EL表达式, JSTL, 获取map集合中key的value

创建时间：2014-09-19 投稿人：浏览次数：16192

序言：今天在项目中使用了map存储list和普通对象，但是在jsp中显示的时候出来问题，后经查阅，终于解决，现在记录一下，以便以后查阅：

一：后台代码如下：

package cn.gov.csrc.cms.action;

import java.util.HashMap;
import java.util.Map;

import javax.annotation.Resource;

import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import cn.gov.csrc.base.action.BaseAction;
import cn.gov.csrc.cms.model.RoleInfo;
import cn.gov.csrc.cms.service.RoleService;
import cn.gov.csrc.cms.util.PageData;
import cn.gov.csrc.cms.util.PageNavUtil;

import com.opensymphony.xwork2.ActionContext;

@Controller
@Scope("prototype")
public class RoleAction extends BaseAction<RoleInfo>{
	
	private static Logger logger = LoggerFactory.getLogger(RoleAction.class);

	private static final long serialVersionUID = 1L;

	private Integer page;

	private Map<String, Object> dataMap;

	private RoleService roleService;

	public RoleAction() {
		dataMap = new HashMap<String, Object>();
	}

	@Resource
	public void setRoleService(RoleService roleService) {
		this.roleService = roleService;
	}
	
	@Action(value = "RoleAction_find", results={@Result(name = "success", location = "/ucenter/sys/roleList.jsp")})
	public String find(){
		page = page == null ? 1 : page < 1 ? 1:page;
		int pageSize = 5;
		PageData<RoleInfo> pageData = this.roleService.getRoles(page,pageSize,model.getRoleName());
		dataMap.clear();
		dataMap.put("dataList", pageData.getPageData());
		dataMap.put("totalCount", pageData.getTotalCount());
		dataMap.put("totalPage", pageData.getTotalPage());
		dataMap.put("currentPage", page);
		dataMap.put("pageNav", PageNavUtil.getPageNavHtml(page.intValue(), pageSize, pageData.getTotalCount(), 15));
		ActionContext.getContext().getSession().put("dataMap", dataMap);
		return "success";
	}

	public Integer getPage() {
		return page;
	}

	public void setPage(Integer page) {
		this.page = page;
	}
	
	
}

二：前台jsp代码如下：

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ include file="../../common/include_tag.jsp"%>
<%@ include file="../../common/page_var.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title><%=pageTitle%> - 角色管理</title>
<%@ include file="../../common/page_head.jsp"%>
<script type="text/javascript">
    function add(){
    	$.jBox("iframe:#.action", {
    	    title: "添加角色",
    	    width: 700,
    	    height: 320,
    	    buttons: {}
    	});
    }

    function edit(id){
    	$.jBox("iframe:#.action?id="+id, {
    	    title: "修改角色",
    	    width: 700,
    	    height: 320,
    	    buttons: {}
    	});
    }
    
    function delRole(id,msg){
    	$.jBox.confirm("确定删除 ["+msg+"] 角色吗？", "确认操作", function (v, h, f) {
    	    if (v == "ok"){
    	    	$.post("#.action",{id:id},function(responseText){
    	    		if(responseText==true){
    	    			$.jBox.info("操作成功，请刷新查看结果", "成功信息",{top: "20%"});
    	    		}else{
    	    			$.jBox.error("操作失败", "失败信息");
    	    		}
    	    	});
    		}
    	    return true; 
    	},{top: "40%"});
    }
    
    function changeRoleStatus(id,status){
    	$.jBox.confirm("确定 "+(status==0?"禁用":"启用")+" 用户吗？", "确认操作", function (v, h, f) {
    	    if (v == "ok"){
    	    	$.post("#.action",{id:id,status:status},function(responseText){
    	    		if(responseText==true){
    	    			$.jBox.info("操作成功，请刷新查看结果", "成功信息",{top: "20%"});
    	    		}else{
    	    			$.jBox.error("操作失败", "失败信息");
    	    		}
    	    	});
    		}
    	    return true; 
    	},{top: "40%"});
    }
    
    function roleResourceSet(roleId){
    	$.jBox("iframe:#.action?roleId="+roleId, {
    	    title: "角色资源授权",
    	    width: 700,
    	    height: 550,
    	    buttons: {}
    	});
    }
    
    $().ready(function(){
    	pilicat.alternately("list");
    });
    </script>
</head>
<body>
	<div style="height: 60px; overflow: hidden">
		<%@ include file="../u_top.jsp"%>
	</div>
	<div id="frame_side">
		<%@ include file="../u_login_info.jsp"%>
		<jsp:include page="../u_left_menu.jsp" flush="true">
			<jsp:param name="current" value="roles" />
		</jsp:include>
	</div>
	<div id="body_box">
		<table cellpadding="0" cellspacing="0" border="0" class="icon">
			<tr>
				<td></td>
			</tr>
		</table>
		<span style="text-align: left;padding-left: 10px;">系统管理 -> 角色管理 -> 角色列表</span>
		<table cellpadding="0" cellspacing="0" border="0" class="table">
			<tbody>
				<tr>
					<td valign="top" align="right">
						<form action="" method="get" name="search" id="search">
							<table cellpadding="0" cellspacing="5" border="0">
								<tbody>
									<tr>
										<td><a class="button_4" href="javascript:;" onclick="add();">添加新角色</a></td>
									</tr>
								</tbody>
							</table>
						</form>
					</td>
				</tr>
			</tbody>
		</table>
		<div class="rounded table">
			<form action="" method="get" name="search_form" id="search_form">
				<table width="100%" cellpadding="0" cellspacing="0" border="0"
					class="box_top">
					<tr>
						<td class="title">角色列表</td>
						<td></td>
					</tr>
				</table>
			</form>

			<form action="" method="post" name="manage" id="manage">
				<table class="list td_align" cellpadding="0" cellspacing="1"
					border="0">
					<tr>
						<td class="field_head" width="30">选择</td>
						<td class="field_head">角色ID</td>
						<td class="field_head">角色名称</td>
						<td class="field_head">角色描述</td>
						<td class="field_head">操作</td>
					</tr>
					<c:forEach items="${dataMap.dataList}" var="dataItem" varStatus="rowStatus">
					<tr>
						<td><input type="checkbox" name="cbitem" value="${dataItem.id }" /></td>
						<td>${dataItem.id}</td>
						<td>${dataItem.roleName}</td>
						<td>${dataItem.roleDesc}</td>
						<td class="operation"><a href="javascript:;"
							onclick="edit(${dataItem.id});"> <img
								src="./css/images/operation/pencil.png"
								title="修改角色信息" />
						</a>  <a href="javascript:;"
							onclick="roleResourceSet(${dataItem.id});"> <img
								src="./css/images/operation/folder.png"
								title="角色权限" />
						</a> <a href="javascript:;"
							onclick="delRole(${dataItem.id},"${dataItem.roleName}");"> <img
								src="./css/images/operation/trashcan_delete.png"
								title="删除角色" />
						</a></td>
					</tr>
					</c:forEach>
				</table>
				<table class="table top_line">
					<tr>
						<td>
							<table cellpadding="0" cellspacing="0" border="0">
								<tr>
									<td class="all_action"><input name="allChkbox"
										id="allChkbox" type="checkbox"
										onclick="pilicat.select_all(this.form);" /></td>
									<td> 全选/取消  </td>
									<td class="operation"></td>
								</tr>
							</table>
						</td>
					</tr>
				</table>
			</form>
			<table class="page" cellpadding="0" cellspacing="5">
				<tr>
					<td>
						<div id="pageNav" class="scott">
							<font color="#88af3f">共${dataMap["totalCount"]} 条数据， ${dataMap["totalPage"]} 页</font>
							${dataMap["pageNav"]}
						</div>
					</td>
				</tr>
			</table>
		</div>
		<%@ include file="../u_bottom.jsp"%>
	</div>
</body>
</html>

注：主要是下面的分页显示：

<div id="pageNav" class="scott">
							<font color="#88af3f">共${dataMap["totalCount"]} 条数据， ${dataMap["totalPage"]} 页</font>
							${dataMap["pageNav"]}
						</div>

声明：该文观点仅代表作者本人，入门客AI创业平台信息发布平台仅提供信息存储空间服务，如有疑问请联系rumenke@qq.com。

上一篇： Windows+Nginx+Tomcat搭建负载均衡和集群环境同时实现session共享(一)
下一篇：没有了

热门文章: jsp,div 限制字数，超出部分...; java限制在同一台电脑上只...; Windows+Nginx+Tomcat搭建负载均...; EL表达式, JSTL, 获取map集合...

最新文章: Windows+Nginx+Tomcat搭建负载均...; java限制在同一台电脑上只...; jsp,div 限制字数，超出部分...; Oracle中通过substr和instr实现...