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>