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: exceljava@163.com 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: exceljava@163.com
* 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？
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