Struts2.3,<s:iterator>,<c:forEach>遍历map中的list集合

Myth丶恋晨 2024-02-17 14:58 46阅读 0赞

一：首先是<s:iterator></s:iterator>遍历map中的list集合，代码如下：

1.首先是后台代码，包括定义map和给map中赋值，代码如下：

package cn.gov.csrc.cms.action;
    
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import javax.annotation.Resource;
    
    import org.apache.struts2.ServletActionContext;
    import org.apache.struts2.convention.annotation.Action;
    import org.apache.struts2.convention.annotation.ExceptionMapping;
    import org.apache.struts2.convention.annotation.Result;
    import org.apache.struts2.dispatcher.SessionMap;
    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.UserInfo;
    import cn.gov.csrc.cms.service.UserService;
    import cn.gov.csrc.cms.util.Globals;
    import cn.gov.csrc.cms.util.PageData;
    import cn.gov.csrc.cms.util.PageNavUtil;
    
    import com.opensymphony.xwork2.ActionContext;
    
    @Controller
    @Scope("prototype")
    public class UserAction extends BaseAction<UserInfo>{
    
    	private static Logger logger = LoggerFactory.getLogger(UserAction.class);
    	
    	private static final long serialVersionUID = 1L;
    	
    	private Integer page;
    	
    	private Map<String, Object> dataMap;
    	
    	public UserAction(){
    		dataMap = new HashMap<String, Object>();
    	}
    	
    	@Resource
    	private UserService userService;
    	
    	public Integer getId() {
    		return id;
    	}
    
    	public void setId(Integer id) {
    		this.id = id;
    	}
    	
    	@Action(value = "UserAction_find", results = { @Result(name = "success", location = "/WEB-INF/admin/user/userList.jsp") })
    	public String find() {
    		page = page == null ? 1 : page < 1 ? 1:page;
    		int pageSize = 10;
    		PageData<UserInfo> pageData = this.userService.getUsers(page,pageSize,model.getUserName());
    		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;
    	}
    	
    	
    }

2.其次是在前台页面接收map中list的值，这里我用的是jsp接收值，代码如下：

<form action="./UserAction_delete.action" id="mainForm" method="post">
    	<table class="table table-striped table-hover">
    		<thead>
    			<tr>
    				<th style="width: 8px;">
    					<input type="checkbox" id="checkall" class="group-checkable" />
    				</th>
    				<th>编号</th>
    				<th>登录名</th>
    				<th>用户姓名</th>
    				<th>电话</th>
    				<th>部门</th>
    				<th>岗位</th>
    				<th>操作</th>
    			</tr>
    			 <c:if test="${totalCount==0}">
    				 <tr>
    					<td colspan="8">没有相关数据</td>
    				 </tr>
    			 </c:if>
    		</thead>
    		<s:iterator value="#session.dataMap.dataList" status="user" >
    		<tbody>
    			<tr class="odd gradeX">
    				<td class="hidden-480"><input type="checkbox" class="checkboxes" name="ids" value="${id }" /></td>
    				<td class="hidden-480"><s:property value="#user.index+1" /></td>
    				<td class="hidden-480"><s:property value="userName" /></td>
    				<td class="hidden-480"><s:property value="realName" /></td>
    				<td class="hidden-480"><s:property value="phone" /></td>
    				<td class="hidden-480"><s:property value="dept" /></td>
    				<td class="hidden-480"><s:property value="post" /></td>
    				<td class="hidden-480">
    					<s:url id="url" action="UserAction_toUpdate" namespace="/">
    					<s:param name="id" value="id" />
    					</s:url>
    					<a class="btn mini purple thickbox" title='编辑和用户权限' href="<s:property value="#url"/>">
    						<i class="icon-edit"></i>编辑和用户权限
    					</a>
    				</td>
    			</tr>
    		</tbody>
    		</s:iterator>
    	</table>
    </form>

二：其次是<c:forEach></c:forEach>遍历map中的list集合，代码如下：

1.后台代码和上面的一样；

2.前台代码如下：

<c:forEach items="${dataMap.dataList}" var="dataItem" varStatus="rowStatus" >
    <tbody>
    	<tr class="odd gradeX">
    		<td class="hidden-480"><input type="checkbox" class="checkboxes" name="ids" value="${dataItem.id }" /></td>
    		<td class="hidden-480"><s:property value="#dataItem.index+1" /></td>
    		<td class="hidden-480">${dataItem.userName}</td>
    		<td class="hidden-480"><s:property value="realName" /></td>
    		<td class="hidden-480"><s:property value="phone" /></td>
    		<td class="hidden-480"><s:property value="dept" /></td>
    		<td class="hidden-480"><s:property value="post" /></td>
    		<td class="hidden-480">
    			<s:url id="url" action="UserAction_toUpdate" namespace="/">
    			<s:param name="id" value="id" />
    			</s:url>
    			<a class="btn mini purple thickbox" title='编辑和用户权限' href="<s:property value="#url"/>">
    				<i class="icon-edit"></i>编辑和用户权限
    			</a>
    		</td>
    	</tr>
    </tbody>
    </c:forEach>