hibernate无主键情况下无法更新

系统有张表没有设置主键。只有几个字段，采用hibernate配置如下：

package com.bester.hw.domain;

/**
 * @author xjj email: [email protected] 说明: 气象检测器报警条件表
 * @date Oct 20, 2008
 */
public class WeatherAlarmCondition implements java.io.Serializable {
	private WeatherAlarmConditionId id;

	public WeatherAlarmCondition() {
	}

	public WeatherAlarmCondition(WeatherAlarmConditionId id) {
		this.id = id;
	}

	public WeatherAlarmConditionId getId() {
		return this.id;
	}

	public void setId(WeatherAlarmConditionId id) {
		this.id = id;
	}

}

  

package com.bester.hw.domain;



/**
* @author xjj
* email: [email protected]
* 说明:  气象监测器报警条件表。复合主键下的domain    
* @date Oct 20, 2008
*/
public class WeatherAlarmConditionId implements java.io.Serializable {

	//基础数据
	private Float visibilityMin;
	private Float visibilityMax;
	private Float roadTempMin;
	private Float roadTempMax;
	private Float roadbedTempMin;
	private Float roadbedTempMax;
	private Float sensorTempMin;
	private Float sensorTempMax;
	private Float saltTiterMin;
	private Float saltTiterMax;
	private Float freezingTempMin;
	private Float freezingTempMax;
	private Integer levigationHeightMin;
	private Integer levigationHeightMax;
	private Float rainGaugeMin;
	private Float rainGaugeMax;
	private Float windSpeedMin;
	private Float windSpeedMax;
	private Float tempMin;
	private Float tempMax;
	private Float humidityMin;
	private Float humidityMax;


	// Property accessors

	public Float getVisibilityMin() {
		return this.visibilityMin;
	}

	public void setVisibilityMin(Float visibilityMin) {
		this.visibilityMin = visibilityMin;
	}

	public Float getVisibilityMax() {
		return this.visibilityMax;
	}

	public void setVisibilityMax(Float visibilityMax) {
		this.visibilityMax = visibilityMax;
	}

	public Float getRoadTempMin() {
		return this.roadTempMin;
	}

	public void setRoadTempMin(Float roadTempMin) {
		this.roadTempMin = roadTempMin;
	}

	public Float getRoadTempMax() {
		return this.roadTempMax;
	}

	public void setRoadTempMax(Float roadTempMax) {
		this.roadTempMax = roadTempMax;
	}

	public Float getRoadbedTempMin() {
		return this.roadbedTempMin;
	}

	public void setRoadbedTempMin(Float roadbedTempMin) {
		this.roadbedTempMin = roadbedTempMin;
	}

	public Float getRoadbedTempMax() {
		return this.roadbedTempMax;
	}

	public void setRoadbedTempMax(Float roadbedTempMax) {
		this.roadbedTempMax = roadbedTempMax;
	}

	public Float getSensorTempMin() {
		return this.sensorTempMin;
	}

	public void setSensorTempMin(Float sensorTempMin) {
		this.sensorTempMin = sensorTempMin;
	}

	public Float getSensorTempMax() {
		return this.sensorTempMax;
	}

	public void setSensorTempMax(Float sensorTempMax) {
		this.sensorTempMax = sensorTempMax;
	}

	public Float getSaltTiterMin() {
		return this.saltTiterMin;
	}

	public void setSaltTiterMin(Float saltTiterMin) {
		this.saltTiterMin = saltTiterMin;
	}

	public Float getSaltTiterMax() {
		return this.saltTiterMax;
	}

	public void setSaltTiterMax(Float saltTiterMax) {
		this.saltTiterMax = saltTiterMax;
	}

	public Float getFreezingTempMin() {
		return this.freezingTempMin;
	}

	public void setFreezingTempMin(Float freezingTempMin) {
		this.freezingTempMin = freezingTempMin;
	}

	public Float getFreezingTempMax() {
		return this.freezingTempMax;
	}

	public void setFreezingTempMax(Float freezingTempMax) {
		this.freezingTempMax = freezingTempMax;
	}

	public Integer getLevigationHeightMin() {
		return this.levigationHeightMin;
	}

	public void setLevigationHeightMin(Integer levigationHeightMin) {
		this.levigationHeightMin = levigationHeightMin;
	}

	public Integer getLevigationHeightMax() {
		return this.levigationHeightMax;
	}

	public void setLevigationHeightMax(Integer levigationHeightMax) {
		this.levigationHeightMax = levigationHeightMax;
	}

	public Float getRainGaugeMin() {
		return this.rainGaugeMin;
	}

	public void setRainGaugeMin(Float rainGaugeMin) {
		this.rainGaugeMin = rainGaugeMin;
	}

	public Float getRainGaugeMax() {
		return this.rainGaugeMax;
	}

	public void setRainGaugeMax(Float rainGaugeMax) {
		this.rainGaugeMax = rainGaugeMax;
	}

	public Float getWindSpeedMin() {
		return this.windSpeedMin;
	}

	public void setWindSpeedMin(Float windSpeedMin) {
		this.windSpeedMin = windSpeedMin;
	}

	public Float getWindSpeedMax() {
		return this.windSpeedMax;
	}

	public void setWindSpeedMax(Float windSpeedMax) {
		this.windSpeedMax = windSpeedMax;
	}

	public Float getTempMin() {
		return this.tempMin;
	}

	public void setTempMin(Float tempMin) {
		this.tempMin = tempMin;
	}

	public Float getTempMax() {
		return this.tempMax;
	}

	public void setTempMax(Float tempMax) {
		this.tempMax = tempMax;
	}

	public Float getHumidityMin() {
		return this.humidityMin;
	}

	public void setHumidityMin(Float humidityMin) {
		this.humidityMin = humidityMin;
	}

	public Float getHumidityMax() {
		return this.humidityMax;
	}

	public void setHumidityMax(Float humidityMax) {
		this.humidityMax = humidityMax;
	}

	public boolean equals(Object other) {
		if ((this == other))
			return true;
		if ((other == null))
			return false;
		if (!(other instanceof WeatherAlarmConditionId))
			return false;
		WeatherAlarmConditionId castOther = (WeatherAlarmConditionId) other;

		return ((this.getVisibilityMin() == castOther.getVisibilityMin()) || (this
				.getVisibilityMin() != null
				&& castOther.getVisibilityMin() != null && this
				.getVisibilityMin().equals(castOther.getVisibilityMin())))
				&& ((this.getVisibilityMax() == castOther.getVisibilityMax()) || (this
						.getVisibilityMax() != null
						&& castOther.getVisibilityMax() != null && this
						.getVisibilityMax()
						.equals(castOther.getVisibilityMax())))
				&& ((this.getRoadTempMin() == castOther.getRoadTempMin()) || (this
						.getRoadTempMin() != null
						&& castOther.getRoadTempMin() != null && this
						.getRoadTempMin().equals(castOther.getRoadTempMin())))
				&& ((this.getRoadTempMax() == castOther.getRoadTempMax()) || (this
						.getRoadTempMax() != null
						&& castOther.getRoadTempMax() != null && this
						.getRoadTempMax().equals(castOther.getRoadTempMax())))
				&& ((this.getRoadbedTempMin() == castOther.getRoadbedTempMin()) || (this
						.getRoadbedTempMin() != null
						&& castOther.getRoadbedTempMin() != null && this
						.getRoadbedTempMin().equals(
								castOther.getRoadbedTempMin())))
				&& ((this.getRoadbedTempMax() == castOther.getRoadbedTempMax()) || (this
						.getRoadbedTempMax() != null
						&& castOther.getRoadbedTempMax() != null && this
						.getRoadbedTempMax().equals(
								castOther.getRoadbedTempMax())))
				&& ((this.getSensorTempMin() == castOther.getSensorTempMin()) || (this
						.getSensorTempMin() != null
						&& castOther.getSensorTempMin() != null && this
						.getSensorTempMin()
						.equals(castOther.getSensorTempMin())))
				&& ((this.getSensorTempMax() == castOther.getSensorTempMax()) || (this
						.getSensorTempMax() != null
						&& castOther.getSensorTempMax() != null && this
						.getSensorTempMax()
						.equals(castOther.getSensorTempMax())))
				&& ((this.getSaltTiterMin() == castOther.getSaltTiterMin()) || (this
						.getSaltTiterMin() != null
						&& castOther.getSaltTiterMin() != null && this
						.getSaltTiterMin().equals(castOther.getSaltTiterMin())))
				&& ((this.getSaltTiterMax() == castOther.getSaltTiterMax()) || (this
						.getSaltTiterMax() != null
						&& castOther.getSaltTiterMax() != null && this
						.getSaltTiterMax().equals(castOther.getSaltTiterMax())))
				&& ((this.getFreezingTempMin() == castOther
						.getFreezingTempMin()) || (this.getFreezingTempMin() != null
						&& castOther.getFreezingTempMin() != null && this
						.getFreezingTempMin().equals(
								castOther.getFreezingTempMin())))
				&& ((this.getFreezingTempMax() == castOther
						.getFreezingTempMax()) || (this.getFreezingTempMax() != null
						&& castOther.getFreezingTempMax() != null && this
						.getFreezingTempMax().equals(
								castOther.getFreezingTempMax())))
				&& ((this.getLevigationHeightMin() == castOther
						.getLevigationHeightMin()) || (this
						.getLevigationHeightMin() != null
						&& castOther.getLevigationHeightMin() != null && this
						.getLevigationHeightMin().equals(
								castOther.getLevigationHeightMin())))
				&& ((this.getLevigationHeightMax() == castOther
						.getLevigationHeightMax()) || (this
						.getLevigationHeightMax() != null
						&& castOther.getLevigationHeightMax() != null && this
						.getLevigationHeightMax().equals(
								castOther.getLevigationHeightMax())))
				&& ((this.getRainGaugeMin() == castOther.getRainGaugeMin()) || (this
						.getRainGaugeMin() != null
						&& castOther.getRainGaugeMin() != null && this
						.getRainGaugeMin().equals(castOther.getRainGaugeMin())))
				&& ((this.getRainGaugeMax() == castOther.getRainGaugeMax()) || (this
						.getRainGaugeMax() != null
						&& castOther.getRainGaugeMax() != null && this
						.getRainGaugeMax().equals(castOther.getRainGaugeMax())))
				&& ((this.getWindSpeedMin() == castOther.getWindSpeedMin()) || (this
						.getWindSpeedMin() != null
						&& castOther.getWindSpeedMin() != null && this
						.getWindSpeedMin().equals(castOther.getWindSpeedMin())))
				&& ((this.getWindSpeedMax() == castOther.getWindSpeedMax()) || (this
						.getWindSpeedMax() != null
						&& castOther.getWindSpeedMax() != null && this
						.getWindSpeedMax().equals(castOther.getWindSpeedMax())))
				&& ((this.getTempMin() == castOther.getTempMin()) || (this
						.getTempMin() != null
						&& castOther.getTempMin() != null && this.getTempMin()
						.equals(castOther.getTempMin())))
				&& ((this.getTempMax() == castOther.getTempMax()) || (this
						.getTempMax() != null
						&& castOther.getTempMax() != null && this.getTempMax()
						.equals(castOther.getTempMax())))
				&& ((this.getHumidityMin() == castOther.getHumidityMin()) || (this
						.getHumidityMin() != null
						&& castOther.getHumidityMin() != null && this
						.getHumidityMin().equals(castOther.getHumidityMin())))
				&& ((this.getHumidityMax() == castOther.getHumidityMax()) || (this
						.getHumidityMax() != null
						&& castOther.getHumidityMax() != null && this
						.getHumidityMax().equals(castOther.getHumidityMax())));
	}

	public int hashCode() {
		int result = 17;

		result = 37
				* result
				+ (getVisibilityMin() == null ? 0 : this.getVisibilityMin()
						.hashCode());
		result = 37
				* result
				+ (getVisibilityMax() == null ? 0 : this.getVisibilityMax()
						.hashCode());
		result = 37
				* result
				+ (getRoadTempMin() == null ? 0 : this.getRoadTempMin()
						.hashCode());
		result = 37
				* result
				+ (getRoadTempMax() == null ? 0 : this.getRoadTempMax()
						.hashCode());
		result = 37
				* result
				+ (getRoadbedTempMin() == null ? 0 : this.getRoadbedTempMin()
						.hashCode());
		result = 37
				* result
				+ (getRoadbedTempMax() == null ? 0 : this.getRoadbedTempMax()
						.hashCode());
		result = 37
				* result
				+ (getSensorTempMin() == null ? 0 : this.getSensorTempMin()
						.hashCode());
		result = 37
				* result
				+ (getSensorTempMax() == null ? 0 : this.getSensorTempMax()
						.hashCode());
		result = 37
				* result
				+ (getSaltTiterMin() == null ? 0 : this.getSaltTiterMin()
						.hashCode());
		result = 37
				* result
				+ (getSaltTiterMax() == null ? 0 : this.getSaltTiterMax()
						.hashCode());
		result = 37
				* result
				+ (getFreezingTempMin() == null ? 0 : this.getFreezingTempMin()
						.hashCode());
		result = 37
				* result
				+ (getFreezingTempMax() == null ? 0 : this.getFreezingTempMax()
						.hashCode());
		result = 37
				* result
				+ (getLevigationHeightMin() == null ? 0 : this
						.getLevigationHeightMin().hashCode());
		result = 37
				* result
				+ (getLevigationHeightMax() == null ? 0 : this
						.getLevigationHeightMax().hashCode());
		result = 37
				* result
				+ (getRainGaugeMin() == null ? 0 : this.getRainGaugeMin()
						.hashCode());
		result = 37
				* result
				+ (getRainGaugeMax() == null ? 0 : this.getRainGaugeMax()
						.hashCode());
		result = 37
				* result
				+ (getWindSpeedMin() == null ? 0 : this.getWindSpeedMin()
						.hashCode());
		result = 37
				* result
				+ (getWindSpeedMax() == null ? 0 : this.getWindSpeedMax()
						.hashCode());
		result = 37 * result
				+ (getTempMin() == null ? 0 : this.getTempMin().hashCode());
		result = 37 * result
				+ (getTempMax() == null ? 0 : this.getTempMax().hashCode());
		result = 37
				* result
				+ (getHumidityMin() == null ? 0 : this.getHumidityMin()
						.hashCode());
		result = 37
				* result
				+ (getHumidityMax() == null ? 0 : this.getHumidityMax()
						.hashCode());
		return result;
	}

}

 配置文件如下：

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="com.bester.hw.domain.WeatherAlarmCondition" table="T_WEATHER_ALARM_CONDITION" schema="dbo" catalog="highway">
        <composite-id name="id" class="com.bester.hw.domain.WeatherAlarmConditionId">
            <key-property name="visibilityMin" type="java.lang.Float">
                <column name="visibility_min" precision="53" scale="0" />
            </key-property>
            <key-property name="visibilityMax" type="java.lang.Float">
                <column name="visibility_max" precision="53" scale="0" />
            </key-property>
            <key-property name="roadTempMin" type="java.lang.Float">
                <column name="road_temp_min" precision="53" scale="0" />
            </key-property>
            <key-property name="roadTempMax" type="java.lang.Float">
                <column name="road_temp_max" precision="53" scale="0" />
            </key-property>
            <key-property name="roadbedTempMin" type="java.lang.Float">
                <column name="roadbed_temp_min" precision="53" scale="0" />
            </key-property>
            <key-property name="roadbedTempMax" type="java.lang.Float">
                <column name="roadbed_temp_max" precision="53" scale="0" />
            </key-property>
            <key-property name="sensorTempMin" type="java.lang.Float">
                <column name="sensor_temp_min" precision="53" scale="0" />
            </key-property>
            <key-property name="sensorTempMax" type="java.lang.Float">
                <column name="sensor_temp_max" precision="53" scale="0" />
            </key-property>
            <key-property name="saltTiterMin" type="java.lang.Float">
                <column name="salt_titer_min" precision="53" scale="0" />
            </key-property>
            <key-property name="saltTiterMax" type="java.lang.Float">
                <column name="salt_titer_max" precision="53" scale="0" />
            </key-property>
            <key-property name="freezingTempMin" type="java.lang.Float">
                <column name="freezing_temp_min" precision="53" scale="0" />
            </key-property>
            <key-property name="freezingTempMax" type="java.lang.Float">
                <column name="freezing_temp_max" precision="53" scale="0" />
            </key-property>
            <key-property name="levigationHeightMin" type="java.lang.Integer">
                <column name="levigation_height_min" />
            </key-property>
            <key-property name="levigationHeightMax" type="java.lang.Integer">
                <column name="levigation_height_max" />
            </key-property>
            <key-property name="rainGaugeMin" type="java.lang.Float">
                <column name="rain_gauge_min" precision="53" scale="0" />
            </key-property>
            <key-property name="rainGaugeMax" type="java.lang.Float">
                <column name="rain_gauge_max" precision="53" scale="0" />
            </key-property>
            <key-property name="windSpeedMin" type="java.lang.Float">
                <column name="wind_speed_min" precision="53" scale="0" />
            </key-property>
            <key-property name="windSpeedMax" type="java.lang.Float">
                <column name="wind_speed_max" precision="53" scale="0" />
            </key-property>
            <key-property name="tempMin" type="java.lang.Float">
                <column name="temp_min" precision="53" scale="0" />
            </key-property>
            <key-property name="tempMax" type="java.lang.Float">
                <column name="temp_max" precision="53" scale="0" />
            </key-property>
            <key-property name="humidityMin" type="java.lang.Float">
                <column name="humidity_min" precision="53" scale="0" />
            </key-property>
            <key-property name="humidityMax" type="java.lang.Float">
                <column name="humidity_max" precision="53" scale="0" />
            </key-property>
        </composite-id>
    </class>
</hibernate-mapping>

 然后通过hibernate进行查找没有问题，可是就是无法进行更新。结合Struts2使用，代码如下：

	/**
	 * 功能:转向修改视图
	 * @return
	 * @date Oct 23, 2008
	 * @time 3:42:44 PM
	 */
	public String toUpdateAC(){
		List<WeatherAlarmCondition> wacList=cs.getWeatherAlarmConditionService().findAll(new WeatherAlarmCondition());
		if(wacList.size()!=0){
			ac=wacList.get(0);
		};
		this.initLog();
		return SUCCESS;
	}
	/**
	 * 功能:修改气象检测器报警条件
	 * @return
	 * @date Oct 23, 2008
	 * @time 3:49:21 PM
	 */
	public String updateAC(){
		cs.getWeatherAlarmConditionService().update(ac);
		this.operateString="修改气象检测器报警条件";
		return SUCCESS;
	}

 

如果使用saveOrUpdate,merge方法，则更改都变成了重新插入。如果用update方法，数据库数据无任何变化。难道没有主键的情况下，hibernate的session中不对对象的状态进行自动维护吗？