Struts2中iterator标签遍历m…

原文地址：Struts2中iterator标签遍历map总结(转)作者：雪后DE阳光

1.MapAction.java

Java代码

1. package com.zx.demo.action;  
2.   
3. import java.util.ArrayList;  
4. import java.util.HashMap;  
5. import java.util.List;  
6. import java.util.Map;  
7.   
8. importcom.opensymphony.xwork2.ActionSupport;  
9. importcom.zx.demo.model.Product;  
10. importcom.zx.demo.model.Student;  
11.   
12. public class MapActionextends ActionSupport  
13. {   
14.   
15.     privateMap<String,String> map;  
16.      
17.     privateMap<String,Student> studentMap;  
18.       
19.     privateMap<String,String[]> arrayMap;  
20.       
21.     privateMap<String,List<Student>>listMap;   
22.       
23.   
24.   
25.     publicString testMap()  
26.     {   
27.         map=newHashMap<String,String>();  
28.         map.put("1", "one");  
29.         map.put("2", "two");  
30.           
31.         studentMap=newHashMap<String,Student>();  
32.         studentMap.put("student1",newStudent(new Long(1),"20034140201","张三1","男",25));  
33.         studentMap.put("student2",newStudent(new Long(2),"20034140202","张三2","女",26));  
34.         studentMap.put("student3",newStudent(new Long(3),"20034140202","张三3","男",27));  
35.           
36.         arrayMap=newHashMap<String,String[]>();  
37.         arrayMap.put("arr1", newString[]{"1","2003401","leejie","male","20"});  
38.         arrayMap.put("arr2", newString[]{"2","2003402","huanglie","male","25"});  
39.         arrayMap.put("arr3", newString[]{"3","2003403","lixiaoning","male","21"});  
40.           
41.           
42.           
43.         listMap=newHashMap<String,List<Student>>();  
44.           
45.         List<Student>list1=newArrayList<Student>();  
46.         list1.add(newStudent(new Long(1),"20034140201","张三1","男",25));  
47.         list1.add(newStudent(new Long(2),"20034140202","张三2","男",25));  
48.         list1.add(newStudent(new Long(3),"20034140203","张三3","男",25));  
49.         listMap.put("class1", list1);  
50.           
51.         List<Student>list2=newArrayList<Student>();  
52.         list2.add(newStudent(new Long(1),"20034140301","李四1","男",20));  
53.         list2.add(newStudent(new Long(2),"20034140302","李四2","男",21));  
54.         list2.add(newStudent(new Long(3),"20034140303","李四3","男",22));  
55.         list2.add(newStudent(new Long(4),"20034140304","李四4","男",23));  
56.         listMap.put("class2", list2);  
57.            
58.           
59.           
60.           
61.         returnSUCCESS;   
62.           
63.     }   
64.   
65.       
66.       
67.     publicMap<String, String> getMap() {  
68.         returnmap;   
69.     }   
70.   
71.     publicvoidsetMap(Map<String, String> map){   
72.         this.map= map;   
73.     }   
74.       
75.     publicMap<String, Student>getStudentMap() {   
76.         returnstudentMap;   
77.     }   
78.   
79.     publicvoidsetStudentMap(Map<String,Student> studentMap) {  
80.         this.studentMap= studentMap;   
81.     }   
82.   
83.   
84.     publicMap<String, String[]>getArrayMap() {   
85.         returnarrayMap;   
86.     }   
87.   
88.   
89.     publicvoidsetArrayMap(Map<String,String[]> arrayMap) {  
90.         this.arrayMap= arrayMap;   
91.     }   
92.   
93.   
94.   
95.     publicMap<String,List<Student>>getListMap() {   
96.         returnlistMap;   
97.     }   
98.   
99.   
100.   
101.     publicvoidsetListMap(Map<String,List<Student>>listMap) {   
102.         this.listMap= listMap;   
103.     }   
104.       
105.       
106. }  

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

Java代码

1. <%@ pagecontentType="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:propertyvalue="#column"/></td>  
30.      <td><s:propertyvalue="value.id"/></td>  
31.      <td><s:propertyvalue="value.num"/></td>  
32.      <td><s:propertyvalue="value.name"/></td>  
33.      <td><s:propertyvalue="value.sex"/></td>  
34.      <td><s:propertyvalue="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:propertyvalue="#column"/></td>  
54.      <td><s:propertyvalue="value[0]"/></td>  
55.      <td><s:propertyvalue="value[1]"/></td>  
56.      <td><s:propertyvalue="value[2]"/></td>  
57.      <td><s:propertyvalue="value[3]"/></td>  
58.      <td><s:propertyvalue="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"><tdrowspan="${total}"><s:propertyvalue="#column.key"/></td></s:if>  
79.         <td><s:propertyvalue="id"/></td>  
80.         <td><s:propertyvalue="num"/></td>  
81.         <td><s:propertyvalue="name"/></td>  
82.         <td><s:propertyvalue="sex"/></td>  
83.         <td><s:propertyvalue="age"/></td>  
84.       </tr>  
85.      </s:iterator>  
86.   </s:iterator>  
87. </table>  
88.     
89.     
90. </body>  
91. </html>