struts2 <s:iterator> 遍历方法

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struts2 <s:iterator> 遍历方法

1.MapAction.java

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.opensymphony.xwork2.ActionSupport
import com.model.Student
public class MapAction extends ActionSupport
{

    private Map<String,String> map;

    private Map<String,Student> studentMap;

    private Map<String,String[]> arrayMap;

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


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

        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));

        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"});


        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);




        return SUCCESS;

    }

    public Map<String, String> getMap() {
       return map;
    }

   public void setMap(Map<String, String> map) {
        this.map = map;
    }

    public Map<String, Student> getStudentMap() {
        return studentMap;
    }

    public void setStudentMap(Map<String, Student> studentMap) {
        this.studentMap = studentMap;
    }

    public Map<String, String[]> getArrayMap() {
       return arrayMap;
   }


    public void setArrayMap(Map<String, String[]> arrayMap) {
        this.arrayMap = arrayMap;
    }


    public Map<String, List<Student>> getListMap() {
        return listMap;
    }

    public void setListMap(Map<String, List<Student>> listMap) {
        this.listMap = listMap;
    }


}

2.testMap.jsp
<%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>struts2中的map遍历总结</title>
</head>
<body>
   <b>1.map中的value为String字符串</b><br>
   <s:iterator value="map" id="column">
   <s:property value="#column"/><br>
   key: <s:property value="key"/><br>
   value:<s:property value="value"/><br>
   ******************************************<br>
</s:iterator>


<b>2.map中的value为Student对象</b>
<table border="1" width="50%" cellspacing="0" cellpadding="0">
    <tr>
      <td>key=value</td>
      <td>ID</td>
      <td>num</td>
      <td>name</td>
      <td>sex</td>
      <td>age</td>
    </tr>
    <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>
</table>
<p>


<b>3.map中的value为String数组</b>
<table border="1" width="50%" cellspacing="0" cellpadding="0">
    <tr>
      <td>key=value</td>
      <td>ID</td>
      <td>num</td>
      <td>name</td>
     <td>sex</td>
      <td>age</td>
    </tr>
    <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>
</table>
<p>
<b>4.map中的value为list集合</b>
<table border="1" width="50%" cellspacing="0" cellpadding="0">
    <tr>
      <td>class</td>
      <td>ID</td>
      <td>num</td>
      <td>name</td>
      <td>sex</td>
      <td>age</td>
    </tr>

   <1.<s:iterator value="listHashMap" id="listid">
   <s:iterator value="#listid.value" id="listidsub">
       <tr>
            <td><s:property value="key"/></td>
            <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>
</table>


</body>
</html>

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原文地址：https://www.cnblogs.com/jokerjason/p/5742381.html