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. import com.opensymphony.xwork2.ActionSupport;   
9. import com.zx.demo.model.Product;   
10. import com.zx.demo.model.Student;   
11.   
12. public class MapAction extends ActionSupport   
13. {   
14.   
15.     private Map<String,String> map;   
16.       
17.     private Map<String,Student> studentMap;   
18.        
19.     private Map<String,String[]> arrayMap;   
20.        
21.     private Map<String,List<Student>> listMap;   
22.        
23.   
24.   
25.     public String testMap()   
26.      {   
27.          map=new HashMap<String,String>();   
28.          map.put("1", "one");   
29.          map.put("2", "two");   
30.            
31.          studentMap=new HashMap<String,Student>();   
32.          studentMap.put("student1",new Student(new Long(1),"20034140201","张三1","男",25));   
33.          studentMap.put("student2",new Student(new Long(2),"20034140202","张三2","女",26));   
34.          studentMap.put("student3",new Student(new Long(3),"20034140202","张三3","男",27));   
35.            
36.          arrayMap=new HashMap<String,String[]>();   
37.          arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"});   
38.          arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"});   
39.          arrayMap.put("arr3", new String[]{"3","2003403","lixiaoning","male","21"});   
40.            
41.            
42.            
43.          listMap=new HashMap<String,List<Student>>();   
44.            
45.          List<Student> list1=new ArrayList<Student>();   
46.          list1.add(new Student(new Long(1),"20034140201","张三1","男",25));   
47.          list1.add(new Student(new Long(2),"20034140202","张三2","男",25));   
48.          list1.add(new Student(new Long(3),"20034140203","张三3","男",25));   
49.          listMap.put("class1", list1);   
50.            
51.          List<Student> list2=new ArrayList<Student>();   
52.          list2.add(new Student(new Long(1),"20034140301","李四1","男",20));   
53.          list2.add(new Student(new Long(2),"20034140302","李四2","男",21));   
54.          list2.add(new Student(new Long(3),"20034140303","李四3","男",22));   
55.          list2.add(new Student(new Long(4),"20034140304","李四4","男",23));   
56.          listMap.put("class2", list2);   
57.             
58.            
59.            
60.            
61.         return SUCCESS;   
62.            
63.      }   
64.   
65.        
66.        
67.     public Map<String, String> getMap() {   
68.         return map;   
69.      }   
70.   
71.     public void setMap(Map<String, String> map) {   
72.         this.map = map;   
73.      }   
74.        
75.     public Map<String, Student> getStudentMap() {   
76.         return studentMap;   
77.      }   
78.   
79.     public void setStudentMap(Map<String, Student> studentMap) {   
80.         this.studentMap = studentMap;   
81.      }   
82.   
83.   
84.     public Map<String, String[]> getArrayMap() {   
85.         return arrayMap;   
86.      }   
87.   
88.   
89.     public void setArrayMap(Map<String, String[]> arrayMap) {   
90.         this.arrayMap = arrayMap;   
91.      }   
92.   
93.   
94.   
95.     public Map<String, List<Student>> getListMap() {   
96.         return listMap;   
97.      }   
98.   
99.   
100.   
101.     public void setListMap(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. <%@ 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>