Struts2中iterator标签遍历map list总结

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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 MapActionextends 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. } 

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

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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>