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，返回給調用它的類 private static int curentPageIndex=1; //當前頁碼 private int countPerpage=10; //每頁顯示條數 private int pageCount; //總頁數 private int recordCount; //總記錄條數 //初始化塊，調用類的時候首先自動加載 { //調用查詢數據庫的方法，返回一個List this.bigList = new Utils().query(); //計算總頁數 if (bigList.size()%countPerpage==0) { this.pageCount=bigList.size()/countPerpage; } else { this.pageCount=(bigList.size()/countPerpage)+1; } } public PageController() { } //傳入指定頁碼的構造函數，參看第幾頁。 public PageController(int curentPageIndex){ this.curentPageIndex=curentPageIndex; } //確切的獲取當前頁的記錄，返回一個list列表 public List<User> setCurentPageIndex() { return select(); } //下一頁 public List<User> nextPage() { if (curentPageIndex < pageCount ) { curentPageIndex++; System.out.println("當前頁:"+curentPageIndex); } return select(); } //上一頁 public List<User> previousPage() { if (curentPageIndex > 1) { curentPageIndex--; System.out.println("當前頁:"+curentPageIndex); } return select(); } //此方法供以上方法調用，根據當前頁，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" })); }