import java.util.ArrayList; 
import java.util.List; 
import com.yu.entity.User; 
public class PageController { 
private List<User> bigList=new ArrayList<User>(); //大集合，從外界獲取 
private List<User> smallList=new ArrayList<User>(); //小集合，返回給調(diào)用它的類 
private static int curentPageIndex=1; //當(dāng)前頁碼 
private int countPerpage=10; //每頁顯示條數(shù) 
private int pageCount; //總頁數(shù) 
private int recordCount; //總記錄條數(shù) 
//初始化塊，調(diào)用類的時(shí)候首先自動(dòng)加載 
{ 
//調(diào)用查詢數(shù)據(jù)庫的方法，返回一個(gè)List 
this.bigList = new Utils().query(); 
//計(jì)算總頁數(shù) 
if (bigList.size()%countPerpage==0) { 
this.pageCount=bigList.size()/countPerpage; 
} else { 
this.pageCount=(bigList.size()/countPerpage)+1; 
} 
} 
public PageController() { 
} 
//傳入指定頁碼的構(gòu)造函數(shù)，參看第幾頁。 
public PageController(int curentPageIndex){ 
this.curentPageIndex=curentPageIndex; 
} 
//確切的獲取當(dāng)前頁的記錄，返回一個(gè)list列表 
public List<User> setCurentPageIndex() { 
return select(); 
} 
//下一頁 
public List<User> nextPage() { 
if (curentPageIndex < pageCount ) { 
curentPageIndex++; 
System.out.println("當(dāng)前頁:"+curentPageIndex); 
} 
return select(); 
} 
//上一頁 
public List<User> previousPage() { 
if (curentPageIndex > 1) { 
curentPageIndex--; 
System.out.println("當(dāng)前頁:"+curentPageIndex); 
} 
return select(); 
} 
//此方法供以上方法調(diào)用，根據(jù)當(dāng)前頁，篩選記錄 
public List<User> select(){ 
recordCount=bigList.size(); 
for(int i=(curentPageIndex-1)*countPerpage; i<curentPageIndex*countPerpage&&i<recordCount; i++){ 
smallList.add(bigList.get(i)); 
} 
return smallList; 
} 
} 

//查詢上一頁 
private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) { 
List<User> newlist = new PageController().previousPage(); 
viewAll(newlist); 
} 
//返回第一頁的記錄 
private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) { 
List<User> newlist = new PageController(1).setCurentPageIndex(); 
viewAll(newlist); 
} 
//查詢下一頁 
private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) { 
List<User> newlist = new PageController().nextPage(); 
viewAll(newlist); 
} 
//顯示List中的用戶 
public void viewAll(List<User> list) { 
Object[][] objects = new Object[(list.size())][]; 
for (int i = 0; i < objects.length; i++) { 
objects[i] = new Object[3]; 
objects[i][0] = i + 1; 
objects[i][1] = list.get(i).getUserid(); 
objects[i][2] = list.get(i).getTruename(); 
} 
jTable1.setModel(new javax.swing.table.DefaultTableModel(objects, 
new String[] { "行號", "工號", "姓名" })); 
}