struts2 遍历 map

Struts2中iterator标签遍历map总结

针对以下几种情况的Map:

•    private Map<String,String> map;   
•      
•    private Map<String,Student> studentMap;   
•       
•    private Map<String,String[]> arrayMap;   
•       
•    private Map<String,List<Student>> listMap;
•

 

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•        map=new HashMap<String,String>();   
•        map.put("1", "one");   
•        map.put("2", "two");   
用法：

•   <s:iterator value="map" id="column">   
•   <s:property value="#column"/><br>   
•   key: <s:property value="key"/><br>   
•   value:<s:property value="value"/><br>  
•  </s:iterator>  

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•        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));    
用法：

•    <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>

 

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•        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"});   
•           
用法

•    <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> 

 

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•           
•        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);  

用法：

•   <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>