hibernate 继承映射中的几点问题

来源：互联网发布：洛克人网络争霸百度云编辑：程序博客网时间：2024/05/16 19:45

public class SysModule { /** * 主键 */ private int id; /** * 唯一标示 */ private String sn; /** * 模块名称 */ private String sysModuleName; /** * 模块地址 */ private String sysUrl; /** * 同一层次上各个模块之间的排序 */ private int orderId; /** * 是否叶子节点 */ private int isLeaf; /** * 所在层 */ private String sysLevel; /** * 备注 */ private String remark; /** * 孩子模块 */ private Set<SysModule> childModules; /** * 上级模块 */ private SysModule parentModule; //.... setter getter｝ public class OrgDep extends SysModule { // 无属性}

public class OrgPost extends SysModule { // 无属性}

<hibernate-mapping package="cn.xyurp.system.bean"><class name="cn.xyurp.system.bean.SysModule"table="t_sysmodule"><id name="id"><generator class="native" /></id><property name="sysModuleName" length="50" not-null="true" /><property name="sysUrl" length="50" /><property name="orderId" not-null="true"/><property name="sn" length="20" not-null="true"/><property name="isLeaf" not-null="true"/><property name="sysLevel" not-null="true"/><property name="remark" length="3000" /><many-to-one column="pid" name="parentModule" /><set name="childModules" lazy="extra" inverse="true"order-by="orderId"><key column="pid" /><one-to-many class="cn.xyurp.system.bean.SysModule" /></set></class></hibernate-mapping>

<hibernate-mapping package="cn.xyurp.rsgl.bean"><class name="OrgDep" table="t_rsgl_Org_dep"><id name="id"><generator class="native" /></id><property name="sn" column="orgId" type="string" length="50" not-null="true"></property><property name="sysModuleName" column="depName" length="50" not-null="true" /><property name="orderId" not-null="true"/><many-to-one column="pid" name="parentModule" /><set name="childModules" lazy="extra" inverse="true" order-by="orderId"><key column="pid" /><one-to-many class="OrgDep" /></set><property name="remark" type="string" length="3000"></property></class></hibernate-mapping>

<hibernate-mapping package="cn.xyurp.rsgl.bean"><class name="OrgPost" table="t_rsgl_Org_post"><id name="id"><generator class="native" /></id><property name="sn" column="postId" type="string" length="50" not-null="true"></property><property name="sysModuleName" column="postName" length="50" not-null="true" /><property name="orderId" not-null="true"/><many-to-one column="pid" name="parentModule" /><set name="childModules" lazy="extra" inverse="true"order-by="orderId"><key column="pid" /><one-to-many class="OrgPost" /></set><property name="remark" type="string" length="3000"></property></class></hibernate-mapping>

select count(*) from SysModule ...会生成三条 sql select count(*) from t_sysModule select count(*) from t_rsgl_org_dep select count(*) from t_rsgl_org_post

hibernate 继承 映射中的几点问题

hibernate 继承映射中的几点问题