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>