1 package com.zx.demo.action;
2 import java.util.ArrayList;
3 import java.util.HashMap;
4 import java.util.List;
5 import java.util.Map;
6 import com.opensymphony.xwork2.ActionSupport;
7 import com.zx.demo.model.Product;
8 import com.zx.demo.model.Student;
9 public class MapAction extends ActionSupport
10 {
11 private Map<String,String> map;
12
13 private Map<String,Student> studentMap;
14
15 private Map<String,String[]> arrayMap;
16
17 private Map<String,List<Student>> listMap;
18
19 public String testMap()
20 {
21 map=new HashMap<String,String>();
22 map.put("1", "one");
23 map.put("2", "two");
24
25 studentMap=new HashMap<String,Student>();
26 studentMap.put("student1",new Student(new Long(1),"20034140201","张三1","男",25));
27 studentMap.put("student2",new Student(new Long(2),"20034140202","张三2","女",26));
28 studentMap.put("student3",new Student(new Long(3),"20034140202","张三3","男",27));
29
30 arrayMap=new HashMap<String,String[]>();
31 arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"});
32 arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"});
33 arrayMap.put("arr3", new String[]{"3","2003403","lixiaoning","male","21"});
34
35
36
37 listMap=new HashMap<String,List<Student>>();
38
39 List<Student> list1=new ArrayList<Student>();
40 list1.add(new Student(new Long(1),"20034140201","张三1","男",25));
41 list1.add(new Student(new Long(2),"20034140202","张三2","男",25));
42 list1.add(new Student(new Long(3),"20034140203","张三3","男",25));
43 listMap.put("class1", list1);
44
45 List<Student> list2=new ArrayList<Student>();
46 list2.add(new Student(new Long(1),"20034140301","李四1","男",20));
47 list2.add(new Student(new Long(2),"20034140302","李四2","男",21));
48 list2.add(new Student(new Long(3),"20034140303","李四3","男",22));
49 list2.add(new Student(new Long(4),"20034140304","李四4","男",23));
50 listMap.put("class2", list2);
51
52
53
54
55 return SUCCESS;
56
57 }
58
59
60 public Map<String, String> getMap() {
61 return map;
62 }
63 public void setMap(Map<String, String> map) {
64 this.map = map;
65 }
66
67 public Map<String, Student> getStudentMap() {
68 return studentMap;
69 }
70 public void setStudentMap(Map<String, Student> studentMap) {
71 this.studentMap = studentMap;
72 }
73 public Map<String, String[]> getArrayMap() {
74 return arrayMap;
75 }
76 public void setArrayMap(Map<String, String[]> arrayMap) {
77 this.arrayMap = arrayMap;
78 }
79 public Map<String, List<Student>> getListMap() {
80 return listMap;
81 }
82 public void setListMap(Map<String, List<Student>> listMap) {
83 this.listMap = listMap;
84 }
85
86
87 }
1 <%@ page contentType="text/html;charset=UTF-8" %>
2 <%@ taglib prefix="s" uri="/struts-tags" %>
3 <html>
4 <head>
5 <title>struts2中的map遍历总结</title>
6 </head>
7 <body>
8 <b>1.map中的value为String字符串</b><br>
9 <s:iterator value="map" id="column">
10 <s:property value="#column"/><br>
11 key: <s:property value="key"/><br>
12 value:<s:property value="value"/><br>
13 ******************************************<br>
14 </s:iterator>
15
16
17 <b>2.map中的value为Student对象</b>
18 <table border="1" width="50%" cellspacing="0" cellpadding="0">
19 <tr>
20 <td>key=value</td>
21 <td>ID</td>
22 <td>num</td>
23 <td>name</td>
24 <td>sex</td>
25 <td>age</td>
26 </tr>
27 <s:iterator value="studentMap" id="column">
28 <tr>
29 <td><s:property value="#column"/></td>
30 <td><s:property value="value.id"/></td>
31 <td><s:property value="value.num"/></td>
32 <td><s:property value="value.name"/></td>
33 <td><s:property value="value.sex"/></td>
34 <td><s:property value="value.age"/></td>
35 </tr>
36 </s:iterator>
37 </table>
38 <p>
39
40
41 <b>3.map中的value为String数组</b>
42 <table border="1" width="50%" cellspacing="0" cellpadding="0">
43 <tr>
44 <td>key=value</td>
45 <td>ID</td>
46 <td>num</td>
47 <td>name</td>
48 <td>sex</td>
49 <td>age</td>
50 </tr>
51 <s:iterator value="arrayMap" id="column">
52 <tr>
53 <td><s:property value="#column"/></td>
54 <td><s:property value="value[0]"/></td>
55 <td><s:property value="value[1]"/></td>
56 <td><s:property value="value[2]"/></td>
57 <td><s:property value="value[3]"/></td>
58 <td><s:property value="value[4]"/></td>
59 </tr>
60 </s:iterator>
61 </table>
62 <p>
63 <b>4.map中的value为list集合</b>
64 <table border="1" width="50%" cellspacing="0" cellpadding="0">
65 <tr>
66 <td>class</td>
67 <td>ID</td>
68 <td>num</td>
69 <td>name</td>
70 <td>sex</td>
71 <td>age</td>
72 </tr>
73
74 <s:iterator value="listMap" id="column">
75 <s:set name="total" value="#column.value.size"/>
76 <s:iterator value="#column.value" status="s">
77 <tr>
78 <s:if test="#s.first"><td rowspan="${total}"><s:property value="#column.key"/></td></s:if>
79 <td><s:property value="id"/></td>
80 <td><s:property value="num"/></td>
81 <td><s:property value="name"/></td>
82 <td><s:property value="sex"/></td>
83 <td><s:property value="age"/></td>
84 </tr>
85 </s:iterator>
86 </s:iterator>
87 </table>
88
89
90 </body>
91 </html>
