SEAM+AJAX4JSF 实现动态菜单

最新推荐文章于 2025-08-07 10:13:28 发布

最新推荐文章于 2025-08-07 10:13:28 发布 · 193 阅读

文章标签：

#Seam #JBoss #UI #EJB #XHTML

该博客介绍了一个基于Java EE的课程分类管理系统的设计与实现。系统通过下拉菜单的方式让用户选择一级分类和二级分类，并在用户选择了一级分类后动态加载对应的二级分类选项。此外，还提供了创建、编辑和保存课程的基本功能。

的确方便了很多！

xml 代码

<tr>
<td>
<s:decorate template="/page/tiles/formFieldDecorate.xhtml">
<ui:define name="label">分类1</ui:define>
<h:selectOneMenu value="#{_catalog1}" converter="#{entityConverter}">
<s:selectItems value="#{appCache.catalog1List}"
var="cata1" label="#{cata1.name}" noSelectionLabel="请选择"/>
<a4j:support event="onchange"
actionListener="#{courseMaintAction.loadCata2ByCata1}"
reRender="cata2Area" requestDelay="0" ajaxSingle="true" />
</h:selectOneMenu>
</s:decorate>
</td>
</tr>
<tr>
<td>
<s:decorate template="/page/tiles/formFieldDecorate.xhtml">
<ui:define name="label">分类2</ui:define>
<a4j:outputPanel id="cata2Area">
<h:selectOneMenu value="#{_catalog2}" converter="#{entityConverter}">
<s:selectItems value="#{_catalog2List}" var="cata2" label="#{cata2.name}" noSelectionLabel="请选择" />
</h:selectOneMenu>
</a4j:outputPanel>
</s:decorate>
</td>
</tr>

java 代码

//$Id: NavigateeAction.java,v 1.1 2007/02/21 11:09:46 chicochen Exp $
package com.eastidea.yctraining.action;
import static org.jboss.seam.ScopeType.SESSION;
import java.util.List;
import java.util.Set;
import javax.ejb.Remove;
import javax.ejb.Stateful;
import org.jboss.seam.annotations.Begin;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.End;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.web.RequestParameter;
import com.eastidea.yctraining.action.base.BaseMaintActionImpl;
import com.eastidea.yctraining.entity.Catalog1;
import com.eastidea.yctraining.entity.Catalog2;
import com.eastidea.yctraining.entity.Course;
import com.eastidea.yctraining.entity.Organization;
import com.eastidea.yctraining.service.CourseMaintService;
@Stateful
@Name("courseMaintAction")
public class CourseMaintActionImpl extends BaseMaintActionImpl implements CourseMaintAction {
private static final long serialVersionUID = -7494995399977805979L;
@In(value="courseMaintService", create=true)
private CourseMaintService courseMaintService;
@In(required = false, scope = SESSION)
protected Organization currentOrg;
//
@RequestParameter
private Long _courseid;
@In(required = false)@Out(required = false)
private Catalog1 _catalog1;
@In(required = false)@Out(required = false)
private Catalog2 _catalog2;
@In(required = false)@Out(required = false)
private Course _course;
@In(required = false)@Out(required = false)
private Set<Catalog2> _catalog2List;
@Destroy @Remove
public void destroy() {
}
@Begin(join=true)
public void loadCata2ByCata1(){
_catalog2List = _catalog1.getCata2Collection();
}
@Begin(join=true)
public void create() {
myAct = "create";
_course = new Course();
}
@End
public void save() {
if (myAct.equals("true")) {
_course.setCatalog1(_catalog1);
_course.setCatalog2(_catalog2);
_course.setOrganization(currentOrg);
courseMaintService.saveCourse(_course);
}
}
public void edit() {
int i =0;
i++;
}
public void update() {
// TODO Auto-generated method stub
}
public void view() {
// TODO Auto-generated method stub
}
public void delete() {
// TODO Auto-generated method stub
}
public void cancel() {
// TODO Auto-generated method stub
}
}