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1.MapAction.java
package com.zx.demo.action;<br /> import java.util.ArrayList;<br /> import java.util.HashMap;<br /> import java.util.List;<br /> import java.util.Map;<br /> import com.opensymphony.xwork2.ActionSupport;<br /> import com.zx.demo.model.Product;<br /> import com.zx.demo.model.Student;<br /> public class MapAction extends ActionSupport<br /> {<br /> private Map<String,String> map;</p> <p> private Map<String,Student> studentMap;</p> <p> private Map<String,String[]> arrayMap;</p> <p> private Map<String,List<Student>> listMap;</p> <p> public String testMap()<br /> {<br /> map=new HashMap<String,String>();<br /> map.put("1", "one");<br /> map.put("2", "two");</p> <p> studentMap=new HashMap<String,Student>();<br /> studentMap.put("student1",new Student(new Long(1),"20034140201","张三1","男",25));<br /> studentMap.put("student2",new Student(new Long(2),"20034140202","张三2","女",26));<br /> studentMap.put("student3",new Student(new Long(3),"20034140202","张三3","男",27));</p> <p> arrayMap=new HashMap<String,String[]>();<br /> arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"});<br /> arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"});<br /> arrayMap.put("arr3", new String[]{"3","2003403","lixiaoning","male","21"});</p> <p> listMap=new HashMap<String,List<Student>>();</p> <p> List<Student> list1=new ArrayList<Student>();<br /> list1.add(new Student(new Long(1),"20034140201","张三1","男",25));<br /> list1.add(new Student(new Long(2),"20034140202","张三2","男",25));<br /> list1.add(new Student(new Long(3),"20034140203","张三3","男",25));<br /> listMap.put("class1", list1);</p> <p> List<Student> list2=new ArrayList<Student>();<br /> list2.add(new Student(new Long(1),"20034140301","李四1","男",20));<br /> list2.add(new Student(new Long(2),"20034140302","李四2","男",21));<br /> list2.add(new Student(new Long(3),"20034140303","李四3","男",22));<br /> list2.add(new Student(new Long(4),"20034140304","李四4","男",23));<br /> listMap.put("class2", list2);</p> <p> return SUCCESS;</p> <p> }</p> <p> public Map<String, String> getMap() {<br /> return map;<br /> }<br /> public void setMap(Map<String, String> map) {<br /> this.map = map;<br /> }</p> <p> public Map<String, Student> getStudentMap() {<br /> return studentMap;<br /> }<br /> public void setStudentMap(Map<String, Student> studentMap) {<br /> this.studentMap = studentMap;<br /> }<br /> public Map<String, String[]> getArrayMap() {<br /> return arrayMap;<br /> }<br /> public void setArrayMap(Map<String, String[]> arrayMap) {<br /> this.arrayMap = arrayMap;<br /> }<br /> public Map<String, List<Student>> getListMap() {<br /> return listMap;<br /> }<br /> public void setListMap(Map<String, List<Student>> listMap) {<br /> this.listMap = listMap;<br /> }</p> <p>}<br />
2.testMap.jsp
<%@ page contentType="text/html;charset=UTF-8" %><br /> <%@ taglib prefix="s" uri="/struts-tags" %><br /> <html><br /> <head><br /> <title>struts2中的map遍历总结</title><br /> </head><br /> <body><br /> <b>1.map中的value为String字符串</b><br><br /> <s:iterator value="map" id="column"><br /> <s:property value="#column"/><br><br /> key: <s:property value="key"/><br><br /> value:<s:property value="value"/><br><br /> ******************************************<br><br /> </s:iterator></p> <p> <b>2.map中的value为Student对象</b><br /> <table border="1" width="50%" cellspacing="0" cellpadding="0"><br /> <tr><br /> <td>key=value</td><br /> <td>ID</td><br /> <td>num</td><br /> <td>name</td><br /> <td>sex</td><br /> <td>age</td><br /> </tr><br /> <s:iterator value="studentMap" id="column"><br /> <tr><br /> <td><s:property value="#column"/></td><br /> <td><s:property value="value.id"/></td><br /> <td><s:property value="value.num"/></td><br /> <td><s:property value="value.name"/></td><br /> <td><s:property value="value.sex"/></td><br /> <td><s:property value="value.age"/></td><br /> </tr><br /> </s:iterator><br /> </table><br /> <p></p> <p> <b>3.map中的value为String数组</b><br /> <table border="1" width="50%" cellspacing="0" cellpadding="0"><br /> <tr><br /> <td>key=value</td><br /> <td>ID</td><br /> <td>num</td><br /> <td>name</td><br /> <td>sex</td><br /> <td>age</td><br /> </tr><br /> <s:iterator value="arrayMap" id="column"><br /> <tr><br /> <td><s:property value="#column"/></td><br /> <td><s:property value="value[0]"/></td><br /> <td><s:property value="value[1]"/></td><br /> <td><s:property value="value[2]"/></td><br /> <td><s:property value="value[3]"/></td><br /> <td><s:property value="value[4]"/></td><br /> </tr><br /> </s:iterator><br /> </table><br /> <p><br /> <b>4.map中的value为list集合</b><br /> <table border="1" width="50%" cellspacing="0" cellpadding="0"><br /> <tr><br /> <td>class</td><br /> <td>ID</td><br /> <td>num</td><br /> <td>name</td><br /> <td>sex</td><br /> <td>age</td><br /> </tr></p> <p> <s:iterator value="listMap" id="column"><br /> <s:set name="total" value="#column.value.size"/><br /> <s:iterator value="#column.value" status="s"><br /> <tr><br /> <s:if test="#s.first"><td rowspan="${total}"><s:property value="#column.key"/></td></s:if><br /> <td><s:property value="id"/></td><br /> <td><s:property value="num"/></td><br /> <td><s:property value="name"/></td><br /> <td><s:property value="sex"/></td><br /> <td><s:property value="age"/></td><br /> </tr><br /> </s:iterator><br /> </s:iterator><br /> </table></p> <p></body><br /> </html><br />
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