Hibernate无主键配置文件编写
1. 环境:jdk1.4+hibernate2.0+weblogic8
一般情况下，我们建的表都会有主键，然后根据hibernate的配置文件编写条件 有一个主键key，剩下的是Property的属性，对应的PO类也就是一个普通的javabean.然后根据HIBERNATE的轻量级session进行保存修改的操作等。
今天遇到了一张表，是没有主键的表，是一张从别处导过来的表。但是我需要用hibernate来进行操作。中间遇到一些曲折，最后觉得HIBERNATE不会搞的太麻烦吧，经过一篇博文的启发，终于找到了一种简洁的做法。
第一步:建表(略，无主键)
第二部:进行配置文件以及PO类的编写。
其中的做法就是没有主键，所以把一条记录看成一个主键，即组合主键<composite-id>
。
配置文件如下:
<hibernate-mapping>
<class name="com.cqgl.po.SaI18nLimitRulesPO" table="SA_I18N_LIMIT_RULES">
<composite-id>
<key-property name="aircompanyCode" type="Java.lang.String">
<column name="AIRCOMPANY_CODE" />
</key-property>
<key-property name="aircompanyName" type="java.lang.String">
<column name="AIRCOMPANY_NAME" />
</key-property>
<key-property name="canbinClass" type="java.lang.String">
<column name="CANBIN_CLASS" />
</key-property>
<key-property name="discountFrom">
<column name="DISCOUNT_FROM" />
</key-property>
<key-property name="discountTo">
<column name="DISCOUNT_TO" />
</key-property>
<key-property name="refundTicketsRule" type="java.lang.String">
<column name="REFUND_TICKETS_RULE" />
</key-property>
<key-property name="refundTicketsRuleEn" type="java.lang.String">
<column name="REFUND_TICKETS_RULE_EN" />
</key-property>
<key-property name="changeDateRule" type="java.lang.String">
<column name="CHANGE_DATE_RULE" />
</key-property>
<key-property name="changeDateRuleEn" type="java.lang.String">
<column name="CHANGE_DATE_RULE_EN" />
</key-property>
<key-property name="endorsementRule" type="java.lang.String">
<column name="ENDORSEMENT_RULE" />
</key-property>
<key-property name="endorsementRuleEn" type="java.lang.String">
<column name="ENDORSEMENT_RULE_EN" />
</key-property>
<key-property name="remark" type="java.lang.String">
<column name="REMARK" />
</key-property>
<key-property name="createTime" type="java.util.Date">
<column name="CREATE_TIME" />
</key-property>
<key-property name="createUserId" type="java.lang.String">
<column name="CREATE_USER_ID" />
</key-property>
<key-property name="updateTime" type="java.util.Date">
<column name="UPDATE_TIME" />
</key-property>
<key-property name="updateUserId" type="java.lang.String">
<column name="UPDATE_USER_ID" />
</key-property>
</composite-id>
</class>
</hibernate-mapping>
第三部:重写实体类中的OBJECT的equals方法和hashCode并且每个实体要实现java.io.Serializable接口
JAVA文件如下:
package com.cqgl.po;
import java.util.Date;
public class SaI18nLimitRulesPO implements java.io.Serializable {
private String aircompanyCode;
private String aircompanyName;
private String canbinClass;
private String discountFrom;
private String discountTo;
private String refundTicketsRule;
private String refundTicketsRuleEn;
private String changeDateRule;
private String changeDateRuleEn;
private String endorsementRule;
private String endorsementRuleEn;
private String remark;
private Date createTime;
private String createUserId;
private Date updateTime;
private String updateUserId;
public String getAircompanyCode() {
return this.aircompanyCode;
}
public void setAircompanyCode(String aircompanyCode) {
this.aircompanyCode = aircompanyCode;
}
public String getAircompanyName() {
return this.aircompanyName;
}
public void setAircompanyName(String aircompanyName) {
this.aircompanyName = aircompanyName;
}
public String getCanbinClass() {
return this.canbinClass;
}
public void setCanbinClass(String canbinClass) {
this.canbinClass = canbinClass;
}
public String getDiscountFrom() {
return this.discountFrom;
}
public void setDiscountFrom(String discountFrom) {
this.discountFrom = discountFrom;
}
public String getDiscountTo() {
return this.discountTo;
}
public void setDiscountTo(String discountTo) {
this.discountTo = discountTo;
}
public String getRefundTicketsRule() {
return this.refundTicketsRule;
}
public void setRefundTicketsRule(String refundTicketsRule) {
this.refundTicketsRule = refundTicketsRule;
}
public String getRefundTicketsRuleEn() {
return this.refundTicketsRuleEn;
}
public void setRefundTicketsRuleEn(String refundTicketsRuleEn) {
this.refundTicketsRuleEn = refundTicketsRuleEn;
}
public String getChangeDateRule() {
return this.changeDateRule;
}
public void setChangeDateRule(String changeDateRule) {
this.changeDateRule = changeDateRule;
}
public String getChangeDateRuleEn() {
return this.changeDateRuleEn;
}
public void setChangeDateRuleEn(String changeDateRuleEn) {
this.changeDateRuleEn = changeDateRuleEn;
}
public String getEndorsementRule() {
return this.endorsementRule;
}
public void setEndorsementRule(String endorsementRule) {
this.endorsementRule = endorsementRule;
}
public String getEndorsementRuleEn() {
return this.endorsementRuleEn;
}
public void setEndorsementRuleEn(String endorsementRuleEn) {
this.endorsementRuleEn = endorsementRuleEn;
}
public String getRemark() {
return this.remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
public Date getCreateTime() {
return this.createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public String getCreateUserId() {
return this.createUserId;
}
public void setCreateUserId(String createUserId) {
this.createUserId = createUserId;
}
public Date getUpdateTime() {
return this.updateTime;
}
public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}
public String getUpdateUserId() {
return this.updateUserId;
}
public void setUpdateUserId(String updateUserId) {
this.updateUserId = updateUserId;
}
// 注意这种情况下 我们需要重写equals和hashCode
public boolean equals(Object object) {
return true;
}
public int hashCode() {
return 1;
}
}
进行Hibernate的config文件配置，把实体类加入到映射中去，就可以进行到相应的查询操作了。更新修改操作还没有尝试，可能还是需要一些配置吧。
参考: http://blog.****.NET/zoucui/archive/2009/03/04/3955931.aspx