Struts2中iterator标签遍历map总结
编程技术 / houtizong 发布于 3年前 119
- 1.MapAction.java
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;}} 2.testMap.jsp
<%@ 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>
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