角色实体

package cn.itcast.oa.domain;import java.util.HashSet;
import java.util.Set;/*** 岗位* * @author tyg* */
public class Role {private Long id;private String name;private String description;private Set<User> users = new HashSet<User>();private Set<Privilege> privileges = new HashSet<Privilege>();public Long getId() {return id;}public void setId(Long id) {this.id = id;}public Set<User> getUsers() {return users;}public void setUsers(Set<User> users) {this.users = users;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}public Set<Privilege> getPrivileges() {return privileges;}public void setPrivileges(Set<Privilege> privileges) {this.privileges = privileges;}}

权限实体

package cn.itcast.oa.domain;import java.util.HashSet;
import java.util.Set;/*** 权限* * @author tyg* */
public class Privilege {private Long id;private String url;private String name; // 权限名称private Set<Role> roles = new HashSet<Role>();private Privilege parent; // 上级权限private Set<Privilege> children = new HashSet<Privilege>(); // 下级权限public Privilege() {}public Privilege(String name, String url, Privilege parent) {this.name = name;this.url = url;this.parent = parent;}public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Set<Role> getRoles() {return roles;}public void setRoles(Set<Role> roles) {this.roles = roles;}public Privilege getParent() {return parent;}public void setParent(Privilege parent) {this.parent = parent;}public Set<Privilege> getChildren() {return children;}public void setChildren(Set<Privilege> children) {this.children = children;}}

两者映射

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping package="cn.itcast.oa.domain"><class name="Role" table="itcast_role"><id name="id"><generator class="native"/></id><property name="name" /><property name="description" /><!-- users属性，本类与User的多对多 --><set name="users" table="itcast_user_role"><key column="roleId"></key><many-to-many class="User" column="userId"></many-to-many></set><!-- privileges属性，本类与Privilege的多对多 --><set name="privileges" table="itcast_role_privilege" lazy="false"><key column="roleId"></key><many-to-many class="Privilege" column="privilegeId"></many-to-many></set>    </class></hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping package="cn.itcast.oa.domain"><class name="Privilege" table="itcast_privilege"><id name="id"><generator class="native"/></id><property name="url" /><property name="name" /><!-- roles属性，本类与Role的多对多--><set name="roles" table="itcast_role_privilege"><key column="privilegeId"></key><many-to-many class="Role" column="roleId"></many-to-many></set><!-- parent属性，本类与Privilege（上级）的多对一--><many-to-one name="parent" class="Privilege" column="parentId"></many-to-one><!-- children属性，本类与Privilege（下级）的一对多--><set name="children" lazy="false"><key column="parentId"></key><one-to-many class="Privilege"/></set></class></hibernate-mapping>

Hibernate实体映射总结

<!-- users属性，本类与User的一对多 -->
格式：？属性，本类与？的？
?1    属性名
?2    关联对类型
?3    关系

多对一：
        <many-to-one name="" class="" column=""></many-to-one>
    一对多（Set）：
        <set name="">
            <key column=""></key>
            <one-to-many class=""/>
        </set>
    多对多（Set）：
        <set name="" table="">
            <key column=""></key>
            <many-to-many class="" column=""></many-to-many>
        </set>