Struts标签<s:iterator>遍历访问复杂Map对象
2023-09-14 08:57:44 时间
<s:iterator value="resultType" id="geneUi"> //拿到要遍历的Map对象 <s:iterator value="#geneUi.value" id="typeMap"> //取得Map对象里代表value值的嵌套Map对象 <tr> <s:iterator value="#typeMap.value" id="typeB"> //取得嵌套的Map对象中代表value值的List对象 <td><s:property value="#typeMap.key"/></td> //取得嵌套Map对象中遍历的每个元素的key值 <td><s:property value="#typeMap.value.size"/></td> //取得List对象的大小 <td><s:property value="typeB"/></td> //取得List对象的每个元素值 </s:iterator> </tr> </s:iterator> </s:iterator> 其中第一个iterator的value值resultType为下面action中的成员变量 public class ***Action extends SupportAction { private Map<String, Map<String, List<String>>> resultType = new HashMap<String, Map<String,List<String>>>(); .......... ......... }
package com.zx.demo.action; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.opensymphony.xwork2.ActionSupport; import com.zx.demo.model.Product; import com.zx.demo.model.Student; public class MapAction extends ActionSupport { private Map<String,String> map; private Map<String,Student> studentMap; private Map<String,String[]> arrayMap; private Map<String,List<Student>> listMap; public String testMap() { map=new HashMap<String,String>(); map.put("1", "one"); map.put("2", "two"); studentMap=new HashMap<String,Student>(); studentMap.put("student1",new Student(new Long(1),"20034140201","张三1","男",25)); studentMap.put("student2",new Student(new Long(2),"20034140202","张三2","女",26)); studentMap.put("student3",new Student(new Long(3),"20034140202","张三3","男",27)); arrayMap=new HashMap<String,String[]>(); arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"}); arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"}); arrayMap.put("arr3", new String[]{"3","2003403","lixiaoning","male","21"}); listMap=new HashMap<String,List<Student>>(); List<Student> list1=new ArrayList<Student>(); list1.add(new Student(new Long(1),"20034140201","张三1","男",25)); list1.add(new Student(new Long(2),"20034140202","张三2","男",25)); list1.add(new Student(new Long(3),"20034140203","张三3","男",25)); listMap.put("class1", list1); List<Student> list2=new ArrayList<Student>(); list2.add(new Student(new Long(1),"20034140301","李四1","男",20)); list2.add(new Student(new Long(2),"20034140302","李四2","男",21)); list2.add(new Student(new Long(3),"20034140303","李四3","男",22)); list2.add(new Student(new Long(4),"20034140304","李四4","男",23)); listMap.put("class2", list2); return SUCCESS; } public Map<String, String> getMap() { return map; } public void setMap(Map<String, String> map) { this.map = map; } public Map<String, Student> getStudentMap() { return studentMap; } public void setStudentMap(Map<String, Student> studentMap) { this.studentMap = studentMap; } public Map<String, String[]> getArrayMap() { return arrayMap; } public void setArrayMap(Map<String, String[]> arrayMap) { this.arrayMap = arrayMap; } public Map<String, List<Student>> getListMap() { return listMap; } public void setListMap(Map<String, List<Student>> listMap) { this.listMap = listMap; } }
<%@ page contentType="text/html;charset=UTF-8" %> <%@ taglib prefix="s" uri="/struts-tags" %> <html> <head> <title>struts2中的map遍历总结</title> </head> <body> <b>1.map中的value为String字符串</b><br> <s:iterator value="map" id="column"> <s:property value="#column"/><br> key: <s:property value="key"/><br> value:<s:property value="value"/><br> ******************************************<br> </s:iterator> <b>2.map中的value为Student对象</b> <table border="1" width="50%" cellspacing="0" cellpadding="0"> <tr> <td>key=value</td> <td>ID</td> <td>num</td> <td>name</td> <td>sex</td> <td>age</td> </tr> <s:iterator value="studentMap" id="column"> <tr> <td><s:property value="#column"/></td> <td><s:property value="value.id"/></td> <td><s:property value="value.num"/></td> <td><s:property value="value.name"/></td> <td><s:property value="value.sex"/></td> <td><s:property value="value.age"/></td> </tr> </s:iterator> </table> <p> <b>3.map中的value为String数组</b> <table border="1" width="50%" cellspacing="0" cellpadding="0"> <tr> <td>key=value</td> <td>ID</td> <td>num</td> <td>name</td> <td>sex</td> <td>age</td> </tr> <s:iterator value="arrayMap" id="column"> <tr> <td><s:property value="#column"/></td> <td><s:property value="value[0]"/></td> <td><s:property value="value[1]"/></td> <td><s:property value="value[2]"/></td> <td><s:property value="value[3]"/></td> <td><s:property value="value[4]"/></td> </tr> </s:iterator> </table> <p> <b>4.map中的value为list集合</b> <table border="1" width="50%" cellspacing="0" cellpadding="0"> <tr> <td>class</td> <td>ID</td> <td>num</td> <td>name</td> <td>sex</td> <td>age</td> </tr> <s:iterator value="listMap" id="column"> <s:set name="total" value="#column.value.size"/> <s:iterator value="#column.value" status="s"> <tr> <s:if test="#s.first"><td rowspan="${total}"><s:property value="#column.key"/></td></s:if> <td><s:property value="id"/></td> <td><s:property value="num"/></td> <td><s:property value="name"/></td> <td><s:property value="sex"/></td> <td><s:property value="age"/></td> </tr> </s:iterator> </s:iterator> </table> </body> </html>
相关文章
- java Map 怎么遍历
- 遍历JSON对象中的key 和 value
- Java Map遍历方式的选择
- Map集合循环遍历的几种方式
- Java实现 LeetCode 623 在二叉树中增加一行(遍历树)
- Java实现 LeetCode 103 二叉树的锯齿形层次遍历
- 145. 二叉树的后序遍历
- ( “树” 之 前中后序遍历 ) 144. 二叉树的前序遍历 ——【Leetcode每日一题】
- 使用JavaScript遍历本地文件夹的文件
- Android Set集合的遍历和Map键值对遍历
- 剑指 Offer 37. 序列化二叉树-深度优先遍历-力扣双百代码
- 【Groovy】map 集合 ( map 集合遍历 | 使用 map 集合的 each 方法遍历 map 集合 | 代码示例 )
- [LeetCode] 114. 二叉树展开为链表 ☆☆☆(深度遍历)
- LeetCode之Binary Tree Level Order Traversal 层序遍历二叉树
- Map生成器 map适配器如今能够使用各种不同的Generator,iterator和常量值的组合来填充Map初始化对象
- Python语言基础学习之Python基础之列表介绍和循环遍历
- golang map遍历随机的问题
- java map遍历方式