Struts2中iterator标签遍历map list总结

java] view plain copy print ?

package com.zx.demo.action;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.opensymphony.xwork2.ActionSupport;
import com.zx.demo.model.Product;
import com.zx.demo.model.Student;
public class MapAction extends ActionSupport
{
    private Map map;

    private Map studentMap;

    private Map arrayMap;

    private Map> listMap;

    public String testMap()
    {
        map=new HashMap();
        map.put("1", "one");
        map.put("2",  "two");

        studentMap=new HashMap();
        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));

        arrayMap=new HashMap();
        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"});



        listMap=new HashMap>();

        List list1=new ArrayList();
        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 list2=new ArrayList();
        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);




        return SUCCESS;

    }


    public Map getMap() {
        return map;
    }
    public void setMap(Map map) {
        this.map = map;
    }

    public Map getStudentMap() {
        return studentMap;
    }
    public void setStudentMap(Map studentMap) {
        this.studentMap = studentMap;
    }
    public Map getArrayMap() {
        return arrayMap;
    }
    public void setArrayMap(Map arrayMap) {
        this.arrayMap = arrayMap;
    }
    public Map> getListMap() {
        return listMap;
    }
    public void setListMap(Map> listMap) {
        this.listMap = listMap;
    }


}

package com.zx.demo.action; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.opensymphony.xwork2.ActionSupport; import com.zx.demo.model.Product; import com.zx.demo.model.Student; public class MapAction extends ActionSupport { private Map map; private Map studentMap; private Map arrayMap; private Map> listMap; public String testMap() { map=new HashMap(); map.put("1", "one"); map.put("2", "two"); studentMap=new HashMap(); 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)); arrayMap=new HashMap(); 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"}); listMap=new HashMap>(); List list1=new ArrayList(); 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 list2=new ArrayList(); 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); return SUCCESS; } public Map getMap() { return map; } public void setMap(Map map) { this.map = map; } public Map getStudentMap() { return studentMap; } public void setStudentMap(Map studentMap) { this.studentMap = studentMap; } public Map getArrayMap() { return arrayMap; } public void setArrayMap(Map arrayMap) { this.arrayMap = arrayMap; } public Map> getListMap() { return listMap; } public void setListMap(Map> listMap) { this.listMap = listMap; } }

2.testMap.jsp

<%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>


struts2中的map遍历总结


   1.map中的value为String字符串
   "map" id="column">
   "#column"/>
   key: "key"/>
   value:"value"/>
   ******************************************



  2.map中的value为Student对象
  "1" width="50%"  cellspacing="0" cellpadding="0">                                                                  "studentMap" id="column">                                                                 
     
    key=value 
    ID 
    num 
    name 
    sex 
    age 
     
     
     
    "#column"/> 
    "value.id"/> 
    "value.num"/> 
    "value.name"/> 
    "value.sex"/> 
    "value.age"/>



  3.map中的value为String数组
  "1" width="50%"  cellspacing="0" cellpadding="0">                                                                  "arrayMap" id="column">                                                                 
     
    key=value 
    ID 
    num 
    name 
    sex 
    age 
     
     
     
    "#column"/> 
    "value[0]"/> 
    "value[1]"/> 
    "value[2]"/> 
    "value[3]"/> 
    "value[4]"/>

  4.map中的value为list集合
  "1" width="50%"  cellspacing="0" cellpadding="0">                                                                       "listMap" id="column">       "total" value="#column.value.size"/>       "#column.value" status="s">                  if test="#s.first">if>                                                                        
     
    class 
    ID 
    num 
    name 
    sex 
    age 
     
     
     
     
     
     
    "${total}">"#column.key"/> 
    "id"/> 
    "num"/> 
    "name"/> 
    "sex"/> 
    "age"/>