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第三十八讲：tapestry Ajax 关联下拉选框(select)组件

發布時間：2025/4/5 编程问答 28 豆豆

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源碼如下：

AJAXSelect1.java

/** * 項目名稱：TapestryStart * 開發模式：Maven+Tapestry5.x+Tapestry-hibernate+Mysql * 網址： http://www.flywind.org * 版本：1.0 * 編寫：飛風 * 時間：2012-02-29 */ package com.tapestry.app.pages; import org.apache.tapestry5.ComponentResources; import org.apache.tapestry5.annotations.InjectComponent; import org.apache.tapestry5.annotations.InjectPage; import org.apache.tapestry5.annotations.Property; import org.apache.tapestry5.corelib.components.Zone; import org.apache.tapestry5.ioc.annotations.Inject; import org.apache.tapestry5.services.Request; public class AJAXSelect1 { static final private String[] ALL_MAKES = new String[] { "梅州市", "河源市" }; static final private String[] NO_MODELS = new String[] {}; static final private String[] MEIZHOU_MODELS = new String[] { "五華縣", "興寧縣"}; static final private String[] HEYUAN_MODELS = new String[] { "紫金縣", "龍川縣" }; @Property private String areaMake; @Property private String cithModel; @Property private String keywords; @Property private String[] areaMakes; @Property @SuppressWarnings("unused") private String[] cithModels; @InjectPage private AJAXSelect2 page2; @InjectComponent private Zone cithModelZone; @Inject private ComponentResources componentResources; @Inject private Request request; void setupRender() { if (areaMakes == null) { areaMakes = ALL_MAKES; cithModels = NO_MODELS; } } Object onValueChangedFromAreaMake(String areaMake) { this.areaMake = areaMake; areaMakes = ALL_MAKES; if (areaMake == null) { cithModels = NO_MODELS; } else if (areaMake.equals(areaMakes[0])) { cithModels = MEIZHOU_MODELS; } else if (areaMake.equals(areaMakes[1])) { cithModels = HEYUAN_MODELS; } else { cithModels = NO_MODELS; } cithModel = null; return request.isXHR() ? cithModelZone.getBody() : null; } Object onSuccess() { page2.set(areaMake, cithModel, keywords); componentResources.discardPersistentFieldChanges(); return page2; } Object onGoHome() { componentResources.discardPersistentFieldChanges(); return Index.class; } }

AJAXSelect1.tml

<html t:type="layout" title="tapestryStart Index" ?t:sidebarTitle="Framework Version"? xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd" xmlns:p="tapestry:parameter"> <form t:type="form" t:id="searchCriteria"> <t:label for="areaMake"/>: <select t:type="select" t:id="areaMake" t:model="areaMakes" t:zone="cithModelZone" t:blankOption="ALWAYS" t:blankLabel="請選擇" t:validate="required"/> <t:zone t:id="cithModelZone" id="cithModelZone" style="display: inline;"> <t:label for="cithModel"/>: <select t:type="select" t:id="cithModel" t:model="cithModels"? t:blankOption="ALWAYS" t:blankLabel="請選擇" t:validate="required"/> </t:zone> 說明: <input t:type="TextField" t:id="keywords"/> (optional)<br/>? <input type="submit" value="提交"/> <t:errors/> </form><br/> </html>

AJAXSelect2.java

AJAXSelect2.tml

轉載于:https://my.oschina.net/shootercn/blog/55513

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