分页

package com.huawei.common;

import java.util.HashMap;
import java.util.Map;

/**
* 分页
* @author Administrator
*
*/
public class Page {

//总页数
private int pageCount = 0;
//每一页可显示的条数
private int pageSize = 10;
//数据的总数
private long rowCount = 0L;
//上一页
private int prev = 1;
//下一页
private int next;
//当前页
private int curr = 1;
//第一页
private int first = 1;
//最后一页
private int last;
//游标的宽度
private int navSize = 11;
//游标的起始位置
private int start = 1;
//存储分页数据
private Object data;
//存储搜索数据
private Map<String, Object> keywords = new HashMap<String, Object>();

//游标的结束位置
private int end;

public Page() {

}

public Page(long rowCount,int curr) {
this.init(rowCount, curr);

}


private void init(long rowCount,int curr){
//初始化rowCount
this.rowCount = rowCount<0?0:rowCount;
//计算总页数
this.pageCount = (int)Math.ceil(this.rowCount*1.0 / this.pageSize);
//处理当前页
this.curr = Math.min(curr, this.pageCount);
this.curr = Math.max(1, this.curr);



//第一页
this.first = 1;
//最后一页
this.last = this.pageCount;
//上一页
this.prev = this.curr>1?(this.curr-1):1;
//下一页
this.next = this.curr<this.pageCount?(this.curr+1):this.pageCount;

//判断navSize和PageCount的关系
if(this.pageCount > this.navSize){
//处理位置在 开始的时候
if(this.curr <=(this.navSize/2+1)){
this.start = 1;
this.end = this.navSize;
// }else if((this.pageCount - this.curr)<=(this.navSize/2-1)){ //处理位置在结束的时候
}else if((this.pageCount - this.curr)<=(Math.ceil(this.navSize*1.0/2)-1)){ //处理位置在结束的时候
//this.start = this.curr-5;
this.start = this.pageCount - (this.navSize-1);
this.end = this.pageCount;
}else{ //处理位置在中间的时候
this.start = this.curr-(this.navSize/2);
this.end = this.start+this.navSize-1;
}
}else{ //处理pageCount很小的时候
this.start = 1;
this.end = this.pageCount;
}
}

public int getPageCount() {
return pageCount;
}
public void setPageCount(int pageCount) {
this.pageCount = pageCount;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public long getRowCount() {
return rowCount;
}
public void setRowCount(long rowCount) {
this.rowCount = rowCount;
this.init(rowCount, this.curr);
}
public int getPrev() {
return prev;
}
public void setPrev(int prev) {
this.prev = prev;
}
public int getNext() {
return next;
}
public void setNext(int next) {
this.next = next;
}
public int getCurr() {
return curr;
}
public void setCurr(int curr) {
this.curr = curr;
}
public int getFirst() {
return first;
}
public void setFirst(int first) {
this.first = first;
}

public int getLast() {
return last;
}
public void setLast(int last) {
this.last = last;
}
public int getNavSize() {
return navSize;
}
public void setNavSize(int navSize) {
this.navSize = navSize;
}
public int getStart() {
return start;
}

public void setStart(int start) {
this.start = start;
}

public int getEnd() {
return end;
}

public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public void setEnd(int end) {
this.end = end;
}


public Map<String, Object> getKeywords() {
return keywords;
}

public void setKeywords(Map<String, Object> keywords) {
this.keywords = keywords;
}

public static void main(String[] args) {
//System.out.println(Math.ceil(11L*1.0/10));

Page page = new Page(760L, 71);

System.out.println("总条数："+page.getRowCount());
System.out.println("总页数："+page.getPageCount());
System.out.println("首页："+page.getFirst());
System.out.println("上一页："+page.getPrev());
System.out.println("Start："+page.getStart());
System.out.println("当前页："+page.getCurr());
System.out.println("End："+page.getEnd());
System.out.println("下一页："+page.getNext());
System.out.println("尾页："+page.getLast());

System.out.println(11/2-1);
System.out.println(76-70);
}



}