使用Struts2标签遍历集合

• 遍历Map<String,Object>
• 遍历Map<Stirng,List<Student>>
• 遍历List<Map<String,Student>>

Student.java

package action;public class Student {private Long sid;private String name;public Student() {// TODO Auto-generated constructor stub
    }public Student(Long sid,String name) {this.sid=sid;this.name=name;}public Long getSid() {return sid;}public void setSid(Long sid) {this.sid = sid;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

ClassHelloAction.java

package action;import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;public class ClassHelloAction extends AbstractAjaxAction {private String message;private List<String> names;private List<Student> stus;private Map<String, Object> map;private Map<String,List<Student>> stuMaps;private List<Map<String,Student>> listMap;public List<Map<String, Student>> getListMap() {return listMap;}public void setListMap(List<Map<String, Student>> listMap) {this.listMap = listMap;}public Map<String, List<Student>> getStuMaps() {return stuMaps;}public void setStuMaps(Map<String, List<Student>> stuMaps) {this.stuMaps = stuMaps;}public List<Student> getStus() {return stus;}public Map<String, Object> getMap() {return map;}public void setMap(Map<String, Object> map) {this.map = map;}public void setStus(List<Student> stus) {this.stus = stus;}public List<String> getNames() {return names;}public void setNames(List<String> names) {this.names = names;}public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}public String execute() throws Exception {this.stuMaps=new HashMap<String, List<Student>>();List<Student> list1=new ArrayList<Student>();list1.add(new Student(1L,"aa"));list1.add(new Student(2L,"bb"));list1.add(new Student(3L,"cc"));list1.add(new Student(4L,"dd"));List<Student> list2=new ArrayList<Student>();list2.add(new Student(1L,"qq"));list2.add(new Student(2L,"ww"));list2.add(new Student(3L,"ee"));list2.add(new Student(4L,"rr"));//List<Student>stus=new ArrayList<Student>();stus.addAll(list1);stus.addAll(list2);//Map<String,Object>this.map=new HashMap<String, Object>();map.put("1", "广州");map.put("2", "珠海");map.put("3", "东莞");map.put("4", "佛山");//Map<string,List<Student>>stuMaps.put("一班", list1);stuMaps.put("二班", list2);//List<Map<String,Student>>this.listMap=new ArrayList<Map<String,Student>>();Map<String,Student> map1=new HashMap<String, Student>();map1.put("1号", new Student(1L,"鸣人"));map1.put("2号", new Student(2L,"佐助"));Map<String,Student> map2=new HashMap<String, Student>();map1.put("3号", new Student(3L,"路飞"));map1.put("4号", new Student(4L,"索隆"));listMap.add(map1);listMap.add(map2);return "success";}}

1、遍历Map<String,Object>

<div style="float: left; border:thin solid;" >
        <p>遍历Map&lt;String,Objecg&gt;</p>
        <ul>
            <s:iterator value="map" id="id">
                <li><s:property value="#id.key" />:<s:property
                        value="#id.value" /></li>
            </s:iterator>
        </ul>
    </div>

2、遍历Map<String,List<Student>>

<div style="float: left;border: thin solid;">
        <p>遍历Map&lt;String,List&lt;Student&gt;&gt;</p>
        <ul>
            <s:iterator value="stuMaps" id="id" status="st">

                <li><s:property value="#id.key" />: <s:select list="#id.value"
                        id="stu" listKey="sid" listValue="name"></s:select></li>

            </s:iterator>
        </ul>
    </div>

3、遍历List<Map<String,Student>>

<div style="float: left;border:thin solid;">
        <p>遍历List&lt;Map&lt;String,Student&gt;&gt;</p>
        <ul>
            <s:iterator value="listMap" id="map" status="st">
                <s:iterator value="#map" id="mk" status="sa">
                    <li><s:property value="#mk.key" />:<s:property
                            value="#mk.value.name" /></li>
                </s:iterator>
            </s:iterator>
        </ul>
    </div>

4、index.jsp页面效果：