自定义表单一定会涉及<s:iterator/>迭代，一个复杂的自定义表单可能会嵌套n多层迭代。
比如一个自定义一个问卷调查页面涉及3个模型：一个Survey代表一个调查，一个Page代表一个页面，一个Question代表一个问题。每个问题中会包含不同的表单元素，就会涉及迭代。
3个模型类如下：
Survey
package com.atguigu.surveypark.model;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
/**
* 调查类
*/
public class Survey {
private Integer id;
private String title = "未命名";
private String preText = "上一步";
private String nextText = "下一步";
private String exitText = "退出";
private String doneText = "完成";
private Date createTime = new Date();
//建立从Survey到User之间多对一关联关系
private User user ;
//建立从Survey到Page之间一对多关联关系
private Set<Page> pages = new HashSet<Page>();
public Set<Page> getPages() {
return pages;
}
public void setPages(Set<Page> pages) {
this.pages = pages;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getPreText() {
return preText;
}
public void setPreText(String preText) {
this.preText = preText;
}
public String getNextText() {
return nextText;
}
public void setNextText(String nextText) {
this.nextText = nextText;
}
public String getExitText() {
return exitText;
}
public void setExitText(String exitText) {
this.exitText = exitText;
}
public String getDoneText() {
return doneText;
}
public void setDoneText(String doneText) {
this.doneText = doneText;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
}
package com.atguigu.surveypark.model;
import java.util.HashSet;
import java.util.Set;
/**
* 页面类
*/
public class Page {
private Integer id;
private String title = "未命名";
private String description;
//简历从Page到Survey之间多对一关联关系
private Survey survey;
//简历从Page到Question之间一对多关联关系
private Set<Question> questions = new HashSet<>();
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Survey getSurvey() {
return survey;
}
public void setSurvey(Survey survey) {
this.survey = survey;
}
public Set<Question> getQuestions() {
return questions;
}
public void setQuestions(Set<Question> questions) {
this.questions = questions;
}
}
package com.atguigu.surveypark.model;
/**
* 问题类
*/
public class Question {
//
private Integer id;
// 题型0-8
private int questionType;
//
private String title;
// 选项
private String options;
// 其他项
private boolean other;
// 其他项样式:0-无 1-文本框 2-下拉列表
private int otherStyle;
// 其他项下拉选项
private String otherSelectOptions;
// 矩阵式行标题集
private String matrixRowTitles;
// 矩阵式列标题集
private String matrixColTitles;
// 矩阵是下拉选项集
private String matrixSelectOptions;
//建立从Question到Page之间多对一关联关系
private Page page;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public int getQuestionType() {
return questionType;
}
public void setQuestionType(int questionType) {
this.questionType = questionType;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getOptions() {
return options;
}
public void setOptions(String options) {
this.options = options;
}
public boolean isOther() {
return other;
}
public void setOther(boolean other) {
this.other = other;
}
public int getOtherStyle() {
return otherStyle;
}
public void setOtherStyle(int otherStyle) {
this.otherStyle = otherStyle;
}
public String getOtherSelectOptions() {
return otherSelectOptions;
}
public void setOtherSelectOptions(String otherSelectOptions) {
this.otherSelectOptions = otherSelectOptions;
}
public String getMatrixRowTitles() {
return matrixRowTitles;
}
public void setMatrixRowTitles(String matrixRowTitles) {
this.matrixRowTitles = matrixRowTitles;
}
public String getMatrixColTitles() {
return matrixColTitles;
}
public void setMatrixColTitles(String matrixColTitles) {
this.matrixColTitles = matrixColTitles;
}
public String getMatrixSelectOptions() {
return matrixSelectOptions;
}
public void setMatrixSelectOptions(String matrixSelectOptions) {
this.matrixSelectOptions = matrixSelectOptions;
}
public Page getPage() {
return page;
}
public void setPage(Page page) {
this.page = page;
}
}
<%@ page language="java" contentType="text/html; charset=utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>设计调查</title>
<link rel="stylesheet" type="text/css" href='<s:url value="/styles.css" />'>
<script type="text/javascript" src="<s:url value="/jquery-1.7.1.js" />"></script>
<script type="text/javascript">
$(function(){
$("a[href*=delete]").click(function(){
return confirm("删除该项?");
});
});
</script>
</head>
<body>
<s:include value="header.jsp" />
<s:set var="sId" value="id" />
<table>
<tr>
<td colspan="2" class="tdWhiteLine"></td>
</tr>
<tr>
<td colspan="2" class="tdHeader">设计调查</td>
</tr>
<tr>
<td colspan="2" class="tdWhiteLine"></td>
</tr>
<tr>
<td class="tdSHeaderL">
<!-- 调查标题 -->
<s:property value="title" />
</td>
<td class="tdSHeaderR">
增加Logo
编辑调查
增加页
</td>
</tr>
<tr>
<td colspan="2" style="text-align: left;vertical-align: top;">
<table>
<tr>
<td width="30px"></td>
<td width="*">
<table>
<!-- 迭代页面集合 -->
<s:iterator var="p" value="pages">
<s:set var="pId" value="#p.id" />
<tr>
<td>
<table>
<tr>
<!-- 页面标题 -->
<td class="tdPHeaderL"><s:property value="#p.title" /></td>
<td class="tdPHeaderR">
编辑页标题
移动/复制页
增加问题
删除页
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td>
<table>
<tr>
<td width="30px"></td>
<td width="*">
<table>
<tr>
<td>
<table>
<!-- 迭代问题集合 -->
<s:iterator var="q" value="#p.questions">
<s:set var="qId" value="#q.id" />
<tr>
<!-- 问题题干 -->
<td class="tdQHeaderL"><s:property value="#q.title" /></td>
<td class="tdQHeaderR">
编辑问题
删除问题
</td>
</tr>
<tr>
<td colspan="2" style="text-align: left;color: black;background-color: white">
<!-- 定义变量,设置第一大类的题型 -->
<s:set var="qt" value="#q.questionType" />
<!-- 判断当前题型是否属于第一大类(0,1,2,3) -->
<s:if test='#qt lt 4'>
<s:iterator value="#q.optionArr">
<input type='<s:property value="#qt < 2?'radio':'checkbox'" />'><s:property />
<s:if test="#qt == 1 || #qt == 3"><br></s:if>
</s:iterator>
<!-- 处理other问题 -->
<s:if test="#q.other">
<input type='<s:property value="#qt < 2?'radio':'checkbox'" />'>其他
<!-- 文本框 -->
<s:if test="#q.otherStyle == 1">
<input type="text">
</s:if>
<!-- 下拉列表 -->
<s:elseif test="#q.otherStyle == 2">
<select>
<s:iterator value="#q.otherSelectOptionArr" >
<option><s:property /></option>
</s:iterator>
</select>
</s:elseif>
</s:if>
</s:if>
<!-- 下拉列表 -->
<s:if test="#qt == 4">
<select>
<s:iterator value="#q.optionArr" >
<option><s:property /></option>
</s:iterator>
</select>
</s:if>
<!-- text -->
<s:if test="#qt == 5">
<input type="text">
</s:if>
<!-- 矩阵问题(6,7,8) -->
<s:if test="#qt > 5">
<table>
<!-- 列头 -->
<tr>
<td></td>
<s:iterator value="#q.matrixColTitleArr">
<td><s:property /></td>
</s:iterator>
</tr>
<!-- 输出n多行 -->
<s:iterator value="#q.matrixRowTitleArr">
<tr>
<td><s:property /></td>
<!-- 套打控件 -->
<s:iterator value="#q.matrixColTitleArr">
<td>
<!-- radio -->
<s:if test="#qt == 6"><input type="radio"></s:if>
<s:if test="#qt == 7"><input type="checkbox"></s:if>
<s:if test="#qt == 8">
<select>
<s:iterator value="#q.matrixSelectOptionArr">
<option><s:property /></option>
</s:iterator>
</select>
</s:if>
</td>
</s:iterator>
</tr>
</s:iterator>
</table>
</s:if>
</td>
</tr>
</s:iterator>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</s:iterator>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>上一个页面引用的头部
<%@ page language="java" contentType="text/html; charset=utf-8"%> <%@ taglib uri="/struts-tags" prefix="s" %> <div class="divOuterFrame"> <div class="divInnerFrame">欢迎使用SurveyDoor调查系统!</div> </div> <div class="divWhiteLine"></div> <div class="divNavigatorOuterFrame"> <div class="divNavigatorInnerFrame"> <s:a action="LoginAction_toLoginPage" namespace="/">[首页]</s:a> <s:a action="SurveyAction_newSurvey" namespace="/">[新建调查]</s:a> <s:a action="SurveyAction_mySurveys" namespace="/">[我的调查]</s:a> [参与调查] <s:a action="RegAction_toRegPage" namespace="/">[用户注册]</s:a> [用户授权管理] [角色管理] [权限管理] [日志管理] </div> </div> <div class="divWhiteLine"></div>
原文：http://blog.csdn.net/coslay/article/details/35847949