struts2 遍历 map

我就是我 2022-09-30 06:23 173阅读 0赞

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;  
•

\--------------------------------------------------------------------------------

•        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>

\--------------------------------------------------------------------------------

•        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>

\--------------------------------------------------------------------------------

•        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>

\--------------------------------------------------------------------------------

•             
•        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>