表达式语言的集合操作
Servlet文件:
List <Dept>all=new ArrayList<Dept>();
Dept dept=null;
dept=new Dept();
dept.setDeptno(01);
dept.setDname("研发部");
dept.setLoc("办公楼二楼");
all.add(dept);
dept.setDeptno(02);
dept.setDname("销售部");
dept.setLoc("办公楼1楼");
all.add(dept);
request.setAttribuate("alldept",all);
request.getRequestDispatcher("dept_list.jsp").forward(requesr,response);//通过服务器跳转传递request属性
dept_list.jsp:
<body>
<%
List all=(List) request.getAttribute("alldept");
if(all!=null){
%>
<table border="1" width="90%">
<tr>
<td>部门编号</td>
<td>部门名称</td>
<td>部门位置</td>
</tr>
<%
Iterator iter=all.iterator();
while(iter.hasNext()){
pageContext.setAttribute("dept",iter.next));
%>
<tr>
<td>${dept.deptno}</td>
<td>${dept.dname}</td>
<td>${dept.loc}</td>
</TR>
<%
}
%>
</table>
<%
}
%>
</body>
web.xml:
<servlet>
<servlet-name>ELListServlet</servlet-name>
<servlet-class>
*.ELListServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ELListServlet</servlet-name>
<url-pattern>.....</url-pattern>
</servlet-mapping>
