如何遍历 JSP 中的集合并在操作 class 中设置对象中的值

Question

我有一个 JSP 从操作 class 接收集合列表。我正在遍历该列表，我希望通过表单请求将该列表的值设置为另一个操作 class 内的另一个对象。当我在迭代器中使用 <s:property 标签时使用 displayMovies.jsp 时，它会显示在集合中的不同对象上。我想将集合中的每个对象保存或传递给不同的操作 class。

displayMovies.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" import="com.sans.model.Movie"  %>
<%@ taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

Movie retrieval Page
<br />
<s:iterator value="movieRetrievedArray" var="movieS">

<s:form action="movieDetails.action" method="post" id="movieDetailsForm">
    <s:property value="title"/><br />
    <s:property value="releaseDate"/><br /> 

    <s:hidden name="movieDetailedInformation.title" value="%{title}" id="hiddenMovie" />

    <img  src="<s:property value="posterPath" />" onClick="test()">
</s:form>
    <br />
    <br />
</s:iterator>

<script type="text/javascript">

function test() {
    document.getElementById("movieDetailsForm").submit();
}

</script>

</body>
</html>

MovieDetailsActions.java

package com.esi.actions;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.sans.model.Movie;

@SuppressWarnings("serial")
@Results({
    @Result(name="success", location="/RetrieveMovies/movieDetails.jsp"),
    @Result(name="input", location="/RetrieveMovies/movieError.jsp")
})
public class MovieDetailsAction extends ActionSupport {

    private Movie movieDetailedInformation = new Movie();

    @Action(value="movieDetails")
    public String execute() {


        System.out.println(movieDetailedInformation.getTitle());


        return SUCCESS;
    }

    public Movie getMovieDetailedInformation() {
        return movieDetailedInformation;
    }

    public void setMovieDetailedInformation(Movie movieDetailedInformation) {
        this.movieDetailedInformation = movieDetailedInformation;
    }
}

Answer 1

您应该在迭代器标记上使用 status 变量。

<s:form action="movieDetails.action" method="post" id="movieDetailsForm">
<s:iterator value="movieRetrievedArray" var="movieS" status="status">    
    <s:property value="title"/><br />
    <s:property value="releaseDate"/><br />     
    <s:hidden name="movieDetailedInformationList[%{#status.index}].title" value="%{title}" id="hiddenMovie" />
    <br />
    <br />    
</s:iterator>
    <img  src="<s:property value="posterPath" />" onClick="test()">
</s:form>

movieDetailedInformationList是

private List<Movie> movieDetailedInformationList;

public List<Movie> getMovieDetailedInformationList() { return movieDetailedInformationList; }

您不需要初始化 movieDetailedInformationList，因为 Struts2 使用来自 post 请求的参数填充它。

Movie class 应该是 public 并且有默认构造函数， public setter for title 是必需的。

如何遍历 JSP 中的集合并在操作 class 中设置对象中的值

How to iterate through collection in JSP and set values in an object in an action class

java

jsp

struts2

ognl

indexed-properties