salesforce使用Apex控制器和VF实现自定义服务器端分页项目实战（自定义分页）

此篇博文将完整地介绍如何自定义数据列表分页，学习本节后你将学到如下知识：

1、如何扩展原有的标准控制器，让自定义扩展器发挥更个性的功能，在vf中增加extensions属性实现自定义控制器的关联；

2、如何利用表达式编辑或删除记录，以及如何利用表达式进行逻辑判断；

下面是code部分：

public class AccountListController {

List<Account> account{get;set;}

public AccountListController (ApexPages.StandardController controller) {

}

// instantiate the StandardSetController from a query locator
public ApexPages.StandardSetController con {
get {
if(con == null) {
con = new ApexPages.StandardSetController(Database.getQueryLocator(
[SELECT Id, Name , Type , Phone, Owner.Name, Industry FROM Account Order By Name limit 100]));
// sets the number of records in each page set
con.setPageSize(15);
}
return con;
}
set;
}

// returns a list of wrapper objects for the sObjects in the current page set
public List<Account> getAccounts() {

return (List<Account>) con.getRecords();

}

// displays the selected items
public PageReference process() {
//     for (CategoryWrapper cw : categories) {
//       if (cw.checked)
//         ApexPages.addMessage(new ApexPages.message(ApexPages.severity.INFO,cw.cat.name));
//  }
return null;
}

// indicates whether there are more records after the current page set.
public Boolean hasNext {
get {
return con.getHasNext();
}
set;
}

// indicates whether there are more records before the current page set.
public Boolean hasPrevious {
get {
return con.getHasPrevious();
}
set;
}

// returns the page number of the current page set
public Integer pageNumber {
get {
return con.getPageNumber();
}
set;
}

// returns the first page of records
public void first() {
con.first();
}

// returns the last page of records
public void last() {
con.last();
}

// returns the previous page of records
public void previous() {
con.previous();
}

// returns the next page of records
public void next() {
con.next();
}

// returns the PageReference of the original page, if known, or the home page.
public void cancel() {
con.cancel();
}

}

<apex:page standardController="Account"  extensions="AccountListController">
<apex:form >
<apex:pageBlock title="Account List">
<apex:pageBlockTable value="{!Accounts}" var="a">
<apex:column headerValue="操作" style="width:5%">
<a href="{!URLFOR($Action.Account.Edit,a.id,[retURL=''])}">编辑</a>丨
<a href="{!URLFOR($Action.Account.Delete,a.id,[retURL=''])}">删除</a>
</apex:column>

<apex:column headerValue="名称" style="width:15%">
<apex:outputLink value="{!URLFOR($Action.Account.View,a.id,[retURL=''])}">{!a.Name}</apex:outputLink>
</apex:column>
<apex:column headerValue="行业"  style="width:15%">
<apex:outputField value="{!a.Industry}"/>
</apex:column>
<apex:column headerValue="电话" style="width:15%">
<a href="#" onclick="singheadDial('6112',{!a.Phone});" id="dial2">
<apex:outputPanel rendered="{!IF(a.Phone != '',true,false)}">
{!a.Phone}
<!--
<apex:image url="{!URLFOR($Resource.phone1, 'phone1.jpg')}" height="15px" width="15px"/>
-->
</apex:outputPanel>
</a>
</apex:column>
<apex:column headerValue="类型" style="width:15%">
<apex:outputField value="{!a.Type}" />
</apex:column>
</apex:pageBlockTable>
</apex:pageBlock>

<apex:panelGrid columns="4">
<apex:commandLink action="{!first}">First</apex:commandlink>
<apex:commandLink action="{!previous}" rendered="{!hasPrevious}">Previous</apex:commandlink>
<apex:commandLink action="{!next}" rendered="{!hasNext}">Next</apex:commandlink>
<apex:commandLink action="{!last}">Last</apex:commandlink>
</apex:panelGrid>

</apex:form>
</apex:page>

效果预览：