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PageBean.java
package entity;

import java.util.List;

/**
 * @author DAJ
 * @version 1.0
 * @ClassName PageBean
 * @date 2019/7/24 16:52
 */
public class PageBean {
    private int totalCount;        //总记录数
    private int totalPage;         //总页数
    private List list;          //每页的数据
    private int currentPage;        //当前页码
    private int rows;               //每页的记录数

    public PageBean(int totalCount, int totalPage, List list, int currentPage, int rows) {
        this.totalCount = totalCount;
        this.totalPage = totalPage;
        this.list = list;
        this.currentPage = currentPage;
        this.rows = rows;
    }

    public PageBean() {

    }

    public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public int getTotalPage() {
        return totalPage;
    }

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

    public List getList() {
        return list;
    }

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

    public int getCurrentPage() {
        return currentPage;
    }

    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }

    public int getRows() {
        return rows;
    }



    public void setRows(int rows) {
        this.rows = rows;
    }

    @Override
    public String toString() {
        return "PageBean{" +
                "totalCount=" + totalCount +
                ", totalPage=" + totalPage +
                ", list=" + list +
                ", currentPage=" + currentPage +
                ", rows=" + rows +
                '}';
    }
}

dao层

public int getTotalCount(Map map) {
        String sql = "select count(*) from web4list where 1=1";
        System.out.println("jt      " + jt);

        //1.定义StringBulider 用来拼接我们的sql语句
        StringBuilder sb = new StringBuilder(sql);
        //2.map的遍历
        Set set = map.keySet();
        //3.准备List集合以存储查询条件
        List