MySQL数据查询后结果实现分页效果

page类记录分页信息

public class DBPage<T> {
    //总页数
    private int totalPageCount = 1;
    //页面大小，即每页显示记录数
    private int pageSize =3;
    //记录总数
    private int totalCount =0;
    //当前页码
    private int currPageNo = 1;
    //每页集合
    List<T> usersList = new ArrayList<>();
    public int getTotalPageCount() {
        return totalPageCount;
    }
    public void setTotalPageCount(int totalPageCount) {
        this.totalPageCount = totalPageCount;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
    public int getTotalCount() {
        return totalCount;
    }
    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }
    public int getCurrPageNo() {
        return currPageNo;
    }
    public void setCurrPageNo(int currPageNo) {
        this.currPageNo = currPageNo;
    }
    public List<T> getUsersList() {
        return usersList;
    }
    public void setUsersList(List<T> usersList) {
        this.usersList = usersList;
    }
}

用户操作类获取分页信息方法

public DBPage<User> queryByPage(DBPage<User> dbPage) {
        CachedRowSet totalCrs = this.execQuery("select count(1) from t_user");
        try {
            while (totalCrs.next()) {
                int count = totalCrs.getInt(1);
                dbPage.setTotalCount(count);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                totalCrs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if (dbPage.getTotalCount() > 0) {
            // 计算总页数
            int totalCount = dbPage.getTotalCount();
            int pageSize = dbPage.getPageSize();
            dbPage.setTotalPageCount(totalCount % pageSize == 0 ? (totalCount / pageSize) : totalCount / pageSize + 1);
        }

        CachedRowSet pageCrs = this.execQuery("select * from t_user limit ?,?",
                (dbPage.getCurrPageNo() - 1) * dbPage.getPageSize(), dbPage.getPageSize());
        try {
            while (pageCrs.next()) {
                String uname = pageCrs.getString("uname");
                String upwd = pageCrs.getString("upwd");
                int isAdmin = pageCrs.getInt("isAdmin");
                dbPage.getUsersList().add(new User(0, uname, upwd, isAdmin));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                pageCrs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return dbPage;
    }

jsp页面显示分页信息

<%
        DBPage<User> dbPage = new DBPage<>();
        int pageNo;
        String dbPageNo = (String) request.getParameter("pageNo");
        if (dbPageNo == null) {
            pageNo = 1;
        } else {
            pageNo = Integer.valueOf(dbPageNo);
            dbPage.setCurrPageNo(pageNo);
        }
        UserDaoImpl userDaoImpl = new UserDaoImpl();
        userDaoImpl.queryByPage(dbPage);
    %>
    <table border="1" align="center">
        <tr>
            <td>用户名</td>
            <td>密码</td>
            <td>管理员</td>
        </tr>
        <%
            for (User u : dbPage.getUsersList()) {
        %>
        <tr>
            <td><%=u.getUname()%></td>
            <td><%=u.getPwd()%></td>
            <td><%=u.getIsAdmin()%></td>
        </tr>
        <%
            }
        %>
    </table>
    当前<%=pageNo%>页
    <br />
    <%

    %>
    <a href="?pageNo=<%=1%>">首页</a>
    <a href="?pageNo=<%=pageNo-1<1?pageNo:pageNo-1%>">上一页</a>
    <a href="?pageNo=<%=(pageNo+1)>dbPage.getTotalPageCount()?pageNo:pageNo+1%>">下一页</a>
    <a href="?pageNo=<%=dbPage.getTotalPageCount()%>">尾页</a>