many-to-many为例，有Position和User两张表，一个Position可以有多个Users，一个User也可以有多个 Position，中间的关联表为 test_user_position 。通过在PO中加入XDoclet，自动生成hbm配置文件。不废话，看代码。
package test;import java.util.Set;import java.util.TreeSet;/** *//*** @hibernate.class table="test_position"*/public class Position ...{private int id;private int name;private Set users = new TreeSet();/** *//*** @hibernate.id generaTor-class="identity" type="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public int getName() ...{return name;}public void setName(int name) ...{this.name = name;}/** *//*** @hibernate.set inverse="true" lazy="true" table="test_user_position"* @hibernate.collection-key column="position_id"* @hibernate.collection-many-to-many class="test.Users" column="user_id"*/public Set getUsers() ...{return users;}public void setUsers(Set users) ...{this.users = users;}}package test;import java.util.Set;import java.util.TreeSet;/** *//*** @hibernate.class table="test_position"*/public class Position ...{private int id;private int name;private Set users = new TreeSet();/** *//*** @hibernate.id generaTor-class="identity" type="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public int getName() ...{return name;}public void setName(int name) ...{this.name = name;}/** *//*** @hibernate.set inverse="true" lazy="true" table="test_user_position"* @hibernate.collection-key column="position_id"* @hibernate.collection-many-to-many class="test.Users" column="user_id"*/public Set getUsers() ...{return users;}public void setUsers(Set users) ...{this.users = users;}}package test;import java.util.Set;import java.util.TreeSet;/** *//*** @hibernate.class table="test_position"*/public class Position ...{private int id; private int name;private Set users = new TreeSet();/** *//*** @hibernate.id generaTor-class="identity" type="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public int getName() ...{return name;}public void setName(int name) ...{this.name = name;}/** *//*** @hibernate.set inverse="true" lazy="true" table="test_user_position"* @hibernate.collection-key column="position_id"* @hibernate.collection-many-to-many class="test.Users" column="user_id"*/public Set getUsers() ...{return users;}public void setUsers(Set users) ...{this.users = users;}}接下来是Users.javaJava代码package test;import java.util.*;/** *//*** @hibernate.class table="test_uses"*/public class Users ...{private int id;private String name;private Set positions = new TreeSet();/** *//*** @hibernate.id generaTor-class="identity" typ="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public String getName() ...{return name;}public void setName(String name) ...{this.name = name;}/** *//*** @hibernate.set table="test_user_position" lazy="true"* @hibernate.collection-key column="user_id"* @hibernate.collection-many-to-many class="test.Position" column="position_id"*/public Set getPositions() ...{return positions;}public void setPositions(Set positions) ...{this.positions = positions;}}view plaincopy to clipboardprint?package test;import java.util.*;/** *//*** @hibernate.class table="test_uses"*/public class Users ...{private int id;private String name;private Set positions = new TreeSet();/** *//** * @hibernate.id generaTor-class="identity" typ="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public String getName() ...{return name;}public void setName(String name) ...{this.name = name;}/** *//*** @hibernate.set table="test_user_position" lazy="true"* @hibernate.collection-key column="user_id"* @hibernate.collection-many-to-many class="test.Position" column="position_id"*/public Set getPositions() ...{return positions;}public void setPositions(Set positions) ...{this.positions = positions;}}package test;import java.util.*;/** *//*** @hibernate.class table="test_uses"*/public class Users ...{private int id;private String name;private Set positions = new TreeSet();/** *//*** @hibernate.id generaTor-class="identity" typ="int"*/public int getId() ...{return id;}public void setId(int id) ...{this.id = id;}/** *//*** @hibernate.property length="25"*/public String getName() ...{return name;}public void setName(String name) ...{this.name = name;}/** *//*** @hibernate.set table="test_user_position" lazy="true"* @hibernate.collection-key column="user_id"* @hibernate.collection-many-to-many class="test.Position" column="position_id"*/public Set getPositions() ...{return positions;}public void setPositions(Set positions) ...{this.positions = positions;}}
在Myeclipse中右键点击项目，选择“Properties”，从界面中选择”Myeclipse/XDoclet”，点击“Add Standard…”，添加“Standard Hibernate”，点击OK，结束设置。
在项目中建立Hibernate.cfg.xml，配置好SessionFacTory和数据源
右键点击项目，选择“Myeclipse/Run XDoclet”，将自动创建以上两个类对应的hbm文件。
注意：创建完成的hbm文件存在问题，里面有role和readonly属性，将前者改为name，后者删掉即可。
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