverse="true" cascade="delete">
            <key column="equipmentID"/>
            <one-to-many class="xdemo.entity.BatteryVoltage"/>
         </set>