使用Struts2标签遍历集合-白红宇

使用Struts2标签遍历集合

阅读量：4636 次

发布时间：2019-06-09

本文共 3496 字，大约阅读时间需要 11 分钟。

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
     
       names;    private List
      
        stus;    private Map
       
         map;    private Map
        
         
          > stuMaps;    private List
          
           
            > listMap; public List
            
             
              > getListMap() { return listMap; } public void setListMap(List
              
               
                > listMap) { this.listMap = listMap; } public Map
                
                 > getStuMaps() { return stuMaps; } public void setStuMaps(Map
                 
                  > stuMaps) { this.stuMaps = stuMaps; } public List
                  
                    getStus() { return stus; } public Map
                   
                     getMap() { return map; } public void setMap(Map
                    
                      map) { this.map = map; } public void setStus(List
                     
                       stus) { this.stus = stus; } public List
                      
                        getNames() { return names; } public void setNames(List
                       
                         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
                        
                         >(); List
                         
                           list1=new ArrayList
                          
                           (); 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
                           
                             list2=new ArrayList
                            
                             (); 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
                             
                               stus=new ArrayList
                              
                               (); stus.addAll(list1); stus.addAll(list2); //Map
                               
                                 this.map=new HashMap
                                
                                 (); map.put("1", "广州"); map.put("2", "珠海"); map.put("3", "东莞"); map.put("4", "佛山"); //Map
                                 
                                  
                                   > stuMaps.put("一班", list1); stuMaps.put("二班", list2); //List
                                   
                                    
                                     > this.listMap=new ArrayList
                                     
                                      
                                       >(); Map
                                       
                                         map1=new HashMap
                                        
                                         (); map1.put("1号", new Student(1L,"鸣人")); map1.put("2号", new Student(2L,"佐助")); Map
                                         
                                           map2=new HashMap
                                          
                                           (); 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<String,Objecg></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<String,List<Student>></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<Map<String,Student>></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：

转载于:https://www.cnblogs.com/gongchenglion/p/struts2.html

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