EL表达式问题？怎么获取对象的属性对象的属性对象的属性？

[享受幸福生活]

1、SSH的小虾米不懂是否可以获取对象的属性对象的属性对象的属性？
2、不可以的 话 用ognl表达式可以吗？
求解谢谢大虾。

list.jsp

	<table>
		<tbody>
			<tr>
				<td>序号</td>
				<td>工号</td>
				<td>姓名</td>
				<td>部门</td>
			</tr>


			<c:forEach items="${liveinfos }" var="liveinfo">
				<tr>
					<td>${liveinfo.live_id }</td>
					<td>${liveinfo.employee.emp_no }</td>
					<td>${liveinfo.employee.emp_name }</td>
					<td>${liveinfo.employee.department.dep_name }</td>
				</tr>

			</c:forEach>
		</tbody>
	</table>

Employee.hbm.xml

<?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">
<hibernate-mapping package="cn.model">
	<class name="cn.model.Employee" table="employee">
		<cache include="all" region="cn.model.Employee" usage="read-write" />

		<id type="integer" name="emp_id" column="emp_id">
			<generator class="native" />
		</id>
		<property generated="never" length="200" name="emp_name"
			not-null="true" type="string" />
		<property generated="never" length="200" name="emp_no" type="string" />
		<many-to-one name="depart" column="depart_id"></many-to-one>
</property>
		<one-to-one name="liveinfo" />
	</class>
</hibernate-mapping>

<?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">
<hibernate-mapping package="cn.model">
 <class name="cn.model.Department" table="department">
  <cache include="all" region="cn.model.Department" usage="read-write"/>

  <id type="integer" name="dep_id" column="dep_id"><generator class="identity" /></id>
  <property generated="never" length="200" name="dep_name" column="dep_name"  type="string"/>
  <property generated="never" length="200" name="dep_shortname" column="dep_shortname"   type="string"/>
  <set name="emp_set" >
  	<key column="depart_id"></key>
  	<one-to-many class="Employee" />
  </set>
  
  
 </class>
</hibernate-mapping>

action.java

	public String list(){
		ActionContext.getContext().put("liveinfos", liveinfoService.list());

		return "list";
	}

运行错误

org.apache.jasper.JasperException: An exception occurred processing JSP page /WEB-INF/page/liveinfoList.jsp at line 46

43: 					<td>${liveinfo.live_id }</td>
44: 					<td>${liveinfo.employee.emp_no }</td>
45: 					<td>${liveinfo.employee.emp_name }</td>
46: 					<td>${liveinfo.employee.department.dep_name }</td>

[花木兰1闪21A]

你看看employee中的department对象有没get set方法哦

[享受幸福生活]

有set 和get的嘛 ？？？？ department.java

package cn.model;

import java.util.Set;

public class Department {
	private Integer dep_id;
	private String dep_name;
	private String dep_shortname;
	private Set<Employee> emp_set;
	
	public Department(String dep_name, String dep_shortname) {
		super();
		this.dep_name = dep_name;
		this.dep_shortname = dep_shortname;
	}

	public Department(String dep_shortname) {
		super();
		this.dep_shortname = dep_shortname;
	}



	public Department() {
		super();
		// TODO Auto-generated constructor stub
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "<br/>部门名称："+dep_name+"<br/>部门简称："+dep_shortname;
	}

	/**
	 * @return the dep_id
	 */
	public Integer getDep_id() {
		return dep_id;
	}
	/**
	 * @param dep_id the dep_id to set
	 */
	public void setDep_id(Integer dep_id) {
		this.dep_id = dep_id;
	}
	/**
	 * @return the dep_name
	 */
	public String getDep_name() {
		return dep_name;
	}
	/**
	 * @param dep_name the dep_name to set
	 */
	public void setDep_name(String dep_name) {
		this.dep_name = dep_name;
	}
	/**
	 * @return the dep_shortname
	 */
	public String getDep_shortname() {
		return dep_shortname;
	}
	/**
	 * @param dep_shortname the dep_shortname to set
	 */
	public void setDep_shortname(String dep_shortname) {
		this.dep_shortname = dep_shortname;
	}
	/**
	 * @return the emp_set
	 */
	public Set<Employee> getEmp_set() {
		return emp_set;
	}
	/**
	 * @param emp_set the emp_set to set
	 */
	public void setEmp_set(Set<Employee> emp_set) {
		this.emp_set = emp_set;
	}
	
}

[花谢尊前不敢香]

employee内看不到department属性的配置，应该是<td>${liveinfo.employee.depart.dep_name }</td>吧

[花谢尊前不敢香]

突然结贴了，什么情况，是我说的哪个问题否？

[享受幸福生活]

EL表达式取值多层关系的对象 按照hibernate的映射文件里的对应名字取就好了， 我前后名字改的不一样就取不到值了。