员工表和部门表的关系是多对一
//员工类
public class Employee { private Integer id;
private Department department;
private String ename;
private String epwd;
}
//部门类
public class Department{
private Integer did;
private String dname;
private String location;
private Set tbEmployees = new HashSet(0);
}
有个添加员工的页面addemp.jsp
<form action="empManager!addEmp.action">
<input type="text" name="ename">
<input type="password" name="epwd">
<select name="did" id="did" >
<%
List list=(List)session.getAttribute("dlist");//dlist保存的是从数据库取出来的部门对象
for(int i=0;i<list.size();i++){
Department dm=(Department)list.get(i);
%>
<option value="<%=dm.getDid() %>"><%=dm.getDname() %></option>
<% } %>
</select>
//我想问的就是。部门的id怎么传到empManager中让这个action能取到部门id,然后再保存到数据库中
</form>

放个hidden，然后给select一个onchange事件，只要有话就将选中的option的value放入hidden中就可以啦。