Struts+Hibernate显示主从表数据

//主表bean
public abstract class AbstractExamName  implements java.io.Serializable {


    // Fields   

     private String pk;
     private String year;
     private String term;
     private String name;
     private Set numberShowingsPlans = new HashSet(0);


    // Constructors

    /** default constructor */
    public AbstractExamName() {
    }

   
    /** full constructor */
    public AbstractExamName(String year, String term, String name, Set numberShowingsPlans) {
        this.year = year;
        this.term = term;
        this.name = name;
        this.numberShowingsPlans = numberShowingsPlans;
    }

  
    // Property accessors

    public String getPk() {
        return this.pk;
    }
   
    public void setPk(String pk) {
        this.pk = pk;
    }

    public String getYear() {
        return this.year;
    }
   
    public void setYear(String year) {
        this.year = year;
    }

    public String getTerm() {
        return this.term;
    }
   
    public void setTerm(String term) {
        this.term = term;
    }

    public String getName() {
        return this.name;
    }
   
    public void setName(String name) {
        this.name = name;
    }

    public Set getNumberShowingsPlans() {
        return this.numberShowingsPlans;
    }
   
    public void setNumberShowingsPlans(Set numberShowingsPlans) {
        this.numberShowingsPlans = numberShowingsPlans;
    }

public class ExamName extends AbstractExamName implements java.io.Serializable {

    // Constructors

    /**
     *
     */
    private static final long serialVersionUID = 1L;


    /** default constructor */
    public ExamName() {
    }

   
    /** full constructor */
    public ExamName(String year, String term, String name, Set numberShowingsPlans) {
        super(year, term, name, numberShowingsPlans);       
    }
  
}

//从表bean
public abstract class AbstractNumberShowingsPlan  implements java.io.Serializable {


    // Fields   

     private String pk;
     private ExamName examName;
     private String numberShowings;
     private Date beginTime;
     private Date endTime;


    // Constructors

    /** default constructor */
    public AbstractNumberShowingsPlan() {
    }

    /** minimal constructor */
    public AbstractNumberShowingsPlan(ExamName examName) {
        this.examName = examName;
    }
   
    /** full constructor */
    public AbstractNumberShowingsPlan(ExamName examName, String numberShowings, Date beginTime, Date endTime) {
        this.examName = examName;
        this.numberShowings = numberShowings;
        this.beginTime = beginTime;
        this.endTime = endTime;
    }

  
    // Property accessors

    public String getPk() {
        return this.pk;
    }
   
    public void setPk(String pk) {
        this.pk = pk;
    }

    public ExamName getExamName() {
        return this.examName;
    }
   
    public void setExamName(ExamName examName) {
        this.examName = examName;
    }

    public String getNumberShowings() {
        return this.numberShowings;
    }
   
    public void setNumberShowings(String numberShowings) {
        this.numberShowings = numberShowings;
    }

    public Date getBeginTime() {
        return this.beginTime;
    }
   
    public void setBeginTime(Date beginTime) {
        this.beginTime = beginTime;
    }

    public Date getEndTime() {
        return this.endTime;
    }
   
    public void setEndTime(Date endTime) {
        this.endTime = endTime;
    }

public class NumberShowingsPlan extends AbstractNumberShowingsPlan implements java.io.Serializable {

    // Constructors

    /**
     *
     */
    private static final long serialVersionUID = 1L;

    /** default constructor */
    public NumberShowingsPlan() {
    }

    /** minimal constructor */
    public NumberShowingsPlan(ExamName examName) {
        super(examName);       
    }
   
    /** full constructor */
    public NumberShowingsPlan(ExamName examName, String numberShowings, Date beginTime, Date endTime) {
        super(examName, numberShowings, beginTime, endTime);       
    }
  
}

--------------------------------hibernate配置-------------------------------------------------------
<hibernate-mapping>
    <class name="com.ems.database.hibernate3.pojo.ExamName" table="EXAM_NAME" schema="EMS">
        <id name="pk" type="string">
            <column name="PK" length="32" />
            <generator class="uuid.hex" />
        </id>
        <property name="year" type="string">
            <column name="YEAR" length="10" />
        </property>
        <property name="term" type="string">
            <column name="TERM" length="10" />
        </property>
        <property name="name" type="string">
            <column name="NAME" length="50" />
        </property>
        <set name="numberShowingsPlans" inverse="true" lazy="false">
            <key>
                <column name="FK_EXAM_NAME" length="32" not-null="true" />
            </key>
            <one-to-many class="com.ems.database.hibernate3.pojo.NumberShowingsPlan" />
        </set>
    </class>
</hibernate-mapping>

<hibernate-mapping>
    <class name="com.ems.database.hibernate3.pojo.NumberShowingsPlan" table="NUMBER_SHOWINGS_PLAN" schema="EMS">
        <id name="pk" type="string">
            <column name="PK" length="32" />
            <generator class="uuid.hex" />
        </id>
        <many-to-one name="examName" class="com.ems.database.hibernate3.pojo.ExamName" fetch="select">
            <column name="FK_EXAM_NAME" length="32" not-null="true" />
        </many-to-one>
        <property name="numberShowings" type="string">
            <column name="NUMBER_SHOWINGS" length="20" />
        </property>
        <property name="beginTime" type="date">
            <column name="BEGIN_TIME" length="7" />
        </property>
        <property name="endTime" type="date">
            <column name="END_TIME" length="7" />
        </property>
    </class>
</hibernate-mapping>

-------------------------------------------------Struts jsp页面显示-----------------------------------------

        <logic:present name="QueryObject">
            <TABLE border="0" cellspacing="1" cellpadding="2" width="100%" align="center" class="tableborder">
                <TR class="trHead">
                    <TD width="8%" height="23" align="center">
                       <bean:message key="com.sel"/>
                    </TD>
                    <TD width="12%" align="center">
                       <bean:message key="com.year"/>
                    </TD>
                    <TD width="20%" align="center">
                       <bean:message key="examname.term"/>
                    </TD>
                    <TD width="50%" align="center">
                       <bean:message key="examname.name"/>
                    </TD>
                    <TD width="10%" align="center">
                       <bean:message key="com.oper"/>
                    </TD>
                </TR>

                <logic:iterate id="element" name="QueryObject">
                  
                    <TR class="tr">
                        <TD width="8%" height="20" align="center">
                            <INPUT type="radio" name="select" value='<bean:write name="element" property="pk"/>'>
                        </TD>
                        <TD width="12%">
                            <bean:write name="element" property="year" />
                        </TD>
                        <TD width="20%">
                            <bean:write name="element" property="term" />
                        </TD>
                        <TD width="50%">
                            <bean:write name="element" property="name" />
                        </TD>
                        <TD width="10%" align="center">
                            <a href="./editExamNameFind.do?pk=<bean:write name='element' property='pk'/>">
                             <img border="0" src="<%=request.getContextPath()%>/skin/<bean:write name="user" property="skin"/>/edit.gif" title="<bean:message key='com.oper.edit'/>"/></a>
                            <a href="./delExamName.do?pk=<bean:write name='element' property='pk'/>">
                             <img border="0" src="<%=request.getContextPath()%>/skin/<bean:write name="user" property="skin"/>/del.gif" title="<bean:message key='com.oper.delete'/>"/></a>
                        </TD>
                    </TR>
          
                    <tr>
                        <td colspan="5">
                            <table border="0" cellspacing="1" width="100%" align="center" class="tableborder">
                                <tr class="trHead">
                                    <td width="8%" height="20" align="center">
                                        <bean:message key="com.index"/>
                                    </td>
                                    <td width="12%" align="center">
                                        <bean:message key="numbershowingplan.numberShowings"/>
                                    </td>
                                    <td width="35%" align="center">
                                        <bean:message key="numbershowingplan.beginTime"/>
                                    </td>
                                    <td width="35%" align="center">
                                        <bean:message key="numbershowingplan.beginTime"/>
                                    </td>
                                    <td width="10%" align="center">
                                        <bean:message key="com.oper"/>
                                    </td>
                                </tr>
                               
                                <logic:iterate id="rule" name="element" property="numberShowingsPlans" indexId="idxid">
                                <tr class="tr">
                                    <td width="8%" height="20" align="center">
                                        <bean:write name="idxid"/>
                                    </td>
                                    <td width="12%" align="center">
                                        <bean:write name="rule" property="numberShowings"/>
                                    </td>
                                    <td width="35%" align="center">
                                        <bean:write name="rule" property="beginTime"/>
                                    </td>
                                    <td width="35%" align="center">
                                        <bean:write name="rule" property="endTime"/>
                                    </td>
                                    <td width="10%">
                                        <a href="./editExamNameFind.do?pk=<bean:write name='element' property='pk'/>">
                                         <img border="0" src="<%=request.getContextPath()%>/skin/<bean:write name="user" property="skin"/>/edit.gif" title="<bean:message key='com.oper.edit'/>"/></a>
                                        <a href="./delExamName.do?pk=<bean:write name='element' property='pk'/>">
                                         <img border="0" src="<%=request.getContextPath()%>/skin/<bean:write name="user" property="skin"/>/del.gif" title="<bean:message key='com.oper.delete'/>"/></a>
                                    </td>
                                </tr>
                                </logic:iterate>
                            </table>
                        </td>
                    </tr>
                </logic:iterate>

            </TABLE>

        </logic:present>