一个表单有两个动作（购物车）

最新推荐文章于 2025-09-12 08:57:25 发布

javaindex

最新推荐文章于 2025-09-12 08:57:25 发布

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CC 4.0 BY-SA版权

文章标签： html action string bean session struts

本文链接：https://blog.youkuaiyun.com/javaindex/article/details/2989827

本文介绍了一个基于Struts2框架实现的简单购物车应用案例。该案例包括了使用JSP页面进行用户交互、通过Action处理用户请求、利用FormBean进行数据验证以及配置Struts2来管理不同的业务逻辑。

===================================

Buy.jsp

<%@ page language="java" pageEncoding="gb2312"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>

<html>

<head>

<title>JSP for BuyForm form</title>

</head>

<body>

<html:form action="/add.do" method="post">

请您选择书本 : <html:text property="book"/><br/>

<html:submit value="添加到购物车"/>

</html:form>

<HR>

以下是您选择过的书本：<BR>

<logic:present name="cart">

<logic:iterate id="book" name="cart">

<bean:write name="book"/>

<html:link action="/delete.do" paramId="BOOK" paramName="book">删除</html:link>

<BR>

</logic:iterate>

</logic:present>

</body>

</html>

=================================

BuyForm.java

package prj11_1.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionMapping;

/**

* MyEclipse Struts

* Creation date: 11-07-2007

* XDoclet definition:

* @struts.form name="buyForm"

public class BuyForm extends ActionForm {

* Generated fields

/** book property */

private String book;

* Generated Methods

/**

* Method validate

* @param mapping

* @param request

* @return ActionErrors

public ActionErrors validate(ActionMapping mapping,

HttpServletRequest request) {

// TODO Auto-generated method stub

return null;

}

/**

* Method reset

* @param mapping

* @param request

public void reset(ActionMapping mapping, HttpServletRequest request) {

// TODO Auto-generated method stub

}

/**

* Returns the book.

* @return String

public String getBook() {

return book;

}

/**

* Set the book.

* @param book The book to set

public void setBook(String book) {

this.book = book;

}

========================================

BuyAction.java

package prj11_1.action;

import java.util.ArrayList;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.actions.MappingDispatchAction;

import prj11_1.form.BuyForm;

public class BuyAction extends MappingDispatchAction {

public ActionForward add(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

BuyForm buyForm = (BuyForm) form;// TODO Auto-generated method stub

String book = buyForm.getBook();

HttpSession session = request.getSession();

ArrayList cart = (ArrayList)session.getAttribute("cart");

if(cart==null){

cart = new ArrayList();

session.setAttribute("cart", cart);

}

cart.add(book);

return new ActionForward("/buy.jsp");

}

public ActionForward delete(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

String book = request.getParameter("BOOK");

HttpSession session = request.getSession();

ArrayList cart = (ArrayList)session.getAttribute("cart");

cart.remove(book);

return new ActionForward("/buy.jsp");

}

public class BuyAction extends DispatchAction {//DispatchAction缺陷:Jsp要认识action内方法

public ActionForward add(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

BuyForm buyForm = (BuyForm) form;// TODO Auto-generated method stub

String book = buyForm.getBook();

HttpSession session = request.getSession();

ArrayList cart = (ArrayList)session.getAttribute("cart");

if(cart==null){

cart = new ArrayList();

session.setAttribute("cart", cart);

}

cart.add(book);

return new ActionForward("/buy.jsp");

}

public ActionForward delete(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

String book = request.getParameter("BOOK");

HttpSession session = request.getSession();

ArrayList cart = (ArrayList)session.getAttribute("cart");

cart.remove(book);

return new ActionForward("/buy.jsp");

}

}*/

======================================

Struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>

<data-sources />

<form-beans >

<form-bean name="buyForm" type="prj11_1.form.BuyForm" />

<form-bean name="lrForm" type="prj11_1.form.LrForm" />

</form-beans>

<global-exceptions />

<global-forwards />

<action-mappings >

<!--

<action

attribute="buyForm"

input="/buy.jsp"

name="buyForm"

path="/buy"

parameter="method"

scope="request"

type="prj11_1.action.BuyAction" />

-->

<action

name="buyForm"

path="/add"

parameter="add"

scope="request"

type="prj11_1.action.BuyAction" />

<action

path="/delete"

parameter="delete"

type="prj11_1.action.BuyAction" />

<action

attribute="lrForm"

input="/lr.jsp"

name="lrForm"

path="/lr"

parameter="ope"

scope="request"

type="prj11_1.action.LrAction" />

</action-mappings>

<message-resources parameter="prj11_1.ApplicationResources" />

</struts-config>

=========================================================================

Lr.jsp

<%@ page language="java" pageEncoding="GB18030"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>

<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>

<html>

<head>

<title>JSP for LrForm form</title>

</head>

<body>

<html:form action="/lr">

account : <html:text property="account"/><br/>

password : <html:text property="password"/><br/>

<html:submit property="ope"><bean:message key="info.tag.login"/></html:submit>

<html:submit property="ope"><bean:message key="info.tag.reg"/></html:submit>

</html:form>

</body>

</html>

==========================================================

LrAction.java

package prj11_1.action;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.apache.struts.actions.LookupDispatchAction;

import prj11_1.form.LrForm;

public class LrAction extends LookupDispatchAction {

//重写getKeyMethodMap方法

protected Map getKeyMethodMap() {//用一个map保存资源文件key和方法名的映射

Map map = new HashMap();

map.put("info.tag.login", "login");

map.put("info.tag.reg", "reg");

return map;

}

public ActionForward login(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

LrForm lrForm = (LrForm) form;// TODO Auto-generated method stub

System.out.println("登陆");

return null;

}

public ActionForward reg(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

LrForm lrForm = (LrForm) form;// TODO Auto-generated method stub

System.out.println("注册");

return null;

}