struts2 遍历Map最全的总结 .

Struts2中iterator标签遍历map总结

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针对以下几种情况的Map:

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?? ?private?Map<String,String>?map; ??

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????private?Map<String,Student>?studentMap; ??

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???private?Map<String,String[]>?arrayMap; ??

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??private?Map<String,List<Student>>?listMap;

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??????map=new?HashMap<String,String>();???????

???? ?map.put("1",?"one"); ??

??????map.put("2",?"two"); ??

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用法：

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?? <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)); ? ?

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用法：

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??<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"}); ?? ???????? ??

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用法

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?? ?<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); ??

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用法：

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?? <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> ?