Grails中使用webflow

程序员文章站 2024-03-26 13:42:29

...

Grails从0.6版本开始集成Spring的webflow功能。由于其简单的配置，化简了流程的开发。
我在自己的项目里用到了webflow，其实是个很简单的流程，图如下：
[img]/upload/attachment/133914/484f1b41-504a-37a1-85b2-a8ad09a7a2ce.jpg[/img]
业务背景是这样的：商品售出后，有些商品坏了需要返修。先创建返修单，然后走返修流程。如果商品返修成功，则标识返修单已完成返修任务，退出流程；如果商品返修失败，则做相应的业务操作包括出货单中减去相应产品数量、利润表中减去相应的当天利润等等，最后退出流程。

下面显示的是流程的完整代码

 def startFlow = {
        def id = params.id
        start{
            on("success").to "endRepair"
            on("failed").to "endFailed"
        }
        endRepair{
            def repairProduct = RepairProduct.findById(id)
            repairProduct.setFlag(true)
            repairProduct.save()
        }
        endFailed {
            def repairProduct = RepairProduct.findById(id)
            def rg = new ReturnedGoods()

            def productName = repairProduct.getProductName()
            def modelNo = repairProduct.getModelNo()
            def amount = repairProduct.getRepairNumber()
            def time = repairProduct.getTime()
            def reason = repairProduct.getReason()
            def number = repairProduct.getNumber()

            // 创建退货单
            rg.setProductName(productName)
            rg.setModelNo(modelNo)
            rg.setAmount(amount)
            rg.setTime(time)
            rg.setReason(reason)
            rg.setNumber(number)
            rg.save()

            def exportProduct = ExportProduct.findByTimeAndNumber(time,number)
            if (amount == exportProduct.getAmount())
            {
                def amount1 = exportProduct.getAmount()
                def outPrice = exportProduct.getOutPrice()
                def inPrice = exportProduct.getInPrice()
                def sellTime = exportProduct.getTime()
                def pureProfits = (outPrice - inPrice)*amount1
                def profit = Profit.findByPureProfitsAndSellTime(pureProfits,sellTime)
                profit.delete()//删除利润
                exportProduct.delete()
            }
            if(amount < exportProduct.getAmount())
            {
                def outPrice = exportProduct.getOutPrice()
                def inPrice = exportProduct.getInPrice()
                def sellTime = exportProduct.getTime()
                def pureProfits = (outPrice - inPrice)*amount
                def profit = Profit.findBySellTime(sellTime)
                profit.setPureProfits(profit.getPureProfits()-pureProfits)
                profit.save()
                exportProduct.setAmount(exportProduct.getAmount()-amount)
                exportProduct.save()
            }
        }
    }

在grails中controller可以定义流程，必须以Flow结尾。并且该流程可以看成是普通的action，不过在视图中需要创建该流程的文件夹。以上面的代码为例，代码中的controller的名字为RepairProductController，则创建的视图为repairProduct/start/start.gsp endRepair.gsp endFailed

其中需要关注的是start/start.gsp 完整代码如下：

<%@ page contentType="text/html;charset=UTF-8" %>

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <meta name="layout" content="main" />
        <title>返修流程</title>
    </head>
    <body>
        <div class="nav">
            <span class="menuButton"><g:link class="home" controller="management" action="main">返回主菜单</g:link></span>
            <span class="menuButton"><g:link class="list" action="list">RepairProduct List</g:link></span>
        </div>
        <div class="body">
            <h1>选择返修结果</h1>
            <div style="margin-left:20px;width:60%;" mce_style="margin-left:20px;width:60%;" mce_style="margin-left:20px;width:60%;">
                <g:form action="start">
                    <g:submitButton name="success" value="返修成功"/>
                    <g:submitButton name="failed" value="返修失败"/>
                </g:form>
            </div>
        </div>
    </body>
</html>

其中的action为start表示startFlow，而
<g:submitButton name="success" value="返修成功"/>
<g:submitButton name="failed" value="返修失败"/>
则是因为
start{
on("success").to "endRepair"
on("failed").to "endFailed"
}
通过 success 和 failed来跳转到各个相应的流程。

[img]/upload/attachment/133917/28b3a177-bcdf-335f-981c-b7f1c6043a96.jpg[/img]

[img]/upload/attachment/133919/715bebbb-3597-335f-ba7c-e7b8174f8c01.jpg[/img]

[img]/upload/attachment/133921/5306d2fe-0f26-3eea-895a-dbabaea9583f.jpg[/img]

Grails中使用webflow

Grails中使用Ajax

Grails –使用JAX-RS插件的RESTful Web服务

Grails 2.4.4 使用searchable插件

在Grails中使用FCKEditor

Grails中使用Spring Security遇到的坑