分页查询

package com.tarena.action;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;

import org.springframework.stereotype.Controller;

import com.tarena.dao.CostDao;
import com.tarena.entity.Condition;
import com.tarena.entity.Cost;
import com.tarena.entity.Page;

@Controller
public class CostAction {
@Resource
private CostDao costDao;
List<Cost> list; // 结果集
private Page page;// 分页查找的实体类
private int pages;// 网页传回的要跳转的页面
private int countpage = 4;// 传给页面的页码数
private int totalPage;// 总页数
private Cost cost;

private String name;// 资费名
private Map<String, Object> info = new HashMap<String, Object>();// 提示信息

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public Map<String, Object> getInfo() {
return info;
}

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

public Cost getCost() {
return cost;
}

public void setCost(Cost cost) {
this.cost = cost;
}

public int getTotalPage() {
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public int getCountpage() {
return countpage;
}

public void setCountpage(int countpage) {
this.countpage = countpage;
}

public Page getPage() {
return page;
}

public void setPage(Page page) {
this.page = page;
}

public int getPages() {
return pages;
}

public void setPages(int pages) {
this.pages = pages;
}

public List<Cost> getList() {
return list;
}

public void setList(List<Cost> list) {
this.list = list;
}

/**
* 根据页面返回的页码查询对应的cost列表
*
* @return
*/

public String findCost() {

list = costDao.findAll();
totalPage = list.size() / page.getPageCount() + 1;

Condition cond = new Condition();
List<Integer> ids = new ArrayList<Integer>();

if (pages != 0) {
page.setPages(pages);
if (pages > 4 ){
countpage = pages ;

}
if(pages==totalPage){
countpage = pages-1;
}

for (int i = 0; i < page.getPageCount(); i++) {
ids.add((page.getPages() - 1) * page.getPageCount() + i + 1);
}
cond.setIds(ids);
list = costDao.findByIds(cond);
} else {
page.setPages(1);
pages = 1;
countpage = pages + 3;
for (int i = 0; i < page.getPageCount(); i++) {
ids.add((page.getPages() - 1) * page.getPageCount() + i + 1);

}
cond.setIds(ids);
list = costDao.findByIds(cond);
}

return "find";
}