PaginationSupport页面公用类

package cn.feigme.pagination;   
  
import java.util.List;   
  
/**  
* @author feigme  
*/  
public class PaginationSupport {   
       
    //默認頁面顯示紀錄的數目   
    public final static int PAGESIZE = 10;   
       
    //頁面實際顯示的紀錄數目   
    private int pageSize = PAGESIZE;   
       
    //頁面上的索引數    
    private int pageIndexCount = 5;   
       
    //總頁數   
    private int pageCount ;   
       
    //紀錄實例集合   
    private List items;   
       
    //總紀錄數   
    private int totalCount;   
       
    //保存當前索引的紀錄數   
    private int[] indexs = new int[0];   
       
    //紀錄起始位   
    private int startIndex = 1;   
       
    /*********************構造函數*************************/  
    //兩參數的構造函數   
    public PaginationSupport(List items,int totalCount){   
        setPageSize(PAGESIZE);   
        setTotalCount(totalCount);   
        setItems(items);   
        setStartIndex(1);   
    }   
       
    //三參數的構造函數   
    public PaginationSupport(List items,int totalCount,int startIndex){   
        setPageSize(PAGESIZE);   
        setTotalCount(totalCount);   
        setItems(items);   
        setStartIndex(startIndex);   
    }   
       
    //四條件的構造函數   
    public PaginationSupport(List items,int totalCount,int startIndex,int pageSize){   
        setPageSize(pageSize);   
        setTotalCount(totalCount);   
        setItems(items);   
        setStartIndex(startIndex);   
    }   
       
    //五條件的構造函數   
    public PaginationSupport(List items,int totalCount,int startIndex,int pageSize,int pageIndexCount){   
        setPageIndexCount(pageIndexCount);   
        setPageSize(pageSize);   
        setTotalCount(totalCount);   
        setItems(items);   
        setStartIndex(startIndex);         
    }   
  
    /***********************get set方法**************************/  
    public int[] getIndexs() {return indexs;}   
    public void setIndexs(int[] indexs) {this.indexs = indexs;}   
  
    public List getItems() {return items;}   
    public void setItems(List items) {this.items = items;}   
  
    public int getPageSize() {return pageSize;}   
    public void setPageSize(int pageSize) {this.pageSize = pageSize;}   
  
    public int getStartIndex() {return startIndex;}   
    public void setStartIndex(int startIndex) {   
        if(startIndex >= this.pageCount) this.startIndex = this.pageCount;   
        else if(startIndex<=0) this.startIndex = 1;   
        else this.startIndex = startIndex;   
        if(getPageIndexCount()>this.pageCount){   
            setPageIndexCount(this.pageCount);   
        }   
           
        indexs = new int[getPageIndexCount()];   
        int istart = this.startIndex-getPageIndexCount()/2+(getPageIndexCount()%2>0?0:1);;   
        int iend = this.startIndex+getPageIndexCount()/2;   
        if(istart<=0){   
            istart =1;   
            iend = getPageIndexCount();   
        }   
        if(iend>this.pageCount){   
            iend = this.pageCount;   
            istart = this.pageCount - getPageIndexCount()+1;   
        }   
        for (int i = 0; i < iend-istart+1; i++) {      
             indexs[i]= istart+i;   
        }    
    }   
  
    public int getTotalCount() {return totalCount;}   
    public void setTotalCount(int totalCount) {   
        if(totalCount>0){   
            this.totalCount = totalCount;   
            this.pageCount = totalCount/pageSize + (totalCount%pageSize>0?1:0);   
        }else{   
            this.totalCount = 0;   
        }   
    }   
  
    public int getPageCount() {return pageCount;}   
    public void setPageCount(int pageCount) {this.pageCount = pageCount ;}   
  
    public int getPageIndexCount() {return pageIndexCount;}   
    public void setPageIndexCount(int pageIndexCount) {this.pageIndexCount = pageIndexCount;}   
       
    //下一頁   
    public int getNextIndex() {      
        int nextIndex = getStartIndex() + 1;    
        if (nextIndex > pageCount)      
            return pageCount;      
        else     
            return nextIndex;      
    }      
     
    //上一頁   
    public int getPreviousIndex() {      
        int previousIndex = getStartIndex() - 1;      
        if (previousIndex <= 0)      
            return 1;      
        else     
            return previousIndex;      
    }   
       
    //第一頁   
    public int getFirstIndex(){   
        return 1;   
    }   
       
    //最後一頁   
    public int getLastIndex(){   
        return getPageCount();   
    }   
  
}   

做了个简单的测试

java 代码
public static void main(String[] args) {   
  
        List items = new ArrayList();   
        for (int i = 0; i < 10; i++) {   
            items.add("------------->" + i);   
        }   
  
        int totalCount = 105;   
        int pageSize = 10;   
        int startIndex = 11;   
        int pageIndexCount = 6;   
  
        PaginationSupport ps = new PaginationSupport(items, totalCount,   
                startIndex, pageSize, pageIndexCount);   
  
        for (int i = 0; i < ps.getItems().size(); i++) {   
            System.out.println(ps.getItems().get(i));   
        }   
        System.out.println("共有" + ps.getTotalCount() + "條紀錄");   
        System.out.println("當前第" + ps.getStartIndex() + "頁");   
        System.out.println("共" + ps.getPageCount() + "頁");   
        System.out.println("第一頁" + ps.getFirstIndex());   
        System.out.println("上一頁" + ps.getPreviousIndex());   
  
        for (int i = 0; i < ps.getIndexs().length; i++) {   
            System.out.println(ps.getIndexs()[i]);   
        }   
  
        System.out.println("下一頁" + ps.getNextIndex());   
        System.out.println("最後一頁" + ps.getLastIndex());   
  
    }