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  • 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";
    }

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  • 原文地址:https://www.cnblogs.com/xuehen/p/4253185.html
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