用于中继器的 JSF2 寻呼/寻呼机 [英] JSF2 Paging / Pager for Repeater
问题描述
当您编写的每条代码都立即生效并且您的日程安排不足时，您是否知道这种感觉:-P 就像'哦，是的，现在我有时间让它变得完美'.这就是我现在的状态^^
因此，我使用 JSF (ui:repeat) 实现了一个转发器，并考虑对所有实体进行分页.有没有一种简单的方法可以做到这一点?我必须考虑哪些要点?
如果有人能给我一些帮助就好了.到目前为止，我的 googleskills 还没有帮助我:-P
干杯...
这里有一个简单的例子，可以让你了解如何实现这一点.
重复分页器:
公共类RepeatPaginator {私有静态最终 int DEFAULT_RECORDS_NUMBER = 2;私有静态最终 int DEFAULT_PAGE_INDEX = 1;私有整数记录；私人整数记录总数；私人 int pageIndex;私有 int 页面；私人名单<?>原始模型；私人名单<?>模型;公共重复分页器(列表模型){this.origModel = 模型；this.records = DEFAULT_RECORDS_NUMBER;this.pageIndex = DEFAULT_PAGE_INDEX;this.recordsTotal = model.size();如果(记录> 0){页 = 记录 <= 0 ?1:记录总数/记录；如果(recordsTotal % 记录 > 0){页++；}如果(页面== 0){页数 = 1;}} 别的 {记录 = 1;页数 = 1;}更新模型()；}公共无效更新模型(){int fromIndex = getFirst();int toIndex = getFirst() + 记录；if(toIndex > this.recordsTotal) {toIndex = this.recordsTotal;}this.model = origModel.subList(fromIndex, toIndex);}公共无效下一个(){if(this.pageIndex < pages) {this.pageIndex++;}更新模型()；}公共无效前(){如果(this.pageIndex > 1){this.pageIndex--;}更新模型()；}公共 int getRecords() {退货记录；}公共 int getRecordsTotal() {返回记录总数；}公共 int getPageIndex() {返回页面索引；}公共 int getPages() {返回页面；}公共 int getFirst() {返回 (pageIndex * 记录) - 记录；}公共列表<?>获取模型(){退货模式；}public void setPageIndex(int pageIndex) {this.pageIndex = pageIndex;}}豆子:
公共类TestBean {私人列表<字符串>列表;私人 RepeatPaginator 分页器；@PostConstruct公共无效初始化(){this.list = new ArrayList();this.list.add("项目1");this.list.add("项目2");this.list.add("项目3");this.list.add("项目4");this.list.add("项目5");this.list.add("项目6");this.list.add("项目7");this.list.add("项目8");this.list.add("项目 9");this.list.add("第 10 项");this.list.add("项目 11");paginator = new RepeatPaginator(this.list);}公共RepeatPaginator getPaginator(){返回分页器；}} XHTML:
<ui:define name="content"><h:形式><ui:repeat value="#{testBean.paginator.model}" var="listItem"><div><h:outputText value="#{listItem}"/> </ui:repeat><h:commandButton value="< prev" action="#{testBean.paginator.prev}"/><h:outputText value="#{testBean.paginator.pageIndex}/#{testBean.paginator.pages}"/><h:commandButton value="next >"action="#{testBean.paginator.next}"/><h:inputHidden value="#{testBean.paginator.pageIndex}"/></h:form></ui:define></ui:composition>
Do you know this feeling when every code you write works immedietly and you underrun your schedule :-P It's like 'oh yeah now I have time to make it perfect'. That's where I am at the moment^^
So I implemented a repeater with JSF (ui:repeat) and I thought about a paging for all the entities. Is there maybe an easy way to do that? What are the points I have to think about?
Would be nice if someone gives me some help. My googleskills haven't helped me so far :-P
Cheers...
Here is a simple example that should give you the idea on how to implement this.
RepeatPaginator:
public class RepeatPaginator {
private static final int DEFAULT_RECORDS_NUMBER = 2;
private static final int DEFAULT_PAGE_INDEX = 1;
private int records;
private int recordsTotal;
private int pageIndex;
private int pages;
private List<?> origModel;
private List<?> model;
public RepeatPaginator(List<?> model) {
this.origModel = model;
this.records = DEFAULT_RECORDS_NUMBER;
this.pageIndex = DEFAULT_PAGE_INDEX;
this.recordsTotal = model.size();
if (records > 0) {
pages = records <= 0 ? 1 : recordsTotal / records;
if (recordsTotal % records > 0) {
pages++;
}
if (pages == 0) {
pages = 1;
}
} else {
records = 1;
pages = 1;
}
updateModel();
}
public void updateModel() {
int fromIndex = getFirst();
int toIndex = getFirst() + records;
if(toIndex > this.recordsTotal) {
toIndex = this.recordsTotal;
}
this.model = origModel.subList(fromIndex, toIndex);
}
public void next() {
if(this.pageIndex < pages) {
this.pageIndex++;
}
updateModel();
}
public void prev() {
if(this.pageIndex > 1) {
this.pageIndex--;
}
updateModel();
}
public int getRecords() {
return records;
}
public int getRecordsTotal() {
return recordsTotal;
}
public int getPageIndex() {
return pageIndex;
}
public int getPages() {
return pages;
}
public int getFirst() {
return (pageIndex * records) - records;
}
public List<?> getModel() {
return model;
}
public void setPageIndex(int pageIndex) {
this.pageIndex = pageIndex;
}
}
Bean:
public class TestBean {
private List<String> list;
private RepeatPaginator paginator;
@PostConstruct
public void init() {
this.list = new ArrayList<String>();
this.list.add("Item 1");
this.list.add("Item 2");
this.list.add("Item 3");
this.list.add("Item 4");
this.list.add("Item 5");
this.list.add("Item 6");
this.list.add("Item 7");
this.list.add("Item 8");
this.list.add("Item 9");
this.list.add("Item 10");
this.list.add("Item 11");
paginator = new RepeatPaginator(this.list);
}
public RepeatPaginator getPaginator() {
return paginator;
}
}
XHTML:
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
template="/WEB-INF/template/default.xhtml">
<ui:define name="content">
<h:form>
<ui:repeat value="#{testBean.paginator.model}" var="listItem">
<div>
<h:outputText value="#{listItem}"/>
</div>
</ui:repeat>
<h:commandButton value="< prev" action="#{testBean.paginator.prev}"/>
<h:outputText value="#{testBean.paginator.pageIndex} / #{testBean.paginator.pages}"/>
<h:commandButton value="next >" action="#{testBean.paginator.next}"/>
<h:inputHidden value="#{testBean.paginator.pageIndex}"/>
</h:form>
</ui:define>
</ui:composition>
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