使用 struts2 和 jsp 显示一个 ArrayList [英] Display an ArrayList with struts2 and jsp

问题描述

我正在尝试学习 struts2，所以这是一个非常基本的问题.

I am trying to learn struts2, so this is a pretty basic question.

我有一个页面 input_database.jsp，以及它对应的类 input_database.java

I have a page input_database.jsp, and its corresponding class input_database.java

在类文件中，我有一个带有修改器和访问器的字符串数组列表.我想在我的 .jsp 文件中显示它

in the class file I have an arraylist of strings with a mutator and an accessor. I want to display it inside my .jsp file

我一直在尝试使用 a 来做到这一点，但我认为我在做一些根本错误的事情.

I've been trying to use a to do it, but I think I'm doing something fundamentally wrong.

这是我一直在尝试在 jsp 文件中使用的代码.arraylist 是一个名为 query_data 的私有字符串列表.我的最终目标是显示字符串数组列表的数组列表以显示我的选择语句，但我需要先找出一些简单的字符串.如果有人知道我做错了什么，或者可以指出我忽略的教程，那就太棒了

here's the code I've been trying to use in the jsp file. the arraylist is a private list of strings called query_data. my ultimate goal is to display an arraylist of arraylists of strings to display my select statement, but I need to figure out some simple strings first. If anyone knows what I'm doing wrong, or can point me to a tutorial that I've overlooked that'd be awesome

谢谢

<s:iterator value="query_data" id="something">

            <s:property value="something"/><br />

</s:iterator>

推荐答案

Display.java

import java.sql.Date;
import java.util.ArrayList;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

public class Display extends ActionSupport{

    private static final long serialVersionUID = 1L;    
    List<PhoneBean> list = null;

    public List<PhoneBean> getList() {
        return list;
    }
    public void setList(List<PhoneBean> list) {
        this.list = list;
    }

    public String execute() throws Exception{
        list = new ArrayList<PhoneBean>();

        PhoneBean bean = new PhoneBean();
        bean.setName("juan dela cruz");
        bean.setAge(17);
        bean.setBirthDate(Date.valueOf("1987-1-1"));
        bean.setContactNumber("12345");
        list.add(bean);

        bean = new PhoneBean();
        bean.setName("john cruise");
        bean.setAge(14);
        bean.setBirthDate(Date.valueOf("1988-2-2"));
        bean.setContactNumber("67890");
        list.add(bean);

        return SUCCESS;
    }

}

PhoneBean.java

import java.sql.Date;
public class PhoneBean {
    private String name = null;
    private int age = 0;
    private Date birthDate = null;
    private String contactNumber = null;

    public String getContactNumber() {
        return contactNumber;
    }
    public void setContactNumber(String contactNumber) {
        this.contactNumber = contactNumber;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Date getBirthDate() {
        return birthDate;
    }
    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }
}

struts.xml

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <package name="default" extends="struts-default">
        <action name="Display" class="phoneBook.Display">
             <result>/display.jsp</result>
        </action>
    </package>
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <session-config>
        <session-timeout>30</session-timeout>
    </session-config>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

display.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ 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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<s:iterator status="stat" value="list">
<s:property value="name"/>     <s:property value="age"/>  
<s:property value="birthDate"/>  <s:property value="contactNumber"/>
</s:iterator>
</body>
</html>

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