现在请大家看看Dept的实体类和对应的映射信息：

Dept实体类

package org.entity;import java.util.HashSet;
import java.util.Set;/*** Dept entity. @author MyEclipse Persistence Tools*/public class Dept implements java.io.Serializable {// Fieldsprivate Integer deptno;private String dname;private String loc;private Set emps = new HashSet(0);// Constructors/** default constructor */public Dept() {}/** full constructor */public Dept(String dname, String loc, Set emps) {this.dname = dname;this.loc = loc;this.emps = emps;}// Property accessorspublic Integer getDeptno() {return this.deptno;}public void setDeptno(Integer deptno) {this.deptno = deptno;}public String getDname() {return this.dname;}public void setDname(String dname) {this.dname = dname;}public String getLoc() {return this.loc;}public void setLoc(String loc) {this.loc = loc;}public Set getEmps() {return this.emps;}public void setEmps(Set emps) {this.emps = emps;}}

对应的是Dept.hbm信息

<?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="org.entity.Dept" table="DEPT" schema="PRO"><id name="deptno" type="java.lang.Integer"><column name="DEPTNO" precision="6" scale="0" /><generator class="native" /></id><property name="dname" type="java.lang.String"><column name="DNAME" length="14" /></property><property name="loc" type="java.lang.String"><column name="LOC" length="13" /></property><set name="emps" inverse="true"><key><column name="DEPTNO" precision="6" scale="0" /></key><one-to-many class="org.entity.Emp" /></set></class>
</hibernate-mapping>