Struts2中iterator标签遍历map总结(转)

Struts2中iterator标签遍历map总结(转)

(2010-05-14 10:14:52)



转载

标签： struts2 iterator map it

分类： 学习

1.MapAction.java

Java代码

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;

}

}

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



<%@ page
contentType=
"text/html;charset=UTF-8"

%>

<%@ taglib prefix=
"s"

uri=
"/struts-tags"

%>

<html>

<head>

<title>struts2中的map遍历总结</title>

</head>

<body>

<b>
1

.map中的value为String字符串</b><br>

<s:iterator value=
"map"

id=
"column"

>

<s:property value=
"#column"

/><br>

key: <s:property value=
"key"

/><br>

value:<s:property value=
"value"

/><br>

******************************************<br>

</s:iterator>

<b>
2

.map中的value为Student对象</b>

<table border=
"1"

width=
"50%"

cellspacing=
"0"

cellpadding=
"0"

>

<tr>

<td>key=value</td>

<td>ID</td>

<td>num</td>

<td>name</td>

<td>sex</td>

<td>age</td>

</tr>

<s:iterator value=
"studentMap"

id=
"column"

>

<tr>

<td><s:property
value=
"#column"

/></td>

<td><s:property
value=
"value.id"

/></td>

<td><s:property
value=
"value.num"

/></td>

<td><s:property
value=
"value.name"

/></td>

<td><s:property
value=
"value.sex"

/></td>

<td><s:property
value=
"value.age"

/></td>

</tr>

</s:iterator>

</table>

<p>

<b>
3

.map中的value为String数组</b>

<table border=
"1"

width=
"50%"

cellspacing=
"0"

cellpadding=
"0"

>

<tr>

<td>key=value</td>

<td>ID</td>

<td>num</td>

<td>name</td>

<td>sex</td>

<td>age</td>

</tr>

<s:iterator value=
"arrayMap"

id=
"column"

>

<tr>

<td><s:property
value=
"#column"

/></td>

<td><s:property
value=
"value[0]"

/></td>

<td><s:property
value=
"value[1]"

/></td>

<td><s:property
value=
"value[2]"

/></td>

<td><s:property
value=
"value[3]"

/></td>

<td><s:property
value=
"value[4]"

/></td>

</tr>

</s:iterator>

</table>

<p>

<b>
4

.map中的value为list集合</b>

<table border=
"1"

width=
"50%"

cellspacing=
"0"

cellpadding=
"0"

>

<tr>

<td>
class


</td>

<td>ID</td>

<td>num</td>

<td>name</td>

<td>sex</td>

<td>age</td>

</tr>

<s:iterator value=
"listMap"

id=
"column"

>

<s:set name=
"total"

value=
"#column.value.size"

/>

<s:iterator value=
"#column.value"

status=
"s"

>

<tr>

<s:
if


test=
"#s.first"

><td
rowspan=
"${total}"

><s:property
value=
"#column.key"

/></td></s:
if


>

<td><s:property
value=
"id"

/></td>

<td><s:property
value=
"num"

/></td>

<td><s:property
value=
"name"

/></td>

<td><s:property
value=
"sex"

/></td>

<td><s:property
value=
"age"

/></td>

</tr>

</s:iterator>

</s:iterator>

</table>

</body>

</html>