Jsp遍历后台传过来的List三种方法
1：使用jstl标签 （可以和自定义标签配合使用）
首先引用jstl标签
- <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
然后使用foreach标签
- <c:forEach items="${list}" var="user" varStatus="vs">
- <tr>
- <td>
- <s:property value="#vs.index+1"/>
- td>
- <td align = "center">${user.PId}td>
- <td align = "center">${user.PLoginname}td>
- <td align = "center">${user.PUserName}td>
- <td align = "center">${user.PEmail}td>
- <td align = "center"><html:department pdeptid="${user.PDeptid}">html:department>td>
- tr>
- c:forEach>
可以用
后台可以把list放到值栈或者放到request.例如：request.setAttribute("list", XXXXlist);
2：使用jsp内嵌java代码遍历List (在后台把List放到session中，如果是大数据量，不应使用此方法)
首先在后台把list放入到session中
- request.getSession().setAttribute(<span style="color:#ff0000;">Data.ALLNEWSLISTspan>, list);
红色标记的Data.ALLNEWSLIST 为常量 在com.xiami.onlineshop.common包下的Data类中定义
- public static final String ALLNEWSLIST="ALLNEWSLIST";
jsp代码：(注意标红的代码不要忘记引入对应的类)
- <%@ page language="java" import="java.util.*,<span style="color:#ff0000;">com.xiami.onlineshop.common.*,com.xiami.onlineshop.data.*" span>pageEncoding="GBK"%>
- >
- <html>
- <head>
- head>
- <body>
- <%
- String ntype=null;
- int pagenum=1;
- if(request.getParameter("pagecurrent")!=null){
- pagenum=Integer.parseInt(request.getParameter("pagecurrent"));
- }
- List list=null;
- if(session.getAttribute(Data.ALLNEWSLIST)!=null){
- list = (List)session.getAttribute(Data.ALLNEWSLIST);
- int l = list.size();
- %>
- <table border=1 width="100%">
- <tr bgcolor="#8E8E8E">>>首页>商城动态tr>
- table>
- <br><br> font>center>
- <font color=#272727>第<%=pagenum %>页<Br><br>font>
- <table>
- <%
- for(int i=0;i<l;i++){
- News news =(News)list.get(i);
- ntype=news.getNtype();
- %>
- <tr bgcolor="#93FF93">
- <td bgcolor="#6C6C6C"><%=news.getNid() %>td>
- <td bgcolor="#ADADAD"><a href="servlet/ShowDetailNews?nid=<%=news.getNid() %>"><%=news.getNtitle() %>a>td>
- tr>
- <%
- }
- %>
- table><br>
- <a href="servlet/ShowAllNews?page=1&type=<%=ntype %>">首页a>
- <a href="servlet/ShowAllNews?page=<%=pagenum-1 %>&type=<%=ntype %>">上一页a>
- <a href="servlet/ShowAllNews?page=<%=pagenum+1 %>&type=<%=ntype %>">下一页a>
- <a href="servlet/ShowNewsEndPage?type=<%=ntype %>">尾页a>
- <%
- }
- %>
- body>
- html>
3：使用Struts标签
- <%@ taglib prefix="s" uri="/struts-tags"%>
- <s:iterator value="#request.userList" status="stat" id="sd">
- <tr align="center">
- <td>
- <s:property value="#sd[6]" />
- td>
- <td>
- <s:property value="#sd[1]" /> <span style="WHITE-SPACE: pre"> span>td>
- <td>
- <s:property value="#sd[2]">s:property>
- td>
- <td>
- <s:property value="#sd[4]">s:property>
- td>
- <td>
- <s:property value="#sd[5]">s:property>
- td>
- tr>
- s:iterator>